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

Delta, ANA, and Qantas Airways are the most popular carriers operating from Boston Logan Intl to Sydney Kingsford Smith

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

Flights via Dallas (DFW) offer the lowest average round-trip price of $863.

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: 16h 37m.

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 42% 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: 67% of momondo users choosing 1-stop flights on this route connected there.

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 39m.

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 August 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.

$496 Cheap Flights from Boston to Sydney (BOS-SYD) in 2025

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Find the cheapest flights from Boston to Sydney (BOS-SYD)

Round-trip

One-way

Last minute

Cheap round-trip flights

8:15 am - 9:20 amBOS-SYD

33h 05m2 stops

2:20 pm - 6:52 pmSYD-BOS

20h 32m1 stop

$1,095Qantas Airways

Find Deal

Mon, Feb 2 - Wed, Mar 4

8:15 am - 9:20 amBOS-SYD

33h 05m2 stops

2:20 pm - 8:30 pmSYD-BOS

22h 10m1 stop

$1,106Qantas Airways

Find Deal

Sat, Nov 8 - Wed, Nov 19

3:31 pm - 7:00 amBOS-SYD

25h 29m2 stops

11:20 am - 5:11 pmSYD-BOS

20h 51m1 stop

$1,107United Airlines

Find Deal

Mon, Sep 29 - Mon, Oct 6

9:53 am - 7:00 amBOS-SYD

31h 07m2 stops

11:20 am - 11:59 pmSYD-BOS

27h 39m2 stops

$1,116United Airlines

Find Deal

Mon, Sep 29 - Mon, Oct 6

3:26 pm - 6:35 amBOS-SYD

25h 09m2 stops

9:25 am - 11:53 pmSYD-BOS

28h 28m2 stops

$1,120Delta

Find Deal

Tue, Sep 2 - Tue, Sep 30

9:59 am - 6:35 amBOS-SYD

30h 36m2 stops

9:25 am - 11:56 pmSYD-BOS

28h 31m1 stop

$1,121Delta

Find Deal

Wed, Aug 27 - Sun, Sep 7

6:13 pm - 12:45 pmBOS-SYD

27h 32m2 stops

2:30 pm - 9:35 pmSYD-BOS

23h 05m2 stops

$1,125Fiji Airways

Find Deal

Tue, Oct 28 - Sat, Nov 15

6:13 pm - 9:50 pmBOS-SYD

36h 37m2 stops

2:30 pm - 9:35 pmSYD-BOS

23h 05m2 stops

$1,160Fiji Airways

Find Deal

Sat, Nov 1 - Sat, Nov 15

7:55 pm - 8:35 amBOS-SYD

45h 40m2 stops

11:20 am - 9:27 pmSYD-BOS

26h 07m2 stops

$1,178Air Canada

Find Deal

Mon, Oct 27 - Sun, Nov 9

6:40 pm - 9:35 amBOS-SYD

46h 55m2 stops

11:20 am - 9:27 pmSYD-BOS

26h 07m2 stops

$1,181Air Canada

Find Deal

Sat, Nov 8 - Wed, Nov 19

Qantas Airways flights from Boston to Sydney

Our best Qantas Airways deals on Boston to Sydney flight tickets

Qantas Airways

Feb 2

BOS8:15 amBoston Logan Intl

33h 05m

2 stops

SYD9:20 amSydney Kingsford Smith

Mar 4

SYD2:20 pmSydney Kingsford Smith

20h 32m

1 stop

BOS6:52 pmBoston Logan Intl

$1,095

Find similar

Qantas Airways

Nov 8

BOS8:15 amBoston Logan Intl

33h 05m

2 stops

SYD9:20 amSydney Kingsford Smith

Nov 19

SYD2:20 pmSydney Kingsford Smith

22h 10m

1 stop

BOS8:30 pmBoston Logan Intl

$1,106

Find similar

Qantas Airways

Jan 30

BOS4:23 pmBoston Logan Intl

26h 32m

2 stops

SYD10:55 amSydney Kingsford Smith

Feb 14

SYD2:20 pmSydney Kingsford Smith

22h 45m

1 stop

BOS9:05 pmBoston Logan Intl

$1,109

Find similar

American Airlines flights from Boston to Sydney

Our best American Airlines deals on Boston to Sydney flight tickets

American Airlines

Aug 17

BOS8:01 amBoston Logan Intl

33h 04m

1 stop

SYD7:05 amSydney Kingsford Smith

Aug 31

SYD9:10 amSydney Kingsford Smith

24h 39m

2 stops

BOS7:49 pmBoston Logan Intl

$1,354

Find similar

American Airlines

Aug 26

BOS8:01 amBoston Logan Intl

33h 04m

1 stop

SYD7:05 amSydney Kingsford Smith

Sep 2

SYD12:10 pmSydney Kingsford Smith

25h 06m

1 stop

BOS11:16 pmBoston Logan Intl

$1,362

Find similar

American Airlines

Aug 17

BOS6:07 pmBoston Logan Intl

22h 58m

1 stop

SYD7:05 amSydney Kingsford Smith

Aug 27

SYD9:10 amSydney Kingsford Smith

24h 05m

2 stops

BOS7:15 pmBoston Logan Intl

$1,365

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 2/2

8:15 am-9:20 am

2 stops33h 05m

Sydney Kingsford Smith

Wed 3/4

2:20 pm-6:52 pm

1 stop20h 32m

$1,095

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 11/8

8:15 am-9:20 am

2 stops33h 05m

Sydney Kingsford Smith

Wed 11/19

2:20 pm-8:30 pm

1 stop22h 10m

$1,106

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 9/29

3:31 pm-7:00 am

2 stops25h 29m

Sydney Kingsford Smith

Mon 10/6

11:20 am-5:11 pm

1 stop20h 51m

$1,107

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 9/29

9:53 am-7:00 am

2 stops31h 07m

Sydney Kingsford Smith

Mon 10/6

11:20 am-11:59 pm

2 stops27h 39m

$1,116

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 9/2

3:26 pm-6:35 am

2 stops25h 09m

Sydney Kingsford Smith

Tue 9/30

9:25 am-11:53 pm

2 stops28h 28m

$1,120

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 8/27

9:59 am-6:35 am

2 stops30h 36m

Sydney Kingsford Smith

