Which airlines fly to Sydney?

Qantas Airways, United Airlines and American Airlines are the top three most popular airlines that fly to Sydney from Boston according to our data. Qantas Airways is the first choice among our users, with 36% of people opting to fly with this airline when travelling to Sydney. Keep in mind that there are 3 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

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

Qantas Airways, American Airlines, and United Airlines 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 3 operators available for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport as of August 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.

$928 Cheap Flights from Boston to Sydney in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boston to Sydney

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One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

15:30 - 08:35BOS Boston Logan Intl-SYD Sydney Kingsford Smith

26h 05m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

10:20 - 21:28SYD Sydney Kingsford Smith-BOS Boston Logan Intl

26h 08m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,495Air Canada

Sun, 25 Oct - Thu, 29 Oct

10:35 - 08:35BOS Boston Logan Intl-SYD Sydney Kingsford Smith

31h 00m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

10:20 - 09:58SYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 38m3 stops Vancouver Intl Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

$1,505Air Canada

Sun, 25 Oct - Thu, 29 Oct

10:40 - 08:20BOS Boston Logan Intl-SYD Sydney Kingsford Smith

30h 40m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

10:20 - 21:26SYD Sydney Kingsford Smith-BOS Boston Logan Intl

26h 06m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,529Air Canada

Wed, 14 Oct - Wed, 21 Oct

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

27h 35m1 stop Los Angeles

11:20 - 16:29SYD Sydney Kingsford Smith-BOS Boston Logan Intl

21h 09m1 stop Los Angeles

$1,794Qantas Airways

Tue, 27 Oct - Tue, 10 Nov

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

27h 35m1 stop Los Angeles

11:10 - 16:25SYD Sydney Kingsford Smith-BOS Boston Logan Intl

21h 15m1 stop Los Angeles

$1,794Qantas Airways

Tue, 27 Oct - Tue, 24 Nov

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

27h 35m1 stop Los Angeles

11:10 - 16:29SYD Sydney Kingsford Smith-BOS Boston Logan Intl

21h 19m1 stop Los Angeles

$1,794Qantas Airways

Mon, 26 Oct - Mon, 2 Nov

07:45 - 07:55BOS Boston Logan Intl-SYD Sydney Kingsford Smith

33h 10m1 stop San Francisco

11:20 - 19:44SYD Sydney Kingsford Smith-BOS Boston Logan Intl

23h 24m1 stop San Francisco

$1,818United Airlines

Tue, 6 Oct - Sun, 18 Oct

07:45 - 07:55BOS Boston Logan Intl-SYD Sydney Kingsford Smith

33h 10m1 stop San Francisco

10:30 - 21:49SYD Sydney Kingsford Smith-BOS Boston Logan Intl

26h 19m2 stops Los Angeles Denver Intl

$1,818United Airlines

Tue, 6 Oct - Sun, 18 Oct

11:00 - 07:30BOS Boston Logan Intl-SYD Sydney Kingsford Smith

29h 30m1 stop Los Angeles

