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Cheap flights from Boston to Sydney from $821

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 25/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from Boston to Sydney.
 Logo
08:00 - 19:45BOS-SYD
45h 45m1 stop
 Logo
16:20 - 17:52SYD-BOS
39h 32m2 stops
$1,862
Find Deal
Fri, 16 May - Fri, 23 May
 Logo
12:59 - 12:15BOS-SYD
33h 16m2 stops
 Logo
16:20 - 06:00SYD-BOS
27h 40m1 stop
$1,875
Find Deal
Thu, 1 May - Thu, 15 May
Air Canada Logo
15:20 - 07:20BOS-SYD
26h 00m2 stops
Air Canada Logo
09:20 - 11:28SYD-BOS
40h 08m2 stops
$1,886Air Canada
Find Deal
Sun, 18 May - Sun, 1 Jun
Air Canada Logo
10:20 - 07:20BOS-SYD
31h 00m3 stops
Air Canada Logo
09:20 - 09:35SYD-BOS
38h 15m3 stops
$1,895Air Canada
Find Deal
Sun, 18 May - Sun, 1 Jun
Hawaiian Airlines Logo
20:22 - 19:45BOS-SYD
33h 23m2 stops
Hawaiian Airlines Logo
21:40 - 16:32SYD-BOS
32h 52m2 stops
$2,017Hawaiian Airlines
Find Deal
Fri, 16 May - Thu, 29 May
Hawaiian Airlines Logo
08:00 - 19:45BOS-SYD
45h 45m1 stop
Hawaiian Airlines Logo
21:40 - 06:00SYD-BOS
22h 20m1 stop
$2,023Hawaiian Airlines
Find Deal
Sun, 18 May - Sun, 1 Jun
Qantas Airways Logo
08:05 - 07:05BOS-SYD
33h 00m1 stop
Qantas Airways Logo
09:10 - 17:16SYD-BOS
22h 06m1 stop
$2,304Qantas Airways
Find Deal
Tue, 10 Jun - Tue, 24 Jun
Qantas Airways Logo
18:00 - 07:05BOS-SYD
23h 05m1 stop
Qantas Airways Logo
17:45 - 07:00SYD-BOS
27h 15m1 stop
$2,315Qantas Airways
Find Deal
Mon, 19 May - Sun, 1 Jun
United Airlines Logo
09:54 - 07:00BOS-SYD
31h 06m2 stops
United Airlines Logo
10:20 - 06:01SYD-BOS
33h 41m3 stops
$2,485United Airlines
Find Deal
Mon, 19 May - Sun, 1 Jun
United Airlines Logo
15:20 - 07:00BOS-SYD
25h 40m2 stops
United Airlines Logo
09:30 - 19:38SYD-BOS
24h 08m2 stops
$2,493United Airlines
Find Deal
Sun, 8 Jun - Wed, 2 Jul

Air Canada flights from Boston to Sydney

Our best Air Canada deals on Boston to Sydney flight tickets
Air Canada
18 May
BOS15:20Boston Logan Intl
26h 00m
2 stops
SYD07:20Sydney Kingsford Smith
1 June
SYD09:20Sydney Kingsford Smith
40h 08m
2 stops
BOS11:28Boston Logan Intl
Air Canada
18 May
BOS10:20Boston Logan Intl
31h 00m
3 stops
SYD07:20Sydney Kingsford Smith
1 June
SYD09:20Sydney Kingsford Smith
38h 15m
3 stops
BOS09:35Boston Logan Intl
Air Canada
19 May
BOS15:20Boston Logan Intl
26h 00m
2 stops
SYD07:20Sydney Kingsford Smith
26 May
SYD09:20Sydney Kingsford Smith
38h 15m
2 stops
BOS09:35Boston Logan Intl

Hawaiian Airlines flights from Boston to Sydney

Our best Hawaiian Airlines deals on Boston to Sydney flight tickets
Hawaiian Airlines
16 May
BOS20:22Boston Logan Intl
33h 23m
2 stops
SYD19:45Sydney Kingsford Smith
29 May
SYD21:40Sydney Kingsford Smith
32h 52m
2 stops
BOS16:32Boston Logan Intl
Hawaiian Airlines
18 May
BOS08:00Boston Logan Intl
45h 45m
1 stop
SYD19:45Sydney Kingsford Smith
1 June
SYD21:40Sydney Kingsford Smith
22h 20m
1 stop
BOS06:00Boston Logan Intl
Hawaiian Airlines
16 May
BOS08:00Boston Logan Intl
45h 45m
1 stop
SYD19:45Sydney Kingsford Smith
29 May
SYD21:40Sydney Kingsford Smith
22h 20m
1 stop
BOS06:00Boston 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 $2,062. 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 $2,073.

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

Our data shows that Thursday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $0. The most expensive day to fly to Sydney is Friday, with ticket prices averaging around $2,575.

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 $2,152. 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 $3,123 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 9 weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $2,379 when searching 9 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Boston for as low as $2,070 on momondo.

How have Boston to Sydney flight prices changed over time?

As of April 2025, prices for Boston to Sydney flights are approximately 30% 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

$821

Fastest flight time

22h 35m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from Boston in the past 72 hours is $821. The best return flight deal from Boston to Sydney found on momondo in the last 72 hours is $1,862.
The fastest flight from Boston to Sydney takes 22h 35m
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 59m 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 $1,218Free cancellationRating
7.0
9,022 reviews
Search Air Canada flights
United AirlinesPriceFrom $1,302Free cancellationRating
7.4
8,615 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $2,187Free cancellationRating
7.5
813 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
Katoomba
Terrigal
Lithgow
Penrith
Leura
Manly
Coogee
Cronulla
Bondi Beach
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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