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$697+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — YQY
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$615
(Mytrip)
From Boston Logan Intl to Sydney
Search Deals

Find 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 September 11, 2025.

This Mytrip deal was found by Cheapflights users on 9/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2612:15 pmBOS - YQY
2 stops29h 36mMultiple Airlines
Sat 10/47:40 pmYQY - BOS
2 stops23h 30mMultiple Airlines
Deal found 9/10$697
This Mytrip deal was found by Cheapflights users on 9/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/283:50 pmBOS - YQY
3 stops21h 40mMultiple Airlines
Sat 10/47:40 pmYQY - BOS
2 stops23h 30mMultiple Airlines
Deal found 9/9$717
This Air Canada deal was found by Cheapflights users on 9/11. 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.
Fri 10/1710:20 amBOS - YQY
1 stop4h 28mAir Canada
Fri 10/244:35 pmYQY - BOS
1 stop5h 51mAir Canada
Deal found 9/11$744
This Air Canada deal was found by Cheapflights users on 9/11. 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 10/184:45 pmBOS - YQY
1 stop6h 50mAir Canada
Fri 10/245:15 amYQY - BOS
1 stop11h 44mAir Canada
Deal found 9/11$746
This Air Canada deal was found by Cheapflights users on 9/11. 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 10/184:45 pmBOS - YQY
1 stop6h 50mAir Canada
Thu 10/234:35 pmYQY - BOS
2 stops19h 54mAir Canada
Deal found 9/11$755
This Air Canada deal was found by Cheapflights users on 9/9. 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.
Sun 9/2812:15 pmBOS - YQY
1 stop10h 54mAir Canada
Sat 10/44:30 pmYQY - BOS
1 stop5h 55mAir Canada
Deal found 9/9$767
This Air Canada deal was found by Cheapflights users on 9/10. 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 10/1710:20 amBOS - YQY
1 stop4h 28mAir Canada
Tue 10/214:35 pmYQY - BOS
1 stop5h 51mAir Canada
Deal found 9/10$773
This Air Canada deal was found by Cheapflights users on 9/11. 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 10/146:00 amBOS - YQY
1 stop8h 48mAir Canada
Fri 10/244:35 pmYQY - BOS
1 stop5h 51mAir Canada
Deal found 9/11$778
This Air Canada deal was found by Cheapflights users on 9/11. 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 10/184:45 pmBOS - YQY
1 stop6h 50mAir Canada
Sat 10/254:35 pmYQY - BOS
2 stops20h 37mAir Canada
Deal found 9/11$779
This Air Canada deal was found by Cheapflights users on 9/11. 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 10/184:45 pmBOS - YQY
1 stop6h 50mAir Canada
Tue 10/214:35 pmYQY - BOS
2 stops18h 20mAir Canada
Deal found 9/11$780

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 September 11, 2025.
Use the filters below to find and compare flights from Boston to Sydney that are best for you.

Fly from

Boston

Fly to

Sydney

Route

Depart

Return

Price

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 9/26

12:15 pm-6:51 pm

2 stops29h 36m

Sydney

Sat 10/4

7:40 pm-6:10 pm

2 stops23h 30m

$697

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 9/28

3:50 pm-2:30 pm

3 stops21h 40m

Sydney

Sat 10/4

7:40 pm-6:10 pm

2 stops23h 30m

$717

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 10/17

10:20 am-3:48 pm

1 stop4h 28m

Sydney

Fri 10/24

4:35 pm-9:26 pm

1 stop5h 51m

$744

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sat 10/18

4:45 pm-12:35 am

1 stop6h 50m

Sydney

Fri 10/24

4:35 pm-9:55 am

2 stops18h 20m

$746

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sat 10/18

4:45 pm-12:35 am

1 stop6h 50m

Sydney

Thu 10/23

4:35 pm-11:29 am

2 stops19h 54m

$755

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 9/28

12:15 pm-12:09 am

1 stop10h 54m

Sydney

Sat 10/4

4:30 pm-9:25 pm

1 stop5h 55m

$767

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 10/17

10:20 am-3:48 pm

1 stop4h 28m

Sydney

Tue 10/21

4:35 pm-9:26 pm

1 stop5h 51m

$773

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 10/17

10:20 am-3:48 pm

1 stop4h 28m

Sydney

Thu 10/23

4:35 pm-9:25 pm

1 stop5h 50m

$773

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 10/17

10:20 am-3:48 pm

1 stop4h 28m

Sydney

Wed 10/22

4:35 pm-9:25 pm

1 stop5h 50m

$773

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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 September 11, 2025.
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
10,000 reviews

Food

6.3

Boarding

7.3

Overall

7.1

Entertainment

6.8

Crew

7.8

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2024

YYT - YHZ

No leg room plane was so small no room to move no room to sit squat in your seat my legs were so swollen up at the end of flight
Air Canada
7.1
Good
10,000 reviews
Air Canada
7.1
Good
10,000 reviews

Food

6.3

Boarding

7.3

Overall

7.1

Entertainment

6.8

Crew

7.8

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2024

YYT - YHZ

No leg room plane was so small no room to move no room to sit squat in your seat my legs were so swollen up at the end of flight

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 $744, Air Canada can have you in Sydney, Nova Scotia from Boston in 4h 28m. 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 $587 on this airline.

  • 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

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$587Average$918FlexibilityNo cancel feeOn-time67%

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