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$332+ Cheap flights from Boston (BOS) to Sydney, NS (YQY)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — YQY
Jun 11 — Jun 181
Thu 6/11
Thu 6/18
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 May 12, 2026.

This Air Canada deal was found by Cheapflights users on 5/11. 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.
Thu 12/103:20 pm
BOS
-
YQY
1 stop6h 11m
Air Canada
Sat 12/125:45 am
YQY
-
BOS
2 stops9h 10m
Air Canada
Deal found 5/11$674
This Air Canada deal was found by Cheapflights users on 5/7. 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 9/2410:40 am
BOS
-
YQY
1 stop4h 58m
Air Canada
Sun 9/275:05 am
YQY
-
BOS
1 stop5h 50m
Air Canada
Deal found 5/7$679
This Air Canada deal was found by Cheapflights users on 5/8. 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 10/16:00 am
BOS
-
YQY
2 stops9h 38m
Air Canada
Tue 10/65:20 pm
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 5/8$682
This Air Canada deal was found by Cheapflights users on 5/11. 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.
Wed 7/110:40 am
BOS
-
YQY
1 stop4h 40m
Air Canada
Fri 7/105:00 am
YQY
-
BOS
1 stop5h 53m
Air Canada
Deal found 5/11$709
This Air Canada deal was found by Cheapflights users on 5/10. 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 6/55:10 am
BOS
-
YQY
2 stops10h 29m
Air Canada
Mon 6/85:20 pm
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 5/10$712
This Air Canada deal was found by Cheapflights users on 5/11. 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.
Sat 7/44:55 pm
BOS
-
YQY
1 stop6h 12m
Air Canada
Sat 7/115:00 am
YQY
-
BOS
1 stop5h 53m
Air Canada
Deal found 5/11$714
This Air Canada deal was found by Cheapflights users on 5/11. 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.
Wed 7/110:40 am
BOS
-
YQY
1 stop4h 40m
Air Canada
Tue 7/145:20 pm
YQY
-
BOS
2 stops16h 24m
Air Canada
Deal found 5/11$728

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 May 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$674
(Air Canada)

One-way from

$332
(Air Canada)

Popular in

July

Cheapest in

September

Average price

$771
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
One-way flight from Boston Logan Intl to Sydney
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 12, 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

Thu 9/24

10:40 am-4:38 pm

1 stop4h 58m

Sydney

Sun 9/27

5:05 am-9:55 am

1 stop5h 50m

$679

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 6/5

10:35 am-4:39 pm

1 stop5h 04m

Sydney

Mon 6/8

5:20 pm-9:27 pm

1 stop5h 07m

$704
Quickest round-trip

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Tue 6/9

10:35 am-4:14 pm

1 stop4h 39m

Sydney

Tue 6/16

5:20 pm-9:27 pm

1 stop5h 07m

$704

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Wed 7/1

10:40 am-4:20 pm

1 stop4h 40m

Sydney

Tue 7/14

5:20 pm-9:27 pm

1 stop5h 07m

$704

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Wed 7/1

10:40 am-4:20 pm

1 stop4h 40m

Sydney

Mon 7/13

5:20 pm-9:27 pm

1 stop5h 07m

$704

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 10/11

10:50 am-12:45 am

1 stop12h 55m

Sydney

Fri 10/16

5:20 pm-9:27 pm

1 stop5h 07m

$704

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Thu 10/1

6:00 am-4:38 pm

2 stops9h 38m

Sydney

Tue 10/6

5:20 pm-8:44 am

2 stops16h 24m

$706

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 8/14

10:40 am-4:39 pm

1 stop4h 59m

Sydney

Sun 8/16

5:00 am-9:53 am

1 stop5h 53m

$709
Cheapest one-way

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sat 7/11

4:55 pm-12:07 am

1 stop6h 12m

$332
Quickest one-way

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 7/12

10:40 am-4:14 pm

1 stop4h 34m

$383

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/9

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 May 12, 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
11,019 reviews

Entertainment

6.8

Crew

7.8

Food

6.3

Comfort

7.1

Boarding

7.3

Overall

7.1

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
11,019 reviews
Air Canada
7.1
Good
11,019 reviews

Entertainment

6.8

Crew

7.8

Food

6.3

Comfort

7.1

Boarding

7.3

Overall

7.1

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 $679, Air Canada can have you in Sydney, Nova Scotia from Boston in 4h 58m. 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 $682 on this airline. Air Canada is currently priced 24% 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 May 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$682Average$833FlexibilityNo cancel feeOn-time67%

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