BOS - YQY

$278 Find Cheap Flights from Boston to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Sydney departing on 8/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Sydney, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Sydney, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Boston to Sydney (BOS-YQY)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Sydney

Fri, Sep 12 - Sun, Sep 14
Air Canada Logo
10:20 am - 3:48 pmBOS-YQY
4h 28m1 stop
Air Canada Logo
5:15 am - 9:55 amYQY-BOS
5h 40m1 stop
$560Air Canada
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Fri, Sep 12 - Sun, Sep 14
Air Canada Logo
6:55 pm - 3:48 pmBOS-YQY
19h 53m2 stops
Air Canada Logo
5:15 am - 9:55 amYQY-BOS
5h 40m1 stop
$584Air Canada
Find Deal
Fri, Sep 26 - Sun, Sep 28
Air Canada Logo
6:55 pm - 3:48 pmBOS-YQY
19h 53m2 stops
Air Canada Logo
5:15 am - 9:55 amYQY-BOS
5h 40m1 stop
$591Air Canada
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Fri, Sep 26 - Sun, Sep 28
Air Canada Logo
6:00 am - 3:48 pmBOS-YQY
8h 48m1 stop
Air Canada Logo
5:15 am - 11:29 amYQY-BOS
7h 14m1 stop
$594Air Canada
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Wed, Aug 13 - Mon, Aug 18
Air Canada Logo
10:20 am - 3:47 pmBOS-YQY
4h 27m1 stop
Air Canada Logo
4:30 pm - 9:56 pmYQY-BOS
6h 26m1 stop
$606Air Canada
Find Deal
Fri, Sep 12 - Sun, Sep 14
Air Canada Logo
6:55 pm - 3:48 pmBOS-YQY
19h 53m2 stops
Air Canada Logo
4:30 pm - 9:55 amYQY-BOS
18h 25m2 stops
$608Air Canada
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Tue, Aug 19 - Tue, Aug 26
Air Canada Logo
10:20 am - 3:47 pmBOS-YQY
4h 27m1 stop
Air Canada Logo
5:10 am - 11:28 amYQY-BOS
7h 18m1 stop
$613Air Canada
Find Deal
Wed, Jul 9 - Fri, Jul 11
Air Canada Logo
4:35 pm - 1:17 amBOS-YQY
7h 42m1 stop
Air Canada Logo
5:10 am - 11:28 amYQY-BOS
7h 18m1 stop
$619Air Canada
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Thu, Aug 21 - Mon, Aug 25
Logo
8:45 am - 7:30 pmBOS-YQY
9h 45m3 stops
Logo
3:00 pm - 9:31 pmYQY-BOS
7h 31m2 stops
$716
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Fri, Oct 10 - Tue, Oct 14
WestJet Logo
6:30 pm - 6:51 pmBOS-YQY
23h 21m1 stop
WestJet Logo
7:40 pm - 10:29 pmYQY-BOS
27h 49m2 stops
$855WestJet
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Useful Info

KAYAK's insights & trends for Boston to Sydney flights

Get data-powered insights and trends into flights from Boston to Sydney to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Boston to Sydney?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Boston to Sydney were found on Air Canada ($560) and WestJet ($855).

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Good to know

Cheapest flight$278
Flight from Boston to Sydney

When to book flights from Boston to Sydney

Are your dates flexible? Find out the best times to travel from Boston to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Boston to Sydney

  • What is the cheapest flight from Boston to Sydney?

    In the last 3 days, the lowest price for a flight from Boston to Sydney was $278 for a one-way ticket and $560 for a round-trip.

  • Do I need a passport to fly between Boston and Sydney?

    Yes

  • Which aircraft models fly most regularly from Boston to Sydney?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Boston to Sydney?

    Star Alliance is the only airline alliance operating flights between Boston and Sydney.

  • How does KAYAK find such low prices on flights from Boston to Sydney?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Sydney.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Sydney?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Sydney?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sydney with an airline and back to Boston with another airline. Booking your flights between Boston and YQY can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Sydney?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airline flying from Boston to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Boston to Sydney. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Sydney? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
Air CanadaOverall score based on 9554 reviews
7.8Crew
7.3Boarding
7.0Comfort
6.8Entertainment
6.3Food
Airline reviews

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

6.0 GoodAnonymous, Jun 2025CMH - YYZ
Read more Air Canada reviews

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

The staff made sure I was comfortable, moved me to a better seat with more leg room

Everything was fine, crew was great. Always appreciate an on-time flight.

The staff could have been friendlier. And Having the flight on time would have been much more convenient.

Old, noisy plane, bad coffee, delayed. Flight attendant was very nice.

We boarded 1.5 hours late. Long wait for the bags when we got to Mexico City. Long wait to get on plane with people mover truck. Friendly staff. They answered all questions as best the could. Such a long, long walk from the plane to customs. Thank you, Michael A. Burris Cambridge, Massachusetts USA

I was forced to check my carry-on bag, which I don't appreciate.

No entertainment. Luckily I was the only person in that row. Small seating

Speechless! How professionally running. I am so proud of Air Canada 🍁 👏 ..

The flight was booked solid and there is no leg room for anyone over 6 feet tall, which is probably 25% of your customers. I have selected aisle seats and was given the middle twice. This is not something that can be changed, so I shouldnt bring it up, but that is my feedback.

Everything you need to know for your flight from Boston to Sydney

Information on your arrival and departure airports

Boston (BOS)
Sydney (YQY)

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