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Cheap flights from Boston to Sydney from $652

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Sydney departing on 12/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Cheap return flights

Qantas Airways Logo
12:15 - 09:00BOS-SYD
28h 45m1 stop
Qantas Airways Logo
19:15 - 23:02SYD-BOS
43h 47m2 stops
$1,595Qantas Airways
Find Deal
Sat, 15 Nov - Wed, 10 Dec
Qantas Airways Logo
12:15 - 09:00BOS-SYD
28h 45m1 stop
Qantas Airways Logo
19:15 - 23:02SYD-BOS
43h 47m2 stops
$1,598Qantas Airways
Find Deal
Sat, 15 Nov - Wed, 10 Dec
ANA Logo
06:00 - 10:25BOS-SYD
37h 25m2 stops
ANA Logo
21:45 - 16:10SYD-BOS
33h 25m2 stops
$1,714ANA
Find Deal
Mon, 20 Oct - Mon, 27 Oct
ANA Logo
06:09 - 09:25BOS-SYD
37h 16m2 stops
ANA Logo
20:55 - 16:43SYD-BOS
33h 48m2 stops
$1,716ANA
Find Deal
Wed, 27 Aug - Tue, 2 Sep
United Airlines Logo
15:16 - 06:55BOS-SYD
25h 39m2 stops
United Airlines Logo
10:20 - 19:19SYD-BOS
22h 59m2 stops
$1,752United Airlines
Find Deal
Thu, 7 Aug - Wed, 20 Aug
United Airlines Logo
18:11 - 06:55BOS-SYD
22h 44m1 stop
United Airlines Logo
10:20 - 23:28SYD-BOS
27h 08m2 stops
$1,757United Airlines
Find Deal
Thu, 7 Aug - Wed, 20 Aug
American Airlines Logo
12:05 - 07:05BOS-SYD
29h 00m1 stop
American Airlines Logo
09:10 - 22:34SYD-BOS
27h 24m1 stop
$1,771American Airlines
Find Deal
Thu, 7 Aug - Wed, 20 Aug
American Airlines Logo
16:15 - 07:05BOS-SYD
24h 50m2 stops
American Airlines Logo
09:10 - 22:34SYD-BOS
27h 24m1 stop
$1,780American Airlines
Find Deal
Mon, 4 Aug - Sun, 17 Aug
 Logo
08:00 - 14:40BOS-SYD
40h 40m1 stop
 Logo
17:45 - 16:28SYD-BOS
36h 43m2 stops
$1,791
Find Deal
Thu, 28 Aug - Thu, 4 Sep
 Logo
06:00 - 07:05BOS-SYD
35h 05m2 stops
 Logo
09:10 - 06:00SYD-BOS
34h 50m2 stops
$1,878
Find Deal
Fri, 15 Aug - Sun, 31 Aug

Qantas Airways flights from Boston to Sydney

Our best Qantas Airways deals on Boston to Sydney flight tickets
Qantas Airways
15 Nov
BOS12:15Boston Logan Intl
28h 45m
1 stop
SYD09:00Sydney Kingsford Smith
10 Dec
SYD19:15Sydney Kingsford Smith
43h 47m
2 stops
BOS23:02Boston Logan Intl
Qantas Airways
15 Nov
BOS12:15Boston Logan Intl
28h 45m
1 stop
SYD09:00Sydney Kingsford Smith
10 Dec
SYD19:15Sydney Kingsford Smith
43h 47m
2 stops
BOS23:02Boston Logan Intl
Qantas Airways
31 Oct
BOS14:44Boston Logan Intl
29h 11m
2 stops
SYD10:55Sydney Kingsford Smith
7 Nov
SYD14:20Sydney Kingsford Smith
20h 35m
1 stop
BOS18:55Boston Logan Intl

United Airlines flights from Boston to Sydney

Our best United Airlines deals on Boston to Sydney flight tickets
United Airlines
7 Aug
BOS15:16Boston Logan Intl
25h 39m
2 stops
SYD06:55Sydney Kingsford Smith
20 Aug
SYD10:20Sydney Kingsford Smith
22h 59m
2 stops
BOS19:19Boston Logan Intl
United Airlines
7 Aug
BOS18:11Boston Logan Intl
22h 44m
1 stop
SYD06:55Sydney Kingsford Smith
20 Aug
SYD10:20Sydney Kingsford Smith
27h 08m
2 stops
BOS23:28Boston Logan Intl
United Airlines
7 Aug
BOS18:11Boston Logan Intl
22h 44m
1 stop
SYD06:55Sydney Kingsford Smith
20 Aug
SYD10:20Sydney Kingsford Smith
20h 53m
1 stop
BOS17:13Boston Logan Intl

See travel insights to Sydney from

How to get the cheapest flight ticket from Boston to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Sydney?

The month of April is, on average, the cheapest month to fly to Sydney from Boston, with most prices found around $1,933. If you aren’t able to travel to Sydney during the month of April, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $1,939.

What is the cheapest day to depart on your flight to Sydney?

Our data shows that Tuesday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $2,064. The most expensive day to fly to Sydney is Friday, with ticket prices averaging around $2,468.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the evening. momondo users have found flights departing from Boston to Sydney in the evening for as low as $2,063. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $2,993 on average. Flights to Sydney from Boston in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to Sydney?

You are more likely to see cheaper flights to Sydney from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $2,193 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Boston for as low as $1,889 on momondo.

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 21% on your flight if you consider stops on a Boston to Sydney flight.

How have Boston to Sydney flight prices changed over time?

As of June 2025, prices for Boston to Sydney flights are approximately 20% cheaper when compared to flights at the same time last year.

When to book flights from Boston to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Sydney according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Boston to Sydney (BOS to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Sydney

Best price found

$652

Fastest flight time

22h 37m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from Boston in the past 72 hours is $652. The best return flight deal from Boston to Sydney found on momondo in the last 72 hours is $1,595.
The fastest flight from Boston to Sydney takes 22h 37m
There are no direct flights from Boston to Sydney. Popular non-direct route for this connection is Boston Logan Intl Airport - Sydney Kingsford Smith Airport.
There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)

  • How far is Boston Logan Intl to Sydney Kingsford Smith by plane?

    The straight-line distance from Boston Logan Intl to Sydney Kingsford Smith is 16229.2 km. Typically, this will take 22h 20m by plane in normal conditions.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

    Prices for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport refresh daily.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to Sydney Kingsford Smith Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Sydney Kingsford Smith Airport.

  • What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

    The travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Boston to Sydney?


Best airlines flying from Boston to Sydney

Compare and see reviews for airlines that fly from Boston to Sydney with momondo
Airline
Rating
Free cancellation
Price
Air CanadaPriceFrom $1,167Free cancellationRating
7.1
9,650 reviews
Search Air Canada flights
United AirlinesPriceFrom $1,247Free cancellationRating
7.4
8,844 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $2,097Free cancellationRating
7.5
866 reviews
Search Qantas Airways flights

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Terrigal
Lithgow
Katoomba
Penrith
Leura
Manly
Coogee
Bondi Beach
Cronulla
Randwick
Charlestown
Newport
Swansea

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Sydney?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Sydney from Boston.

Can I find flights from Boston to Sydney with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sydney from Boston with this policy.

How can momondo help me find flights from Boston to Sydney?

Once you have performed a search for Boston to Sydney flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Boston to Sydney right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Sydney, momondo offers a useful price alert feature which will track prices for flights to Sydney from Boston and alert you when they change.


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