What is the cheapest airline that flies from Boston Logan Intl to Sydney Kingsford Smith?

United Airlines and Qantas Airways are the most popular carriers operating from Boston Logan Intl to Sydney Kingsford Smith

When did momondo last update prices for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

Prices for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport refresh daily.

How many operators does momondo search for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

There are 2 operators available for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport as of November 2026.

How old do you have to be to fly from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Sydney Kingsford Smith Airport.

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

The travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$790 Cheap Flights from Boston to Sydney in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boston to Sydney

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

20:40 - 18:20BOS Boston Logan Intl-SYD Sydney Kingsford Smith

29h 40m1 stop Doha Hamad Intl

15:50 - 13:55SYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 05m1 stop Doha Hamad Intl

$1,888Qatar Airways

Sun, 21 Feb - Sun, 7 Mar

20:40 - 19:20BOS Boston Logan Intl-SYD Sydney Kingsford Smith

30h 40m1 stop Doha Hamad Intl

15:50 - 13:55SYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 05m1 stop Doha Hamad Intl

$1,891Qatar Airways

Fri, 22 Jan - Thu, 4 Mar

20:40 - 18:20BOS Boston Logan Intl-SYD Sydney Kingsford Smith

29h 40m1 stop Doha Hamad Intl

22:10 - 14:15SYD Sydney Kingsford Smith-BOS Boston Logan Intl

32h 05m1 stop Doha Hamad Intl

$1,892Multiple Airlines

Sun, 14 Feb - Sat, 27 Feb

20:40 - 18:20BOS Boston Logan Intl-SYD Sydney Kingsford Smith

29h 40m1 stop Doha Hamad Intl

22:10 - 14:15SYD Sydney Kingsford Smith-BOS Boston Logan Intl

32h 05m1 stop Doha Hamad Intl

$1,892Multiple Airlines

Wed, 17 Feb - Sat, 27 Feb

14:20 - 09:00BOS Boston Logan Intl-SYD Sydney Kingsford Smith

26h 40m1 stop Los Angeles

19:15 - 21:27SYD Sydney Kingsford Smith-BOS Boston Logan Intl

42h 12m2 stops Auckland Intl Dallas/Fort Worth

$1,910Qantas Airways

Thu, 3 Dec - Wed, 9 Dec

19:00 - 09:00BOS Boston Logan Intl-SYD Sydney Kingsford Smith

46h 00m1 stop Los Angeles

07:05 - 22:00SYD Sydney Kingsford Smith-BOS Boston Logan Intl

30h 55m2 stops Auckland Intl Los Angeles

$1,954Qantas Airways

Tue, 22 Dec - Wed, 27 Jan

08:05 - 09:00BOS Boston Logan Intl-SYD Sydney Kingsford Smith

32h 55m1 stop Los Angeles

14:05 - 20:37SYD Sydney Kingsford Smith-BOS Boston Logan Intl

22h 32m1 stop Dallas/Fort Worth

$1,987Qantas Airways

Tue, 24 Nov - Tue, 1 Dec

08:20 - 09:20BOS Boston Logan Intl-SYD Sydney Kingsford Smith

33h 00m1 stop San Francisco

11:50 - 23:59SYD Sydney Kingsford Smith-BOS Boston Logan Intl

28h 09m2 stops San Francisco Washington, D.C. Dulles Intl

$2,021United Airlines

Tue, 24 Nov - Tue, 1 Dec

05:30 - 09:05BOS Boston Logan Intl-SYD Sydney Kingsford Smith

35h 35m2 stops Washington, D.C. Dulles Intl Los Angeles

11:50 - 23:59SYD Sydney Kingsford Smith-BOS Boston Logan Intl

28h 09m2 stops San Francisco Washington, D.C. Dulles Intl

$2,021United Airlines

Tue, 24 Nov - Tue, 1 Dec

18:01 - 09:20BOS Boston Logan Intl-SYD Sydney Kingsford Smith

23h 19m1 stop San Francisco

11:50 - 23:59SYD Sydney Kingsford Smith-BOS Boston Logan Intl

28h 09m2 stops San Francisco Washington, D.C. Dulles Intl

$2,063United Airlines

Tue, 1 Dec - Wed, 9 Dec

Cheap last-minute flights

Enter your travel dates to find the best prices.

