BOS - YQY

$343 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 7/5. 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
$684
Typical prices: $879-$774
Air Canada
Sat 6/13Mon 6/22
BOS - YQY • 1 stop
Cheapest one-way
$343
Air Canada
Sun 7/5
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.
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Top layover airports
Cheapest • Avg $921 (round-trip)
Shortest trip • 5h 06m (one-way)
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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

Sat, Jun 13 - Mon, Jun 22
Air Canada Logo
10:35 am - 4:39 pm
BOS
-
YQY
5h 04m
1 stop
Air Canada Logo
5:20 pm - 9:27 pm
YQY
-
BOS
5h 07m
1 stop
$684Air Canada
Thu, Jun 11 - Sat, Jun 20
Air Canada Logo
5:00 pm - 12:09 am
BOS
-
YQY
6h 09m
1 stop
Air Canada Logo
5:20 pm - 9:27 pm
YQY
-
BOS
5h 07m
1 stop
$689Air Canada
Wed, Jun 3 - Sat, Jun 6
Air Canada Logo
5:10 am - 4:39 pm
BOS
-
YQY
10h 29m
2 stops
Air Canada Logo
5:20 pm - 9:27 pm
YQY
-
BOS
5h 07m
1 stop
$692Air Canada
Thu, Jun 11 - Sun, Jun 21
Air Canada Logo
5:00 pm - 12:09 am
BOS
-
YQY
6h 09m
1 stop
Air Canada Logo
5:00 am - 9:53 am
YQY
-
BOS
5h 53m
1 stop
$693Air Canada
Sat, Jun 13 - Wed, Jun 24
Air Canada Logo
5:10 am - 4:39 pm
BOS
-
YQY
10h 29m
2 stops
Air Canada Logo
5:00 am - 9:53 am
YQY
-
BOS
5h 53m
1 stop
$697Air Canada
Fri, Jun 12 - Sat, Jun 20
Air Canada Logo
6:55 pm - 4:39 pm
BOS
-
YQY
20h 44m
2 stops
Air Canada Logo
5:20 pm - 9:27 pm
YQY
-
BOS
5h 07m
1 stop
$708Air Canada
Wed, Jun 17 - Sat, Jun 20
Air Canada Logo
10:35 am - 4:39 pm
BOS
-
YQY
5h 04m
1 stop
Air Canada Logo
5:20 pm - 9:27 pm
YQY
-
BOS
5h 07m
1 stop
$710Air Canada
Fri, Jun 12 - Tue, Jun 23
Air Canada Logo
6:55 pm - 4:39 pm
BOS
-
YQY
20h 44m
2 stops
Air Canada Logo
5:00 am - 9:53 am
YQY
-
BOS
5h 53m
1 stop
$712Air Canada
Sun, Jun 14 - Mon, Jun 22
Air Canada Logo
10:45 am - 12:09 am
BOS
-
YQY
12h 24m
1 stop
Air Canada Logo
5:20 pm - 9:27 pm
YQY
-
BOS
5h 07m
1 stop
$713Air Canada
Fri, May 8 - Mon, May 11
Air Canada Logo
5:50 am - 4:14 pm
BOS
-
YQY
9h 24m
1 stop
Air Canada Logo
5:20 pm - 9:27 pm
YQY
-
BOS
5h 07m
1 stop
$714Air 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.

How much is a round-trip flight from Boston to Sydney, Nova Scotia?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Boston to Sydney, Nova Scotia departing in June.

Good to know

Low seasonMay
Cheapest flight$343
Best time to beat the crowds with an average 37% drop in price.
Most popular time to fly with an average 24% 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 $343 for a one-way ticket and $684 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 10843 reviews
7.1Comfort
6.3Food
7.3Boarding
7.8Crew
6.8Entertainment
Airline reviews

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

2.0 MediocreMohamed, Jan 2026
YUL - YHZ
Read more Air Canada reviews

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

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 you need to know for your flight from Boston to Sydney

Information on your arrival and departure airports