$597+ Cheap flights from Boston (BOS) to Sydney (SYD)
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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SYD
Sep 9 — Sep 161
Round-trip
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
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 August 10, 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 August 10, 2026.
This Travelocity deal was found by Cheapflights users on 8/7. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:55 pm -
2 stops46h 25m
Sat 10/1010:20 am -
2 stops26h 06m
Deal found 8/7![Air Canada logo]()
$1,183
This Air Canada deal was found by Cheapflights users on 8/5. 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.
Fri 10/2310:40 am -
2 stops30h 40m
Mon 11/211:20 am -
3 stops38h 38m
Deal found 8/5![Air Canada logo]()
$1,186
This FlightHub deal was found by Cheapflights users on 8/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:50 am -
2 stops35h 30m
Sun 9/279:20 am -
2 stops26h 06m
Deal found 8/5![Air Canada logo]()
$1,188
This Ticket deal was found by Cheapflights users on 8/8. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:59 pm -
1 stop24h 06m
Wed 8/269:10 am -
1 stop28h 34m
Deal found 8/8![Qantas Airways logo]()
$1,190
This FlightHub deal was found by Cheapflights users on 8/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/217:40 pm -
2 stops45h 55m
Sat 11/2811:20 am -
2 stops38h 38m
Deal found 8/5![Air Canada logo]()
$1,192
This FlightHub deal was found by Cheapflights users on 8/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:55 pm -
2 stops46h 25m
Sat 10/3110:20 am -
2 stops44h 33m
Deal found 8/7![Air Canada logo]()
$1,193
This Air Canada deal was found by Cheapflights users on 8/5. 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.
Wed 8/1910:40 am -
2 stops30h 40m
Sat 8/229:20 am -
2 stops23h 59m
Deal found 8/5![Multiple Airlines logo]()
$1,195
This Air Canada deal was found by Cheapflights users on 8/5. 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.
Sat 10/2412:36 pm -
2 stops28h 59m
Tue 11/311:20 am -
3 stops38h 38m
Deal found 8/5![Multiple Airlines logo]()
$1,197
This Ovago deal was found by Cheapflights users on 8/9. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:30 pm -
1 stop28h 50m
Tue 11/1011:20 am -
2 stops26h 08m
Deal found 8/9![Air New Zealand logo]()
$1,198
This Ovago deal was found by Cheapflights users on 8/5. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:55 pm -
1 stop46h 40m
Tue 11/311:20 am -
1 stop27h 17m
Deal found 8/5![Singapore Airlines logo]()
$1,202
This Air Canada deal was found by Cheapflights users on 8/7. 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.
Tue 10/2010:40 am -
3 stops30h 40m
Sat 10/2410:20 am -
2 stops25h 37m
Deal found 8/7![Multiple Airlines logo]()
$1,203
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 August 10, 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 August 10, 2026.
This United Airlines deal was found by Cheapflights users on 8/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:45 pm -
1 stop26h 15m
Wed 10/2810:20 am -
1 stop22h 18m
Deal found 8/6![United Airlines logo]()
$1,308
This Delta deal was found by Cheapflights users on 8/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:15 pm -
1 stop23h 15m
Fri 2/2610:40 am -
1 stop24h 56m
Deal found 8/8![Delta logo]()
$1,352
This Air New Zealand deal was found by Cheapflights users on 8/8. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/17:10 am -
3 stops33h 25m
Wed 3/32:05 pm -
3 stops36h 48m
Deal found 8/8![Multiple Airlines logo]()
$1,396
This Qatar Airways deal was found by Cheapflights users on 8/8. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:00 pm -
2 stops49h 50m
Sun 2/283:50 pm -
1 stop38h 40m
Deal found 8/8![Qatar Airways logo]()
$1,501
This United Airlines deal was found by Cheapflights users on 8/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:00 am -
1 stop33h 00m
Sun 10/1111:20 am -
2 stops27h 39m
Deal found 8/7![United Airlines logo]()
