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Flights from Boston to Sydney

Flight Info | Boston to Sydney

The distance between Boston and Sydney is approximately 16,251.57 km. Based on Trip.com's data, travel demand peaks in July. The cheapest month to book is August.

Cheapest one-way
$561
American Airlines American Airlines BOS-SYD 30h 35m · 1 stop Tue, Jul 28
View details
Cheapest round-trip
$1,189
United Airlines United Airlines BOS-SYD 29h 10m · 2 stops Thu, Aug 20 - Thu, Aug 27
View details
Recommended airlines
American Airlines American AirlinesCheapest· From $561 Air Canada Air CanadaMost booked
When to travel
April
Cheapest
July
Peak season for travel
Route details
16,251.57 km
Flight distance

Find flight deals from Boston to Sydney for the next 3 months. Book one way flights from $561 or round trip flights from $1,189.

      • BOS 11:50 AM
        29h 10m
        1 stop
        SYD 7:00 AM
        Boston - Sydney | Thu, Aug 20 | United Airlines
        SYD 10:20 AM
        20h 47m
        1 stop
        BOS 5:07 PM
        Sydney - Boston | Thu, Aug 27 | United Airlines
        $1,189 $1,587
        25% off
        25% off
        $1,587 $1,189
      • BOS 5:51 AM
        35h 4m
        1 stop
        SYD 6:55 AM
        Boston - Sydney | Thu, Aug 20 | Qantas Airways
        SYD 12:00 PM
        21h 42m
        1 stop
        BOS 7:42 PM
        Sydney - Boston | Thu, Aug 27 | Qantas Airways
        $1,207 $1,587
        24% off
        24% off
        $1,587 $1,207
      • BOS 4:15 PM
        24h 35m
        1 stop
        SYD 6:50 AM
        Boston - Sydney | Thu, Aug 20 | Delta Air Lines
        SYD 9:15 AM
        28h 36m
        1 stop
        BOS 11:51 PM
        Sydney - Boston | Thu, Aug 27 | Delta Air Lines
        $1,226 $1,587
        23% off
        23% off
        $1,587 $1,226
      • BOS 6:25 AM
        34h 25m
        1 stop
        SYD 6:50 AM
        Boston - Sydney | Mon, Aug 10 | Delta Air Lines
        SYD 9:15 AM
        24h 10m
        1 stop
        BOS 7:25 PM
        Sydney - Boston | Mon, Aug 17 | Delta Air Lines
        $1,242
        22% off
        $1,587 $1,242
      • BOS 6:26 PM
        22h 34m
        1 stop
        SYD 7:00 AM
        Boston - Sydney | Mon, Aug 10 | United Airlines
        SYD 10:20 AM
        20h 47m
        1 stop
        BOS 5:07 PM
        Sydney - Boston | Mon, Aug 17 | United Airlines
        $1,255
        21% off
        $1,587 $1,255
      • BOS 10:30 AM
        30h 35m
        1 stop
        SYD 7:05 AM
        Boston - Sydney | Thu, Aug 20 | American Airlines
        SYD 10:20 AM
        20h 47m
        1 stop
        BOS 5:07 PM
        Sydney - Boston | Thu, Aug 27 | United Airlines
        $1,269
        20% off
        $1,587 $1,269
      • BOS 10:30 AM
        30h 35m
        1 stop
        SYD 7:05 AM
        Boston - Sydney | Mon, Aug 10 | Qantas Airways
        SYD 5:50 PM
        36h 54m
        1 stop
        BOS 4:44 PM
        Sydney - Boston | Mon, Aug 17 | Qantas Airways
        $1,276
        20% off
        $1,587 $1,276
      • BOS 10:30 AM
        30h 35m
        1 stop
        SYD 7:05 AM
        Boston - Sydney | Mon, Aug 10 | American Airlines
        SYD 5:50 PM
        27h 46m
        1 stop
        BOS 7:36 AM
        Sydney - Boston | Mon, Aug 17 | American Airlines
        $1,281
        19% off
        $1,587 $1,281
      • BOS 6:25 AM
        34h 25m
        1 stop
        SYD 6:50 AM
        Boston - Sydney | Mon, Aug 24 | Delta Air Lines
        SYD 9:15 AM
        24h 10m
        1 stop
        BOS 7:25 PM
        Sydney - Boston | Mon, Aug 31 | Delta Air Lines
        $1,290
        19% off
        $1,587 $1,290
      • BOS 9:01 AM
        31h 54m
        1 stop
        SYD 6:55 AM
        Boston - Sydney | Fri, Jul 31 | Qantas Airways
        SYD 9:10 AM
        21h 28m
        1 stop
        BOS 4:38 PM
        Sydney - Boston | Mon, Aug 3 | American Airlines
        $1,301
        18% off
        $1,587 $1,301
      • BOS 1:00 PM
        17h 25m
        1 stop
        SYD 2:00 PM
        Boston - Sydney | Sat, Jul 25 | Normal Airline
        SYD 3:00 PM
        6h
        Nonstop
        BOS 4:00 PM
        Sydney - Boston | Mon, Jul 27 | Normal Airline
        Find more flights
        Find more flights
      • BOS 10:30 AM
        30h 35m
        1 stop
        SYD 7:05 AM
        Boston - Sydney | Tue, Jul 28 | American Airlines
        $561 $774
        28% off
        28% off
        $774 $561
      • BOS 10:55 AM
        29h 55m
        1 stop
        SYD 6:50 AM
        Boston - Sydney | Mon, Aug 31 | Delta Air Lines
        $575 $774
        26% off
        26% off
        $774 $575
      • BOS 5:45 PM
        23h 20m
        1 stop
        SYD 7:05 AM
        Boston - Sydney | Mon, Aug 31 | Qantas Airways
        $580 $774
        25% off
        25% off
        $774 $580
      • BOS 10:46 AM
        30h 9m
        1 stop
        SYD 6:55 AM
        Boston - Sydney | Fri, Aug 14 | Qantas Airways
        $582
        25% off
        $774 $582
      • BOS 6:00 AM
        35h
        1 stop
        SYD 7:00 AM
        Boston - Sydney | Fri, Aug 14 | United Airlines
        $598
        23% off
        $774 $598
      • BOS 8:15 AM
        32h 40m
        1 stop
        SYD 6:55 AM
        Boston - Sydney | Sun, Aug 23 | Qantas Airways
        $611
        21% off
        $774 $611
      • BOS 5:33 PM
        23h 32m
        1 stop
        SYD 7:05 AM
        Boston - Sydney | Mon, Jul 27 | American Airlines
        $623
        20% off
        $774 $623
      • BOS 4:30 PM
        24h 20m
        1 stop
        SYD 6:50 AM
        Boston - Sydney | Wed, Aug 19 | Delta Air Lines
        $624
        19% off
        $774 $624
      • BOS 9:07 AM
        31h 48m
        1 stop
        SYD 6:55 AM
        Boston - Sydney | Sun, Jul 26 | United Airlines
        $631
        18% off
        $774 $631
      • BOS 9:20 AM
        31h 35m
        1 stop
        SYD 6:55 AM
        Boston - Sydney | Wed, Aug 19 | United Airlines
        $634
        18% off
        $774 $634
      • BOS 1:00 PM
        17h 25m
        1 stop
        SYD 2:00 PM
        Boston - Sydney | Sat, Jul 25 | Normal Airline
        Find more flights
        Find more flights

