BOS - YQY

C$ 493 Find Cheap Flights from Boston to Sydney – Compare and Save

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Everything you should know

Cheapest round-trip
C$ 966
Typical prices: C$ 1,072-C$ 1,136
Air Canada
Tue 23/10Fri 26/10
BOS - YQY • 1 stop
Cheapest one-way flights
C$ 493
Typical prices: C$ 471-C$ 509
Air Canada
Mon 15/10
BOS - YQY • 1 stop
When to travel
December
Cheapest • 4% price drop
May
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Montreal Pierre Elliott Trudeau Intl (YUL)
Cheapest • Avg C$ 1,178 (round-trip)
Toronto Pearson Intl (YYZ)
Shortest trip • 5h 37m (one-way)
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Flight Deals

Cheap Flights from Boston to Sydney (BOS-YQY)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Sydney

Fri, 23 Oct - Mon, 26 Oct
Air Canada Logo
4:55 p.m. - 12:45 a.m.BOS  Boston Logan Intl-YQY Sydney
6h 50m1 stop Toronto Pearson Intl
Air Canada Logo
6:10 a.m. - 10:03 a.m.YQY  Sydney-BOS Boston Logan Intl
4h 53m1 stop Montreal Pierre Elliott Trudeau Intl
C$ 966Air Canada
Fri, 23 Oct - Mon, 26 Oct
Air Canada Logo
6:00 a.m. - 4:38 p.m.BOS  Boston Logan Intl-YQY Sydney
9h 38m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
6:10 a.m. - 10:03 a.m.YQY  Sydney-BOS Boston Logan Intl
4h 53m1 stop Montreal Pierre Elliott Trudeau Intl
C$ 972Air Canada
Fri, 23 Oct - Mon, 26 Oct
Air Canada Logo
6:00 a.m. - 4:38 p.m.BOS  Boston Logan Intl-YQY Sydney
9h 38m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
6:10 a.m. - 5:58 p.m.YQY  Sydney-BOS Boston Logan Intl
12h 48m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl
C$ 984Air Canada
Tue, 13 Oct - Tue, 20 Oct
Air Canada Logo
4:55 p.m. - 12:45 a.m.BOS  Boston Logan Intl-YQY Sydney
6h 50m1 stop Toronto Pearson Intl
Air Canada Logo
5:05 a.m. - 11:50 a.m.YQY  Sydney-BOS Boston Logan Intl
7h 45m1 stop Toronto Pearson Intl
C$ 1,084Air Canada
Thu, 5 Nov - Fri, 13 Nov
Multiple Airlines Logo
3:10 p.m. - 12:26 a.m.BOS  Boston Logan Intl-YQY Sydney
8h 16m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
12:10 p.m. - 5:58 p.m.YQY  Sydney-BOS Boston Logan Intl
6h 48m1 stop Toronto Pearson Intl
C$ 1,088Multiple Airlines
Tue, 13 Oct - Tue, 20 Oct
Air Canada Logo
4:55 p.m. - 12:45 a.m.BOS  Boston Logan Intl-YQY Sydney
6h 50m1 stop Toronto Pearson Intl
Air Canada Logo
5:05 a.m. - 2:41 p.m.YQY  Sydney-BOS Boston Logan Intl
10h 36m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl
C$ 1,088Air Canada
Mon, 12 Oct - Wed, 14 Oct
Air Canada Logo
6:00 a.m. - 4:38 p.m.BOS  Boston Logan Intl-YQY Sydney
9h 38m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
5:05 a.m. - 11:50 a.m.YQY  Sydney-BOS Boston Logan Intl
7h 45m1 stop Toronto Pearson Intl
C$ 1,088Air Canada
Mon, 12 Oct - Wed, 14 Oct
Multiple Airlines Logo
10:40 a.m. - 4:38 p.m.BOS  Boston Logan Intl-YQY Sydney
4h 58m1 stop Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
5:05 a.m. - 9:55 a.m.YQY  Sydney-BOS Boston Logan Intl
5h 50m1 stop Toronto Pearson Intl
C$ 1,089Multiple Airlines
Wed, 28 Oct - Wed, 4 Nov
Air Canada Logo
6:35 p.m. - 12:26 a.m.BOS  Boston Logan Intl-YQY Sydney
4h 51m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
12:10 p.m. - 5:58 p.m.YQY  Sydney-BOS Boston Logan Intl
6h 48m1 stop Toronto Pearson Intl
C$ 1,089Air Canada
Thu, 5 Nov - Fri, 13 Nov
Multiple Airlines Logo
6:35 p.m. - 12:26 a.m.BOS  Boston Logan Intl-YQY Sydney
4h 51m1 stop Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
12:10 p.m. - 5:58 p.m.YQY  Sydney-BOS Boston Logan Intl
6h 48m1 stop Toronto Pearson Intl
C$ 1,089Multiple Airlines
Booking Insights