$1,358
This Qatar Airways deal was found by Cheapflights users on 8/7. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:40 pm -
1 stop42h 10m
Sun 11/83:50 pm -
1 stop38h 05m
Deal found 8/7![Qatar Airways logo]()
$1,527
This United Airlines deal was found by Cheapflights users on 8/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2311:50 am -
1 stop29h 10m
Sun 8/3010:20 am -
1 stop26h 39m
Deal found 8/8![United Airlines logo]()
$1,418
This Delta deal was found by Cheapflights users on 8/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/1510:55 am -
1 stop29h 35m
Wed 1/2710:40 am -
1 stop26h 01m
Deal found 8/8![Delta logo]()
$1,633
This United Airlines deal was found by Cheapflights users on 8/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:13 pm -
1 stop22h 42m
Thu 9/39:30 am -
1 stop21h 50m
Deal found 8/5![United Airlines logo]()
$1,469
This United Airlines deal was found by Cheapflights users on 8/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:25 am -
2 stops33h 35m
Mon 9/710:20 am -
2 stops23h 08m
Deal found 8/9![United Airlines logo]()
$1,526
This United Airlines deal was found by Cheapflights users on 8/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:25 am -
2 stops33h 30m
Sat 9/59:30 am -
1 stop22h 16m
Deal found 8/7![United Airlines logo]()
$1,757
This United Airlines deal was found by Cheapflights users on 8/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/41:32 pm -
2 stops27h 48m
Sun 11/89:15 am -
1 stop23h 34m
Deal found 8/7![United Airlines logo]()
$1,818
Last-minute flights from Boston to SydneyDiscover last-minute flight deals from Boston to Sydney. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Sydney. Data last updated August 10, 2026 and is based on user searches.
This Ticket deal was found by Cheapflights users on 8/8. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:59 pm -
1 stop24h 06m
Wed 8/269:10 am -
1 stop28h 34m
Deal found 8/8![Qantas Airways logo]()
$1,190
This American Airlines deal was found by Cheapflights users on 8/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/107:00 am -
1 stop34h 05m
Sun 8/239:10 am -
2 stops23h 53m
Deal found 8/7![American Airlines logo]()
$1,225
This American Airlines deal was found by Cheapflights users on 8/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/107:00 am -
1 stop34h 05m
Wed 8/2612:00 pm -
1 stop24h 06m
Deal found 8/8![American Airlines logo]()
$1,227
This oojo deal was found by Cheapflights users on 8/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:59 pm -
1 stop24h 06m
Sun 8/3012:00 pm -
1 stop21h 43m
Deal found 8/9![Qantas Airways logo]()
$1,204
This Air Canada deal was found by Cheapflights users on 8/5. 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.
Wed 8/1910:40 am -
2 stops30h 40m
Sat 8/229:20 am -
2 stops23h 59m
Deal found 8/5![Multiple Airlines logo]()
$1,195
This Ovago deal was found by Cheapflights users on 8/7. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:00 am -
1 stop35h 20m
Tue 9/159:20 am -
1 stop38h 35m
Deal found 8/7![Singapore Airlines logo]()
$1,203
This FlightHub deal was found by Cheapflights users on 8/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:50 am -
2 stops35h 30m
Sun 9/279:20 am -
2 stops26h 06m
Deal found 8/5![Air Canada logo]()
$1,188
This Travelocity deal was found by Cheapflights users on 8/7. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:55 pm -
2 stops46h 25m
Sat 10/1010:20 am -
2 stops26h 06m
Deal found 8/7![Air Canada logo]()
$1,183
This Air Canada deal was found by Cheapflights users on 8/5. 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.
Fri 9/1810:40 am -
2 stops30h 40m
Sun 10/1110:20 am -
3 stops38h 30m
Deal found 8/5![Air Canada logo]()
$1,186
This Ovago deal was found by Cheapflights users on 8/8. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:00 am -
1 stop35h 20m
Tue 10/610:20 am -
2 stops26h 06m
Deal found 8/8![Multiple Airlines logo]()
$1,198
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 August 10, 2026.
