What’s the fastest stopover option from Boston to Sydney?

Flights via San Francisco (SFO) have the shortest average one-way travel time for one-stop routes: 23h 11m. Find deals

What’s the cheapest stopover airport for flights from Boston to Sydney?

San Francisco (SFO) is the most affordable one-stop option, with an average return flight price of $1,547. Find deals

What’s the top stopover airport for flights from Boston to Sydney?

Los Angeles (LAX) – chosen by Cheapflights users on 44% of one-stop itineraries from Boston to Sydney on Cheapflights. Find deals

Which airport typically offers the quickest stopover for flights from Boston to Sydney?

Flights via San Francisco (SFO) offer the fastest connection on this route, with an average stopover time of 1h 31m.

How long is the flight from Boston to Sydney?

For as low as $2,181, Qantas Airways can have you in Sydney from Boston in 32h 20m. Airlines will cover a distance of 16240 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines flying from Boston to Sydney round-trip?

Flying on Air Canada is currently your cheapest option to Sydney, with prices starting at $1,144. Additional round-trip tickets that might be worth considering are offered by United Airlines and Qantas Airways, with the lowest prices starting at $1,223 and $2,056, respectively. Air Canada is 46% cheaper than the average price of flights available within the next 90 days to this destination.

What is the cheapest day to fly from Boston to Sydney?

Travellers seeking maximum savings on their Boston to Sydney flight should consider departing on Wednesday at midday when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Sydney ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Sydney when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

What are the most popular airlines that fly from Boston to Sydney?

The most popular airlines flying from Boston to Sydney are Air Canada, Qantas Airways and United Airlines. Something to consider prior to booking your flight.

What is the cheapest day to fly return from Boston to Sydney?

Thursday flights are found to be more expensive to fly from Boston to Sydney. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Sydney.

How far in advance should I book a flight from Boston to Sydney?

To save on the cost of your flight from Boston to Sydney, book at least 39 days before your planned departure. Booking around this time can save you about 59% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $1,690 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $1,970.

What is the cheapest month to fly from Boston to Sydney?

September is one of the best times of the year to fly to Sydney from Boston. Prices for September average $2,141 per person but you can even find prices for as low as $386. The most expensive prices can be found in the month of December. Opting for a September flight can save you 32% on your journey compared to booking in December

Can I find deals for flights from Boston to Sydney that include hotel bookings?

Yes. In addition to deals on Boston to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Boston to Sydney?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Sydney.

Can I find deals for business class flights from Boston to Sydney?

Yes. Cheapflights offers flight deals from Boston to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$801+ Flights from Boston to Sydney

Q: How much does it cost for a return flight from Boston to Sydney?

Airfare is below average for this route at the moment. Boston to Sydney flights typically cost between $1,739 and $2,266 in November. The cheapest return flight price found within the last 3 days was $1,630 on Qantas Airways (13 Nov-16 Jan). Find deals

Cheapflights Tip: The best prices from Boston Logan Intl to Sydney Kingsford Smith are usually found in September or March, booked 38 days in advance, depart on a Tuesday or Saturday and return on a Sunday

Cheap flight deals from Boston to Sydney

Round-trip from	$1,630
One-way from	$801
Popular in	December
Cheapest in	September
Average price	$1,864

Qantas Airways
13/11-16/1
3 total stops
58h 05m total
Boston to Sydney

Search Deals

30/10
2 total stops
35h 00m total
Boston to Sydney

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($500 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($97 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from Boston to Sydney

Cheapest flights from Boston to Sydney
Explore the most affordable flight options available from Boston to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Mon 22/915:30BOS - SYD

