BOS - YQY

$742 Find Cheap Flights from Boston to Sydney

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Sydney departing on 5/10. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$746
Air Canada
Sun 5/10Wed 5/13
BOS - YQY • 1 stop
Cheapest one-way
Multiple Airlines
Mon 12/15
BOS - YQY • multi-stop
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Flight Deals
Booking Insights
Flight 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

Sun, May 10 - Wed, May 13
Air Canada Logo
10:35 am - 4:39 pm
BOS
-
YQY
5h 04m1 stop
Air Canada Logo
5:05 am - 9:54 am
YQY
-
BOS
5h 49m1 stop
$746Air Canada
Sun, May 10 - Wed, May 13
Air Canada Logo
5:25 am - 4:39 pm
BOS
-
YQY
10h 14m2 stops
Air Canada Logo
5:05 am - 9:54 am
YQY
-
BOS
5h 49m1 stop
$752Air Canada
Wed, Jan 28 - Wed, Feb 4
Air Canada Logo
3:40 pm - 11:23 pm
BOS
-
YQY
6h 43m1 stop
Air Canada Logo
12:15 pm - 10:37 pm
YQY
-
BOS
11h 22m1 stop
$798Air Canada
Wed, Jan 28 - Wed, Feb 4
Air Canada Logo
3:40 pm - 11:23 pm
BOS
-
YQY
6h 43m1 stop
Air Canada Logo
5:10 am - 3:57 pm
YQY
-
BOS
11h 47m2 stops
$807Air Canada
Sun, May 10 - Wed, May 13
Air Canada Logo
5:25 am - 4:39 pm
BOS
-
YQY
10h 14m2 stops
Air Canada Logo
5:20 pm - 9:54 am
YQY
-
BOS
17h 34m2 stops
$808Air Canada
Wed, Jan 28 - Wed, Feb 4
Air Canada Logo
1:00 pm - 11:23 pm
BOS
-
YQY
9h 23m2 stops
Air Canada Logo
5:10 am - 3:57 pm
YQY
-
BOS
11h 47m2 stops
$849Air Canada
Thu, Dec 25 - Sat, Jan 10
Air Canada Logo
3:40 pm - 12:08 am
BOS
-
YQY
7h 28m1 stop
Air Canada Logo
5:10 am - 7:42 pm
YQY
-
BOS
15h 32m1 stop
$1,217Air Canada
Thu, Dec 25 - Sat, Jan 10
Air Canada Logo
1:00 pm - 12:08 am
BOS
-
YQY
10h 08m2 stops
Air Canada Logo
5:10 am - 7:42 pm
YQY
-
BOS
15h 32m1 stop
$1,224Air Canada
Thu, Dec 25 - Sat, Jan 10
Multiple Airlines Logo
1:00 pm - 12:08 am
BOS
-
YQY
10h 08m2 stops
Multiple Airlines Logo
5:10 am - 3:09 pm
YQY
-
BOS
10h 59m2 stops
$1,233Multiple Airlines
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.

Which airlines fly non-stop between Boston and Sydney?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Boston to Sydney.

There is just one airline that flies from Boston to Sydney direct and that is Air Canada. The best round-trip deal found from Air Canada for the route is $614.

Find deals

Good to know

Cheapest flight$746
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 $746 for a round-trip ticket.

  • 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 10527 reviews
6.8Entertainment
7.8Crew
6.3Food
7.3Boarding
7.1Comfort
Airline reviews

My original flight was cancelled -- but I have to mention the excellent service I was given by the agent working at check-in who found me an earlier flight -- and helped me navigate security, ensured my baggage kept up with the quick check-in and boarding process -- and just generally made the re-booking process a breeze. Thank you! On flight was fine, but we unfortunately meant no in-flight service -- no water, or coffee (it was an early morning flight...), but the crew was pleasant and accommodating throughout.

8.0 ExcellentKatherine, Oct 2025
YYZ - YHZ
Read more Air Canada reviews

My original flight was cancelled -- but I have to mention the excellent service I was given by the agent working at check-in who found me an earlier flight -- and helped me navigate security, ensured my baggage kept up with the quick check-in and boarding process -- and just generally made the re-booking process a breeze. Thank you! On flight was fine, but we unfortunately meant no in-flight service -- no water, or coffee (it was an early morning flight...), but the crew was pleasant and accommodating throughout.

No in flight entertainment on a 750 mile flight. Made you join their "program" to get it. It was free on my first leg of the flight from Cincinnati to Toronto. In addition, there was brief period of turbulence that prohibited the crew from serving refreshments. They used that short interruption as an excuse to never serve drinks at all. They had ample time to do so and chose not to. They went around serving half cups of water instead rather than have their carts in the aisle with drinks.

Pearson Airport could not properly handle all the passengers who they needed to process in order to properly get them on board. As a result, I missed the departure of my flight from Toronto. The only saving grace is that Air Canada found a flight that only delayed me by one hour. However, this was no thanks to Pearson Airport!

It was great other than the plane was really small

Last minute cancellation, followed by last minute delay with the rescheduled flight. Both due to interval operation issues. Poor resolution.Very disappointing.

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.

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.

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

Information on your arrival and departure airports

Boston (BOS)
Sydney (YQY)