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

Qantas Airways, American Airlines, and Delta 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 May 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.

$970 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 $2,155 to $1,652. The lowest price recently found on this route was $1,591.

1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

15:54 - 07:00

BOS

SYD

25h 06m

2 stops

09:30 - 21:59

SYD

BOS

26h 29m

2 stops

$1,591United Airlines

Sun, 24 May - Sun, 7 Jun

16:06 - 07:05

BOS

SYD

24h 59m

2 stops

12:00 - 22:13

SYD

BOS

24h 13m

1 stop

$1,593American Airlines

Sun, 24 May - Sun, 7 Jun

15:54 - 07:00

BOS

SYD

25h 06m

2 stops

09:30 - 21:59

SYD

BOS

26h 29m

2 stops

$1,599United Airlines

Sun, 24 May - Sun, 7 Jun

18:00 - 07:30

BOS

SYD

23h 30m

1 stop

09:10 - 20:38

SYD

BOS

25h 28m

1 stop

$1,600American Airlines

Mon, 1 Jun - Mon, 15 Jun

10:30 - 08:05

BOS

SYD

30h 35m

1 stop

07:05 - 17:18

SYD

BOS

25h 13m

2 stops

$1,603Qantas Airways

Mon, 12 Oct - Tue, 27 Oct

09:07 - 06:55

BOS

SYD

31h 48m

1 stop

10:20 - 17:04

SYD

BOS

20h 44m

1 stop

$1,605Air New Zealand

Sun, 7 Jun - Tue, 16 Jun

18:10 - 06:55

BOS

SYD

22h 45m

1 stop

10:20 - 17:04

SYD

BOS

20h 44m

1 stop

$1,606United Airlines

Mon, 8 Jun - Mon, 15 Jun

17:05 - 07:05

BOS

SYD

24h 00m

2 stops

09:10 - 19:20

SYD

BOS

24h 10m

2 stops

$1,607American Airlines

Tue, 9 Jun - Tue, 16 Jun

15:54 - 07:00

BOS

SYD

25h 06m

2 stops

10:20 - 17:04

SYD

BOS

20h 44m

1 stop

$1,611Air New Zealand

Sun, 7 Jun - Tue, 16 Jun

15:54 - 07:00

BOS

SYD

25h 06m

2 stops

10:20 - 19:14

SYD

BOS

22h 54m

2 stops

$1,613United Airlines

Sun, 7 Jun - Tue, 16 Jun

Air New Zealand flights from Boston to Sydney

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

Air New Zealand

7 June

BOS09:07Boston Logan Intl

31h 48m

1 stop

SYD06:55Sydney Kingsford Smith

16 June

SYD10:20Sydney Kingsford Smith

20h 44m

1 stop

BOS17:04Boston Logan Intl

$1,605

Air New Zealand

7 June

BOS15:54Boston Logan Intl

25h 06m

2 stops

SYD07:00Sydney Kingsford Smith

16 June

SYD10:20Sydney Kingsford Smith

20h 44m

1 stop

BOS17:04Boston Logan Intl

$1,611

Air New Zealand

31 May

BOS16:15Boston Logan Intl

24h 40m

1 stop

SYD06:55Sydney Kingsford Smith

20 June

SYD09:30Sydney Kingsford Smith

21h 50m

1 stop

BOS17:20Boston Logan Intl

$1,674

American Airlines flights from Boston to Sydney

Our best American Airlines deals on Boston to Sydney flight tickets

American Airlines

24 May

BOS18:00Boston Logan Intl

23h 30m

1 stop

SYD07:30Sydney Kingsford Smith

7 June

SYD09:10Sydney Kingsford Smith

35h 25m

1 stop

BOS06:35Boston Logan Intl

$1,585

American Airlines

24 May

BOS16:06Boston Logan Intl

24h 59m

2 stops

SYD07:05Sydney Kingsford Smith

7 June

SYD12:00Sydney Kingsford Smith

24h 13m

1 stop

BOS22:13Boston Logan Intl

$1,593

American Airlines

1 June

BOS18:00Boston Logan Intl

23h 30m

1 stop

SYD07:30Sydney Kingsford Smith

15 June

SYD09:10Sydney Kingsford Smith

25h 28m

1 stop

BOS20:38Boston Logan Intl

$1,600

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 24/5

15:54-07:00

2 stops25h 06m

Sydney Kingsford Smith

Sun 7/6

09:30-21:59

2 stops26h 29m

$1,591

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 24/5

16:06-07:05

2 stops24h 59m

Sydney Kingsford Smith

Sun 7/6

12:00-22:13

1 stop24h 13m

$1,593

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 24/5

15:54-07:00

2 stops25h 06m

Sydney Kingsford Smith

Sun 7/6

09:30-21:59

2 stops26h 29m

$1,599

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 1/6

18:00-07:30

1 stop23h 30m

Sydney Kingsford Smith

Mon 15/6

09:10-20:38

1 stop25h 28m

$1,600

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 12/10

10:30-08:05

1 stop30h 35m

Sydney Kingsford Smith

Tue 27/10

07:05-17:18

2 stops25h 13m

$1,603

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 7/6

09:07-06:55

1 stop31h 48m

Sydney Kingsford Smith

Tue 16/6

10:20-17:04

1 stop20h 44m

$1,605

Fastest return journey

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 8/6

18:10-06:55

1 stop22h 45m

Sydney Kingsford Smith

Mon 15/6

10:20-17:04

1 stop20h 44m

$1,606

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 9/6

17:05-07:05

2 stops24h 00m

Sydney Kingsford Smith

Tue 16/6

09:10-19:20

2 stops24h 10m

$1,607

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 7/6

15:54-07:00

2 stops25h 06m

Sydney Kingsford Smith

Tue 16/6

10:20-17:04

1 stop20h 44m

$1,611

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 7/6

15:54-07:00

2 stops25h 06m

Sydney Kingsford Smith

Tue 16/6

10:20-19:14

2 stops22h 54m

$1,613

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 $1,668. 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 $1,788.

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 $1,812 on momondo.

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 12% 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 May 2026, prices for Boston to Sydney flights are approximately 44% 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 34m
Direct flights	None

The fastest flight from Boston to Sydney takes 22h 34m

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 34m 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 May 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 56% of the total bookings. Other popular airlines include United Airlines with 44%.

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 $1,358	Free cancellation	Rating 7.5 1,037 reviews		Search Qantas Airways flights
United Airlines	PriceFrom $1,611	Free cancellation	Rating 7.4 9,711 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.