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 29/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SYD
30 Nov — 7 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to Sydney Kingsford Smith are usually found in March or September, booked 38 days in advance, depart on a Tuesday or Saturday and return on a Sunday
Find flight deals from Boston to Sydney
Enter your travel dates to find the best prices.
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 31 October 2025.
Sun 16/1115:40BOS - SYD
2 stops25h 55mAir Canada
Fri 16/111:20SYD - BOS
3 stops38h 12mAir Canada
Deal found 30/10$1,808
Wed 5/1108:15BOS - SYD
1 stop32h 45mQantas Airways
Fri 16/111:20SYD - BOS
1 stop21h 06mQantas Airways
Deal found 30/10$1,817
Fri 14/1117:45BOS - SYD
1 stop23h 15mQantas Airways
Mon 8/1211:20SYD - BOS
1 stop22h 11mQantas Airways
Deal found 31/10$1,818
Thu 6/1115:43BOS - SYD
2 stops36h 22mQantas Airways
Sat 15/1114:05SYD - BOS
1 stop24h 57mQantas Airways
Deal found 29/10$1,820
Sun 2/1108:15BOS - SYD
1 stop32h 45mQantas Airways
Tue 18/1117:30SYD - BOS
2 stops28h 48mQantas Airways
Deal found 29/10$1,824
Sat 1/1112:00BOS - SYD
2 stops34h 00mQantas Airways
Sat 15/1114:05SYD - BOS
1 stop22h 25mQantas Airways
Deal found 30/10$1,827
Fri 31/1008:01BOS - SYD
1 stop33h 59mAmerican Airlines
Fri 14/1111:20SYD - BOS
2 stops23h 40mAmerican Airlines
Deal found 30/10$1,830
Thu 30/1017:44BOS - SYD
2 stops24h 16mAmerican Airlines
Thu 13/1111:20SYD - BOS
2 stops23h 40mAmerican Airlines
Deal found 29/10$1,836
Mon 10/1108:15BOS - SYD
1 stop32h 45mQantas Airways
Wed 19/1111:20SYD - BOS
1 stop25h 58mQantas Airways
Deal found 30/10$1,839
Thu 6/1114:30BOS - SYD
2 stops26h 30mAmerican Airlines
Wed 26/1111:20SYD - BOS
1 stop21h 30mAmerican Airlines
Deal found 30/10$1,843
Mon 1/1212:00BOS - SYD
1 stop29h 00mAmerican Airlines
Mon 22/1211:20SYD - BOS
2 stops23h 59mAmerican Airlines
Deal found 30/10$1,846
Sun 16/1112:00BOS - SYD
1 stop29h 00mAmerican Airlines
Fri 16/111:20SYD - BOS
1 stop22h 36mAmerican Airlines
Deal found 28/10$1,847
Best flights from Boston to Sydney
Discover carefully curated flight deals from Boston to Sydney that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 October 2025.
Fri 20/213:50BOS - SYD
1 stop27h 25mUnited Airlines
Fri 6/312:10SYD - BOS
1 stop23h 30mUnited Airlines
Deal found 29/10$1,875
Fri 3/407:00BOS - SYD
1 stop33h 35mDelta
Sat 18/409:25SYD - BOS
1 stop24h 13mDelta
Deal found 30/10$1,876
Fri 3/408:00BOS - SYD
2 stops33h 00mUnited Airlines
Sat 18/410:20SYD - BOS
1 stop22h 35mUnited Airlines
Deal found 30/10$1,876
Thu 2/406:00BOS - SYD
2 stops35h 00mUnited Airlines
Fri 17/410:20SYD - BOS
2 stops27h 34mUnited Airlines
Deal found 30/10$1,876
Sat 21/218:07BOS - SYD
1 stop22h 58mUnited Airlines
Sun 8/310:20SYD - BOS
1 stop21h 21mUnited Airlines
Deal found 29/10$1,899
Fri 20/218:07BOS - SYD
1 stop22h 58mUnited Airlines
Mon 9/310:20SYD - BOS
1 stop21h 21mUnited Airlines
Deal found 29/10$1,899
Mon 1/1211:59BOS - SYD
2 stops27h 01mUnited Airlines
Mon 22/1211:20SYD - BOS
2 stops22h 52mUnited Airlines
Deal found 30/10$1,920
Mon 9/317:50BOS - SYD
1 stop24h 25mUnited Airlines
Wed 18/312:10SYD - BOS
1 stop22h 30mUnited Airlines
Deal found 29/10$1,923
Mon 23/218:07BOS - SYD
1 stop22h 58mUnited Airlines
Sun 8/310:20SYD - BOS
1 stop21h 21mUnited Airlines
Deal found 29/10$1,923
Sun 1/313:50BOS - SYD
1 stop27h 25mUnited Airlines
Sun 15/310:20SYD - BOS
1 stop21h 21mUnited Airlines
Deal found 29/10$1,923
Wed 11/317:00BOS - SYD
1 stop23h 00mUnited Airlines
Mon 16/311:50SYD - BOS
1 stop21h 23mUnited Airlines
Deal found 29/10$1,923
Mon 9/317:00BOS - SYD
1 stop23h 00mUnited Airlines
Sun 15/312:10SYD - BOS
1 stop27h 39mUnited Airlines
Deal found 29/10$1,923
Last-minute flights from Boston to Sydney
Discover last-minute flight deals from Boston to Sydney. Data last updated 31 October 2025 and is based on user searches.