Find cheap airlines flights from Boston to Sydney

You can choose from 1 airlines that fly from Boston to Sydney, including Air Canada, American Airlines has lowest fares on this route.
Air Canada logo Air Canada
Airlines are determined based on actual purchased flight tickets from Boston to Sydney according to previous 12 months data from Trip.com.

Trip.com price insights on flights from Boston to Sydney

Which month has the cheapest one-way flights from Boston to Sydney?

The average price of one-way flights from Boston to Sydney purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from Boston to Sydney is April, with an average price of $532; while the month with the highest flight price is usually June, with an average price of up to $1,272.

$1,272
$902
$532
$162
    Cheapest
  • $1,058
    Jul
  • $1,053
    Aug
  • $885
    Sep
  • $810
    Oct
  • $630
    Nov
  • $1,108
    Dec
  • $956
    Jan
  • $613
    Feb
  • $640
    Mar
  • $532
    Apr
  • $762
    May
  • $1,272
    Jun

Frequently Asked Questions

  • What are the cheapest flights from Boston to Sydney (BOS-SYD)?

    Based on Trip.com data, American Airlines offers one-way fares as low as $561 on Cheapest nonstop routes (e.g. BOS to SYD on Tue, Jul 28), while United Airlines offers Cheapest nonstop round-trips from $1,189 departing on Thu, Aug 20 and returning on Thu, Aug 27.
  • At the moment, you can catch a nonstop flight from Boston to Sydney with the following airlines, including: Jetblue Airways Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Boston to Sydney is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Boston to Sydney, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Jul 28, with one-way flights priced at just $561.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is American Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Sydney travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Boston to Sydney is August, when demand for travel is lower.
  • After crunching the numbers on our July flight calendar, it's currently cheapest to fly from Boston to Sydney on July 28, 2026 with United Airlines, with prices starting at $621.
  • You can land at any one of the following hubs in Sydney, with Boston Logan International Airport to Sydney Airport (BOS-SYD) is by far the most common option on this route: Sydney Airport (SYD) Western Sydney International Airport (WSI).
  • The time difference between Sydney and Boston is 15h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

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Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.