$365+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — YQY
Oct 7 — Oct 141
Round-trip
1 adult, Economy
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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
Best
Last-minute
One-way
Cheapest flights from Boston to SydneyExplore 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 7, 2026.
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 7, 2026.
This Air Canada deal was found by Cheapflights users on 9/6. 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.
Fri 10/1610:40 am -
1 stop4h 58m
Mon 10/195:20 pm -
1 stop5h 06m
Deal found 9/6![Air Canada logo]()
$779
This Air Canada deal was found by Cheapflights users on 9/2. 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 9/2810:40 am -
1 stop4h 27m
Wed 9/305:10 pm -
1 stop5h 16m
Deal found 9/2![Air Canada logo]()
$783
This Air Canada deal was found by Cheapflights users on 9/3. 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 10/186:00 am -
2 stops9h 38m
Sun 10/255:45 am -
1 stop5h 18m
Deal found 9/3![Air Canada logo]()
$787
This Air Canada deal was found by Cheapflights users on 9/2. 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 9/296:00 am -
2 stops9h 07m
Thu 10/15:05 am -
2 stops10h 36m
Deal found 9/2![Air Canada logo]()
$799
This Air Canada deal was found by Cheapflights users on 9/5. 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 10/110:40 am -
1 stop4h 32m
Sat 10/35:20 pm -
1 stop5h 06m
Deal found 9/5![Air Canada logo]()
$804
This Air Canada deal was found by Cheapflights users on 9/4. 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 10/1910:40 am -
1 stop4h 58m
Mon 10/265:45 am -
2 stops9h 32m
Deal found 9/4![Air Canada logo]()
$807
Best flights from Boston to SydneyDiscover carefully curated flight deals from Boston to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 7, 2026.
Discover carefully curated flight deals from Boston to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 7, 2026.
This Air Canada deal was found by Cheapflights users on 9/6. 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.
Fri 10/1610:40 am -
1 stop4h 58m
Mon 10/195:20 pm -
1 stop5h 06m
Deal found 9/6![Air Canada logo]()
$779
This Air Canada deal was found by Cheapflights users on 9/2. 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 9/2910:40 am -
1 stop4h 27m
Thu 10/15:20 pm -
1 stop5h 06m
Deal found 9/2![Air Canada logo]()
$783
This Air Canada deal was found by Cheapflights users on 9/2. 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 9/2810:40 am -
1 stop4h 27m
Wed 9/305:05 am -
2 stops10h 36m
Deal found 9/2![Air Canada logo]()
$791
This Air Canada deal was found by Cheapflights users on 9/4. 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 10/1910:40 am -
1 stop4h 58m
Mon 10/265:45 am -
1 stop5h 18m
Deal found 9/4![Air Canada logo]()
$799
This Air Canada deal was found by Cheapflights users on 9/5. 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 10/110:40 am -
1 stop4h 32m
Sat 10/35:20 pm -
1 stop5h 06m
Deal found 9/5![Air Canada logo]()
$804
This Air Canada deal was found by Cheapflights users on 9/4. 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 9/245:50 am -
1 stop9h 17m
Sun 9/275:05 am -
2 stops10h 36m
Deal found 9/4![Air Canada logo]()
$907
Last-minute flights from Boston to SydneyDiscover last-minute flight deals from Boston to Sydney. Data last updated September 7, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Sydney. Data last updated September 7, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 9/2. 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 9/2810:40 am -
1 stop4h 27m
Wed 9/305:10 pm -
1 stop5h 16m
Deal found 9/2![Air Canada logo]()
$783
This Air Canada deal was found by Cheapflights users on 9/2. 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 9/296:00 am -
2 stops9h 07m
Thu 10/15:05 am -
2 stops10h 36m
Deal found 9/2![Air Canada logo]()
$799
This Air Canada deal was found by Cheapflights users on 9/5. 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 10/110:40 am -
1 stop4h 32m
Sat 10/35:20 pm -
1 stop5h 06m
Deal found 9/5![Air Canada logo]()
$804
This Air Canada deal was found by Cheapflights users on 9/6. 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.
