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Cheap flights from Boston to Sydney, NS from C$ 405

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 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — YQY
28 May — 4 Jun1
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
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 28 April 2026.

Mon 19/1010:40 a.m.
BOS
-
YQY
1 stop4h 58m
Air Canada
Fri 23/105:20 p.m.
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 25/4C$ 864
Tue 25/810:40 a.m.
BOS
-
YQY
1 stop4h 59m
Air Canada
Wed 26/85:20 p.m.
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 26/4C$ 905
Tue 23/65:00 p.m.
BOS
-
YQY
1 stop6h 07m
Air Canada
Sat 27/65:20 p.m.
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 25/4C$ 912
Mon 20/77:40 p.m.
BOS
-
YQY
2 stops19h 59m
Air Canada
Wed 29/75:20 p.m.
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 26/4C$ 938
Thu 11/610:45 a.m.
BOS
-
YQY
1 stop12h 24m
Air Canada
Thu 18/65:20 p.m.
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 27/4C$ 946
Tue 9/65:10 a.m.
BOS
-
YQY
2 stops10h 04m
Air Canada
Tue 16/65:20 p.m.
YQY
-
BOS
2 stops17h 29m
Air Canada
Deal found 25/4C$ 961
Sun 19/710:40 a.m.
BOS
-
YQY
1 stop4h 59m
Air Canada
Sat 25/75:20 p.m.
YQY
-
BOS
1 stop5h 07m
Air Canada
Deal found 26/4C$ 981

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 28 April 2026.

Round-trip from

C$ 864

One-way from

C$ 405

Popular in

October

Cheapest in

May

Average price

C$ 1,112
Air Canada
  • Air Canada
  • 19/10-23/10
  • 2 total stops
  • 10h 05m total
  • Boston to Sydney
Search Deals
Air Canada
  • Air Canada
  • 10/10
  • 1 total stop
  • 6h 45m total
  • Boston to Sydney
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 64 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 629,999 searches. Data last updated 28 April 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

Price

Cheapest round-trip

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Thu 15/10

6:00 a.m.-4:38 p.m.

2 stops9h 38m

Sydney

Mon 19/10

5:20 p.m.-9:27 p.m.

1 stop5h 07m

C$ 875

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Mon 19/10

6:00 a.m.-4:38 p.m.

2 stops9h 38m

Sydney

Fri 23/10

5:20 p.m.-9:27 p.m.

1 stop5h 07m

C$ 875
Quickest round-trip

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Tue 25/8

10:40 a.m.-4:39 p.m.

1 stop4h 59m

Sydney

Wed 26/8

5:20 p.m.-9:27 p.m.

1 stop5h 07m

C$ 905

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Tue 9/6

5:10 a.m.-4:14 p.m.

2 stops10h 04m

Sydney

Tue 16/6

5:20 p.m.-9:27 p.m.

1 stop5h 07m

C$ 916

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 24/7

10:40 a.m.-4:39 p.m.

1 stop4h 59m

Sydney

Sun 26/7

5:20 p.m.-8:44 a.m.

2 stops16h 24m

C$ 938

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 2/8

10:40 a.m.-4:39 p.m.

1 stop4h 59m

Sydney

Sun 9/8

5:00 a.m.-9:53 a.m.

1 stop5h 53m

C$ 988

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 17/5

5:10 a.m.-4:14 p.m.

2 stops10h 04m

Sydney

Wed 20/5

5:20 p.m.-9:27 p.m.

1 stop5h 07m

C$ 992
Cheapest one-way

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sat 10/10

5:00 p.m.-12:45 a.m.

1 stop6h 45m

C$ 405
Quickest one-way

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Tue 18/8

10:40 a.m.-4:39 p.m.

1 stop4h 59m

C$ 418

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Mon 10/8

10:40 a.m.-4:39 p.m.

1 stop4h 59m

C$ 418

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/4

Showing 1-10 of 14 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
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

How much does it cost to fly round-trip from Boston to Sydney, Nova Scotia?

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, Nova Scotia?

    A quick flight from Boston to Sydney, Nova Scotia can take about 9h 38m. Air Canada provides one of the quickest options available for as low as C$ 875. There are 967 km between Boston and Sydney, Nova Scotia.

  • 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.

See more FAQs

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How does Cheapflights help users find flights from Boston to Sydney?

When you search for this flight from Boston to Sydney, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Boston to Sydney.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Boston to Sydney flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Boston to Sydney become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Sydney from Boston today and book when prices fit your budget.

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