2 stops25h 30mUnited Airlines

Sun 5/1010:30SYD - BOS

2 stops23h 26mUnited Airlines

Deal found 15/9$1,570

Mon 15/916:35BOS - SYD

1 stop24h 20mQantas Airways

Mon 22/912:10SYD - BOS

1 stop25h 32mQantas Airways

Deal found 14/9$1,622

Thu 13/1108:15BOS - SYD

2 stops33h 05mQantas Airways

Fri 16/114:05SYD - BOS

1 stop25h 00mQantas Airways

Deal found 13/9$1,630

Wed 19/1112:00BOS - SYD

2 stops29h 20mQantas Airways

Fri 28/1114:05SYD - BOS

1 stop23h 31mQantas Airways

Deal found 14/9$1,646

Sun 14/1212:00BOS - SYD

2 stops31h 35mQantas Airways

Sat 31/114:05SYD - BOS

1 stop23h 05mQantas Airways

Deal found 14/9$1,652

Sun 16/1108:15BOS - SYD

2 stops33h 05mQantas Airways

Fri 16/114:05SYD - BOS

1 stop20h 55mQantas Airways

Deal found 13/9$1,654

Sat 15/1112:00BOS - SYD

2 stops29h 50mQantas Airways

Wed 10/1214:05SYD - BOS

1 stop22h 42mQantas Airways

Deal found 13/9$1,657

Sun 2/1115:43BOS - SYD

2 stops27h 52mQantas Airways

Sun 9/1114:05SYD - BOS

1 stop24h 57mQantas Airways

Deal found 14/9$1,663

Sun 14/916:15BOS - SYD

1 stop24h 40mUnited Airlines

Sun 28/909:30SYD - BOS

1 stop36h 29mUnited Airlines

Deal found 13/9$1,666

Best flights from Boston to Sydney
Discover carefully curated flight deals from Boston to Sydney that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 September 2025.

Sun 8/208:15BOS - SYD

2 stops33h 35mQantas Airways

Tue 10/313:00SYD - BOS

2 stops32h 56mQantas Airways

Deal found 15/9$2,012

Sat 17/116:50BOS - SYD

3 stops34h 55mAlaska Airlines

Sat 31/121:40SYD - BOS

2 stops34h 07mAlaska Airlines

Deal found 14/9$2,170

Sun 8/307:40BOS - SYD

1 stop32h 20mUnited Airlines

Sat 28/311:50SYD - BOS

1 stop22h 19mUnited Airlines

Deal found 15/9$2,181

Fri 17/1008:10BOS - SYD

2 stops32h 25mDelta

Mon 27/1009:40SYD - BOS

2 stops26h 35mDelta

Deal found 13/9$2,187

Tue 7/1018:19BOS - SYD

2 stops27h 26mMultiple Airlines

Tue 4/1114:10SYD - BOS

2 stops23h 25mMultiple Airlines

Deal found 13/9$2,190

Wed 29/1016:46BOS - SYD

3 stops35h 59mAlaska Airlines

Sun 9/1121:40SYD - BOS

2 stops35h 43mAlaska Airlines

Deal found 13/9$2,181

Sat 7/218:17BOS - SYD

1 stop22h 48mUnited Airlines

Tue 10/312:10SYD - BOS

1 stop22h 18mUnited Airlines

Deal found 15/9$2,181

Wed 29/1007:00BOS - SYD

1 stop33h 00mUnited Airlines

Wed 5/1112:10SYD - BOS

1 stop20h 56mUnited Airlines

Deal found 14/9$2,181

Wed 11/218:17BOS - SYD

1 stop22h 48mUnited Airlines

Tue 10/310:20SYD - BOS

1 stop21h 18mUnited Airlines

Deal found 15/9$2,181

Wed 15/1011:02BOS - SYD

2 stops29h 58mUnited Airlines

Wed 29/1012:10SYD - BOS

2 stops24h 39mUnited Airlines

Deal found 13/9$2,187

Last-minute flights from Boston to Sydney
Discover last-minute flight deals from Boston to Sydney. Data last updated 16 September 2025 and is based on user searches.