Thu 30/1017:44BOS - SYD
2 stops24h 16mAmerican Airlines
Thu 13/1111:20SYD - BOS
1 stop34h 58mAmerican Airlines
Deal found 29/10$1,836
Fri 31/1008:01BOS - SYD
1 stop33h 59mAmerican Airlines
Fri 14/1111:20SYD - BOS
2 stops23h 40mAmerican Airlines
Deal found 30/10$1,830
Sat 1/1112:00BOS - SYD
2 stops34h 00mQantas Airways
Sat 15/1114:05SYD - BOS
1 stop22h 25mQantas Airways
Deal found 30/10$1,827
Sun 2/1108:15BOS - SYD
1 stop32h 45mQantas Airways
Tue 18/1117:30SYD - BOS
2 stops28h 48mQantas Airways
Deal found 29/10$1,824
Wed 5/1108:15BOS - SYD
1 stop32h 45mQantas Airways
Fri 16/111:20SYD - BOS
1 stop21h 06mQantas Airways
Deal found 30/10$1,817
Thu 6/1115:43BOS - SYD
2 stops36h 22mQantas Airways
Sat 15/1114:05SYD - BOS
1 stop24h 57mQantas Airways
Deal found 29/10$1,820
Thu 6/1114:30BOS - SYD
2 stops26h 30mAmerican Airlines
Wed 26/1111:20SYD - BOS
1 stop21h 30mAmerican Airlines
Deal found 30/10$1,843
Mon 10/1108:15BOS - SYD
1 stop32h 45mQantas Airways
Wed 19/1111:20SYD - BOS
1 stop25h 58mQantas Airways
Deal found 30/10$1,839
Fri 14/1117:45BOS - SYD
1 stop23h 15mQantas Airways
Mon 8/1211:20SYD - BOS
1 stop22h 11mQantas Airways
Deal found 31/10$1,818
Sun 16/1115:40BOS - SYD
2 stops25h 55mAir Canada
Fri 16/111:20SYD - BOS
3 stops38h 12mAir Canada
Deal found 30/10$1,808
Sun 16/1112:00BOS - SYD
1 stop29h 00mAmerican Airlines
Fri 16/111:20SYD - BOS
1 stop22h 36mAmerican Airlines
Deal found 28/10$1,847
One-way flights from Boston to Sydney
Search for one-way flight options from Boston to Sydney. Find affordable one-way fares based on user searches. Data last updated 31 October 2025.
Sat 29/1110:15BOS - SYD
2 stops55h 20mAir Canada
Deal found 30/10$764
Sun 30/1110:15BOS - SYD
2 stops31h 20mAir Canada
Deal found 28/10$769
Tue 10/206:15BOS - SYD
2 stops35h 20mAir Canada
Deal found 30/10$795
Fri 28/1118:40BOS - SYD
2 stops44h 15mAir Canada
Deal found 29/10$834
Thu 20/1110:15BOS - SYD
2 stops31h 20mAir Canada
Deal found 28/10$836
Thu 12/210:15BOS - SYD
2 stops31h 20mAir Canada
Deal found 30/10$850
Mon 10/1117:45BOS - SYD
1 stop23h 15mQantas Airways
Deal found 30/10$854
Sat 21/305:30BOS - SYD
3 stops36h 05mAir Canada
Deal found 29/10$859
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 (SYD). 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 31 October 2025.