Price, demand, and travel trends for Boston to Sydney flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Boston to Sydney with more confidence.

How much is a round-trip flight from Boston to Sydney?

Round-trip flights from Boston to Sydney start at C$ 966. Prices are below average for this route right now, with typical round-trip fares ranging from C$ 1,072 to C$ 1,136. The lowest price found in the past 5 days was C$ 966 on Air Canada.

What's the cheapest day of the week to fly from Boston to Sydney?

Friday is the cheapest day of the week to fly from Boston to Sydney and is 8% cheaper than the average day. Monday is the most expensive day with flight prices 62% higher than average. Based on deals found by KAYAK users in the last 12 months.

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Key details for Boston to Sydney flights

Low season

October

Cheapest flight

C$ 493
Best time to beat the crowds but there is an average 35% increase in price.
Most popular time to fly and prices are also 4% lower on average.
Flights from Boston to Sydney

When to book flights from Boston to Sydney

Are your dates flexible? Find out the best times to travel from Boston to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Boston to Sydney flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which airports can I use when flying from Boston to Sydney?

    Flights from Boston to Sydney usually depart from Boston Logan Intl (BOS) and arrive at Sydney (YQY).

  • Which airports do connecting flights from Boston to Sydney pass through?

    Connecting flights from Boston to Sydney most commonly pass through:

    • Montreal Pierre Elliott Trudeau Intl (YUL) – 91% of one-stop connections
    • Toronto Pearson Intl (YYZ) – 9% of one-stop connections
    Together, these airports account for 100% of one-stop bookings on this route.

  • Can I save money by using flexible dates for flights from Boston to Sydney?

    Yes. Being flexible with your travel dates can save you up to 44% on the Boston to Sydney route. Friday is the cheapest departure day at C$ 1,028 round-trip on average, while Monday is the most expensive at C$ 1,811, a difference of C$ 783. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How long does a flight from Boston to Sydney take?

    There are currently no direct flights available from Boston to Sydney. Flights with 1 layover take between 5h 37m and 5h 55m in total, depending on the connection.

  • Do I need a passport to fly from Boston to Sydney?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • Have flight prices from Boston to Sydney changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route varied from about C$ 966 to C$ 1,345. That means the highest observed fare was about 39% higher than the lowest one.

  • How are flight prices from Boston to Sydney looking right now?

    One-way fares from Boston to Sydney are currently higher than usual. Average one-way flight prices are about C$ 656, which is 39% above the typical average for this route.

  • How much time can I save by choosing a different layover airport when travelling from Boston to Sydney?

    Flying via Toronto Pearson Intl (YYZ) gives the shortest average 1-stop total travel time at 5h 37m, compared with 5h 55m via Montreal Pierre Elliott Trudeau Intl (YUL).

  • What is the time difference between Boston and Sydney?

    Sydney is 1 hour ahead of Boston (Atlantic Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • How much should I expect to pay for a Boston to Sydney flight?

    Round-trip flights from Boston to Sydney range from C$ 1,072 to C$ 1,136, with an average of C$ 1,112 over the past 12 months. Anything below C$ 1,072 counts as a good deal.

Your guide to booking Boston to Sydney flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Friday departure instead of Monday. On this route, Friday flights average C$ 1,028 – about C$ 783 less than Monday (43% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Boston to Sydney trip for December. Fares historically average C$ 1,067 round-trip in that month – typically C$ 744 less than the most expensive month, which is January (based on the last 12 months).

More options for your flight from Boston to Sydney

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