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Cheap flights from Boston to Sydney from $761

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 22/4. 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

Enter your travel dates to find the best prices.
Qantas Airways Logo
17:20 - 09:00
BOS
-
SYD
23h 40m
1 stop
Qantas Airways Logo
07:05 - 17:56
SYD
-
BOS
26h 51m
2 stops
$1,403Qantas Airways
Mon, 26 Jan - Sat, 7 Feb
Qantas Airways Logo
17:20 - 07:35
BOS
-
SYD
46h 15m
2 stops
Qantas Airways Logo
11:20 - 20:58
SYD
-
BOS
25h 38m
1 stop
$1,406Qantas Airways
Tue, 27 Jan - Tue, 10 Feb
Qantas Airways Logo
19:00 - 09:10
BOS
-
SYD
46h 10m
2 stops
Qantas Airways Logo
11:20 - 20:58
SYD
-
BOS
25h 38m
1 stop
$1,407Qantas Airways
Mon, 26 Jan - Sat, 7 Feb
Qantas Airways Logo
16:50 - 09:00
BOS
-
SYD
24h 10m
1 stop
Qantas Airways Logo
19:15 - 18:40
SYD
-
BOS
39h 25m
2 stops
$1,436Qantas Airways
Thu, 26 Feb - Tue, 3 Mar
Qantas Airways Logo
19:00 - 20:50
BOS
-
SYD
33h 50m
2 stops
Qantas Airways Logo
11:20 - 17:56
SYD
-
BOS
22h 36m
1 stop
$1,437Qantas Airways
Sun, 1 Feb - Sun, 8 Feb
Qantas Airways Logo
08:00 - 07:35
BOS
-
SYD
55h 35m
2 stops
Qantas Airways Logo
11:20 - 19:31
SYD
-
BOS
23h 11m
1 stop
$1,457Qantas Airways
Sun, 8 Feb - Tue, 10 Mar
Qantas Airways Logo
17:20 - 09:00
BOS
-
SYD
23h 40m
1 stop
Qantas Airways Logo
19:15 - 18:40
SYD
-
BOS
39h 25m
2 stops
$1,485Qantas Airways
Mon, 9 Feb - Mon, 16 Feb
Qantas Airways Logo
17:20 - 17:40
BOS
-
SYD
32h 20m
2 stops
Qantas Airways Logo
11:20 - 17:56
SYD
-
BOS
22h 36m
1 stop
$1,489Qantas Airways
Wed, 4 Feb - Wed, 11 Feb
Multiple Airlines Logo
07:11 - 12:35
BOS
-
SYD
37h 24m
2 stops
Multiple Airlines Logo
14:00 - 23:58
SYD
-
BOS
25h 58m
2 stops
$1,504Multiple Airlines
Wed, 11 Feb - Wed, 18 Feb
Qantas Airways Logo
08:00 - 09:00
BOS
-
SYD
33h 00m
1 stop
Qantas Airways Logo
19:15 - 18:40
SYD
-
BOS
39h 25m
2 stops
$1,506Qantas Airways
Tue, 10 Feb - Sat, 14 Feb

Qantas Airways flights from Boston to Sydney

Our best Qantas Airways deals on Boston to Sydney flight tickets
Qantas Airways
26 Jan
BOS17:20Boston Logan Intl
23h 40m
1 stop
SYD09:00Sydney Kingsford Smith
7 Feb
SYD07:05Sydney Kingsford Smith
26h 51m
2 stops
BOS17:56Boston Logan Intl
$1,403
Qantas Airways
18 Mar
BOS17:20Boston Logan Intl
24h 40m
1 stop
SYD09:00Sydney Kingsford Smith
24 Mar
SYD17:50Sydney Kingsford Smith
42h 10m
2 stops
BOS21:00Boston Logan Intl
$1,407
Qantas Airways
27 Jan
BOS08:00Boston Logan Intl
33h 00m
1 stop
SYD09:00Sydney Kingsford Smith
10 Feb
SYD19:15Sydney Kingsford Smith
38h 41m
2 stops
BOS17:56Boston Logan Intl
$1,436

Air New Zealand flights from Boston to Sydney

Our best Air New Zealand deals on Boston to Sydney flight tickets
Air New Zealand
10 Apr
BOS10:40Boston Logan Intl
30h 40m
2 stops
SYD07:20Sydney Kingsford Smith
20 Apr
SYD09:20Sydney Kingsford Smith
27h 18m
1 stop
BOS22:38Boston Logan Intl
$1,703
Air New Zealand
28 Jan
BOS07:55Boston Logan Intl
33h 20m
1 stop
SYD09:15Sydney Kingsford Smith
4 July
SYD09:30Sydney Kingsford Smith
21h 08m
1 stop
BOS16:38Boston Logan Intl
$2,278

momondo Fare Finder

 
Customise 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, momondo users made 78,305 searches. Data last updated 15 January 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

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 26/1

17:20-09:00

1 stop23h 40m

Sydney Kingsford Smith

Sat 7/2

07:05-17:56

2 stops26h 51m

$1,403

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 27/1

17:20-07:35

2 stops46h 15m

Sydney Kingsford Smith

Tue 10/2

11:20-20:58

1 stop25h 38m

$1,406

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 26/1

19:00-09:10

2 stops46h 10m

Sydney Kingsford Smith

Sat 7/2

11:20-20:58

1 stop25h 38m

$1,407

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Thu 26/2

16:50-09:00

1 stop24h 10m

Sydney Kingsford Smith

Tue 3/3

19:15-18:40

2 stops39h 25m

$1,436

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 1/2

19:00-20:50

2 stops33h 50m

Sydney Kingsford Smith

Sun 8/2

11:20-17:56

1 stop22h 36m

$1,437

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 8/2

08:00-07:35

2 stops55h 35m

Sydney Kingsford Smith

Tue 10/3

11:20-19:31

1 stop23h 11m

$1,457

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 9/2

17:20-09:00

1 stop23h 40m

Sydney Kingsford Smith

Mon 16/2

19:15-18:40

2 stops39h 25m

$1,485

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 4/2

17:20-17:40

2 stops32h 20m

Sydney Kingsford Smith

Wed 11/2

11:20-17:56

1 stop22h 36m

$1,489

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 11/2

07:11-12:35

2 stops37h 24m

Sydney Kingsford Smith

Wed 18/2

14:00-23:58

2 stops25h 58m

$1,504

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 10/2

08:00-09:00

1 stop33h 00m

Sydney Kingsford Smith

Sat 14/2

19:15-18:40

2 stops39h 25m

$1,506

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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 typical price of a round-trip flight between Boston and Sydney?

What is the cheapest month to fly to Sydney?

The month of March is, on average, the cheapest month to fly to Sydney from Boston, with most prices found around $1,787. If you aren’t able to travel to Sydney during the month of March, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $1,817.

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 $2,118 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 $1,850 on momondo.

Can stopping save me money on Boston to Sydney flights?

You could potentially save up to 20% 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 January 2026, prices for Boston to Sydney flights are approximately 21% 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

Fastest flight time

22h 55m

Direct flights

None
The fastest flight from Boston to Sydney takes 22h 55m
There are no direct flights from Boston to Sydney. There are no popular flight routes from Boston to Sydney.
Search flight deals

  • 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 55m 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
United AirlinesPriceFrom $1,217Free cancellationRating
7.4
9,163 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $1,468Free cancellationRating
7.5
971 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $1,482Free cancellationRating
7.2
11,131 reviews
Search American Airlines flights

Travelling to a place near Sydney?

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