09:45 - 08:35BOS Boston Logan Intl-SYD Sydney Kingsford Smith

30h 50m2 stops San Francisco Auckland Intl

07:30 - 23:25SYD Sydney Kingsford Smith-BOS Boston Logan Intl

31h 55m2 stops Auckland Intl Houston George Bush Intcntl

$2,154Air New Zealand

Fri, 13 Nov - Tue, 17 Nov

14:25 - 09:00BOS Boston Logan Intl-SYD Sydney Kingsford Smith

26h 35m1 stop Los Angeles

11:10 - 21:20SYD Sydney Kingsford Smith-BOS Boston Logan Intl

26h 10m1 stop Los Angeles

$2,156Qantas Airways

Fri, 13 Nov - Fri, 27 Nov

15:41 - 09:20BOS Boston Logan Intl-SYD Sydney Kingsford Smith

25h 39m2 stops Newark San Francisco

09:15 - 14:21SYD Sydney Kingsford Smith-BOS Boston Logan Intl

21h 06m1 stop Houston George Bush Intcntl

$2,165United Airlines

Fri, 13 Nov - Fri, 27 Nov

15:31 - 09:00BOS Boston Logan Intl-SYD Sydney Kingsford Smith

25h 29m2 stops Dallas/Fort Worth Los Angeles

14:05 - 21:35SYD Sydney Kingsford Smith-BOS Boston Logan Intl

23h 30m2 stops Dallas/Fort Worth Philadelphia

$2,166American Airlines

Fri, 13 Nov - Fri, 27 Nov

07:13 - 06:25BOS Boston Logan Intl-SYD Sydney Kingsford Smith

31h 12m2 stops Seattle/Tacoma Intl Los Angeles

08:45 - 22:00SYD Sydney Kingsford Smith-BOS Boston Logan Intl

29h 15m1 stop Hong Kong Intl

$2,186Multiple Airlines

Sat, 14 Nov - Fri, 20 Nov

18:45 - 06:25BOS Boston Logan Intl-SYD Sydney Kingsford Smith

43h 40m1 stop Los Angeles

22:20 - 22:00SYD Sydney Kingsford Smith-BOS Boston Logan Intl

39h 40m1 stop Hong Kong Intl

$2,211Multiple Airlines

Sat, 14 Nov - Fri, 20 Nov

14:25 - 09:00BOS Boston Logan Intl-SYD Sydney Kingsford Smith

26h 35m1 stop Los Angeles

11:05 - 22:00SYD Sydney Kingsford Smith-BOS Boston Logan Intl

26h 55m1 stop Hong Kong Intl

$2,256Multiple Airlines

Fri, 13 Nov - Tue, 17 Nov

06:01 - 06:50BOS Boston Logan Intl-SYD Sydney Kingsford Smith

32h 49m2 stops New York John F Kennedy Intl Doha Hamad Intl

15:50 - 13:55SYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 05m1 stop Doha Hamad Intl

$2,284Qatar Airways

Fri, 13 Nov - Tue, 17 Nov

13:32 - 07:00BOS Boston Logan Intl-SYD Sydney Kingsford Smith

25h 28m1 stop Houston George Bush Intcntl

09:15 - 12:25SYD Sydney Kingsford Smith-BOS Boston Logan Intl

43h 10m1 stop Houston George Bush Intcntl

$2,676United Airlines

Wed, 11 Nov - Sun, 29 Nov

11:55 - 09:05BOS Boston Logan Intl-SYD Sydney Kingsford Smith

29h 10m2 stops Chicago O'Hare Intl Los Angeles

11:20 - 21:54SYD Sydney Kingsford Smith-BOS Boston Logan Intl

26h 34m2 stops Los Angeles Denver Intl

$2,878United Airlines

Wed, 11 Nov - Sun, 29 Nov

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JetBlue flights from Boston to Sydney