10:10 - 16:39SYD Sydney Kingsford Smith-BOS Boston Logan Intl

21h 29m1 stop Los Angeles

$1,824American Airlines

Wed, 14 Oct - Wed, 21 Oct

10:45 - 09:00BOS Boston Logan Intl-SYD Sydney Kingsford Smith

30h 15m1 stop Los Angeles

11:15 - 16:36SYD Sydney Kingsford Smith-BOS Boston Logan Intl

21h 21m1 stop Los Angeles

$1,824American Airlines

Mon, 2 Nov - Mon, 30 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

15:45 - 07:00BOS Boston Logan Intl-SYD Sydney Kingsford Smith

25h 15m2 stops Houston George Bush Intcntl Los Angeles

09:30 - 17:20SYD Sydney Kingsford Smith-BOS Boston Logan Intl

21h 50m1 stop Los Angeles

$1,731United Airlines

Wed, 26 Aug - Wed, 2 Sep

18:13 - 06:55BOS Boston Logan Intl-SYD Sydney Kingsford Smith

22h 42m1 stop San Francisco

10:20 - 22:59SYD Sydney Kingsford Smith-BOS Boston Logan Intl

26h 39m1 stop San Francisco

$1,731United Airlines

Sun, 30 Aug - Mon, 14 Sep

08:15 - 07:00BOS Boston Logan Intl-SYD Sydney Kingsford Smith

32h 45m1 stop Los Angeles

09:30 - 21:02SYD Sydney Kingsford Smith-BOS Boston Logan Intl

25h 32m2 stops Los Angeles San Francisco

$1,731United Airlines

Wed, 26 Aug - Mon, 7 Sep

09:00 - 19:10BOS Boston Logan Intl-SYD Sydney Kingsford Smith

44h 10m2 stops Chicago O'Hare Intl Tokyo Haneda

20:55 - 19:19SYD Sydney Kingsford Smith-BOS Boston Logan Intl

36h 24m2 stops Tokyo Haneda Washington, D.C. Dulles Intl

$1,895ANA

Wed, 26 Aug - Mon, 7 Sep

10:30 - 07:05BOS Boston Logan Intl-SYD Sydney Kingsford Smith

30h 35m1 stop Los Angeles

06:25 - 23:44SYD Sydney Kingsford Smith-BOS Boston Logan Intl

31h 19m2 stops Melbourne Los Angeles

$1,898Qantas Airways

Wed, 26 Aug - Sat, 5 Sep

10:30 - 07:05BOS Boston Logan Intl-SYD Sydney Kingsford Smith

30h 35m1 stop Los Angeles

06:25 - 23:44SYD Sydney Kingsford Smith-BOS Boston Logan Intl

31h 19m2 stops Melbourne Los Angeles

$1,899Qantas Airways

Wed, 26 Aug - Sat, 5 Sep

09:30 - 19:10BOS Boston Logan Intl-SYD Sydney Kingsford Smith

43h 40m2 stops Washington, D.C. Dulles Intl Tokyo Haneda

11:45 - 16:27SYD Sydney Kingsford Smith-BOS Boston Logan Intl

42h 42m2 stops Tokyo Haneda Chicago O'Hare Intl

$1,944ANA

Wed, 26 Aug - Sat, 5 Sep

09:30 - 19:10BOS Boston Logan Intl-SYD Sydney Kingsford Smith

43h 40m2 stops Washington, D.C. Dulles Intl Tokyo Haneda

20:55 - 19:19SYD Sydney Kingsford Smith-BOS Boston Logan Intl

36h 24m2 stops Tokyo Haneda Washington, D.C. Dulles Intl

$1,944ANA

Wed, 26 Aug - Mon, 7 Sep

16:59 - 07:05BOS Boston Logan Intl-SYD Sydney Kingsford Smith

24h 06m1 stop Los Angeles

09:10 - 21:00SYD Sydney Kingsford Smith-BOS Boston Logan Intl

25h 50m2 stops Los Angeles Chicago O'Hare Intl

$21,079American Airlines

Thu, 27 Aug - Sat, 5 Sep

16:59 - 07:05BOS Boston Logan Intl-SYD Sydney Kingsford Smith

24h 06m1 stop Los Angeles

09:10 - 16:44SYD Sydney Kingsford Smith-BOS Boston Logan Intl

21h 34m1 stop Los Angeles

$24,437American Airlines

Thu, 27 Aug - Sat, 5 Sep

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Air New Zealand flights from Boston to Sydney