Sun 9/7

9:25 am-11:56 pm

1 stop28h 31m

$1,121

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 10/28

6:13 pm-12:45 pm

2 stops27h 32m

Sydney Kingsford Smith

Sat 11/15

2:30 pm-9:35 pm

2 stops23h 05m

$1,125

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 11/1

6:13 pm-9:50 pm

2 stops36h 37m

Sydney Kingsford Smith

Sat 11/15

2:30 pm-9:35 pm

2 stops23h 05m

$1,160

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 10/27

7:55 pm-8:35 am

2 stops45h 40m

Sydney Kingsford Smith

Sun 11/9

11:20 am-9:27 pm

2 stops26h 07m

$1,178

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 11/8

6:40 pm-9:35 am

2 stops46h 55m

Sydney Kingsford Smith

Wed 11/19

11:20 am-9:27 pm

2 stops26h 07m

$1,181

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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, April 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 $1,266. If you are unable to visit Sydney during the month of April, then departing from Boston during the month March is also very affordable. Most momondo users find prices during this month for around $1,267.

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 $1,433 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 $1,203 on momondo.

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 1% 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 2025, prices for Boston to Sydney flights are approximately 36% 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

Best Price Found	$496
Fastest flight time	22h 20m
Direct flights	None
Airports in Sydney	1 airport

The best one-way flight to Sydney from Boston in the past 72 hours is $496. The best round-trip flight deal from Boston to Sydney found on momondo in the last 72 hours is $1,095.

The fastest flight from Boston to Sydney takes 22h 20m

There are no direct flights from Boston to Sydney. Popular non-direct route for this connection is Boston Logan Intl Airport - Sydney Kingsford Smith Airport.

There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)

Search flight deals

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 20m 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 August 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 35% of the total bookings. Other popular airlines include Qantas Airways with 23%, Delta with 15%, and American Airlines with 12%.

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 $251	Free Cancellation	Rating 7.2 2,916 reviews	Search JetBlue flights
Delta	PriceFrom $454	Free Cancellation	Rating 8.0 7,985 reviews	Search Delta flights
Air Canada	PriceFrom $735	Free Cancellation	Rating 7.1 9,966 reviews	Search Air Canada flights
United Airlines	PriceFrom $824	Free Cancellation	Rating 7.4 8,916 reviews	Search United Airlines flights
Fiji Airways	PriceFrom $831	Free Cancellation	Rating 8.0 204 reviews	Search Fiji Airways flights
American Airlines	PriceFrom $920	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Qantas Airways	PriceFrom $1,170	Free Cancellation	Rating 7.5 895 reviews	Search Qantas Airways flights
Air New Zealand	PriceFrom $1,228	Free Cancellation	Rating 8.0 504 reviews	Search Air New Zealand flights
Qatar Airways	PriceFrom $1,272	Free Cancellation	Rating 7.4 3,609 reviews	Search Qatar Airways flights
Cathay Pacific	PriceFrom $1,334	Free Cancellation	Rating 7.6 968 reviews	Search Cathay Pacific flights

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Wollongong

Randwick

Cronulla

Coogee

Lithgow

Penrith

Manly

Charlestown

Swansea

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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.

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Cheap flights from Boston to Sydney from $496

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 9/4. 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

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Find the cheapest flights from Boston to Sydney (BOS-SYD)

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Qantas Airways flights from Boston to Sydney

Our best Qantas Airways deals on Boston to Sydney flight tickets

American Airlines flights from Boston to Sydney

Our best American Airlines 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 1% 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 2025, prices for Boston to Sydney flights are approximately 36% 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?

Delta, ANA, 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: 67% 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 $863.

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: 16h 37m.

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 39m.

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

Best Price Found

Fastest flight time

Direct flights

Airports in Sydney

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