Which layover airport offers the lowest fares from Boston to Sydney?

Flights via Dallas (DFW) offer the lowest average round-trip price of $200.

Which layover airport has the shortest connection time from Boston to Sydney?

San Francisco (SFO) has the shortest average layover time for this route: 1h 36m.

What airlines fly to Sydney?

United Airlines, Qantas Airways and Delta are the top three most popular airlines that fly to Sydney from Boston according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 10 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between Boston and Sydney?

Los Angeles (LAX) was the most common stop: 59% of momondo users choosing 1-stop flights on this route connected there.

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

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

Which layover airport has the shortest travel time from Boston to Sydney?

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 8h 56m.

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 were last updated today.

How many operators does momondo search for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

As of November 2025, there are 10 operators available to choose from for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport.

How old do you have to be to fly from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. 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 necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$497 Cheap Flights from Boston to Sydney in 2025/26

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7:37 pm - 9:00 amBOS-SYD

45h 23m1 stop

1:05 pm - 6:54 pmSYD-BOS

20h 49m1 stop

$1,257Qantas Airways

Find Deal

Fri, Mar 6 - Sun, Mar 22

10:35 am - 7:20 amBOS-SYD

30h 45m2 stops

9:10 am - 4:54 pmSYD-BOS

21h 44m1 stop

$1,261Multiple Airlines

Find Deal

Mon, Apr 27 - Thu, Apr 30

4:23 pm - 2:25 pmBOS-SYD

31h 02m2 stops

11:20 am - 6:47 pmSYD-BOS

22h 27m1 stop

$1,262Qantas Airways

Find Deal

Sun, Mar 8 - Sat, Mar 28

4:45 pm - 9:00 amBOS-SYD

24h 15m1 stop

11:20 am - 6:07 amSYD-BOS

34h 47m1 stop

$1,263Qantas Airways

Find Deal

Sat, Feb 14 - Sun, Mar 1

7:15 am - 9:00 amBOS-SYD

33h 45m1 stop

11:20 am - 6:47 pmSYD-BOS

23h 27m1 stop

$1,267Qantas Airways

Find Deal

Thu, Feb 12 - Sun, Mar 1

4:45 pm - 2:25 pmBOS-SYD

29h 40m2 stops

11:20 am - 6:47 pmSYD-BOS

23h 27m1 stop

$1,274Qantas Airways

Find Deal

Sun, Feb 15 - Sun, Mar 1

7:37 pm - 9:00 amBOS-SYD

45h 23m1 stop

11:20 am - 10:00 pmSYD-BOS

26h 40m1 stop

$1,282Qantas Airways

Find Deal

Fri, Feb 13 - Sun, Mar 1

10:35 am - 7:20 amBOS-SYD

30h 45m2 stops

9:20 am - 9:50 amSYD-BOS

38h 30m2 stops

$1,285Air Canada

Find Deal

Sun, May 3 - Sat, May 9

8:00 am - 11:40 amBOS-SYD

35h 40m2 stops

11:20 am - 12:45 amSYD-BOS

29h 25m2 stops

$1,286United Airlines

Find Deal

Tue, Dec 16 - Fri, Dec 19

7:16 am - 9:05 amBOS-SYD

34h 49m2 stops

12:10 pm - 12:49 amSYD-BOS

27h 39m1 stop

$1,289United Airlines

Find Deal

Sun, Mar 8 - Sat, Mar 28

Qantas Airways flights from Boston to Sydney

Our best Qantas Airways deals on Boston to Sydney flight tickets

Qantas Airways

Mar 6

BOS7:37 pmBoston Logan Intl

45h 23m

1 stop

SYD9:00 amSydney Kingsford Smith

Mar 22

SYD1:05 pmSydney Kingsford Smith

20h 49m

1 stop

BOS6:54 pmBoston Logan Intl

$1,257

Find similar

Qantas Airways

Mar 8

BOS4:23 pmBoston Logan Intl

31h 02m

2 stops

SYD2:25 pmSydney Kingsford Smith

Mar 28

SYD11:20 amSydney Kingsford Smith

22h 27m

1 stop

BOS6:47 pmBoston Logan Intl

$1,262

Find similar

Qantas Airways

Feb 14

BOS4:45 pmBoston Logan Intl

24h 15m

1 stop

SYD9:00 amSydney Kingsford Smith

Mar 1

SYD11:20 amSydney Kingsford Smith

34h 47m

1 stop

BOS6:07 amBoston Logan Intl

$1,263

Find similar

Air Canada flights from Boston to Sydney

Our best Air Canada deals on Boston to Sydney flight tickets

Air Canada

May 3