Mon 15/916:35BOS - SYD

1 stop24h 20mQantas Airways

Mon 22/912:10SYD - BOS

1 stop25h 32mQantas Airways

Deal found 14/9$1,622

Mon 15/915:45BOS - SYD

2 stops25h 10mUnited Airlines

Mon 22/910:20SYD - BOS

1 stop20h 53mUnited Airlines

Deal found 14/9$1,678

Tue 16/918:14BOS - SYD

1 stop22h 41mQantas Airways

Thu 18/909:10SYD - BOS

1 stop21h 57mQantas Airways

Deal found 12/9$1,693

Tue 16/914:40BOS - SYD

2 stops26h 25mAmerican Airlines

Thu 18/921:30SYD - BOS

2 stops23h 17mAmerican Airlines

Deal found 12/9$1,765

Fri 19/918:00BOS - SYD

1 stop23h 05mAmerican Airlines

Tue 30/909:10SYD - BOS

1 stop35h 37mAmerican Airlines

Deal found 12/9$1,745

Fri 19/916:30BOS - SYD

1 stop24h 05mDelta

Tue 30/909:25SYD - BOS

2 stops35h 10mDelta

Deal found 12/9$1,759

Mon 22/915:30BOS - SYD

2 stops25h 30mUnited Airlines

Sun 5/1010:30SYD - BOS

2 stops23h 26mUnited Airlines

Deal found 15/9$1,570

Thu 23/1006:17BOS - SYD

3 stops35h 43mMultiple Airlines

Fri 31/1010:20SYD - BOS

2 stops38h 12mMultiple Airlines

Deal found 13/9$1,798

Wed 29/1017:49BOS - SYD

1 stop24h 11mQantas Airways

Sat 8/1117:50SYD - BOS

2 stops37h 01mQantas Airways

Deal found 13/9$1,706

One-way flights from Boston to Sydney
Search for one-way flight options from Boston to Sydney. Find affordable one-way fares based on user searches. Data last updated 16 September 2025.

Thu 30/1007:00BOS - SYD

2 stops35h 00mMultiple Airlines

Deal found 15/9$801

Wed 29/1006:16BOS - SYD

3 stops35h 44mMultiple Airlines

Deal found 14/9$825

Sun 8/207:00BOS - SYD

2 stops32h 25mMultiple Airlines

Deal found 14/9$929

Mon 10/1107:50BOS - SYD

2 stops44h 25mANA

Deal found 13/9$1,024

Wed 11/212:53BOS - SYD

3 stops55h 37mMultiple Airlines

Deal found 14/9$1,063

Thu 20/1108:15BOS - SYD

1 stop32h 45mQantas Airways

Deal found 12/9$1,108

Thu 30/1017:49BOS - SYD

1 stop24h 11mQantas Airways

Deal found 15/9$1,111

Thu 20/1115:43BOS - SYD

2 stops29h 17mFiji Airways

Deal found 12/9$1,130

Fly from

Fly to

Route

Depart

Return

Price

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 8/2

08:15-09:50

2 stops33h 35m

Sydney Kingsford Smith

Tue 10/3

13:00-06:56

2 stops32h 56m

$2,012

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 17/1

16:50-19:45

3 stops34h 55m

Sydney Kingsford Smith

Sat 31/1

21:40-15:47

2 stops34h 07m

$2,170

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 8/3

07:40-07:00

1 stop32h 20m

Sydney Kingsford Smith

Sat 28/3

11:50-19:09

1 stop22h 19m

$2,181

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 29/10

16:46-19:45

3 stops35h 59m

Sydney Kingsford Smith

Sun 9/11

21:40-17:23

2 stops35h 43m

$2,181

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 7/2

18:17-09:05

1 stop22h 48m

Sydney Kingsford Smith

Tue 10/3

12:10-19:28

1 stop22h 18m

$2,181

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 29/10

07:00-07:00

1 stop33h 00m

Sydney Kingsford Smith

Wed 5/11

12:10-17:06

1 stop20h 56m

$2,181

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 11/2

18:17-09:05

1 stop22h 48m

Sydney Kingsford Smith

Tue 10/3

10:20-16:38

1 stop21h 18m

$2,181

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 17/10

08:10-07:35

2 stops32h 25m

Sydney Kingsford Smith

Mon 27/10

09:40-21:15

2 stops26h 35m

$2,187

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 15/10

11:02-08:00

2 stops29h 58m

Sydney Kingsford Smith

Wed 29/10

12:10-21:49

2 stops24h 39m

$2,187

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 7/10

18:19-12:45

2 stops27h 26m

Sydney Kingsford Smith

Tue 4/11

14:10-21:35

2 stops23h 25m

$2,190

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 21 results

Best time to book a flight from Boston to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Boston with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Sydney

Prices

How far ahead should I book a flight from Boston to Sydney?

The best time to book flights from Boston to Sydney is 38 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Boston to Sydney?

Currently, May is the cheapest month in which you can book a flight from Boston to Sydney (average of $129). Flying from Boston to Sydney in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to SYD?

One of the essential ways to save on airfare from Boston to Sydney is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 32% on airfare.

How much does it cost for a return flight from Boston to Sydney?