Fri 10/1610:40 am -
1 stop4h 58m
Mon 10/195:20 pm -
1 stop5h 06m
Deal found 9/6![Air Canada logo]()
$779
This Air Canada deal was found by Cheapflights users on 9/3. 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 10/186:00 am -
2 stops9h 38m
Sun 10/255:45 am -
1 stop5h 18m
Deal found 9/3![Air Canada logo]()
$787
This Air Canada deal was found by Cheapflights users on 9/4. 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 10/1910:40 am -
1 stop4h 58m
Mon 10/265:45 am -
2 stops9h 32m
Deal found 9/4![Air Canada logo]()
$807
One-way flights from Boston to SydneySearch for one-way flight options from Boston to Sydney. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
Search for one-way flight options from Boston to Sydney. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
This Air Canada deal was found by Cheapflights users on 9/3. 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 10/1510:40 am -
1 stop4h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Air Canada logo]()
$365
This deal was found by Cheapflights users on 9/6. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:40 am -
1 stop4h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Air Canada logo]()
$393
This Air Canada deal was found by Cheapflights users on 9/2. 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 9/187:40 pm -
2 stops19h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Air Canada logo]()
$444
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 September 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $779 (Air Canada) |
One-way from | $365 (Air Canada) |
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 7,457,451 searches. Data last updated September 7, 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
Cheapest round-trip
BostonSydney
BOS Boston Logan Intl - YQY Sydney
BOSYQY
Boston Logan Intl
Thu 10/15
6:00 am-4:38 pm
2 stops9h 38m
Sydney
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$373
Quickest round-trip
BostonSydney
BOS Boston Logan Intl - YQY Sydney
BOSYQY
Boston Logan Intl
Thu 9/17
10:40 am-4:07 pm
1 stop4h 27m
Sydney
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$393
BostonSydney
BOS Boston Logan Intl - YQY Sydney
BOSYQY
Boston Logan Intl
Fri 9/18
7:40 pm-4:07 pm
2 stops19h 27m
Sydney
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$444
BostonSydney
BOS Boston Logan Intl - YQY Sydney
BOSYQY
Boston Logan Intl
Fri 9/18
5:50 am-4:07 pm
1 stop9h 17m
Sydney
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$474
BostonSydney
BOS Boston Logan Intl - YQY Sydney
BOSYQY
Boston Logan Intl
Fri 10/16
10:40 am-4:38 pm
1 stop4h 58m
Sydney
Mon 10/19
5:20 pm-9:26 pm
1 stop5h 06m
$779
BostonSydney
BOS Boston Logan Intl - YQY Sydney
BOSYQY
Boston Logan Intl
Tue 9/29
10:40 am-4:07 pm
1 stop4h 27m
Sydney
Thu 10/1
5:20 pm-9:26 pm
1 stop5h 06m
$783
BostonSydney
BOS Boston Logan Intl - YQY Sydney
BOSYQY
Boston Logan Intl
Mon 9/28
10:40 am-4:07 pm
1 stop4h 27m
Sydney
Wed 9/30
5:05 am-2:41 pm
2 stops10h 36m
$791
BostonSydney
BOS Boston Logan Intl - YQY Sydney
BOSYQY
Boston Logan Intl
Mon 10/19
10:40 am-4:38 pm
1 stop4h 58m
Sydney
Mon 10/26
5:45 am-10:03 am
1 stop5h 18m
$799
BostonSydney
BOS Boston Logan Intl - YQY Sydney
BOSYQY
Boston Logan Intl
Thu 10/1
10:40 am-4:12 pm
1 stop4h 32m
Sydney
Sat 10/3
5:20 pm-9:26 pm
1 stop5h 06m
$804
BostonSydney
BOS Boston Logan Intl - YQY Sydney
BOSYQY
Boston Logan Intl
Thu 9/24
5:50 am-4:07 pm
1 stop9h 17m
Sydney
Sun 9/27
5:05 am-2:41 pm
2 stops10h 36m
$907
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
BOS-YQY
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 7, 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.
Crew
7.8
Comfort
7.1
Overall
7.1
Boarding
7.3
Food
6.3
Entertainment
6.8
Reviews
1 / 20
6.0
GoodAnonymous,Aug 2026
PDX - YVR
Crew
7.8
Comfort
7.1
Overall
7.1
Boarding
7.3
Food
6.3
Entertainment
6.8
Reviews
1 / 20
6.0
GoodAnonymous,Aug 2026
PDX - YVR
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.
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Alternative routes for Boston to Sydney
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Complete your trip
Complete your trip to Sydney by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boston to Sydney by cabin class
Find flights from Boston to Sydney, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boston and Sydney flights
Browse other Boston and Sydney flight options. Last updated on September 7, 2026.
Other flights from Boston
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on September 7, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated September 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$707 | Average$809 | FlexibilityNo cancel fee | On-time67% |