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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SYD
15 Jan — 22 Jan1
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 September or March, booked 73 days in advance, depart on a Tuesday or Saturday and return on a Sunday
Cheap 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 16 December 2025.
Tue 30/1217:59BOS - SYD
1 stop23h 01mQantas Airways
Sun 15/207:05SYD - BOS
2 stops31h 03mQantas Airways
Deal found 13/12$1,699
Tue 30/1215:40BOS - SYD
1 stop46h 55mEtihad Airways
Sun 15/216:35SYD - BOS
1 stop37h 35mEtihad Airways
Deal found 13/12$1,950
Tue 30/1205:30BOS - SYD
2 stops33h 25mAir Canada
Sun 15/211:20SYD - BOS
3 stops38h 12mAir Canada
Deal found 13/12$2,219
Wed 31/1211:26BOS - SYD
2 stops53h 44mQantas Airways
Mon 18/510:05SYD - BOS
2 stops25h 05mQantas Airways
Deal found 14/12$2,230
Thu 25/1218:55BOS - SYD
2 stops68h 00mAir Canada
Fri 16/111:20SYD - BOS
2 stops48h 22mAir Canada
Deal found 14/12$2,343
Sat 20/1205:20BOS - SYD
2 stops35h 45mUnited Airlines
Wed 31/1208:30SYD - BOS
2 stops30h 18mUnited Airlines
Deal found 15/12$2,382
Wed 17/1212:02BOS - SYD
2 stops26h 58mUnited Airlines
Wed 31/1209:00SYD - BOS
2 stops29h 48mUnited Airlines
Deal found 15/12$2,389
Fri 26/1206:15BOS - SYD
2 stops59h 20mAir Canada
Tue 30/1211:20SYD - BOS
3 stops46h 30mAir Canada
Deal found 13/12$2,423
Tue 30/1206:15BOS - SYD
3 stops35h 40mMultiple Airlines
Sun 15/208:20SYD - BOS
3 stops25h 42mMultiple Airlines
Deal found 13/12$2,480
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 16 December 2025.
Sun 8/215:35BOS - SYD
2 stops26h 00mAir Canada
Thu 12/211:20SYD - BOS
2 stops43h 32mAir Canada
Deal found 15/12$1,738
Sun 1/208:00BOS - SYD
1 stop33h 00mAmerican Airlines
Sun 15/211:20SYD - BOS
1 stop26h 48mAmerican Airlines
Deal found 16/12$1,788
Wed 15/405:45BOS - SYD
2 stops35h 15mUnited Airlines
Tue 28/410:20SYD - BOS
1 stop22h 35mUnited Airlines
Deal found 14/12$1,825
Mon 16/212:45BOS - SYD
1 stop27h 45mDelta
Mon 23/214:15SYD - BOS
1 stop23h 08mDelta
Deal found 14/12$1,825
Wed 29/405:30BOS - SYD
2 stops35h 50mAir Canada
Wed 13/509:20SYD - BOS
2 stops38h 25mAir Canada
Deal found 15/12$1,765
Sun 8/305:45BOS - SYD
2 stops36h 20mUnited Airlines
Tue 31/311:20SYD - BOS
2 stops27h 44mUnited Airlines
Deal found 14/12$1,825
Sat 18/418:25BOS - SYD
2 stops46h 10mDelta
Wed 29/409:15SYD - BOS
1 stop24h 23mDelta
Deal found 14/12$1,833
Tue 10/317:50BOS - SYD
1 stop24h 25mUnited Airlines
Mon 11/510:20SYD - BOS
2 stops27h 34mUnited Airlines
Deal found 14/12$1,825
Mon 16/211:15BOS - SYD
2 stops29h 15mDelta
Tue 24/210:40SYD - BOS
1 stop21h 37mDelta
Deal found 14/12$1,833
Sat 7/307:30BOS - SYD
1 stop33h 00mDelta
Wed 13/509:15SYD - BOS
1 stop24h 23mDelta
Deal found 14/12$1,840
Sun 8/307:30BOS - SYD
1 stop31h 35mDelta
Sat 28/309:40SYD - BOS
1 stop26h 42mDelta
Deal found 15/12$1,840
Last-minute flights from Boston to Sydney
Discover last-minute flight deals from Boston to Sydney. Data last updated 16 December 2025 and is based on user searches.
Sun 21/1215:59BOS - SYD
2 stops27h 56mQantas Airways
Sun 28/1211:20SYD - BOS
1 stop21h 49mQantas Airways
Deal found 14/12$2,742
Sun 21/1215:59BOS - SYD
2 stops30h 51mQantas Airways
Mon 12/117:45SYD - BOS
1 stop28h 40mQantas Airways
Deal found 15/12$2,752
Sun 21/1214:32BOS - SYD
2 stops32h 18mQantas Airways
Thu 1/111:20SYD - BOS
1 stop35h 08mQantas Airways
Deal found 14/12$2,763
Tue 23/1206:15BOS - SYD
2 stops59h 20mAir Canada
Fri 16/111:20SYD - BOS
2 stops43h 32mAir Canada
Deal found 14/12$2,568
Wed 24/1208:00BOS - SYD
1 stop33h 00mQantas Airways
Thu 15/110:30SYD - BOS
2 stops27h 25mQantas Airways
Deal found 14/12$2,644
Wed 24/1207:25BOS - SYD
1 stop31h 35mUnited Airlines
Tue 13/114:00SYD - BOS
1 stop21h 51mUnited Airlines
Deal found 14/12$2,803
Wed 24/1210:25BOS - SYD
2 stops28h 35mUnited Airlines
Sun 11/112:10SYD - BOS
1 stop23h 41mUnited Airlines
Deal found 14/12$2,811
Thu 25/1218:55BOS - SYD
2 stops68h 00mAir Canada
Fri 16/111:20SYD - BOS
2 stops48h 22mAir Canada
Deal found 14/12$2,343
Thu 25/1218:55BOS - SYD
2 stops68h 00mAir Canada
Tue 30/1211:20SYD - BOS
3 stops46h 30mAir Canada
Deal found 13/12$2,648
Fri 26/1206:15BOS - SYD
2 stops59h 20mAir Canada
Tue 30/1211:20SYD - BOS
3 stops46h 30mAir Canada
Deal found 13/12$2,423
Fri 26/1206:15BOS - SYD
2 stops59h 20mAir Canada
Wed 31/1211:20SYD - BOS
2 stops38h 12mAir Canada
Deal found 13/12$2,719
Fri 26/1215:40BOS - SYD
1 stop46h 55mEtihad Airways
Wed 31/1216:35SYD - BOS
1 stop37h 35mEtihad Airways
Deal found 13/12$2,823
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 16 December 2025.
