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Cheap flights from Boston to Sydney, NS from C$ 403

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 21/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — YQY
25 Aug — 1 Sep1
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 26 July 2026.

Mon 7/97:00 a.m.
BOS
-
YQY
2 stops35h 25m
Multiple Airlines
Mon 14/95:20 p.m.
YQY
-
BOS
1 stop5h 06m
Multiple Airlines
Deal found 25/7C$ 862
Mon 7/910:40 a.m.
BOS
-
YQY
1 stop4h 34m
Air Canada
Mon 14/95:20 p.m.
YQY
-
BOS
1 stop5h 06m
Air Canada
Deal found 25/7C$ 993
Sun 16/810:40 a.m.
BOS
-
YQY
1 stop4h 40m
Multiple Airlines
Fri 21/85:10 p.m.
YQY
-
BOS
1 stop5h 17m
Multiple Airlines
Deal found 25/7C$ 1,089
Fri 21/810:40 a.m.
BOS
-
YQY
1 stop4h 40m
Air Canada
Sun 23/85:05 a.m.
YQY
-
BOS
2 stops10h 36m
Air Canada
Deal found 24/7C$ 1,099
Sun 16/810:40 a.m.
BOS
-
YQY
1 stop4h 40m
Air Canada
Fri 21/85:05 a.m.
YQY
-
BOS
2 stops10h 31m
Air Canada
Deal found 25/7C$ 1,100
Thu 20/810:40 a.m.
BOS
-
YQY
2 stops12h 32m
Air Canada
Sun 23/85:05 a.m.
YQY
-
BOS
2 stops10h 36m
Air Canada
Deal found 24/7C$ 1,110
Sun 16/83:35 p.m.
BOS
-
YQY
2 stops7h 47m
Air Canada
Thu 20/85:05 a.m.
YQY
-
BOS
2 stops10h 36m
Air Canada
Deal found 25/7C$ 1,112
Thu 27/810:40 a.m.
BOS
-
YQY
1 stop4h 40m
Air Canada
Mon 31/85:10 p.m.
YQY
-
BOS
1 stop5h 17m
Air Canada
Deal found 22/7C$ 1,134
Thu 24/910:40 a.m.
BOS
-
YQY
1 stop4h 32m
Air Canada
Sun 27/95:20 p.m.
YQY
-
BOS
1 stop5h 06m
Air Canada
Deal found 23/7C$ 1,136
Tue 18/810:40 a.m.
BOS
-
YQY
1 stop4h 40m
Air Canada
Tue 25/85:10 p.m.
YQY
-
BOS
1 stop5h 17m
Air Canada
Deal found 21/7C$ 1,141

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 26 July 2026.

Round-trip from

C$ 1,099

One-way from

C$ 403
Air Canada
  • Air Canada
  • 21/8-23/8
  • 3 total stops
  • 15h 16m total
  • Boston to Sydney
Search Deals
WestJet
  • WestJet
  • 21/8
  • 1 total stop
  • 23h 55m total
  • Boston to Sydney
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 26 July 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

Sun 16/8

10:40 a.m.-4:20 p.m.

1 stop4h 40m

Sydney

Thu 20/8

5:10 p.m.-9:27 p.m.

1 stop5h 17m

C$ 1,089

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 16/8

10:40 a.m.-4:20 p.m.

1 stop4h 40m

Sydney

Fri 21/8

5:10 p.m.-9:27 p.m.

1 stop5h 17m

C$ 1,089

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 16/8

10:40 a.m.-4:20 p.m.

1 stop4h 40m

Sydney

Thu 20/8

5:05 a.m.-2:41 p.m.

2 stops10h 36m

C$ 1,100

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Sun 16/8

10:40 a.m.-4:20 p.m.

1 stop4h 40m

Sydney

Fri 21/8

5:05 a.m.-2:36 p.m.

2 stops10h 31m

C$ 1,100

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Fri 21/8

3:40 p.m.-12:12 a.m.

2 stops7h 32m

Sydney

Sun 23/8

5:05 a.m.-2:41 p.m.

2 stops10h 36m

C$ 1,110

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Thu 20/8

10:40 a.m.-12:12 a.m.

2 stops12h 32m

Sydney

Sun 23/8

5:05 a.m.-2:41 p.m.

2 stops10h 36m

C$ 1,110

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Wed 19/8

10:40 a.m.-4:20 p.m.

1 stop4h 40m

Sydney

Mon 24/8

5:10 p.m.-9:27 p.m.

1 stop5h 17m

C$ 1,141
Quickest round-trip

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Tue 1/9

10:40 a.m.-4:14 p.m.

1 stop4h 34m

Sydney

Fri 4/9

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

1 stop5h 07m

C$ 1,144

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Wed 19/8

6:00 a.m.-4:20 p.m.

2 stops9h 20m

Sydney

Wed 26/8

5:10 p.m.-9:27 p.m.

1 stop5h 17m

C$ 1,153

BostonSydney

BOS - YQY

BOSYQY

Boston Logan Intl

Tue 1/9

10:40 a.m.-4:14 p.m.

1 stop4h 34m

Sydney

Sat 5/9

5:05 a.m.-2:41 p.m.

2 stops10h 36m

C$ 1,157

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/7

Showing 1-10 of 18 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.

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 4h 40m. Air Canada provides one of the quickest options available for as low as C$ 1,100. 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

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Inverness

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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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