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$644+ Cheap flights from Boston (BOS) to Sydney, NS (YQY)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — YQY
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
1 adult, Economy
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Cheap flight deals from Boston to Sydney

Cheapest flights from Boston to Sydney
Explore the most affordable flight options available from Boston to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2026.

This Air Canada deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/233:35 pm
BOS
-
YQY
1 stop6h 49m
Air Canada
Sat 5/25:20 pm
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 3/8$644
This Air Canada deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/210:35 am
BOS
-
YQY
1 stop5h 04m
Air Canada
Wed 7/15:00 am
YQY
-
BOS
1 stop5h 53m
Air Canada
Deal found 3/8$649
This Air Canada deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2210:45 am
BOS
-
YQY
2 stops11h 39m
Air Canada
Sat 5/25:20 pm
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 3/8$652
This Air Canada deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:00 pm
BOS
-
YQY
1 stop6h 14m
Air Canada
Wed 7/15:00 am
YQY
-
BOS
1 stop5h 53m
Air Canada
Deal found 3/8$654
This Air Canada deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:10 am
BOS
-
YQY
2 stops10h 29m
Air Canada
Tue 6/305:00 am
YQY
-
BOS
1 stop5h 53m
Air Canada
Deal found 3/8$657
This Air Canada deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:35 am
BOS
-
YQY
1 stop5h 04m
Air Canada
Sun 5/105:00 am
YQY
-
BOS
1 stop5h 54m
Air Canada
Deal found 3/10$659
This Air Canada deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2410:45 am
BOS
-
YQY
2 stops11h 39m
Air Canada
Fri 5/15:20 pm
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 3/10$663
This Air Canada deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/175:00 pm
BOS
-
YQY
1 stop6h 09m
Air Canada
Sun 6/215:00 am
YQY
-
BOS
1 stop5h 53m
Air Canada
Deal found 3/9$664
This Air Canada deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/210:40 am
BOS
-
YQY
1 stop4h 59m
Air Canada
Tue 7/285:20 pm
YQY
-
BOS
2 stops16h 24m
Air Canada
Deal found 3/8$668
This Air Canada deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/265:00 pm
BOS
-
YQY
1 stop6h 14m
Air Canada
Wed 5/275:20 pm
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 3/11$669

Find flight deals from Boston to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Sydney (YQY). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$644
(Air Canada)

Popular in

October

Cheapest in

May

Average price

$794
Provider with most accurate pricing for Boston Logan Intl-Sydney flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Sydney flights.
Search Deals
From Boston Logan Intl to Sydney
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 13, 2026.
Use the filters below to find and compare flights from Boston to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Mon 4/27

3:35 pm-11:24 pm

1 stop6h 49m

Sydney

Wed 4/29

5:30 am-9:49 am

1 stop5h 19m

$644

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Tue 4/7

3:35 pm-11:24 pm

1 stop6h 49m

Sydney

Tue 4/14

5:30 am-9:49 am

1 stop5h 19m

$644

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sat 6/13

10:35 am-4:39 pm

1 stop5h 04m

Sydney

Mon 6/22

5:20 pm-9:27 pm

1 stop5h 07m

$644
Quickest round-trip

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Wed 7/15

10:40 am-4:39 pm

1 stop4h 59m

Sydney

Tue 7/21

5:20 pm-9:27 pm

1 stop5h 07m

$644

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Thu 5/7

5:10 am-4:39 pm

2 stops10h 29m

Sydney

Sun 5/10

5:00 am-9:54 am

1 stop5h 54m

$657

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 6/5

5:10 am-4:39 pm

2 stops10h 29m

Sydney

Sun 6/28

5:00 am-11:52 am

1 stop7h 52m

$657

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Tue 5/26

5:00 pm-12:14 am

1 stop6h 14m

Sydney

Wed 5/27

5:20 pm-9:27 pm

1 stop5h 07m

$669

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 7/17

7:40 pm-4:39 pm

2 stops19h 59m

Sydney

Mon 7/20

5:20 pm-9:27 pm

1 stop5h 07m

$678

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 5/31

12:30 pm-12:09 am

1 stop10h 39m

Sydney

Tue 6/30

5:00 am-9:53 am

1 stop5h 53m

$679

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 4/26

10:45 am-11:24 pm

2 stops11h 39m

Sydney

Thu 4/30

5:30 am-10:39 pm

2 stops18h 09m

$685

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

Sorted by cheapest first

Compare providers for flights from Boston to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Sydney in March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Sydney, Nova Scotia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Sydney, Nova Scotia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Sydney, Nova Scotia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Sydney, Nova Scotia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Sydney, Nova Scotia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated March 13, 2026.
Read reviews from past customers who have flown Air Canada from Boston to Sydney. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,800 reviews

Entertainment

6.8

Comfort

7.1

Crew

7.8

Boarding

7.3

Overall

7.1

Food

6.3

Reviews

1 / 20
8.0
Excellent

Dr vandana,Feb 2026

SFO - YYC

It was good, the lounge facilities can be better with some vegetarian options. Overall good
Air Canada
7.1
Good
10,800 reviews
Air Canada
7.1
Good
10,800 reviews

Entertainment

6.8

Comfort

7.1

Crew

7.8

Boarding

7.3

Overall

7.1

Food

6.3

Reviews

1 / 20
8.0
Excellent

Dr vandana,Feb 2026

SFO - YYC

It was good, the lounge facilities can be better with some vegetarian options. Overall good

Related info for your journey

Find useful and relevant information for your journey from Boston to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boston to Sydney, Nova Scotia?

    For as low as $644, Air Canada can have you in Sydney, Nova Scotia from Boston in 4h 59m. Boston and Sydney, Nova Scotia are separated by a distance of 601 mi.

  • What is the cheapest airline to fly from Boston to Sydney, Nova Scotia round-trip?

    Our cheapest airline available from Boston to Sydney, Nova Scotia is Air Canada. Our recent data shows that you can find tickets from as low as $644 on this airline. Air Canada is currently priced 23% below the average price you’ll pay for this route.

  • Can I find deals for flights from Boston to Sydney that include hotel bookings?

    Yes. In addition to deals on Boston to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Sydney.

  • Can I find deals for business class flights from Boston to Sydney?

    Yes. Cheapflights offers flight deals from Boston to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Boston to Sydney

Discover the top airline that operate flights from Boston to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$644Average$915FlexibilityNo cancel feeOn-time67%

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