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Cheap flights from Boston to Sydney from C$ 764

BOS — SYD
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Boston to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Boston to Sydney

Tue 27/104:58 p.m. -
2 stops35h 47m
Thu 12/119:40 p.m. -
2 stops24h 06m
Deal found 26/10C$ 1,824
Sun 8/119:00 a.m. -
1 stop32h 20m
Sat 6/211:50 a.m. -
2 stops28h 09m
Deal found 25/10C$ 1,853
Wed 4/113:28 p.m. -
1 stop23h 32m
Wed 11/1111:50 a.m. -
2 stops23h 49m
Deal found 27/10C$ 1,857
Mon 2/116:01 p.m. -
1 stop23h 19m
Mon 16/1111:50 a.m. -
1 stop20h 59m
Deal found 27/10C$ 1,859
Sun 15/119:03 a.m. -
2 stops42h 42m
Tue 1/129:40 p.m. -
2 stops59h 28m
Deal found 26/10C$ 1,863
Tue 27/104:58 p.m. -
2 stops35h 47m
Sun 15/119:40 p.m. -
2 stops35h 01m
Deal found 26/10C$ 1,869
Mon 26/106:40 p.m. -
2 stops58h 05m
Fri 13/119:40 p.m. -
2 stops24h 06m
Deal found 26/10C$ 1,870
Sun 1/111:32 p.m. -
2 stops27h 48m
Mon 9/1111:50 a.m. -
2 stops28h 09m
Deal found 30/10C$ 1,871
Tue 27/1011:55 a.m. -
2 stops28h 05m
Mon 16/1111:50 a.m. -
1 stop20h 59m
Deal found 26/10C$ 1,877
Wed 28/106:01 p.m. -
1 stop24h 19m
Wed 4/1111:20 a.m. -
3 stops29h 26m
Deal found 28/10C$ 1,878
Sat 31/106:55 p.m. -
1 stop46h 35m
Tue 10/1110:40 a.m. -
1 stop25h 40m
Deal found 26/10C$ 1,889

Find flight deals from Boston to Sydney

Round-trip from

C$ 1,814

One-way from

C$ 764

Popular in

December

Cheapest in

May

Average price

C$ 1,969
Delta
  • Delta
  • 22/1-3/3
  • 3 total stops
  • 90h 40m total
  • Boston to Sydney
Search Deals
28/3-31/12
  • 28/3-31/12
  • 2 total stops
  • 36h 15m total
  • Boston to Sydney
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 318 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 79 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2026
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Cheapflights Fare Finder

 
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 Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sun 28/3

6:30 a.m.-9:45 a.m.

2 stops36h 15m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 764

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Sun 15/11

8:25 a.m.-9:05 a.m.

1 stop32h 40m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 982
Quickest round-trip

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Mon 25/1

1:16 p.m.-8:30 a.m.

2 stops27h 14m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 1,032

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Wed 20/1

1:48 p.m.-9:20 a.m.

1 stop27h 32m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 1,032

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 19/1

10:45 a.m.-6:50 a.m.

2 stops28h 05m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 1,032

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 19/1

9:15 a.m.-6:20 a.m.

1 stop29h 05m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 1,032

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 16/2

8:19 a.m.-9:05 a.m.

1 stop32h 46m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 1,032

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Wed 17/2

5:45 a.m.-6:20 a.m.

3 stops32h 35m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 1,032

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Wed 3/2

12:26 p.m.-9:05 a.m.

3 stops28h 39m

Sydney Kingsford Smith

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 1,032

BostonSydney

BOS Boston Logan Intl - SYD Sydney Kingsford Smith

BOSSYD

Boston Logan Intl

Tue 26/1

4:56 p.m.-7:45 p.m.

2 stops58h 49m

Sydney Kingsford Smith

Thu 4/3

9:40 p.m.-4:46 p.m.

2 stops35h 06m

C$ 1,941

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 17 resultsSorted by cheapest first
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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 round-trip price

Cheapflights Insights

Everything you need to know about your flight from Boston to Sydney

How far ahead should I book a flight from Boston to Sydney?

The best time to book flights from Boston to Sydney is 1 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, May is the cheapest month in which you can book a flight from Boston to Sydney (average of C$ 1,762). Flying from Boston to Sydney in December is currently the most expensive (average of C$ 2,597). 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 C$ 1,866 and C$ 2,172 in February.
The cheapest round-trip price found within the last 5 days was C$ 1,824 on Qatar Airways (21 Feb-7 Mar).

Related info for your journey

  • How long is the flight from Boston to Sydney?

    Departing from Boston to Sydney will take you 26h 55m. Boston and Sydney are separated by a distance of 16240 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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.

  • What is the cheapest month to book a flight from Boston to Sydney?

    Currently, May is the cheapest month in which you can book a flight from Boston to Sydney (average of C$ 1,762). Flying from Boston to Sydney in December is currently the most expensive (average of C$ 2,597). 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.

See more FAQs

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Bondi Beach
Parramatta

Browse thousands of different options on Cheapflights for your next trip

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Why should you use Cheapflights to find cheap flight tickets from Boston to Sydney?

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Can Cheapflights find flights from Boston to Sydney with no change fees?

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Yes! Start tracking prices for Boston to Sydney flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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