BOS10:35 amBoston Logan Intl

30h 45m

2 stops

SYD7:20 amSydney Kingsford Smith

May 9

SYD9:20 amSydney Kingsford Smith

38h 30m

2 stops

BOS9:50 amBoston Logan Intl

$1,285

Find similar

Air Canada

Feb 26

BOS3:40 pmBoston Logan Intl

25h 55m

2 stops

SYD9:35 amSydney Kingsford Smith

Mar 8

SYD11:20 amSydney Kingsford Smith

37h 42m

2 stops

BOS9:02 amBoston Logan Intl

$1,291

Find similar

Air Canada

Feb 26

BOS10:15 amBoston Logan Intl

31h 20m

2 stops

SYD9:35 amSydney Kingsford Smith

Mar 8

SYD11:20 amSydney Kingsford Smith

37h 42m

2 stops

BOS9:02 amBoston Logan Intl

$1,292

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 3/6

7:37 pm-9:00 am

1 stop45h 23m

Sydney Kingsford Smith

Sun 3/22

1:05 pm-6:54 pm

1 stop20h 49m

$1,257

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 4/27

10:35 am-7:20 am

2 stops30h 45m

Sydney Kingsford Smith

Thu 4/30

9:10 am-4:54 pm

1 stop21h 44m

$1,261

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 3/8

4:23 pm-2:25 pm

2 stops31h 02m

Sydney Kingsford Smith

Sat 3/28

11:20 am-6:47 pm

1 stop22h 27m

$1,262

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 2/14

4:45 pm-9:00 am

1 stop24h 15m

Sydney Kingsford Smith

Sun 3/1

11:20 am-6:07 am

1 stop34h 47m

$1,263

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Thu 2/12

7:15 am-9:00 am

1 stop33h 45m

Sydney Kingsford Smith

Sun 3/1

11:20 am-6:47 pm

1 stop23h 27m

$1,267

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 2/15

4:45 pm-2:25 pm

2 stops29h 40m

Sydney Kingsford Smith

Sun 3/1

11:20 am-6:47 pm

1 stop23h 27m

$1,274

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 2/13

7:37 pm-9:00 am

1 stop45h 23m

Sydney Kingsford Smith

Sun 3/1

11:20 am-10:00 pm

1 stop26h 40m

$1,282

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/3

10:35 am-7:20 am

2 stops30h 45m

Sydney Kingsford Smith

Sat 5/9

9:20 am-9:50 am

2 stops38h 30m

$1,285

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 12/16

8:00 am-11:40 am

2 stops35h 40m

Sydney Kingsford Smith

Fri 12/19

11:20 am-12:45 am

2 stops29h 25m

$1,286

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 3/8

7:16 am-9:05 am

2 stops34h 49m

Sydney Kingsford Smith

Sat 3/28

12:10 pm-12:49 am

1 stop27h 39m

$1,289

Flights are sorted by cheapest round-trip 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

Layovers

What is the cheapest month to fly to Sydney?

In general, March is the cheapest month to fly from Boston to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,217. If you are unable to visit Sydney during the month of March, then departing from Boston during the month September is also very affordable. Most momondo users find prices during this month for around $1,220.

What is the cheapest day to depart on your flight to Sydney?

The cheapest day to depart from Boston to Sydney is on a Wednesday when prices can be found for as low as $1,444. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,562.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the morning. momondo users have found flights departing from Boston to Sydney in the morning for as low as $1,438. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly in the evening, with an average ticket price of $1,494. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight 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 $1,420 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Boston for as low as $1,223 on momondo.

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 2% 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 November 2025, prices for Boston to Sydney flights are approximately 38% 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 round-trip 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

Direct flights	None

There are no direct flights from Boston to Sydney. There are no popular flight routes from Boston to Sydney.