Search for one-way flight options from Boston to Sydney. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1012:35 pm -
3 stops39h 40m
Deal found 8/8![Multiple Airlines logo]()
$597
This oojo deal was found by Cheapflights users on 8/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:30 am -
1 stop30h 35m
Deal found 8/7![Qantas Airways logo]()
$634
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:59 pm -
1 stop24h 06m
Deal found 8/8![Qantas Airways logo]()
$640
This oojo deal was found by Cheapflights users on 8/8. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1610:30 am -
1 stop30h 35m
Deal found 8/8![Qantas Airways logo]()
$643
This American Airlines deal was found by Cheapflights users on 8/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/163:53 pm -
2 stops25h 12m
Deal found 8/5![American Airlines logo]()
$648
This United Airlines deal was found by Cheapflights users on 8/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/313:30 pm -
2 stops25h 25m
Deal found 8/7![United Airlines logo]()
$651
This United Airlines deal was found by Cheapflights users on 8/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:30 pm -
2 stops44h 25m
Deal found 8/8![United Airlines logo]()
$656
This oojo deal was found by Cheapflights users on 8/8. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:00 am -
1 stop34h 05m
Deal found 8/8![Qantas Airways logo]()
$659
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:35 pm -
3 stops39h 40m
Deal found 8/8![Multiple Airlines logo]()
$663
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/69:36 am -
2 stops31h 54m
Deal found 8/7![Multiple Airlines logo]()
$666
This Bravofly deal was found by Cheapflights users on 8/9. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:35 pm -
1 stop24h 30m
Deal found 8/9![Qantas Airways logo]()
$674
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 August 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,183 (Travelocity) |
One-way from | $597 (Kiwi.com) |
Popular in | December |
Cheapest in | September |
Average price | $1,427 |
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 10, 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 - SYD Sydney Kingsford Smith
BOSSYD
Boston Logan Intl
Tue 10/13
2:45 pm-8:00 am
1 stop26h 15m
Sydney Kingsford Smith
Wed 10/28
10:20 am-5:38 pm
1 stop22h 18m
$1,308
BostonSydney
BOS Boston Logan Intl - SYD Sydney Kingsford Smith
BOSSYD
Boston Logan Intl
Tue 11/3
5:15 pm-8:30 am
1 stop23h 15m
Sydney Kingsford Smith
Fri 2/26
10:40 am-7:36 pm
1 stop24h 56m
$1,352
BostonSydney
BOS Boston Logan Intl - SYD Sydney Kingsford Smith
BOSSYD
Boston Logan Intl
Fri 9/18
8:00 am-7:00 am
1 stop33h 00m
Sydney Kingsford Smith
Sun 10/11
11:20 am-11:59 pm
2 stops27h 39m
$1,358
BostonSydney
BOS Boston Logan Intl - SYD Sydney Kingsford Smith
BOSSYD
Boston Logan Intl
Mon 2/1
7:10 am-8:35 am
3 stops33h 25m
Sydney Kingsford Smith
Wed 3/3
2:05 pm-10:53 am
3 stops36h 48m
$1,396
BostonSydney
BOS Boston Logan Intl - SYD Sydney Kingsford Smith
BOSSYD
Boston Logan Intl
Sun 8/23
11:50 am-7:00 am
1 stop29h 10m
Sydney Kingsford Smith
Sun 8/30
10:20 am-10:59 pm
1 stop26h 39m
$1,418
Quickest round-trip
BostonSydney
BOS Boston Logan Intl - SYD Sydney Kingsford Smith
BOSSYD
Boston Logan Intl
Fri 8/21
6:13 pm-6:55 am
1 stop22h 42m
Sydney Kingsford Smith
Thu 9/3
9:30 am-5:20 pm
1 stop21h 50m
$1,469
BostonSydney
BOS Boston Logan Intl - SYD Sydney Kingsford Smith
BOSSYD
Boston Logan Intl
Thu 11/5
1:00 pm-6:50 am
2 stops49h 50m
Sydney Kingsford Smith
Sun 2/28
3:50 pm-2:30 pm
1 stop38h 40m
$1,501
BostonSydney
BOS Boston Logan Intl - SYD Sydney Kingsford Smith
BOSSYD
Boston Logan Intl
Mon 8/24
7:25 am-7:00 am
2 stops33h 35m
Sydney Kingsford Smith
Mon 9/7
10:20 am-7:28 pm
2 stops23h 08m
$1,526
BostonSydney
BOS Boston Logan Intl - SYD Sydney Kingsford Smith
BOSSYD
Boston Logan Intl
Wed 11/4
8:40 pm-6:50 am
1 stop42h 10m
Sydney Kingsford Smith
Sun 11/8
3:50 pm-1:55 pm
1 stop38h 05m
$1,527
BostonSydney
BOS Boston Logan Intl - SYD Sydney Kingsford Smith
BOSSYD
Boston Logan Intl
Fri 1/15
10:55 am-8:30 am
1 stop29h 35m
Sydney Kingsford Smith
Wed 1/27
10:40 am-8:41 pm
1 stop26h 01m
$1,633
Showing 1-10 of 22 resultsSorted 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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Boston-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Sydney flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Boston-Sydney 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 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-SYD
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.
