HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Sydney

$339+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — YQY
Aug 10 — Aug 171
Mon 8/10
Mon 8/17
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

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 July 11, 2026.

This Gotogate deal was found by Cheapflights users on 7/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/2610:40 am
BOS
-
YQY
1 stop4h 34m
Air Canada
Sat 8/15:10 pm
YQY
-
BOS
1 stop5h 17m
Air Canada
Deal found 7/7$625
This Air Canada deal was found by Cheapflights users on 7/7. 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 8/2710:40 am
BOS
-
YQY
1 stop4h 40m
Air Canada
Mon 9/75:20 pm
YQY
-
BOS
1 stop5h 06m
Air Canada
Deal found 7/7$726
This Air Canada deal was found by Cheapflights users on 7/6. 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 8/24:55 pm
BOS
-
YQY
1 stop6h 17m
Air Canada
Thu 8/65:10 pm
YQY
-
BOS
1 stop5h 17m
Air Canada
Deal found 7/6$731
This Air Canada deal was found by Cheapflights users on 7/7. 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 8/64:55 pm
BOS
-
YQY
1 stop6h 17m
Air Canada
Thu 8/135:05 am
YQY
-
BOS
1 stop7h 47m
Air Canada
Deal found 7/7$736
This Air Canada deal was found by Cheapflights users on 7/8. 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.
Sat 8/227:40 pm
BOS
-
YQY
2 stops19h 40m
Air Canada
Sat 8/295:10 pm
YQY
-
BOS
1 stop5h 17m
Air Canada
Deal found 7/8$749
This Air Canada deal was found by Cheapflights users on 7/7. 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.
Sat 8/17:40 pm
BOS
-
YQY
2 stops19h 34m
Air Canada
Sat 8/85:05 am
YQY
-
BOS
1 stop7h 47m
Air Canada
Deal found 7/7$754
This Air Canada deal was found by Cheapflights users on 7/8. 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 10/146:00 am
BOS
-
YQY
2 stops9h 38m
Air Canada
Sat 10/175:20 pm
YQY
-
BOS
2 stops16h 32m
Air Canada
Deal found 7/8$757
This Air Canada deal was found by Cheapflights users on 7/7. 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.
Fri 8/286:00 am
BOS
-
YQY
2 stops9h 20m
Air Canada
Mon 9/75:20 pm
YQY
-
BOS
2 stops17h 35m
Air Canada
Deal found 7/7$766

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 July 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$625
(Gotogate)

One-way from

$339
(Air Canada)
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

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 July 11, 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

Sun 7/26

10:40 am-4:14 pm

1 stop4h 34m

Sydney

Sat 8/1

5:10 pm-9:27 pm

1 stop5h 17m

$625
Quickest round-trip

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Thu 8/27

10:40 am-4:20 pm

1 stop4h 40m

Sydney

Mon 9/7

5:20 pm-9:26 pm

1 stop5h 06m

$726

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Thu 10/15

10:40 am-4:38 pm

1 stop4h 58m

Sydney

Mon 10/19

5:20 pm-9:26 pm

1 stop5h 06m

$726

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Wed 10/14

10:40 am-4:38 pm

1 stop4h 58m

Sydney

Sat 10/17

5:20 pm-9:26 pm

1 stop5h 06m

$726

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sat 8/29

10:40 am-4:20 pm

1 stop4h 40m

Sydney

Sun 9/6

5:20 pm-9:27 pm

1 stop5h 07m

$726

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 9/20

10:40 am-4:38 pm

1 stop4h 58m

Sydney

Thu 9/24

5:20 pm-9:26 pm

1 stop5h 06m

$726

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 10/2

10:40 am-4:38 pm

1 stop4h 58m

Sydney

Mon 10/5

5:20 pm-9:26 pm

1 stop5h 06m

$726
Cheapest one-way

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Thu 10/15

10:40 am-4:38 pm

1 stop4h 58m

$339

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Tue 10/6

10:40 am-4:38 pm

1 stop4h 58m

$339
Quickest one-way

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 8/9

10:40 am-4:20 pm

1 stop4h 40m

$339

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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 July.
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 July 11, 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
11,327 reviews

Entertainment

6.8

Food

6.3

Overall

7.1

Crew

7.8

Boarding

7.3

Comfort

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
11,327 reviews
Air Canada
7.1
Good
11,327 reviews

Entertainment

6.8

Food

6.3

Overall

7.1

Crew

7.8

Boarding

7.3

Comfort

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 $625, Air Canada can have you in Sydney, Nova Scotia from Boston in 4h 34m. 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.

  • 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 July 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$682Average$816FlexibilityNo 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.