Our best Air New Zealand deals on Boston to Sydney flight tickets

Air New Zealand

24 Oct

BOS16:55Boston Logan Intl

48h 40m

1 stop

SYD08:35Sydney Kingsford Smith

1 Nov

SYD11:20Sydney Kingsford Smith

38h 38m

2 stops

BOS10:58Boston Logan Intl

$1,677

Air New Zealand

1 Sept

BOS08:15Boston Logan Intl

34h 30m

2 stops

SYD08:45Sydney Kingsford Smith

30 Sept

SYD10:20Sydney Kingsford Smith

23h 24m

1 stop

BOS19:44Boston Logan Intl

$2,262

Air Canada flights from Boston to Sydney

Our best Air Canada deals on Boston to Sydney flight tickets

Air Canada

25 Oct

BOS15:30Boston Logan Intl

26h 05m

2 stops

SYD08:35Sydney Kingsford Smith

29 Oct

SYD10:20Sydney Kingsford Smith

26h 08m

2 stops

BOS21:28Boston Logan Intl

$1,495

Air Canada

25 Oct

BOS10:35Boston Logan Intl

31h 00m

2 stops

SYD08:35Sydney Kingsford Smith

29 Oct

SYD10:20Sydney Kingsford Smith

38h 38m

3 stops

BOS09:58Boston Logan Intl

$1,505

Air Canada

14 Oct

BOS10:40Boston Logan Intl

30h 40m

2 stops

SYD08:20Sydney Kingsford Smith

21 Oct

SYD10:20Sydney Kingsford Smith

26h 06m

2 stops

BOS21:26Boston Logan Intl

$1,529

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 25/10

15:30-08:35

2 stops26h 05m

Sydney Kingsford Smith

Thu 29/10

10:20-21:28

2 stops26h 08m

$1,495

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sun 25/10

10:35-08:35

2 stops31h 00m

Sydney Kingsford Smith

Thu 29/10

10:20-09:58

3 stops38h 38m

$1,505

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Wed 14/10

10:40-08:20

2 stops30h 40m

Sydney Kingsford Smith

Wed 21/10

10:20-21:26

2 stops26h 06m

$1,529

Fastest return journey

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 27/10

14:25-09:00

1 stop27h 35m

Sydney Kingsford Smith

Tue 10/11

11:20-16:29

1 stop21h 09m

$1,794

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 27/10

14:25-09:00

1 stop27h 35m

Sydney Kingsford Smith

Tue 24/11

11:10-16:25

1 stop21h 15m

$1,794

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Mon 26/10

14:25-09:00

1 stop27h 35m

Sydney Kingsford Smith

Mon 2/11

11:10-16:29

1 stop21h 19m

$1,794

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 6/10

07:45-07:55

1 stop33h 10m

Sydney Kingsford Smith

Sun 18/10

11:20-19:44

1 stop23h 24m

$1,818

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 6/10

07:45-07:55

1 stop33h 10m

Sydney Kingsford Smith

Sun 18/10

10:30-21:49

2 stops26h 19m

$1,818

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Wed 14/10

11:00-07:30

1 stop29h 30m

Sydney Kingsford Smith

Wed 21/10

10:10-16:39

1 stop21h 29m

$1,824

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Mon 2/11

10:45-09:00

1 stop30h 15m

Sydney Kingsford Smith

Mon 30/11

11:15-16:36

1 stop21h 21m

$1,824

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 $1,735 to $2,187.
The lowest price recently found on this route was $1,495.

What is the cheapest month to fly to Sydney?

The month of March is, on average, the cheapest month to fly to Sydney from Boston, with most prices found around $1,772. If you aren’t able to travel to Sydney during the month of March, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $1,842.

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 $2,047 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 $1,909 on momondo.

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 26% 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 August 2026, prices for Boston to Sydney flights are approximately 42% cheaper 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	$928
Fastest flight time	25h 15m
Direct flights	None

The best one-way flight to Sydney from Boston in the past 72 hours is $928. The best return flight deal from Boston to Sydney found on momondo in the last 72 hours is $1,495.

The fastest flight from Boston to Sydney takes 25h 15m

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 25h 15m 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 3 operators available for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport as of August 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 36% of the total bookings. Other popular airlines include United Airlines with 33% and American Airlines with 31%.

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 $1,372	Free cancellation	Rating 7.5 1,085 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $1,483	Free cancellation	Rating 7.1 11,994 reviews	Search American Airlines flights
United Airlines	PriceFrom $1,627	Free cancellation	Rating 7.4 10,123 reviews	Search United Airlines flights

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Bondi Beach

Charlestown

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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.