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?
To ensure you get the cheapest price possible for a flight from Boston to Sydney, you should look to book at least 15 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
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 $1,278). Flying from Boston to Sydney in December is currently the most expensive (average of $2,129). 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.
How much does it cost to fly round-trip from Boston to Sydney?
Airfare is below average for this route at the moment.
Boston to Sydney flights typically cost between $1,265 and $1,646 in September.The cheapest round-trip price found within the last 5 days was $1,183 on Air Canada (Sep 14-Oct 10).
What’s the top layover airport for flights from Boston to Sydney?
Share of 1-stop round-trip flights from Boston to Sydney chosen by Cheapflights users in the past 12 months, using the same layover each way.
Los Angeles (LAX) – chosen by Cheapflights users on 50% of 1-stop itineraries from Boston to Sydney on Cheapflights.
What’s the cheapest layover airport for flights from Boston to Sydney?
Average round-trip fare for 1-stop flights from Boston to Sydney, chosen by Cheapflights users in the past 12 months, with the same layover each way.
San Francisco (SFO) is the most affordable 1-stop option, with an average round-trip price of $1,249.
What’s the fastest layover option from Boston to Sydney?
Shortest average travel time for 1-stop one-way flights from Boston to Sydney, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Los Angeles (LAX) have the shortest average one-way travel time for 1-stop routes: 23h 03m.
Which airport typically offers the quickest layover for flights from Boston to Sydney?
Average layover duration for 1-stop one-way flights from Boston to Sydney, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Los Angeles (LAX) offer the fastest connection on this route, with an average layover time of 1h 42m.
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 10, 2026.
See what other customers who have flown with Air New Zealand,Delta, andQantas Airways from Boston to Sydney have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Food
7.4
Comfort
7.9
Crew
8.5
Entertainment
7.4
Boarding
8.2
Reviews
1 / 20
10.0
ExcellentDebra,Mar 2026
HNL - AKL
Overall
8.0
Food
7.4
Comfort
7.9
Crew
8.5
Entertainment
7.4
Boarding
8.2
Reviews
1 / 20
10.0
ExcellentDebra,Mar 2026
HNL - AKL
Overall
8.0
Food
7.4
Comfort
7.9
Crew
8.5
Entertainment
7.4
Boarding
8.2
Reviews
1 / 20
10.0
ExcellentDebra,Mar 2026
HNL - AKL
Overall
8.0
Food
7.4
Comfort
7.9
Crew
8.5
Entertainment
7.4
Boarding
8.2
Reviews
1 / 20
10.0
ExcellentDebra,Mar 2026
HNL - AKL
Overall
8.0
Food
7.4
Comfort
7.9
Crew
8.5
Entertainment
7.4
Boarding
8.2
Reviews
1 / 20
10.0
ExcellentDebra,Mar 2026
HNL - AKL
Overall
8.0
Food
7.4
Comfort
7.9
Crew
8.5
Entertainment
7.4
Boarding
8.2
Reviews
1 / 20
10.0
ExcellentDebra,Mar 2026
HNL - AKL
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.
Traveling to a place near Sydney?
Book flights to Sydney if you plan to visit one of these locationsParramatta
Wollongong
Coogee
Manly
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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Boston
Popular flights
Sydney flight routes
Alternative routes for Boston to Sydney
See prices for flight routes from nearby airports that may be better suited for you.
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 August 10, 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 August 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Sydney
Explore flights to Sydney departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 10, 2026.
Top 8 airlines flying from Boston to Sydney
Discover the top 8 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 2,558,603 searches. Data last updated August 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$318 | Average$1,467 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$703 | Average$772 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$907 | Average$1,363 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,088 | Average$1,442 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,097 | Average$1,460 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$1,145 | Average$1,485 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,147 | Average$1,426 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,233 | Average$1,558 | FlexibilityNo cancel fee | On-time68% |