Our best JetBlue deals on Boston to Sydney flight tickets

JetBlue

25 Jan

BOS20:40Boston Logan Intl

30h 40m

1 stop

SYD19:20Sydney Kingsford Smith

28 Feb

SYD21:10Sydney Kingsford Smith

32h 45m

1 stop

BOS13:55Boston Logan Intl

$1,892

JetBlue

25 Jan

BOS20:40Boston Logan Intl

30h 40m

1 stop

SYD19:20Sydney Kingsford Smith

2 Mar

SYD21:10Sydney Kingsford Smith

32h 45m

1 stop

BOS13:55Boston Logan Intl

$1,922

JetBlue

25 Jan

BOS20:40Boston Logan Intl

30h 40m

1 stop

SYD19:20Sydney Kingsford Smith

2 Mar

SYD21:10Sydney Kingsford Smith

32h 45m

1 stop

BOS13:55Boston Logan Intl

$1,981

Qantas Airways flights from Boston to Sydney

Our best Qantas Airways deals on Boston to Sydney flight tickets

Qantas Airways

3 Dec

BOS14:20Boston Logan Intl

26h 40m

1 stop

SYD09:00Sydney Kingsford Smith

9 Dec

SYD19:15Sydney Kingsford Smith

42h 12m

2 stops

BOS21:27Boston Logan Intl

$1,910

Qantas Airways

22 Dec

BOS19:00Boston Logan Intl

46h 00m

1 stop

SYD09:00Sydney Kingsford Smith

27 Jan

SYD07:05Sydney Kingsford Smith

30h 55m

2 stops

BOS22:00Boston Logan Intl

$1,954

Qantas Airways

24 Nov

BOS08:05Boston Logan Intl

32h 55m

1 stop

SYD09:00Sydney Kingsford Smith

1 Dec

SYD14:05Sydney Kingsford Smith

22h 32m

1 stop

BOS20:37Boston Logan Intl

$1,987

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sun 21/2

20:40-18:20

1 stop29h 40m

Sydney Kingsford Smith

Sun 7/3

15:50-13:55

1 stop38h 05m

$1,888

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Fri 22/1

20:40-19:20

1 stop30h 40m

Sydney Kingsford Smith

Thu 4/3

15:50-13:55

1 stop38h 05m

$1,891

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sun 14/2

20:40-18:20

1 stop29h 40m

Sydney Kingsford Smith

Sat 27/2

22:10-14:15

1 stop32h 05m

$1,892

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Wed 17/2

20:40-18:20

1 stop29h 40m

Sydney Kingsford Smith

Sat 27/2

22:10-14:15

1 stop32h 05m

$1,892

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Thu 3/12

14:20-09:00

1 stop26h 40m

Sydney Kingsford Smith

Wed 9/12

19:15-21:27

2 stops42h 12m

$1,910

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 22/12

19:00-09:00

1 stop46h 00m

Sydney Kingsford Smith

Wed 27/1

07:05-22:00

2 stops30h 55m

$1,954

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 24/11

08:05-09:00

1 stop32h 55m

Sydney Kingsford Smith

Tue 1/12

14:05-20:37

1 stop22h 32m

$1,987

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 24/11

08:20-09:20

1 stop33h 00m

Sydney Kingsford Smith

Tue 1/12

11:50-23:59

2 stops28h 09m

$2,020

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 24/11

05:30-09:05

2 stops35h 35m

Sydney Kingsford Smith

Tue 1/12

11:50-23:59

2 stops28h 09m

$2,020

Fastest return journey

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 1/12

18:01-09:20

1 stop23h 19m

Sydney Kingsford Smith

Wed 9/12

11:50-23:59

2 stops28h 09m

$2,063

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Boston to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between Boston and Sydney?

Prices are currently low for flights on this route.

Typical prices usually range from $1,974 to $2,537.
The lowest price recently found on this route was $1,888.

What is the cheapest month to fly to Sydney?

The month of May is, on average, the cheapest month to fly to Sydney from Boston, with most prices found around $1,834. If you aren’t able to travel to Sydney during the month of May, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $1,839.

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

You are more likely to see cheaper flights to Sydney from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $2,071 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Boston for as low as $1,983 on momondo.

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 7% on your flight if you consider stops on a Boston to Sydney flight.

How have Boston to Sydney flight prices changed over time?

As of November 2026, prices for Boston to Sydney flights are approximately 4% more expensive when compared to flights at the same time last year.

When to book flights from Boston to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Sydney according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Boston to Sydney (BOS to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Sydney

Best price found	$790
Fastest flight time	23h 32m
Direct flights	None

The best one-way flight to Sydney from Boston in the past 72 hours is $790. The best return flight deal from Boston to Sydney found on momondo in the last 72 hours is $1,888.

The fastest flight from Boston to Sydney takes 23h 32m

There are no direct flights from Boston to Sydney. There are no popular flight routes from Boston to Sydney.

Search flight deals

Frequently asked questions about flying from Boston to Sydney

How far is Boston Logan Intl to Sydney Kingsford Smith by plane?
The straight-line distance from Boston Logan Intl to Sydney Kingsford Smith is 16229.2 km. Typically, this will take 23h 32m by plane in normal conditions.
When did momondo last update prices for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?
Prices for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport refresh daily.
How many operators does momondo search for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?
There are 2 operators available for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport as of November 2026.
How old do you have to be to fly from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Boston to Sydney?
Based on momondo bookings for flights between Boston and Sydney, the leading airline is Qantas Airways, making up 64% of the total bookings. Other popular airlines include United Airlines with 36%.

Best airlines flying from Boston to Sydney

Compare and see reviews for airlines that fly from Boston to Sydney with momondo

Airline	Rating	Free cancellation	Price
Qantas Airways	PriceFrom $1,768	Free cancellation	Rating 7.5 1,123 reviews		Search Qantas Airways flights
United Airlines	PriceFrom $1,798	Free cancellation	Rating 7.3 10,477 reviews		Search United Airlines flights

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Why use momondo?

Why should I use momondo to find a flight deal from Boston to Sydney?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Sydney from Boston.

Can I find flights from Boston to Sydney with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sydney from Boston with this policy.

How can momondo help me find flights from Boston to Sydney?

Once you have performed a search for Boston to Sydney flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Boston to Sydney right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Sydney, momondo offers a useful price alert feature which will track prices for flights to Sydney from Boston and alert you when they change.