BOS - YQY

$312 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 9/9. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$674
Typical prices: $719-$631
Air Canada
Mon 9/14Fri 9/18
BOS - YQY • 1 stop
Cheapest one-way
$312
Air Canada
Wed 9/9
BOS - YQY • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Boston and Sydney. You'll need at least 1 connection.
Insights
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Insights
Top layover airports
Cheapest • Avg $899 (round-trip)
Shortest trip • 5h 52m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Sydney!
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

Mon, Sep 14 - Fri, Sep 18
Air Canada Logo
10:40 am - 4:38 pm
BOS
-
YQY
4h 58m
1 stop
Air Canada Logo
5:20 pm - 9:27 pm
YQY
-
BOS
5h 07m
1 stop
$674Air Canada
Thu, Sep 24 - Sun, Sep 27
Air Canada Logo
10:40 am - 4:38 pm
BOS
-
YQY
4h 58m
1 stop
Air Canada Logo
5:05 am - 9:55 am
YQY
-
BOS
5h 50m
1 stop
$679Air Canada
Sun, Sep 20 - Fri, Sep 25
Air Canada Logo
6:00 am - 4:38 pm
BOS
-
YQY
9h 38m
2 stops
Air Canada Logo
5:20 pm - 9:27 pm
YQY
-
BOS
5h 07m
1 stop
$682Air Canada
Thu, Sep 24 - Sun, Sep 27
Air Canada Logo
6:00 am - 4:38 pm
BOS
-
YQY
9h 38m
2 stops
Air Canada Logo
5:05 am - 9:55 am
YQY
-
BOS
5h 50m
1 stop
$687Air Canada
Tue, Sep 1 - Sun, Sep 6
Air Canada Logo
10:40 am - 4:39 pm
BOS
-
YQY
4h 59m
1 stop
Air Canada Logo
5:00 am - 9:53 am
YQY
-
BOS
5h 53m
1 stop
$694Air Canada
Mon, Sep 14 - Fri, Sep 18
Air Canada Logo
7:40 pm - 4:38 pm
BOS
-
YQY
19h 58m
2 stops
Air Canada Logo
5:20 pm - 9:27 pm
YQY
-
BOS
5h 07m
1 stop
$698Air Canada
Tue, Sep 1 - Sun, Sep 6
Air Canada Logo
6:00 am - 4:39 pm
BOS
-
YQY
9h 39m
2 stops
Air Canada Logo
5:00 am - 9:53 am
YQY
-
BOS
5h 53m
1 stop
$702Air Canada
Mon, Oct 12 - Sun, Oct 18
Air Canada Logo
7:40 pm - 4:38 pm
BOS
-
YQY
19h 58m
2 stops
Air Canada Logo
5:05 am - 9:55 am
YQY
-
BOS
5h 50m
1 stop
$703Air Canada
Wed, Jul 1 - Mon, Jul 13
Air Canada Logo
10:40 am - 4:20 pm
BOS
-
YQY
4h 40m
1 stop
Air Canada Logo
5:20 pm - 9:27 pm
YQY
-
BOS
5h 07m
1 stop
$704Air Canada
Sun, Sep 20 - Fri, Sep 25
Air Canada Logo
6:00 am - 4:38 pm
BOS
-
YQY
9h 38m
2 stops
Air Canada Logo
5:20 pm - 8:44 am
YQY
-
BOS
16h 24m
2 stops
$706Air Canada
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 cheapest month to fly from Boston to Sydney?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Sydney, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to Sydney is February, where tickets cost $0 (return) on average. On the other hand, the most expensive months are July and October, where the average cost of round-trip tickets is $1,236 and $1,077 respectively.

Good to know

Low seasonSeptember
Cheapest flight$312
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 16% increase in price.
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 $312 for a one-way ticket and $674 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 11046 reviews
6.3Food
7.3Boarding
7.1Comfort
7.8Crew
6.8Entertainment
Airline reviews

The long delay was the worst part of the flight.

6.0 GoodRegan, May 2026
YYZ - YHZ
Read more Air Canada reviews

The long delay was the worst part of the flight.

I bought a ticket from Kayak. When I got to the airport, the was no ticket. I had to pay 5X to get to my destination. No response received from Kayak. I will NEVER use them again.

We travelled from London to Halifax. Customer service was excellent.fron the day we booked until arriving. The gate was only a short frombthe waiting area and walk Boarding was efficiently handled and plane took off on time. The service on the plane was very good. Fool an acceptable drandard Only downside was that the legroom was tight for anybody just over 6ft tall and am usually able to travel without difficulty. I will definitely fly with Air Canada again but next time pay for extr space.

The airplane has been replaced and late night layover have been extended from 3 to 7 and the only compensation was a $15 food voucher after most restaurants have been closed, not helping with children after a 18+ hour international flight

everything was fine. but paying for 1 piece of check-in luggage and denying passengers to board with carry-on luggage which by air line's standards does not fit is not acceptable. when one travels for a longer time one needs to have some essentials

Was notified on a timely manner of any changes, if any, of the flight schedules.

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

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

Information on your arrival and departure airports