Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Boston to Sydney from $524

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 4/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

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

Trusted and free

Trusted and free

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

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Boston to Sydney

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
5:50 am - 7:20 am
BOS
-
SYD
35h 30m
2 stops
Air Canada Logo
9:20 am - 9:45 am
SYD
-
BOS
38h 25m
2 stops
$1,268Air Canada
Wed, May 6 - Wed, May 13
Air Canada Logo
5:50 am - 7:20 am
BOS
-
SYD
35h 30m
2 stops
Air Canada Logo
9:20 am - 9:27 pm
SYD
-
BOS
26h 07m
2 stops
$1,269Air Canada
Mon, May 11 - Tue, Jun 16
Air Canada Logo
5:50 am - 7:20 am
BOS
-
SYD
35h 30m
2 stops
Air Canada Logo
9:20 am - 9:45 am
SYD
-
BOS
38h 25m
2 stops
$1,270Air Canada
Sun, May 10 - Sun, May 17
Air Canada Logo
5:50 am - 7:20 am
BOS
-
SYD
35h 30m
2 stops
Air Canada Logo
9:20 am - 9:45 am
SYD
-
BOS
38h 25m
3 stops
$1,276Air Canada
Sun, May 17 - Wed, May 27
Air Canada Logo
10:40 am - 7:20 am
BOS
-
SYD
30h 40m
2 stops
Air Canada Logo
9:20 am - 9:45 am
SYD
-
BOS
38h 25m
3 stops
$1,277Air Canada
Sun, May 17 - Wed, May 27
Air Canada Logo
10:35 am - 7:20 am
BOS
-
SYD
30h 45m
3 stops
Air Canada Logo
9:20 am - 9:45 am
SYD
-
BOS
38h 25m
2 stops
$1,279Air Canada
Sun, May 24 - Sun, May 31
Air Canada Logo
6:50 pm - 7:20 am
BOS
-
SYD
46h 30m
2 stops
Air Canada Logo
9:20 am - 9:45 am
SYD
-
BOS
38h 25m
2 stops
$1,280Air Canada
Sun, May 17 - Wed, May 27
Air Canada Logo
10:35 am - 7:20 am
BOS
-
SYD
30h 45m
3 stops
Air Canada Logo
9:20 am - 9:27 pm
SYD
-
BOS
26h 07m
2 stops
$1,289Air Canada
Tue, Jun 9 - Tue, Jun 16
Air Canada Logo
10:35 am - 7:20 am
BOS
-
SYD
30h 45m
2 stops
Air Canada Logo
9:20 am - 9:45 am
SYD
-
BOS
38h 25m
2 stops
$1,290Air Canada
Sun, May 24 - Sun, May 31
Air Canada Logo
10:35 am - 7:20 am
BOS
-
SYD
30h 45m
3 stops
Air Canada Logo
9:20 am - 9:45 am
SYD
-
BOS
38h 25m
2 stops
$1,298Air Canada
Sun, May 24 - Sun, May 31

ANA flights from Boston to Sydney

Our best ANA deals on Boston to Sydney flight tickets
ANA
Aug 26
BOS12:30 pmBoston Logan Intl
40h 40m
2 stops
SYD7:10 pmSydney Kingsford Smith
Sep 7
SYD8:55 pmSydney Kingsford Smith
40h 25m
2 stops
BOS11:20 pmBoston Logan Intl
$1,353
ANA
Apr 18
BOS7:30 amBoston Logan Intl
59h 55m
2 stops
SYD9:25 amSydney Kingsford Smith
May 3
SYD8:55 pmSydney Kingsford Smith
36h 09m
2 stops
BOS7:04 pmBoston Logan Intl
$10,979
ANA
Apr 18
BOS7:30 amBoston Logan Intl
59h 55m
2 stops
SYD9:25 amSydney Kingsford Smith
Apr 27
SYD8:55 pmSydney Kingsford Smith
31h 47m
2 stops
BOS2:42 pmBoston Logan Intl
$13,128

Air Canada flights from Boston to Sydney

Our best Air Canada deals on Boston to Sydney flight tickets
Air Canada
May 6
BOS5:50 amBoston Logan Intl
35h 30m
2 stops
SYD7:20 amSydney Kingsford Smith
May 13
SYD9:20 amSydney Kingsford Smith
38h 25m
2 stops
BOS9:45 amBoston Logan Intl
$1,268
Air Canada
May 11
BOS5:50 amBoston Logan Intl
35h 30m
2 stops
SYD7:20 amSydney Kingsford Smith
Jun 16
SYD9:20 amSydney Kingsford Smith
26h 07m
2 stops
BOS9:27 pmBoston Logan Intl
$1,269
Air Canada
May 10
BOS5:50 amBoston Logan Intl
35h 30m
2 stops
SYD7:20 amSydney Kingsford Smith
May 17
SYD9:20 amSydney Kingsford Smith
38h 25m
2 stops
BOS9:45 amBoston Logan Intl
$1,270

