$506 Cheap Flights from Boston (BOS) to Sydney (SYD)

View $506 flight on Tue, Dec 9, 2025Opens in a new window

Popular airlines from Logan International Airport (BOS) to Sydney Airport (SYD)

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Cheap Flights from Boston to Sydney (BOS-SYD)

Prices were available within the past 7 days and start at $506 for one-way flights and $1,077 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sun, Feb 8 - Wed, Feb 25
BOS
Boston
SYD
Sydney
$1,077 Roundtrip, just found
$1,077
Roundtrip
just found
Select Air Canada flight, departing Sun, Feb 8 from Boston to Sydney, returning Wed, Feb 25, priced at $1,077 just found
Qantas Airways
Thu, May 14 - Fri, May 29
BOS
Boston
SYD
Sydney
$1,211 Roundtrip, found 4 hours ago
$1,211
Roundtrip
found 4 hours ago
Select Qantas Airways flight, departing Thu, May 14 from Boston to Sydney, returning Fri, May 29, priced at $1,211 found 4 hours ago
American Airlines
Thu, Jul 2 - Fri, Jul 17
BOS
Boston
SYD
Sydney
$1,212 Roundtrip, found 3 hours ago
$1,212
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Thu, Jul 2 from Boston to Sydney, returning Fri, Jul 17, priced at $1,212 found 3 hours ago
United
Sat, Apr 11 - Thu, Apr 30
BOS
Boston
SYD
Sydney
$1,228 Roundtrip, found 3 days ago
$1,228
Roundtrip
found 3 days ago
Select United flight, departing Sat, Apr 11 from Boston to Sydney, returning Thu, Apr 30, priced at $1,228 found 3 days ago
Delta
Fri, Oct 24 - Fri, Nov 7
BOS
Boston
SYD
Sydney
$1,231 Roundtrip, found 1 hour ago
$1,231
Roundtrip
found 1 hour ago
Select Delta flight, departing Fri, Oct 24 from Boston to Sydney, returning Fri, Nov 7, priced at $1,231 found 1 hour ago
Fiji Airways
Tue, Feb 3 - Sat, Feb 7
BOS
Boston
SYD
Sydney
$1,239 Roundtrip, found 6 days ago
$1,239
Roundtrip
found 6 days ago
Select Fiji Airways flight, departing Tue, Feb 3 from Boston to Sydney, returning Sat, Feb 7, priced at $1,239 found 6 days ago
All Nippon Airways
Mon, Apr 27 - Tue, May 12
BOS
Boston
SYD
Sydney
$1,278 Roundtrip, found 5 hours ago
$1,278
Roundtrip
found 5 hours ago
Select All Nippon Airways flight, departing Mon, Apr 27 from Boston to Sydney, returning Tue, May 12, priced at $1,278 found 5 hours ago
Turkish Airlines
Wed, Dec 31 - Fri, May 15
BOS
Boston
SYD
Sydney
$1,412 Roundtrip, found 1 day ago
$1,412
Roundtrip
found 1 day ago
Select Turkish Airlines flight, departing Wed, Dec 31 from Boston to Sydney, returning Fri, May 15, priced at $1,412 found 1 day ago
Air New Zealand
Sun, Feb 8 - Wed, Feb 25
BOS
Boston
SYD
Sydney
$1,544 Roundtrip, just found
$1,544
Roundtrip
just found
Select Air New Zealand flight, departing Sun, Feb 8 from Boston to Sydney, returning Wed, Feb 25, priced at $1,544 just found
Hawaiian Airlines
Mon, Jan 26 - Tue, Feb 10
BOS
Boston
SYD
Sydney
$1,582 Roundtrip, found 7 hours ago
$1,582
Roundtrip
found 7 hours ago
Select Hawaiian Airlines flight, departing Mon, Jan 26 from Boston to Sydney, returning Tue, Feb 10, priced at $1,582 found 7 hours ago

Find the cheapest month to fly from Boston (BOS) to Sydney (SYD)

April is typically the cheapest month to fly

From $806 - $1,706 per traveler.

Alternative airports near Sydney

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Kingsford Smith Intl. SYD. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $1,347
SYD
Kingsford Smith Intl.
Cheapest
Average driving time to city center16 min
Flights from $1,347
Flights from Boston (BOS) to Sydney (SYD)
Origin airport
Logan Intl.
Destination airport
Kingsford Smith Intl.
Airlines serving
Air Canada, Air New Zealand, Alaska Airlines, All Nippon Airways, American Airlines, British Airways, Cathay Pacific, Delta, Emirates, Etihad Airways, Hawaiian Airlines, Japan Airlines, JetBlue Airways, Korean Air, Malaysia Airlines, Qantas Airways, Qatar Airways, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$1,077
Distance
10096 mi

Boston to Sydney Flights

The cheapest times to fly from Boston to Sydney

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Boston to Sydney are during the month of February. You can find some of the cheapest flights from Boston to Sydney with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boston to Sydney

Sunday is one of the best days to book for cheap flights from Boston to Sydney: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Boston to Sydney

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Boston to Sydney in 2025. You can also book with separate airlines for your outbound and return journeys, from $506 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Boston to Sydney flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Boston to Sydney airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Logan Intl. Airport (BOS) to Kingsford Smith Intl. Airport (SYD) cost?
Grab a cheap one-way flight from $506 or cheap return flight from $1,077 from Logan Intl. Airport (BOS) to Kingsford Smith Intl. Airport (SYD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Logan Intl. Airport (BOS) to Kingsford Smith Intl. Airport (SYD)?
Planning your trip for February may help you find better deals, as it's the cheapest month for flights between BOS and SYD. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Logan Intl. Airport (BOS) to Kingsford Smith Intl. Airport (SYD)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest BOS to SYD flight.
How many flights per day from Logan Intl. Airport (BOS) to Kingsford Smith Intl. Airport (SYD)?
There aren't any daily nonstop flights available from Logan Intl. Airport (BOS) to Kingsford Smith Intl. Airport (SYD). But you can choose flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time.
What day of the week has the most flights from BOS to SYD?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary depending on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Logan Intl. Airport (BOS) to Kingsford Smith Intl. Airport (SYD)?
To arrive at Kingsford Smith Intl. Airport (SYD) without delays, select a flight that takes off from Logan Intl. Airport (BOS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to Kingsford Smith Intl. Airport (SYD) last-minute?
Booking your plane ticket from BOS to SYD shortly before your getaway is typically more expensive. But if there's some wiggle room with your travel dates and times, you could score a cheap last-minute fare.
Is it cheaper to book a BOS to SYD flight and hotel package?
Securing a BOS to SYD flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Pick from our wide range of accommodations and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to Kingsford Smith Intl. Airport (SYD)?
In most instances, you can reschedule or cancel your BOS to SYD flight. However, there may be additional charges, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you'd like further information, visit our Customer Service portal.

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*Available to One Key members.