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Cheap flights from Boston to Sydney from $732

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SYD
18 Jun — 25 Jun1
1 adult

Cheapflights Tip: The best prices from Boston Logan Intl to Sydney Kingsford Smith are usually found in April or March, booked 62 days in advance, depart on a Tuesday or Saturday and return on a Sunday

Cheap flight deals from Boston to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 13 June 2025.

Round-trip from

$2,079

One-way from

$771

Popular in

December

Cheapest in

April

Average price

$2,278
Qantas Airways
  • Qantas Airways
  • 1/11-15/11
  • 2 total stops
  • 52h 13m total
  • Boston to Sydney
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19/8
  • 19/8
  • 3 total stops
  • 41h 10m total
  • Boston to Sydney
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($466 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($93 potential savings vs. average return price).
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Average for round-trip flights in June 2025
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Find flight deals from Boston to Sydney

Cheapest flights from Boston to Sydney
Explore the most affordable flight options available from Boston to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Sat 1/1117:30BOS - SYD
1 stop24h 30mQantas Airways
Sat 15/1111:15SYD - BOS
1 stop27h 43mQantas Airways
Deal found 11/6$2,079
Fri 17/1010:20BOS - SYD
2 stops31h 00mAir Canada
Mon 27/1010:20SYD - BOS
2 stops24h 58mAir Canada
Deal found 13/6$2,085
Sat 15/1116:18BOS - SYD
2 stops28h 12mFiji Airways
Wed 10/1214:00SYD - BOS
2 stops25h 02mFiji Airways
Deal found 12/6$2,088
Sat 23/807:45BOS - SYD
3 stops33h 45mAlaska Airlines
Thu 4/917:45SYD - BOS
2 stops35h 15mAlaska Airlines
Deal found 12/6$2,098
Mon 20/1022:00BOS - SYD
1 stop29h 10mQatar Airways
Mon 27/1021:40SYD - BOS
1 stop32h 15mQatar Airways
Deal found 11/6$2,102
Wed 27/821:35BOS - SYD
2 stops31h 25mTurkish Airlines
Tue 2/920:55SYD - BOS
2 stops36h 45mTurkish Airlines
Deal found 13/6$2,105
Mon 15/918:00BOS - SYD
1 stop23h 05mMultiple Airlines
Sat 20/909:20SYD - BOS
2 stops26h 05mMultiple Airlines
Deal found 11/6$2,115
Fri 14/1109:50BOS - SYD
2 stops30h 55mAir New Zealand
Mon 8/1211:45SYD - BOS
2 stops27h 18mAir New Zealand
Deal found 13/6$2,125
Fri 22/818:07BOS - SYD
1 stop22h 58mAmerican Airlines
Mon 1/909:10SYD - BOS
1 stop27h 24mAmerican Airlines
Deal found 10/6$2,155
Wed 13/810:50BOS - SYD
1 stop29h 45mDelta
Tue 19/809:25SYD - BOS
1 stop23h 59mDelta
Deal found 10/6$2,198
Thu 28/818:20BOS - SYD
1 stop22h 40mUnited Airlines
Tue 2/909:30SYD - BOS
2 stops28h 16mUnited Airlines
Deal found 11/6$2,206
Sat 25/1022:15BOS - SYD
1 stop29h 35mJetBlue
Sat 1/1121:40SYD - BOS
1 stop32h 15mJetBlue
Deal found 12/6$2,330

Cheapflights 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, Cheapflights users made 647,157 searches. Data last updated 13 June 2025.
Use the filters below to find and compare flights from Boston to Sydney that are best for you.

