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

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

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 34% 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.

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.

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

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

11:20 - 10:58SYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 38m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,593Air Canada

Sun, 18 Oct - Sun, 1 Nov

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

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

11:20 - 10:58SYD Sydney Kingsford Smith-BOS Boston Logan Intl

38h 38m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,593Air Canada

Sun, 18 Oct - Sun, 1 Nov

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

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

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

38h 38m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,593Air Canada

Wed, 21 Oct - Wed, 28 Oct

06:30 - 07:05BOS Boston Logan Intl-SYD Sydney Kingsford Smith

34h 35m1 stop Los Angeles Los Angeles

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

21h 29m1 stop Los Angeles Los Angeles

$1,731Qantas Airways

Wed, 30 Sep - Wed, 7 Oct

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

30h 35m1 stop Los Angeles Los Angeles

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

21h 29m1 stop Los Angeles Los Angeles

$1,735Qantas Airways

Mon, 28 Sep - Mon, 5 Oct

12:41 - 06:55BOS Boston Logan Intl-SYD Sydney Kingsford Smith

28h 14m2 stops Newark San Francisco

09:30 - 00:49SYD Sydney Kingsford Smith-BOS Boston Logan Intl

29h 19m1 stop Los Angeles Los Angeles

$1,735United Airlines

Sun, 30 Aug - Mon, 14 Sep

11:55 - 06:55BOS Boston Logan Intl-SYD Sydney Kingsford Smith

29h 00m2 stops Denver Intl San Francisco

09:30 - 22:59SYD Sydney Kingsford Smith-BOS Boston Logan Intl

27h 29m2 stops Los Angeles Los Angeles San Francisco

$1,735United Airlines

Sun, 30 Aug - Mon, 14 Sep

10:00 - 06:55BOS Boston Logan Intl-SYD Sydney Kingsford Smith

28h 55m1 stop Dallas/Fort Worth

14:05 - 19:32SYD Sydney Kingsford Smith-BOS Boston Logan Intl

21h 27m1 stop Dallas/Fort Worth

$1,752Qantas Airways

Sun, 1 Nov - Tue, 1 Dec

15:15 - 07:05BOS Boston Logan Intl-SYD Sydney Kingsford Smith

25h 50m2 stops Philadelphia Los Angeles Los Angeles

13:00 - 21:16SYD Sydney Kingsford Smith-BOS Boston Logan Intl

23h 16m1 stop Dallas/Fort Worth

$1,818American Airlines

Mon, 28 Sep - Mon, 5 Oct

14:58 - 07:05BOS Boston Logan Intl-SYD Sydney Kingsford Smith

26h 07m2 stops Chicago O'Hare Intl Los Angeles Los Angeles

10:10 - 19:52SYD Sydney Kingsford Smith-BOS Boston Logan Intl

24h 42m2 stops Los Angeles Los Angeles Dallas/Fort Worth

$1,820American Airlines

Mon, 28 Sep - Mon, 5 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

06:00 - 07:20BOS Boston Logan Intl-SYD Sydney Kingsford Smith

35h 20m2 stops Toronto Pearson Intl Vancouver Intl

09:20 - 22:40SYD Sydney Kingsford Smith-BOS Boston Logan Intl

27h 20m2 stops Vancouver Intl Toronto Pearson Intl

$1,734Air Canada

Sat, 22 Aug - Fri, 2 Oct

05:45 - 07:00BOS Boston Logan Intl-SYD Sydney Kingsford Smith

35h 15m2 stops Washington, D.C. Dulles Intl Los Angeles Los Angeles

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

23h 40m2 stops Los Angeles Los Angeles San Francisco

$1,738United Airlines

Sun, 23 Aug - Sun, 6 Sep

07:45 - 06:55BOS Boston Logan Intl-SYD Sydney Kingsford Smith

33h 10m1 stop San Francisco

09:30 - 23:34SYD Sydney Kingsford Smith-BOS Boston Logan Intl

28h 04m2 stops Los Angeles Los Angeles Chicago O'Hare Intl

$1,738United Airlines

Sun, 23 Aug - Sun, 6 Sep

11:34 - 06:55BOS Boston Logan Intl-SYD Sydney Kingsford Smith

29h 21m1 stop San Francisco

09:30 - 21:29SYD Sydney Kingsford Smith-BOS Boston Logan Intl

25h 59m1 stop Los Angeles Los Angeles

$1,738United Airlines

Sun, 23 Aug - Sun, 6 Sep

08:05 - 09:25BOS Boston Logan Intl-SYD Sydney Kingsford Smith

35h 20m2 stops Chicago O'Hare Intl Tokyo Haneda

20:55 - 14:50SYD Sydney Kingsford Smith-BOS Boston Logan Intl

31h 55m2 stops Tokyo Haneda Washington, D.C. Dulles Intl

$1,906ANA

Sun, 23 Aug - Sun, 30 Aug

08:05 - 09:25BOS Boston Logan Intl-SYD Sydney Kingsford Smith

35h 20m2 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

$1,906ANA

Sun, 23 Aug - Tue, 1 Sep

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

30h 35m1 stop Los Angeles Los Angeles

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

31h 19m2 stops Melbourne Los Angeles Los Angeles

$1,910Qantas Airways

Sun, 23 Aug - Tue, 1 Sep

08:15 - 18:10BOS Boston Logan Intl-SYD Sydney Kingsford Smith

43h 55m2 stops Los Angeles Los Angeles Auckland Intl

