HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Sydney

$340+ 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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — YQY
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to Sydney with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 August 18, 2025.

Round-trip from

$722
(Air Canada)

One-way from

$340
(Air Canada)
From Boston Logan Intl to Sydney
Search Deals
One-way flight 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 August 18, 2025.

This Air Canada deal was found by Cheapflights users on 8/16. 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 9/234:45 pmBOS - YQY
1 stop6h 24mAir Canada
Tue 9/304:30 pmYQY - BOS
1 stop5h 55mAir Canada
Deal found 8/16$722
This Mytrip deal was found by Cheapflights users on 8/17. 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.
Thu 9/43:30 pmBOS - YQY
2 stops18h 00mMultiple Airlines
Wed 9/108:00 amYQY - BOS
3 stops40h 57mMultiple Airlines
Deal found 8/17$735
This Air Canada deal was found by Cheapflights users on 8/15. 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 9/146:00 amBOS - YQY
2 stops17h 09mAir Canada
Sun 9/215:15 amYQY - BOS
1 stop5h 40mAir Canada
Deal found 8/15$740
This Gotogate deal was found by Cheapflights users on 8/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/510:20 amBOS - YQY
1 stop4h 28mAir Canada
Thu 9/115:15 amYQY - BOS
1 stop5h 40mAir Canada
Deal found 8/16$746
This Air Canada deal was found by Cheapflights users on 8/17. 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 9/910:20 amBOS - YQY
1 stop4h 28mAir Canada
Tue 9/165:15 amYQY - BOS
1 stop5h 40mAir Canada
Deal found 8/17$751
This Air Canada deal was found by Cheapflights users on 8/17. 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 10/110:20 amBOS - YQY
1 stop4h 28mAir Canada
Wed 10/84:30 pmYQY - BOS
2 stops18h 25mAir Canada
Deal found 8/17$755
This Air Canada deal was found by Cheapflights users on 8/17. 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 9/164:45 pmBOS - YQY
2 stops22h 03mAir Canada
Tue 9/235:15 amYQY - BOS
2 stops17h 10mAir Canada
Deal found 8/17$763
This Air Canada deal was found by Cheapflights users on 8/16. 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 10/116:55 pmBOS - YQY
2 stops19h 53mAir Canada
Sat 10/184:30 pmYQY - BOS
1 stop5h 55mAir Canada
Deal found 8/16$784

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 August 18, 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

Wed 10/1

10:20 am-3:48 pm

1 stop4h 28m

Sydney

Wed 10/8

5:15 am-11:29 am

1 stop7h 14m

$722

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Tue 9/23

4:45 pm-12:09 am

1 stop6h 24m

Sydney

Tue 9/30

4:30 pm-9:25 pm

1 stop5h 55m

$722

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Thu 9/4

3:30 pm-10:30 am

2 stops18h 00m

Sydney

Wed 9/10

8:00 am-11:57 pm

3 stops40h 57m

$735

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Tue 9/16

6:30 pm-12:09 am

2 stops28h 39m

Sydney

Tue 9/23

5:15 am-9:55 am

1 stop5h 40m

$740

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 9/14

6:00 am-12:09 am

1 stop17h 09m

Sydney

Sun 9/21

5:15 am-9:55 am

1 stop5h 40m

$740

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Thu 9/18

6:00 am-12:09 am

2 stops17h 09m

Sydney

Sun 9/21

5:15 am-9:55 am

1 stop5h 40m

$740

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 1/9

3:40 pm-10:53 pm

1 stop6h 13m

Sydney

Sun 1/18

5:30 am-9:32 am

1 stop5h 02m

$744

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sat 1/17

10:45 am-10:53 pm

2 stops11h 08m

$340

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sat 1/17

6:00 am-10:53 pm

3 stops15h 53m

$675

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

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 August 18, 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
9,992 reviews

Crew

7.8

Boarding

7.3

Overall

7.1

Entertainment

6.8

Comfort

7.1

Food

6.3

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
9,992 reviews
Air Canada
7.1
Good
9,992 reviews

Crew

7.8

Boarding

7.3

Overall

7.1

Entertainment

6.8

Comfort

7.1

Food

6.3

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 $722, 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 $518 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

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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$518Average$804FlexibilityNo cancel feeOn-time67%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.