Sun 8/315:35BOS - SYD
2 stops26h 00mAir Canada
Deal found 14/12$782
Sat 2/505:50BOS - SYD
2 stops35h 30mAir Canada
Deal found 16/12$846
Sat 7/315:35BOS - SYD
2 stops49h 00mAir Canada
Deal found 14/12$867
Fri 6/318:40BOS - SYD
3 stops69h 55mAir Canada
Deal found 14/12$871
Tue 10/305:30BOS - SYD
3 stops36h 05mAir Canada
Deal found 14/12$876
Sun 1/209:45BOS - SYD
1 stop29h 10mQantas Airways
Deal found 14/12$936
Thu 5/305:30BOS - SYD
2 stops36h 05mAir Canada
Deal found 14/12$942
Tue 27/111:00BOS - SYD
1 stop28h 25mQantas Airways
Deal found 14/12$948
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 (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 16 December 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 16 December 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
Sun 8/2
15:35-09:35
2 stops26h 00m
Sydney Kingsford Smith
Thu 12/2
11:20-14:52
2 stops43h 32m
$1,738
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Wed 29/4
05:30-07:20
2 stops35h 50m
Sydney Kingsford Smith
Wed 13/5
09:20-09:45
2 stops38h 25m
$1,765
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Sun 1/2
08:00-09:00
1 stop33h 00m
Sydney Kingsford Smith
Sun 15/2
11:20-22:08
1 stop26h 48m
$1,788
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Wed 15/4
05:45-07:00
2 stops35h 15m
Sydney Kingsford Smith
Tue 28/4
10:20-18:55
1 stop22h 35m
$1,825
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Mon 16/2
12:45-08:30
1 stop27h 45m
Sydney Kingsford Smith
Mon 23/2
14:15-21:23
1 stop23h 08m
$1,825
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Sun 8/3
05:45-09:05
2 stops36h 20m
Sydney Kingsford Smith
Tue 31/3
11:20-00:04
2 stops27h 44m
$1,825
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Tue 10/3
17:50-09:15
1 stop24h 25m
Sydney Kingsford Smith
Mon 11/5
10:20-23:54
2 stops27h 34m
$1,825
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Sat 18/4
18:25-06:35
2 stops46h 10m
Sydney Kingsford Smith
Wed 29/4
09:15-19:38
1 stop24h 23m
$1,833
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Mon 16/2
11:15-08:30
2 stops29h 15m
Sydney Kingsford Smith
Tue 24/2
10:40-16:17
1 stop21h 37m
$1,833
BostonSydney
BOS - SYD
BOSSYD
Boston Logan Intl
Sat 7/3
07:30-08:30
1 stop33h 00m
Sydney Kingsford Smith
Wed 13/5
09:15-19:38
1 stop24h 23m
$1,840
Flights are sorted by cheapest return flights first.
Deals found on 14/12
Showing 1-10 of 19 results
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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 12 December 2025.
The best time to book flights from Boston to Sydney is 73 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 $378). Flying from Boston to Sydney in January is currently the most expensive (average of $1,720). 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 16 December 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 46% of one-stop itineraries from Boston to Sydney on Cheapflights.
What’s the cheapest stopover airport for flights from Boston to Sydney?
Average return fare for one-stop flights from Boston to Sydney, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
San Francisco (SFO) is the most affordable one-stop option, with an average return flight price of $2,261.
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 Los Angeles (LAX) have the shortest average one-way travel time for one-stop routes: 23h 46m.
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 Dallas (DFW) offer the fastest connection on this route, with an average stopover time of 1h 54m.
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 16 December 2025.
Check out reviews from past customers who have flown with Qantas Airways, United Airlines, andAmerican Airlines 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.
There was no WiFi or tv traveling from LAX to Sydney. Way too long of a flight to have nothing.
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 $1,738, Air Canada can have you in Sydney from Boston in 26h. 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 United Airlines is currently your cheapest option to Sydney, with prices starting at $1,226. Additional round-trip tickets that might be worth considering are offered by Qantas Airways and American Airlines, with the lowest prices starting at $1,477 and $1,491, respectively. United Airlines is 42% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Boston to Sydney one-way?
For one-way options, check prices for Virgin Australia. According to our data, you can fly for as low as $821. Users have also found prices from $1,021 and $1,190 on Qantas Airways and United Airlines, respectively.
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 holiday 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.
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 $378). Flying from Boston to Sydney in January is currently the most expensive (average of $1,720). 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 16 December 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 16 December 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.
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