06:50 - 17:41SYD Sydney Kingsford Smith-BOS Boston Logan Intl

48h 51m2 stops Auckland Intl Los Angeles Los Angeles

$1,948Air New Zealand

Sun, 23 Aug - Fri, 2 Oct

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

24h 06m1 stop Los Angeles Los Angeles

17:35 - 23:44SYD Sydney Kingsford Smith-BOS Boston Logan Intl

44h 09m2 stops Melbourne Los Angeles Los Angeles

$1,963Qantas Airways

Sun, 23 Aug - Tue, 1 Sep

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

24h 06m1 stop Los Angeles Los Angeles

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

21h 34m1 stop Los Angeles Los Angeles

$2,187Qantas Airways

Wed, 19 Aug - Fri, 21 Aug

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Air Canada flights from Boston to Sydney

Our best Air Canada deals on Boston to Sydney flight tickets

Air Canada

15 Sept

BOS10:40Boston Logan Intl

30h 40m

2 stops

SYD07:20Sydney Kingsford Smith

29 Sept

SYD09:20Sydney Kingsford Smith

38h 30m

2 stops

BOS09:50Boston Logan Intl

$1,593

Air Canada

14 Oct

BOS10:40Boston Logan Intl

30h 40m

2 stops

SYD08:20Sydney Kingsford Smith

21 Oct

SYD10:20Sydney Kingsford Smith

38h 30m

2 stops

BOS09:50Boston Logan Intl

$1,595

Air Canada

1 Feb

BOS11:05Boston Logan Intl

30h 30m

2 stops

SYD09:35Sydney Kingsford Smith

3 Mar

SYD11:20Sydney Kingsford Smith

38h 35m

2 stops

BOS09:55Boston Logan Intl

$1,600

Air New Zealand flights from Boston to Sydney

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

Air New Zealand

8 Nov

BOS11:10Boston Logan Intl

30h 25m

1 stop

SYD09:35Sydney Kingsford Smith

23 Nov

SYD11:20Sydney Kingsford Smith

26h 08m

2 stops

BOS21:28Boston Logan Intl

$1,685

Air New Zealand

20 Nov

BOS05:45Boston Logan Intl

35h 50m

1 stop

SYD09:35Sydney Kingsford Smith

30 Nov

SYD11:20Sydney Kingsford Smith

38h 38m

2 stops

BOS09:58Boston Logan Intl

$1,748

Air New Zealand

7 Nov

BOS11:10Boston Logan Intl

30h 25m

2 stops

SYD09:35Sydney Kingsford Smith

25 Nov

SYD11:20Sydney Kingsford Smith

26h 08m

2 stops

BOS21:28Boston Logan Intl

$1,750

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 18/10

10:40-08:20

2 stops30h 40m

Sydney Kingsford Smith

Sun 1/11

11:20-10:58

2 stops38h 38m

$1,593

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sun 18/10

10:40-08:20

2 stops30h 40m

Sydney Kingsford Smith

Sun 1/11

11:20-10:58

2 stops38h 38m

$1,593

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Wed 21/10

10:40-08:20

2 stops30h 40m

Sydney Kingsford Smith

Wed 28/10

10:20-09:58

2 stops38h 38m

$1,593

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Wed 30/9

06:30-07:05

1 stop34h 35m

Sydney Kingsford Smith

Wed 7/10

10:10-16:39

1 stop21h 29m

$1,731

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Mon 28/9

10:30-07:05

1 stop30h 35m

Sydney Kingsford Smith

Mon 5/10

10:10-16:39

1 stop21h 29m

$1,735

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sun 30/8

12:41-06:55

2 stops28h 14m

Sydney Kingsford Smith

Mon 14/9

09:30-00:49

1 stop29h 19m

$1,735

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sun 30/8

11:55-06:55

2 stops29h 00m

Sydney Kingsford Smith

Mon 14/9

09:30-22:59

2 stops27h 29m

$1,735

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sun 1/11

10:00-06:55

1 stop28h 55m

Sydney Kingsford Smith

Tue 1/12

14:05-19:32

1 stop21h 27m

$1,752

Fastest return journey

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Mon 28/9

15:15-07:05

2 stops25h 50m

Sydney Kingsford Smith

Mon 5/10

13:00-21:16

1 stop23h 16m

$1,818

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Mon 28/9

14:58-07:05

2 stops26h 07m

Sydney Kingsford Smith

Mon 5/10

10:10-19:52

2 stops24h 42m

$1,820

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 $1,778 to $2,306.
The lowest price recently found on this route was $1,593.

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 $1,783. 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 $1,854.

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 $2,054 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 $1,973 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	24h 56m
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 $1,593.

The fastest flight from Boston to Sydney takes 24h 56m

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 24h 56m 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 34% of the total bookings. Other popular airlines include United Airlines with 34% and American Airlines with 32%.

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 $1,381	Free cancellation	Rating 7.5 1,083 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $1,493	Free cancellation	Rating 7.1 11,957 reviews	Search American Airlines flights
United Airlines	PriceFrom $1,638	Free cancellation	Rating 7.4 10,103 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.