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How far is Boston Logan Intl to Sydney Kingsford Smith by plane?
Boston Logan Intl and Sydney Kingsford Smith are 10084.4 mi apart from one another. 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 were last updated today.
How many operators does momondo search for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?
As of November 2025, there are 10 operators available to choose from for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport.
How old do you have to be to fly from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. 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 necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Boston to Sydney?
Based on momondo bookings for flights between Boston and Sydney, the leading airline is United Airlines, making up 38% of the total bookings. Other popular airlines include Qantas Airways with 21%, Delta with 16%, and American Airlines with 10%.

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
JetBlue	PriceFrom $248	Free Cancellation	Rating 7.2 2,905 reviews	Search JetBlue flights
Delta	PriceFrom $400	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
Air Canada	PriceFrom $735	Free Cancellation	Rating 7.1 10,461 reviews	Search Air Canada flights
United Airlines	PriceFrom $824	Free Cancellation	Rating 7.4 9,019 reviews	Search United Airlines flights
Fiji Airways	PriceFrom $831	Free Cancellation	Rating 8.1 209 reviews	Search Fiji Airways flights
American Airlines	PriceFrom $916	Free Cancellation	Rating 7.2 11,045 reviews	Search American Airlines flights
Qantas Airways	PriceFrom $1,109	Free Cancellation	Rating 7.5 941 reviews	Search Qantas Airways flights
Air New Zealand	PriceFrom $1,228	Free Cancellation	Rating 8.0 529 reviews	Search Air New Zealand flights
Qatar Airways	PriceFrom $1,272	Free Cancellation	Rating 7.4 3,664 reviews	Search Qatar Airways flights
Cathay Pacific	PriceFrom $1,318	Free Cancellation	Rating 7.6 1,061 reviews	Search Cathay Pacific flights

Parramatta

Bondi Beach

Katoomba

Wollongong

Randwick

Coogee

Cronulla

Manly

Penrith

Leura

Lithgow

Charlestown

Terrigal

Swansea

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Sydney?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Boston to Sydney for you.

Can I find flights from Boston to Sydney with flexible booking policies on momondo?

Yes. All flights to Sydney from Boston on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Boston to Sydney?

momondo provides multiple filters to help you find the best flight to Sydney from Boston. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Boston to Sydney right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Boston to Sydney flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Fly to other destinations from Boston

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Cheap flights from Boston to Sydney from $497

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Sydney departing on 12/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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Find the cheapest flights from Boston to Sydney

Cheap round-trip flights

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Qantas Airways flights from Boston to Sydney

Our best Qantas Airways deals on Boston to Sydney flight tickets

Air Canada flights from Boston to Sydney

Our best Air Canada deals on Boston to Sydney flight tickets

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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

What is the cheapest month to fly to Sydney?

What is the cheapest day to depart on your flight to Sydney?

The cheapest day to depart from Boston to Sydney is on a Wednesday when prices can be found for as low as $1,444. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,562.

What is the cheapest time of day to depart on your flight to Sydney?

How far in advance should I book a flight to Sydney?

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 2% 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 November 2025, prices for Boston to Sydney flights are approximately 38% cheaper when compared to flights at the same time last year.

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

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

What airlines fly to Sydney?

Which airport is the most popular layover for flights between Boston and Sydney?

Los Angeles (LAX) was the most common stop: 59% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Boston to Sydney?

Flights via Dallas (DFW) offer the lowest average round-trip price of $200.

Which layover airport has the shortest travel time from Boston to Sydney?

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 8h 56m.

Which layover airport has the shortest connection time from Boston to Sydney?

San Francisco (SFO) has the shortest average layover time for this route: 1h 36m.

When to book flights from Boston to Sydney

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

Direct flights

How far is Boston Logan Intl to Sydney Kingsford Smith by plane?

When did momondo last update prices for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

How many operators does momondo search for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

How old do you have to be to fly from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

What is the most popular airline from Boston to Sydney?

Best airlines flying from Boston to Sydney

Compare and see reviews for airlines that fly from Boston to Sydney with momondo

Traveling to a place near Sydney?

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Sydney?

Can I find flights from Boston to Sydney with flexible booking policies on momondo?

How can momondo help me find flights from Boston to Sydney?

I’m not ready to book a flight from Boston to Sydney right now. Can momondo alert me if prices change?

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Australia

Airports servicing New South Wales