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

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 June 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.

$883 Cheap Flights from Boston to Sydney in 2026

Q: 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 $2,371 to $1,799. The lowest price recently found on this route was $1,718.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boston to Sydney

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

10:40 - 07:20

BOS

SYD

30h 40m

2 stops

09:20 - 21:27

SYD

BOS

26h 07m

2 stops

$1,718Air Canada

Sun, 9 Aug - Sun, 16 Aug

10:40 - 07:20

BOS

SYD

30h 40m

3 stops

09:20 - 21:27

SYD

BOS

26h 07m

2 stops

$1,729Air Canada

Sun, 9 Aug - Sun, 16 Aug

19:15 - 07:20

BOS

SYD

46h 05m

2 stops

09:20 - 09:50

SYD

BOS

38h 30m

2 stops

$1,736Air Canada

Sat, 8 Aug - Sun, 30 Aug

19:15 - 07:20

BOS

SYD

46h 05m

2 stops

09:20 - 14:41

SYD

BOS

43h 21m

2 stops

$1,738Air Canada

Sat, 8 Aug - Sun, 30 Aug

19:15 - 07:20

BOS

SYD

46h 05m

2 stops

09:20 - 18:07

SYD

BOS

46h 47m

2 stops

$1,739Air Canada

Sat, 15 Aug - Sun, 30 Aug

06:00 - 07:20

BOS

SYD

35h 20m

1 stop

09:20 - 09:50

SYD

BOS

38h 30m

2 stops

$1,749Multiple Airlines

Sun, 9 Aug - Sun, 16 Aug

21:05 - 06:50

BOS

SYD

41h 45m

1 stop

15:50 - 14:20

SYD

BOS

38h 30m

1 stop

$1,755Qatar Airways

Tue, 3 Nov - Tue, 17 Nov

21:05 - 06:50

BOS

SYD

41h 45m

1 stop

15:50 - 14:20

SYD

BOS

38h 30m

1 stop

$1,756Qatar Airways

Tue, 3 Nov - Tue, 17 Nov

10:30 - 07:05

BOS

SYD

30h 35m

1 stop

07:05 - 17:35

SYD

BOS

26h 30m

2 stops

$1,759Qantas Airways

Sat, 8 Aug - Sat, 12 Dec

22:00 - 17:10

BOS

SYD

29h 10m

1 stop

15:50 - 15:15

SYD

BOS

38h 25m

1 stop

$1,761Qatar Airways

Wed, 16 Sep - Thu, 8 Oct

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Air Canada flights from Boston to Sydney

Our best Air Canada deals on Boston to Sydney flight tickets

Air Canada

9 Aug

BOS10:40Boston Logan Intl

30h 40m

2 stops

SYD07:20Sydney Kingsford Smith

16 Aug

SYD09:20Sydney Kingsford Smith

26h 07m

2 stops

BOS21:27Boston Logan Intl

$1,718

Air Canada

9 Aug

BOS10:40Boston Logan Intl

30h 40m

3 stops

SYD07:20Sydney Kingsford Smith

16 Aug

SYD09:20Sydney Kingsford Smith

26h 07m

2 stops

BOS21:27Boston Logan Intl

$1,729

Air Canada

8 Aug

BOS19:15Boston Logan Intl

46h 05m

2 stops

SYD07:20Sydney Kingsford Smith

30 Aug

SYD09:20Sydney Kingsford Smith

38h 30m

2 stops

BOS09:50Boston Logan Intl

$1,736

Qatar Airways flights from Boston to Sydney

Our best Qatar Airways deals on Boston to Sydney flight tickets

Qatar Airways

3 Nov

BOS21:05Boston Logan Intl

41h 45m

1 stop

SYD06:50Sydney Kingsford Smith

17 Nov

SYD15:50Sydney Kingsford Smith

38h 30m

1 stop

BOS14:20Boston Logan Intl

$1,755

Qatar Airways

3 Nov

BOS21:05Boston Logan Intl

41h 45m

1 stop

SYD06:50Sydney Kingsford Smith

17 Nov

SYD15:50Sydney Kingsford Smith

38h 30m

1 stop

BOS14:20Boston Logan Intl

$1,756

Qatar Airways

16 Sept

BOS22:00Boston Logan Intl

29h 10m

1 stop

SYD17:10Sydney Kingsford Smith

7 Oct

SYD15:50Sydney Kingsford Smith

38h 25m

1 stop

BOS15:15Boston Logan Intl

$1,761

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 9/8

10:40-07:20

2 stops30h 40m

Sydney Kingsford Smith

Sun 16/8

09:20-21:27

2 stops26h 07m

$1,718

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 9/8

10:40-07:20

3 stops30h 40m

Sydney Kingsford Smith

Sun 16/8

09:20-21:27

2 stops26h 07m

$1,729

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 8/8

19:15-07:20

2 stops46h 05m

Sydney Kingsford Smith

Sun 30/8

09:20-09:50

2 stops38h 30m

$1,736

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 8/8

19:15-07:20

2 stops46h 05m

Sydney Kingsford Smith

Sun 30/8

09:20-14:41

2 stops43h 21m

$1,738

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 15/8

19:15-07:20

2 stops46h 05m

Sydney Kingsford Smith

Sun 30/8

09:20-18:07

2 stops46h 47m

$1,739

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 9/8

06:00-07:20

1 stop35h 20m

Sydney Kingsford Smith

Sun 16/8

09:20-09:50

2 stops38h 30m

$1,749

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 3/11

21:05-06:50

1 stop41h 45m

Sydney Kingsford Smith

Tue 17/11

15:50-14:20

1 stop38h 30m

$1,755

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 3/11

21:05-06:50

1 stop41h 45m

Sydney Kingsford Smith

Tue 17/11

15:50-14:20

1 stop38h 30m

$1,756

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 8/8

10:30-07:05

1 stop30h 35m

Sydney Kingsford Smith

Sat 12/12

07:05-17:35

2 stops26h 30m

$1,759

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 16/9

22:00-17:10

1 stop29h 10m

Sydney Kingsford Smith

Thu 8/10

15:50-15:15

1 stop38h 25m

$1,761

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?

What is the cheapest month to fly to Sydney?

The month of September is, on average, the cheapest month to fly to Sydney from Boston, with most prices found around $1,698. If you aren’t able to travel to Sydney during the month of September, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $1,853.

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 $2,093 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 $1,890 on momondo.

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 11% 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 June 2026, prices for Boston to Sydney flights are approximately 39% 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

Fastest flight time	22h 35m
Direct flights	None

The fastest flight from Boston to Sydney takes 22h 35m

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 22h 35m 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 June 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 62% of the total bookings. Other popular airlines include United Airlines with 38%.

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 $1,621	Free cancellation	Rating 7.5 1,046 reviews		Search Qantas Airways flights
United Airlines	PriceFrom $1,653	Free cancellation	Rating 7.4 9,801 reviews		Search United Airlines flights

Parramatta

Wollongong

Terrigal

Penrith

Katoomba

Lithgow

Manly

Coogee

Leura

Bondi Beach

Cronulla

Randwick

Charlestown

Newport

Swansea

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.