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated April 13, 2026.
Use the filters below to find and compare flights from Boston to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 5/6

5:50 am-7:20 am

2 stops35h 30m

Sydney Kingsford Smith

Wed 5/13

9:20 am-9:45 am

2 stops38h 25m

$1,268

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 5/11

5:50 am-7:20 am

2 stops35h 30m

Sydney Kingsford Smith

Tue 6/16

9:20 am-9:27 pm

2 stops26h 07m

$1,269

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/10

5:50 am-7:20 am

2 stops35h 30m

Sydney Kingsford Smith

Sun 5/17

9:20 am-9:45 am

2 stops38h 25m

$1,270

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/17

5:50 am-7:20 am

2 stops35h 30m

Sydney Kingsford Smith

Wed 5/27

9:20 am-9:45 am

3 stops38h 25m

$1,276

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/17

10:40 am-7:20 am

2 stops30h 40m

Sydney Kingsford Smith

Wed 5/27

9:20 am-9:45 am

3 stops38h 25m

$1,277

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/24

10:35 am-7:20 am

3 stops30h 45m

Sydney Kingsford Smith

Sun 5/31

9:20 am-9:45 am

2 stops38h 25m

$1,279

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/17

6:50 pm-7:20 am

2 stops46h 30m

Sydney Kingsford Smith

Wed 5/27

9:20 am-9:45 am

2 stops38h 25m

$1,280
Quickest round-trip

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 6/9

10:35 am-7:20 am

3 stops30h 45m

Sydney Kingsford Smith

Tue 6/16

9:20 am-9:27 pm

2 stops26h 07m

$1,289

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/24

10:35 am-7:20 am

2 stops30h 45m

Sydney Kingsford Smith

Sun 5/31

9:20 am-9:45 am

2 stops38h 25m

$1,290

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/24

10:35 am-7:20 am

3 stops30h 45m

Sydney Kingsford Smith

Sun 5/31

9:20 am-9:45 am

2 stops38h 25m

$1,298

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Sydney from

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 typical price of a round-trip flight between Boston and Sydney?

What is the cheapest month to fly to Sydney?

In general, September 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 $1,215. If you are unable to visit Sydney during the month of September, then departing from Boston during the month March is also very affordable. Most momondo users find prices during this month for around $1,293.

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 $1,490 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 $1,241 on momondo.

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 20% 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 April 2026, prices for Boston to Sydney flights are approximately 2% 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

Fastest flight time

30h 24m

Direct flights

None
The fastest flight from Boston to Sydney takes 30h 24m
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?

    Boston Logan Intl and Sydney Kingsford Smith are 10084.4 mi apart from one another. Typically, this will take 30h 24m 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?

  • 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?

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
JetBluePriceFrom $251Free CancellationRating
7.2
2,930 reviews
Search JetBlue flights
DeltaPriceFrom $317Free CancellationRating
7.9
8,408 reviews
Search Delta flights
Fiji AirwaysPriceFrom $727Free CancellationRating
8.1
239 reviews
Search Fiji Airways flights
Air CanadaPriceFrom $907Free CancellationRating
7.1
10,918 reviews
Search Air Canada flights
Qantas AirwaysPriceFrom $1,077Free CancellationRating
7.5
1,018 reviews
Search Qantas Airways flights
United AirlinesPriceFrom $1,145Free CancellationRating
7.4
9,579 reviews
Search United Airlines flights
American AirlinesPriceFrom $1,147Free CancellationRating
7.1
11,570 reviews
Search American Airlines flights
Air New ZealandPriceFrom $1,166Free CancellationRating
8.0
626 reviews
Search Air New Zealand flights
Qatar AirwaysPriceFrom $1,233Free CancellationRating
7.4
3,725 reviews
Search Qatar Airways flights
Cathay PacificPriceFrom $1,318Free CancellationRating
7.6
1,275 reviews
Search Cathay Pacific flights

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Bondi Beach
Katoomba
Wollongong
Penrith
Leura
Randwick
Coogee
Lithgow
Manly
Cronulla
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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 5/13
Wed 5/20
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Australia