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Cheap flights from Boston to Sydney from $947

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SYD
15 Jul — 22 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Boston to Sydney

Enter your travel dates to find the best prices.

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 15 June 2026.

Mon 30/1117:45
BOS
-
SYD
1 stop23h 15m
Qantas Airways
Sat 12/1207:05
SYD
-
BOS
2 stops31h 14m
Qantas Airways
Deal found 11/6$1,727
Sat 8/819:15
BOS
-
SYD
2 stops46h 05m
Air Canada
Sun 30/809:20
SYD
-
BOS
2 stops38h 30m
Air Canada
Deal found 10/6$1,734
Tue 3/1121:05
BOS
-
SYD
1 stop41h 45m
Qatar Airways
Tue 17/1115:50
SYD
-
BOS
1 stop38h 30m
Qatar Airways
Deal found 12/6$1,751
Sat 8/810:30
BOS
-
SYD
1 stop30h 35m
Qantas Airways
Sat 12/1207:05
SYD
-
BOS
2 stops31h 14m
Qantas Airways
Deal found 10/6$1,754
Wed 16/922:00
BOS
-
SYD
1 stop29h 10m
Qatar Airways
Wed 7/1015:50
SYD
-
BOS
1 stop38h 25m
Qatar Airways
Deal found 14/6$1,757
Sun 1/1121:05
BOS
-
SYD
1 stop41h 45m
Multiple Airlines
Wed 11/1115:50
SYD
-
BOS
1 stop38h 30m
Multiple Airlines
Deal found 10/6$1,762
Sat 15/810:40
BOS
-
SYD
3 stops30h 40m
Air Canada
Sun 30/809:20
SYD
-
BOS
2 stops38h 30m
Air Canada
Deal found 11/6$1,777
Sat 8/819:15
BOS
-
SYD
2 stops46h 05m
Air Canada
Sat 12/1216:00
SYD
-
BOS
2 stops33h 37m
Air Canada
Deal found 10/6$1,787

Find flight deals from Boston to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 15 June 2026.

Round-trip from

$1,727

One-way from

$947

Popular in

December

Cheapest in

September

Average price

$2,096
Qantas Airways
  • Qantas Airways
  • 30/11-12/12
  • 3 total stops
  • 54h 29m total
  • Boston to Sydney
Search Deals
5/8
  • 5/8
  • 2 total stops
  • 46h 05m total
  • Boston to Sydney
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($459 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($114 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Boston to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 15 June 2026.
Use the filters below to find and compare flights from Boston to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 27/7

14:15-07:00

2 stops26h 45m

Sydney Kingsford Smith

Wed 5/8

10:20-17:04

1 stop20h 44m

$1,900

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 29/6

08:15-06:50

2 stops32h 35m

Sydney Kingsford Smith

Tue 7/7

09:15-20:00

2 stops24h 45m

$1,906

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 27/7

13:37-06:55

2 stops27h 18m

Sydney Kingsford Smith

Mon 3/8

10:20-21:53

2 stops25h 33m

$1,906

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 26/6

20:35-06:50

1 stop44h 15m

Sydney Kingsford Smith

Sun 5/7

09:15-23:54

1 stop28h 39m

$1,991

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 26/9

22:00-20:40

2 stops32h 40m

Sydney Kingsford Smith

Fri 9/10

15:50-15:15

1 stop38h 25m

$2,028

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 3/7

10:55-06:50

1 stop29h 55m

Sydney Kingsford Smith

Fri 10/7

09:15-19:20

1 stop24h 05m

$2,042

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 1/12

12:20-07:00

2 stops26h 40m

Sydney Kingsford Smith

Tue 15/12

14:00-18:55

1 stop20h 55m

$2,067

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 18/10

22:00-18:10

1 stop29h 10m

Sydney Kingsford Smith

Thu 22/10

15:50-15:15

1 stop38h 25m

$2,113

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 28/6

07:35-06:50

1 stop33h 15m

Sydney Kingsford Smith

Sun 5/7

09:15-22:41

2 stops27h 26m

$2,118

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 18/11

07:30-09:15

1 stop33h 45m

Sydney Kingsford Smith

Sat 28/11

11:50-23:20

1 stop27h 30m

$2,138

Flights are sorted by cheapest return flights first.

Deals found on 13/6

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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

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

The best time to book flights from Boston to Sydney is 72 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, September is the cheapest month in which you can book a flight from Boston to Sydney (average of $1,710). Flying from Boston to Sydney in December is currently the most expensive (average of $2,966). 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.

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

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated 15 June 2026.
Check out reviews from past customers who have flown with Qantas Airways and United Airlines 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
1,046 reviews
Check prices

Entertainment

7.2

Food

7.0

Boarding

7.7

Crew

8.2

Comfort

7.5

Overall

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.
Qantas Airways
7.5
Good
1,046 reviews
Qantas Airways
7.5
Good
1,046 reviews
Check prices

Entertainment

7.2

Food

7.0

Boarding

7.7

Crew

8.2

Comfort

7.5

Overall

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.
United Airlines
7.4
Good
9,824 reviews
Qantas Airways
7.5
Good
1,046 reviews
Check prices

Entertainment

7.2

Food

7.0

Boarding

7.7

Crew

8.2

Comfort

7.5

Overall

7.5

Reviews

1 / 20
2.0
Mediocre

Midhat,Apr 2026

AKL - ADL

Poor as usual. Flight was delayed for more than 4 hours. The Staff was rude. Food was terrible. Very unreliable, unprofessional and unpleasant.

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?

    For as low as $1,900, United Airlines can have you in Sydney from Boston in 26h 45m. 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 Qantas Airways is currently your cheapest option to Sydney, with prices starting at $1,618. Another option worth looking into is United Airlines, starting at $1,651 round trip. Qantas Airways is 22% 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, September is the cheapest month in which you can book a flight from Boston to Sydney (average of $1,710). Flying from Boston to Sydney in December is currently the most expensive (average of $2,966). 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

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Penrith
Katoomba
Cronulla
Manly
Terrigal
Lithgow
Randwick
Bondi Beach
Leura
Coogee

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.

Top 2 airlines flying from Boston to Sydney

Discover the top 2 airlines that operate flights from Boston to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 15 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,618Average$2,753FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
United AirlinesCheapest$1,651Average$2,035FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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?

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.