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

Qantas Airways is the most popular carrier 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 July 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.

$741 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 $2,016 to $2,399. The lowest price recently found on this route was $1,701.

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.

16:59 - 07:05

BOS

SYD

24h 06m

1 stop

12:00 - 19:43

SYD

BOS

21h 43m

1 stop

$1,701Qantas Airways

Sat, 15 Aug - Sun, 30 Aug

16:27 - 06:55

BOS

SYD

24h 28m

1 stop

09:10 - 19:42

SYD

BOS

24h 32m

2 stops

$1,702American Airlines

Wed, 12 Aug - Mon, 24 Aug

17:53 - 06:55

BOS

SYD

23h 02m

1 stop

09:10 - 23:44

SYD

BOS

28h 34m

1 stop

$1,704American Airlines

Wed, 29 Jul - Wed, 5 Aug

17:33 - 07:30

BOS

SYD

23h 57m

1 stop

09:10 - 23:44

SYD

BOS

28h 34m

1 stop

$1,705American Airlines

Sun, 2 Aug - Sun, 16 Aug

15:13 - 06:55

BOS

SYD

25h 42m

2 stops

10:20 - 19:28

SYD

BOS

23h 08m

2 stops

$1,707United Airlines

Wed, 29 Jul - Wed, 5 Aug

18:26 - 07:00

BOS

SYD

22h 34m

1 stop

09:30 - 21:59

SYD

BOS

26h 29m

2 stops

$1,710United Airlines

Wed, 29 Jul - Wed, 16 Sep

20:30 - 06:50

BOS

SYD

44h 20m

1 stop

09:15 - 19:25

SYD

BOS

24h 10m

1 stop

$1,711Delta

Mon, 27 Jul - Mon, 10 Aug

10:30 - 07:30

BOS

SYD

31h 00m

1 stop

09:10 - 23:44

SYD

BOS

28h 34m

1 stop

$1,714American Airlines

Tue, 28 Jul - Tue, 11 Aug

10:30 - 07:05

BOS

SYD

30h 35m

1 stop

09:10 - 23:28

SYD

BOS

28h 18m

1 stop

$1,716Qantas Airways

Tue, 18 Aug - Wed, 23 Sep

09:07 - 06:55

BOS

SYD

31h 48m

1 stop

10:20 - 23:59

SYD

BOS

27h 39m

2 stops

$1,720United Airlines

Tue, 28 Jul - Tue, 11 Aug

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United Airlines flights from Boston to Sydney

Our best United Airlines deals on Boston to Sydney flight tickets

United Airlines

29 July

BOS18:26Boston Logan Intl

22h 34m

1 stop

SYD07:00Sydney Kingsford Smith

16 Sept

SYD09:30Sydney Kingsford Smith

26h 29m

2 stops

BOS21:59Boston Logan Intl

$1,710

United Airlines

27 July

BOS16:15Boston Logan Intl

24h 40m

1 stop

SYD06:55Sydney Kingsford Smith

10 Aug

SYD10:20Sydney Kingsford Smith

22h 54m

2 stops

BOS19:14Boston Logan Intl

$1,711

United Airlines

28 July

BOS09:07Boston Logan Intl

31h 48m

1 stop

SYD06:55Sydney Kingsford Smith

11 Aug

SYD10:20Sydney Kingsford Smith

27h 39m

2 stops

BOS23:59Boston Logan Intl

$1,720

Qantas Airways flights from Boston to Sydney

Our best Qantas Airways deals on Boston to Sydney flight tickets

Qantas Airways

15 Aug

BOS16:59Boston Logan Intl

24h 06m

1 stop

SYD07:05Sydney Kingsford Smith

30 Aug

SYD12:00Sydney Kingsford Smith

21h 43m

1 stop

BOS19:43Boston Logan Intl

$1,701

Qantas Airways

18 Aug

BOS10:30Boston Logan Intl

30h 35m

1 stop

SYD07:05Sydney Kingsford Smith

23 Sept

SYD09:10Sydney Kingsford Smith

28h 18m

1 stop

BOS23:28Boston Logan Intl

$1,716

Qantas Airways

24 Aug

BOS07:00Boston Logan Intl

34h 30m

1 stop

SYD07:30Sydney Kingsford Smith

7 Sept

SYD09:10Sydney Kingsford Smith

36h 26m

1 stop

BOS07:36Boston Logan Intl

$1,742

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 15/8

16:59-07:05

1 stop24h 06m

Sydney Kingsford Smith

Sun 30/8

12:00-19:43

1 stop21h 43m

$1,701

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 12/8

16:27-06:55

1 stop24h 28m

Sydney Kingsford Smith

Mon 24/8

09:10-19:42

2 stops24h 32m

$1,702

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 29/7

17:53-06:55

1 stop23h 02m

Sydney Kingsford Smith

Wed 5/8

09:10-23:44

1 stop28h 34m

$1,704

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 2/8

17:33-07:30

1 stop23h 57m

Sydney Kingsford Smith

Sun 16/8

09:10-23:44

1 stop28h 34m

$1,705

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 29/7

15:13-06:55

2 stops25h 42m

Sydney Kingsford Smith

Wed 5/8

10:20-19:28

2 stops23h 08m

$1,707

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 29/7

18:26-07:00

1 stop22h 34m

Sydney Kingsford Smith

Wed 16/9

09:30-21:59

2 stops26h 29m

$1,710

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 27/7

20:30-06:50

1 stop44h 20m

Sydney Kingsford Smith

Mon 10/8

09:15-19:25

1 stop24h 10m

$1,711

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 28/7

10:30-07:30

1 stop31h 00m

Sydney Kingsford Smith

Tue 11/8

09:10-23:44

1 stop28h 34m

$1,714

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 18/8

10:30-07:05

1 stop30h 35m

Sydney Kingsford Smith

Wed 23/9

09:10-23:28

1 stop28h 18m

$1,716

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 28/7

09:07-06:55

1 stop31h 48m

Sydney Kingsford Smith

Tue 11/8

10:20-23:59

2 stops27h 39m

$1,720

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 $1,769. 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 $1,882.

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 $2,133 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 $2,065 on momondo.

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 27% 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 July 2026, prices for Boston to Sydney flights are approximately 72% 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	23h 00m
Direct flights	None

The fastest flight from Boston to Sydney takes 23h 00m

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 00m 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 July 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 $1,655	Free cancellation	Rating 7.5 1,054 reviews		Search Qantas Airways flights
United Airlines	PriceFrom $1,689	Free cancellation	Rating 7.4 9,924 reviews		Search United Airlines flights

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Katoomba

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Coogee

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Lithgow

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.