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Cheap flights from Boston to Sydney from $930

BOS — SYD
2 Nov — 9 Nov1
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

Wed 4/1110:25 -
2 stops31h 10m
Sun 8/1111:20 -
2 stops38h 28m
Deal found 28/9$1,659
Mon 19/1017:45 -
1 stop23h 20m
Mon 2/1111:10 -
1 stop21h 19m
Deal found 2/10$1,663
Tue 3/1115:30 -
2 stops26h 05m
Tue 17/1111:20 -
2 stops38h 28m
Deal found 29/9$1,710
Mon 16/1110:25 -
2 stops31h 10m
Mon 23/1111:20 -
2 stops26h 08m
Deal found 2/10$1,719
Sat 24/1019:00 -
2 stops46h 35m
Tue 3/1111:20 -
2 stops26h 08m
Deal found 29/9$1,725
Wed 21/1011:00 -
1 stop29h 30m
Wed 28/1011:10 -
1 stop27h 42m
Deal found 1/10$1,756

Find flight deals from Boston to Sydney

Round-trip from

$1,659

One-way from

$930

Popular in

December

Cheapest in

May

Average price

$2,160
Air Canada
  • Air Canada
  • 4/11-8/11
  • 4 total stops
  • 69h 38m total
  • Boston to Sydney
Search Deals
Qantas Airways
  • Qantas Airways
  • 4/11-31/12
  • 1 total stop
  • 26h 35m total
  • Boston to Sydney
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($353 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($88 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2026
Search Deals

Cheapflights Fare Finder

 
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

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Mon 26/10

10:45-09:00

1 stop31h 15m

Sydney Kingsford Smith

Wed 31/12

00:00-09:00

Nonstop0h 00m

$936

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sat 7/11

17:17-07:00

1 stop45h 43m

Sydney Kingsford Smith

Wed 31/12

00:00-09:00

Nonstop0h 00m

$960

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 1/12

07:00-06:55

1 stop31h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-09:00

Nonstop0h 00m

$969

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 9/2

07:45-08:30

1 stop32h 45m

Sydney Kingsford Smith

Wed 31/12

00:00-09:00

Nonstop0h 00m

$991

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 1/12

07:15-09:05

3 stops33h 50m

Sydney Kingsford Smith

Wed 31/12

00:00-09:00

Nonstop0h 00m

$991

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Mon 28/12

17:46-06:55

1 stop45h 09m

Sydney Kingsford Smith

Wed 31/12

00:00-09:00

Nonstop0h 00m

$992

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sat 13/2

20:15-06:20

1 stop42h 05m

Sydney Kingsford Smith

Wed 31/12

00:00-09:00

Nonstop0h 00m

$1,018
Fastest return journey

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Thu 29/10

16:49-09:00

2 stops25h 11m

Sydney Kingsford Smith

Wed 31/12

00:00-09:00

Nonstop0h 00m

$1,021

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Thu 29/10

08:25-09:20

3 stops33h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-09:00

Nonstop0h 00m

$1,024

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 20/10

05:45-08:00

2 stops35h 15m

Sydney Kingsford Smith

Wed 11/11

11:50-23:59

2 stops28h 09m

$1,781

Flights are sorted by cheapest return flights first.

Deals found on 28/9

Showing 1-10 of 21 resultsSorted by cheapest first
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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

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 1 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 $1,814). Flying from Boston to Sydney in December is currently the most expensive (average of $2,728). 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?

Airfare is below average for this route at the moment.

Boston to Sydney flights typically cost between $1,909 and $2,671 in November.
The cheapest return price found within the last 5 days was $1,659 on Air Canada (4 Nov–8 Nov).

Reviews of airlines servicing Sydney

Check out reviews from past customers who have flown with Qantas Airways,United Airlines, andAmerican 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
1,101 reviews
Check prices

Food

7.0

Crew

8.1

Entertainment

7.2

Overall

7.5

Comfort

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.
Qantas Airways
7.5
Good
1,101 reviews
Qantas Airways
7.5
Good
1,101 reviews
Check prices

Food

7.0

Crew

8.1

Entertainment

7.2

Overall

7.5

Comfort

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.
United Airlines
7.4
Good
10,282 reviews
Qantas Airways
7.5
Good
1,101 reviews
Check prices

Food

7.0

Crew

8.1

Entertainment

7.2

Overall

7.5

Comfort

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.
American Airlines
7.0
Good
12,129 reviews
Qantas Airways
7.5
Good
1,101 reviews
Check prices

Food

7.0

Crew

8.1

Entertainment

7.2

Overall

7.5

Comfort

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.

Related info for your journey

  • How long is the flight from Boston to Sydney?

    For as low as $1,781, United Airlines can have you in Sydney from Boston in 35h 15m. Airlines will cover a distance of 16240 km.

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

    Flying on American Airlines is currently your cheapest option to Sydney, with prices starting at $1,528. Additional round-trip tickets that might be worth considering are offered by Qantas Airways and United Airlines, with the lowest prices starting at $1,643 and $1,778, respectively. American Airlines is 26% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Boston to Sydney one-way?

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $653. Users have also found prices from $887 and $892 on Qantas Airways and American Airlines, respectively.

  • 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 $1,814). Flying from Boston to Sydney in December is currently the most expensive (average of $2,728). 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
Manly
Lithgow
Cronulla
Terrigal
Katoomba
Randwick
Leura
Bondi Beach
Coogee

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Boston to Sydney

AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$1,528Average$1,952FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Qantas AirwaysCheapest$1,643Average$2,159FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
United AirlinesCheapest$1,778Average$1,958FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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

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