Fly from

Boston

Fly to

Sydney

Route

Depart

Return

Price

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 1/11

17:30-09:00

1 stop24h 30m

Sydney Kingsford Smith

Sat 15/11

11:15-22:58

1 stop27h 43m

$2,079

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 17/10

10:20-08:20

2 stops31h 00m

Sydney Kingsford Smith

Mon 27/10

10:20-20:18

2 stops24h 58m

$2,085

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 15/11

16:18-12:30

2 stops28h 12m

Sydney Kingsford Smith

Wed 10/12

14:00-23:02

2 stops25h 02m

$2,088

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 23/8

07:45-07:30

3 stops33h 45m

Sydney Kingsford Smith

Thu 4/9

17:45-15:00

2 stops35h 15m

$2,098

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 20/10

22:00-18:10

1 stop29h 10m

Sydney Kingsford Smith

Mon 27/10

21:40-14:55

1 stop32h 15m

$2,102

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 27/8

21:35-19:00

2 stops31h 25m

Sydney Kingsford Smith

Tue 2/9

20:55-19:40

2 stops36h 45m

$2,105

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 15/9

18:00-07:05

1 stop23h 05m

Sydney Kingsford Smith

Sat 20/9

09:20-21:25

2 stops26h 05m

$2,115

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 14/11

09:50-08:45

2 stops30h 55m

Sydney Kingsford Smith

Mon 8/12

11:45-23:03

2 stops27h 18m

$2,125

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 22/8

18:07-07:05

1 stop22h 58m

Sydney Kingsford Smith

Mon 1/9

09:10-22:34

1 stop27h 24m

$2,155

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 13/8

10:50-06:35

1 stop29h 45m

Sydney Kingsford Smith

Tue 19/8

09:25-19:24

1 stop23h 59m

$2,198

Flights are sorted by cheapest return flights first.

Deals found on 10/6

Showing 1-10 of 26 results
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Best time to book a flight from Boston to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Boston with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Sydney

How far ahead should I book a flight from Boston to Sydney?

Use this chart to determine the optimal time to book a return flight from Boston to Sydney. Price data was last updated on 9 June 2025.

The best time to book flights from Boston to Sydney is 62 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Boston to Sydney?

Currently, May is the cheapest month in which you can book a flight from Boston to Sydney (average of $129). Flying from Boston to Sydney in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to SYD?

Find hourly flight availability from Boston to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 June 2025.

One of the essential ways to save on airfare from Boston to Sydney is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 32% on airfare.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Sydney when rainfall is around 50.0 mm.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated 13 June 2025.
See what other customers who have flown with Air Tahiti Nui, Korean Air and Japan Airlines from Boston to Sydney have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.7
Very Good
64 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Korean Air
8.4
Very Good
1,091 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Japan Airlines
8.3
Very Good
1,490 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Fiji Airways
8.1
Very Good
194 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Emirates
8.1
Very Good
3,265 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Food

7.8

Boarding

8.7

Comfort

8.1

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Related info for your journey

Find useful and relevant information for your journey from Boston to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Boston to Sydney round-trip?

    Flying on Qantas Airways is currently your cheapest option to Sydney, with prices starting at $2,079. Additional round-trip tickets that might be worth considering are offered by Air Canada and Fiji Airways, with the lowest prices starting at $2,085 and $2,088, respectively. Qantas Airways is 4% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Boston to Sydney one-way?

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as $935. Users have also found prices from $979 and $998 on Qantas Airways and Fiji Airways, respectively.

  • Can I find deals for flights from Boston to Sydney that include hotel bookings?

    Yes. In addition to deals on Boston to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Boston to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Sydney.

  • Can I find deals for business class flights from Boston to Sydney?

    Yes. Cheapflights offers flight deals from Boston to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Sydney?

    Currently, May is the cheapest month in which you can book a flight from Boston to Sydney (average of $129). Flying from Boston to Sydney in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Boston?

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

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Boston to Sydney

Discover the top 3 airlines that operate flights from Boston to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 13 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,171Average$1,906FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,251Average$1,908FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$2,103Average$2,445FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Boston to Sydney?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Boston to Sydney. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Boston to Sydney?

Cheapflights helps you find that perfect flight to Sydney from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Boston to Sydney with no change fees?

Certainly. Search results for flights to Sydney from Boston shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Boston to Sydney become cheaper?

Of course! You can now track prices for flights from Boston to Sydney and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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