Reviews of airlines servicing Sydney

Check out reviews from past customers who have flown with Qantas Airways, United Airlines, andAir Canada from Boston to Sydney to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Qantas Airways

7.5

Good

905 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sept 2025

SYD - BNE

Great. Except I haven’t claimed my free lounge passes since 2022 on my Qantas credit card. That’s lots of flights I would have booked if you’d reminded me

Qantas Airways

7.5

Good

905 reviews

Qantas Airways

7.5

Good

905 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sept 2025

SYD - BNE

Great. Except I haven’t claimed my free lounge passes since 2022 on my Qantas credit card. That’s lots of flights I would have booked if you’d reminded me

United Airlines

7.4

Good

8,929 reviews

Qantas Airways

7.5

Good

905 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sept 2025

SYD - BNE

Great. Except I haven’t claimed my free lounge passes since 2022 on my Qantas credit card. That’s lots of flights I would have booked if you’d reminded me

Air Canada

7.1

Good

10,000 reviews

Qantas Airways

7.5

Good

905 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sept 2025

SYD - BNE

Great. Except I haven’t claimed my free lounge passes since 2022 on my Qantas credit card. That’s lots of flights I would have booked if you’d reminded me

Related info for your journey

How long is the flight from Boston to Sydney?
For as low as $2,181, Qantas Airways can have you in Sydney from Boston in 32h 20m. Airlines will cover a distance of 16240 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Boston to Sydney round-trip?
Flying on Air Canada is currently your cheapest option to Sydney, with prices starting at $1,144. Additional round-trip tickets that might be worth considering are offered by United Airlines and Qantas Airways, with the lowest prices starting at $1,223 and $2,056, respectively. Air Canada is 46% cheaper than the average price of flights available within the next 90 days to this destination.
Can I find deals for flights from Boston to Sydney that include hotel bookings?
Yes. In addition to deals on Boston to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Boston to Sydney?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Sydney.
Can I find deals for business class flights from Boston to Sydney?
Yes. Cheapflights offers flight deals from Boston to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Boston to Sydney?
Currently, May is the cheapest month in which you can book a flight from Boston to Sydney (average of $129). Flying from Boston to Sydney in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Direct flights to New South Wales

Other flights to Sydney

Top 3 airlines flying from Boston to Sydney

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$1,144	Average$2,386	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	Cheapest$1,223	Average$1,865	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Qantas Airways	Cheapest$2,056	Average$3,495	FlexibilityNo cancel fee	On-time74%	Search Qantas Airways flights

Fly with Cheapflights

How does Cheapflights help users find flights from Boston to Sydney?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Boston to Sydney. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Boston to Sydney?

Cheapflights helps you find that perfect flight to Sydney from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Boston to Sydney with no change fees?

Certainly. Search results for flights to Sydney from Boston shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Boston to Sydney become cheaper?

Of course! You can now track prices for flights from Boston to Sydney and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Boston to Sydney from $801

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Boston Logan Intl to Sydney Kingsford Smith are usually found in September or March, booked 38 days in advance, depart on a Tuesday or Saturday and return on a Sunday

Cheap flight deals from Boston to Sydney

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Boston to Sydney

Cheapest flights from Boston to SydneyExplore the most affordable flight options available from Boston to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Explore the most affordable flight options available from Boston to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Boston to Sydney that are best for you.

Best time to book a flight from Boston to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Boston with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Boston to Sydney

How far ahead should I book a flight from Boston to Sydney?

What is the cheapest month to book a flight from Boston to Sydney?

What is the cheapest time of day to fly from BOS to SYD?

How much does it cost for a return flight from Boston to Sydney?

What’s the top stopover airport for flights from Boston to Sydney?

What’s the fastest stopover option from Boston to Sydney?

What’s the fastest stopover option from Boston to Sydney?

Which airport typically offers the quickest stopover for flights from Boston to Sydney?

Reviews of airlines servicing Sydney

Check out reviews from past customers who have flown with Qantas Airways, United Airlines, andAir Canada from Boston to Sydney to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Boston to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from Boston to Sydney?

What are the cheapest airlines flying from Boston to Sydney round-trip?

Can I find deals for flights from Boston to Sydney that include hotel bookings?

How can I find direct flights from Boston to Sydney?

Can I find deals for business class flights from Boston to Sydney?

What is the cheapest month to book a flight from Boston to Sydney?

Travelling to a place near Sydney?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Complete your trip

Complete your trip to Sydney by adding a car hire and/or hotel booking to your travel itinerary.

Top 3 airlines flying from Boston to Sydney

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Boston to Sydney?

Why should you use Cheapflights to find cheap flight tickets from Boston to Sydney?

Can Cheapflights find flights from Boston to Sydney with no change fees?

Can Cheapflights notify me if prices for flights from Boston to Sydney become cheaper?

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Cheapest flights from Boston to Sydney
Explore the most affordable flight options available from Boston to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.