Customise 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 647,157 searches. Data last updated 31 October 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 - SYD
BOSSYD
Boston Logan Intl
Fri 20/2
13:50-09:15
1 stop27h 25m
Sydney Kingsford Smith
Fri 6/3
12:10-19:40
1 stop23h 30m
$1,875
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Fri 3/4
07:00-07:35
1 stop33h 35m
Sydney Kingsford Smith
Sat 18/4
09:25-19:38
1 stop24h 13m
$1,876
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Fri 3/4
08:00-08:00
2 stops33h 00m
Sydney Kingsford Smith
Sat 18/4
10:20-18:55
1 stop22h 35m
$1,876
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Thu 2/4
06:00-08:00
2 stops35h 00m
Sydney Kingsford Smith
Fri 17/4
10:20-23:54
2 stops27h 34m
$1,876
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Sat 21/2
18:07-09:05
1 stop22h 58m
Sydney Kingsford Smith
Sun 8/3
10:20-15:41
1 stop21h 21m
$1,899
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Fri 20/2
18:07-09:05
1 stop22h 58m
Sydney Kingsford Smith
Mon 9/3
10:20-16:41
1 stop21h 21m
$1,899
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Mon 1/12
11:59-07:00
2 stops27h 01m
Sydney Kingsford Smith
Mon 22/12
11:20-18:12
2 stops22h 52m
$1,920
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Mon 9/3
17:50-09:15
1 stop24h 25m
Sydney Kingsford Smith
Wed 18/3
12:10-19:40
1 stop22h 30m
$1,923
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Mon 23/2
18:07-09:05
1 stop22h 58m
Sydney Kingsford Smith
Sun 8/3
10:20-15:41
1 stop21h 21m
$1,923
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Sun 1/3
13:50-09:15
1 stop27h 25m
Sydney Kingsford Smith
Sun 15/3
10:20-16:41
1 stop21h 21m
$1,923
Flights are sorted by cheapest return flights first.
Deals found on 30/10
Showing 1-10 of 23 results
1
2
3
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 return 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.
Cheapflights Insights
Everything you need to know about your flight from Boston to Sydney
Prices
More
How far ahead should I book a flight from Boston to Sydney?
Use this chart to determine the optimal time to book a return flight from Boston to Sydney. Price data was last updated on 24 October 2025.
The best time to book flights from Boston to Sydney is 38 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Boston to Sydney?
Currently, September is the cheapest month in which you can book a flight from Boston to Sydney (average of $385). Flying from Boston to Sydney in December is currently the most expensive (average of $1,815). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from BOS to SYD?
Find hourly flight availability from Boston to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 31 October 2025.
One of the essential ways to save on airfare from Boston to Sydney is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 31% on airfare.
What’s the top stopover airport for flights from Boston to Sydney?
Share of one-stop return flights from Boston to Sydney chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Los Angeles (LAX) – chosen by Cheapflights users on 50% of one-stop itineraries from Boston to Sydney on Cheapflights.
What’s the fastest stopover option from Boston to Sydney?
Shortest average travel time for one-stop one-way flights from Boston to Sydney, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via San Francisco (SFO) have the shortest average one-way travel time for one-stop routes: 23h 11m.
What’s the fastest stopover option from Boston to Sydney?
Shortest average travel time for one-stop one-way flights from Boston to Sydney, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via San Francisco (SFO) have the shortest average one-way travel time for one-stop routes: 23h 11m.
Which airport typically offers the quickest stopover for flights from Boston to Sydney?
Average stopover duration for one-stop one-way flights from Boston to Sydney, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via San Francisco (SFO) offer the fastest connection on this route, with an average stopover time of 1h 31m.
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 31 October 2025.
Check out reviews from past customers who have flown with Qantas Airways, United Airlines, andAir Canada from Boston to Sydney to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
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?
For as low as $1,875, United Airlines can have you in Sydney from Boston in 27h 25m. Airlines will cover a distance of 16240 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Boston to Sydney round-trip?
Flying on Air Canada is currently your cheapest option to Sydney, with prices starting at $1,161. Additional round-trip tickets that might be worth considering are offered by United Airlines and Qantas Airways, with the lowest prices starting at $1,241 and $1,495, respectively. Air Canada is 46% cheaper than the average price of flights available within the next 90 days to this destination.
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.
What is the cheapest month to book a flight from Boston to Sydney?
Currently, September is the cheapest month in which you can book a flight from Boston to Sydney (average of $385). Flying from Boston to Sydney in December is currently the most expensive (average of $1,815). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Explore flights to Sydney departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 31 October 2025.
Discover the top 3 airlines 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 647,157 searches. Data last updated 31 October 2025.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Boston to Sydney?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Boston to Sydney. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
Why should you use Cheapflights to find cheap flight tickets from Boston to Sydney?
Cheapflights helps you find that perfect flight to Sydney from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Boston to Sydney with no change fees?
Certainly. Search results for flights to Sydney from Boston shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from Boston to Sydney become cheaper?
Of course! You can now track prices for flights from Boston to Sydney and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.
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.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.