BOS - YQY

$305 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 9/1. 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

Sat, Oct 4 - Sun, Oct 12
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
$572Air Canada
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Sat, Oct 4 - Sun, Oct 12
Air Canada Logo
6:00 am - 3:48 pmBOS-YQY
8h 48m2 stops
Air Canada Logo
5:15 am - 9:55 amYQY-BOS
5h 40m1 stop
$579Air Canada
Find Deal
Thu, Sep 11 - Thu, Sep 18
Air Canada Logo
4:45 pm - 12:09 amBOS-YQY
6h 24m1 stop
Air Canada Logo
5:15 am - 9:55 amYQY-BOS
5h 40m1 stop
$601Air Canada
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Thu, Sep 11 - Thu, Sep 18
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
$625Air Canada
Find Deal
Sat, Oct 4 - Sun, Oct 12
Air Canada Logo
6:00 am - 3:48 pmBOS-YQY
8h 48m2 stops
Air Canada Logo
4:30 pm - 10:39 pmYQY-BOS
7h 09m2 stops
$627Air Canada
Find Deal
Sat, Aug 30 - Sat, Sep 6
Air Canada Logo
6:00 am - 3:54 pmBOS-YQY
8h 54m2 stops
Air Canada Logo
5:15 am - 9:55 amYQY-BOS
5h 40m1 stop
$651Air Canada
Find Deal
Sat, Aug 30 - Sat, Sep 6
Air Canada Logo
6:00 am - 3:54 pmBOS-YQY
8h 54m2 stops
Air Canada Logo
4:30 pm - 10:39 pmYQY-BOS
7h 09m2 stops
$673Air Canada
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Mon, Sep 8 - Mon, Sep 15
Logo
6:30 pm - 6:51 pmBOS-YQY
23h 21m1 stop
Logo
3:00 pm - 10:01 pmYQY-BOS
8h 01m2 stops
$675
Find Deal
Thu, Sep 11 - Thu, Sep 18
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
$680Air Canada
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Mon, Sep 8 - Mon, Sep 15
Logo
8:45 am - 7:30 pmBOS-YQY
9h 45m3 stops
Logo
3:00 pm - 10:01 pmYQY-BOS
8h 01m2 stops
$760
Find Deal
Booking Insights

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.

What is the most popular layover airport when flying from Boston to Sydney?

Percentage of 1-stop round-trip flights from Boston to Sydney chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Montreal (YUL) is the top choice – 96% of KAYAK users who clicked on 1-stop flights from Boston to Sydney picked an itinerary connecting there.

What is the cheapest layover airport when flying from Boston to Sydney?

Average round-trip price for 1-stop flights from Boston to Sydney clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Toronto (YYZ) offer the most affordable fares, with an average round-trip price of $715.

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

Shortest average total travel time for 1-stop one-way flights from Boston to Sydney via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Montreal (YUL) for the shortest journey. The average one-way travel time for flights connecting there is 5h 09m.

Which layover airport has the quickest connection when flying from Boston to Sydney?

Average layover duration at different layover airports for 1-stop one-way flights from Boston to Sydney, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Toronto (YYZ) often has the shortest layovers from Boston to Sydney, with an average of 1h 32m.

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Good to know

Cheapest flight$305
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 $305 for a one-way ticket and $572 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.

Reviews of the 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 9837 reviews
7.8Crew
6.3Food
7.3Boarding
7.1Comfort
6.8Entertainment
Airline reviews

On-time boarding, departure, and flight. Electronic notifications about bags for the whole of their own journey too - from when they got accepted into the system through to being loaded onto the plane and then finally being disgorged onto the right carousel. That was an excellent feature.

10.0 ExcellentRobert, Jul 2025YUL - YHZ
Read more Air Canada reviews

On-time boarding, departure, and flight. Electronic notifications about bags for the whole of their own journey too - from when they got accepted into the system through to being loaded onto the plane and then finally being disgorged onto the right carousel. That was an excellent feature.

Both flights are delayed so I rate the whole experience as mediocre.

I had a good experience. I liked being informed about the status of my luggage

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 🍁 👏 ..

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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