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Cheap flights from Boston to Sydney from $856

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SYD
31 Mar — 7 Apr1
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 26 March 2025.

Round-trip from

$1,970

One-way from

$856

Popular in

December

Cheapest in

April

Average price

$2,051
Air Canada
  • Air Canada
  • 13/5-18/5
  • 4 total stops
  • 69h 15m total
  • Boston to Sydney
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23/8
  • 23/8
  • 2 total stops
  • 38h 10m total
  • Boston to Sydney
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($549 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($108 potential savings vs. average return price).
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Average for round-trip flights in March 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 26 March 2025.

Thu 27/308:00BOS - SYD
1 stop40h 35mMultiple Airlines
Wed 9/409:45SYD - BOS
2 stops34h 15mMultiple Airlines
Deal found 25/3$1,876
Tue 13/510:20BOS - SYD
2 stops31h 00mAir Canada
Sun 18/509:20SYD - BOS
2 stops38h 15mAir Canada
Deal found 25/3$1,970
Tue 25/317:58BOS - SYD
2 stops27h 32mFiji Airways
Tue 1/406:15SYD - BOS
2 stops32h 14mFiji Airways
Deal found 24/3$2,103
Tue 1/421:35BOS - SYD
2 stops31h 25mTurkish Airlines
Tue 15/420:55SYD - BOS
2 stops36h 45mTurkish Airlines
Deal found 24/3$2,157
Mon 3/1121:15BOS - SYD
1 stop29h 35mQatar Airways
Mon 1/1221:40SYD - BOS
1 stop32h 15mQatar Airways
Deal found 25/3$2,179
Wed 28/508:00BOS - SYD
1 stop33h 05mQantas Airways
Mon 16/609:10SYD - BOS
1 stop22h 06mQantas Airways
Deal found 25/3$2,189
Sun 9/1106:00BOS - SYD
2 stops33h 25mAlaska Airlines
Mon 17/1117:25SYD - BOS
1 stop28h 52mAlaska Airlines
Deal found 25/3$2,232
Tue 25/301:30BOS - SYD
1 stop41h 05mCathay Pacific
Wed 2/422:20SYD - BOS
1 stop39h 40mCathay Pacific
Deal found 25/3$2,322
Mon 14/422:00BOS - SYD
1 stop29h 10mJetBlue
Mon 21/420:45SYD - BOS
1 stop32h 20mJetBlue
Deal found 25/3$2,341
Fri 22/816:15BOS - SYD
2 stops24h 50mAmerican Airlines
Mon 1/909:10SYD - BOS
2 stops23h 15mAmerican Airlines
Deal found 25/3$2,346
Sun 4/518:14BOS - SYD
1 stop22h 46mUnited Airlines
Tue 20/509:30SYD - BOS
2 stops24h 41mUnited Airlines
Deal found 25/3$2,354
Sat 3/508:33BOS - SYD
2 stops34h 12mAir New Zealand
Sat 17/518:20SYD - BOS
2 stops51h 06mAir New Zealand
Deal found 24/3$2,367

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 26 March 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

Tue 13/5

10:20-07:20

2 stops31h 00m

Sydney Kingsford Smith

Sun 18/5

09:20-09:35

2 stops38h 15m

$1,970

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Thu 8/5

12:59-12:15

2 stops33h 16m

Sydney Kingsford Smith

Thu 15/5

16:20-06:00

1 stop27h 40m

$1,976

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 28/5

08:00-07:05

1 stop33h 05m

Sydney Kingsford Smith

Mon 16/6

09:10-17:16

1 stop22h 06m

$2,189

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 10/8

22:00-06:15

1 stop42h 15m

Sydney Kingsford Smith

Sun 30/11

21:40-13:55

1 stop32h 15m

$2,230

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 15/4

18:04-22:10

2 stops38h 06m

Sydney Kingsford Smith

Tue 22/4

06:15-23:44

2 stops31h 29m

$2,287

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 7/5

19:47-19:45

2 stops33h 58m

Sydney Kingsford Smith

Sat 31/5

21:40-18:59

1 stop35h 19m

$2,289

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 10/8

21:35-19:00

2 stops31h 25m

Sydney Kingsford Smith

Sun 30/11

21:15-18:05

2 stops36h 50m

$2,292

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 24/8

01:40-20:10

1 stop28h 30m

Sydney Kingsford Smith

Mon 15/9

21:50-23:00

1 stop39h 10m

$2,322

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 14/4

22:00-17:10

1 stop29h 10m

Sydney Kingsford Smith

Mon 21/4

20:45-15:05

1 stop32h 20m

$2,341

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 22/8

16:15-07:05

2 stops24h 50m

Sydney Kingsford Smith

Mon 1/9

09:10-18:25

2 stops23h 15m

$2,346

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 31 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 21 March 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 26 March 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 26 March 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
61 reviews
Check prices

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Comfort

8.0

Overall

8.7

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
61 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Comfort

8.0

Overall

8.7

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
1,049 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Comfort

8.0

Overall

8.7

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
1,440 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Comfort

8.0

Overall

8.7

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
8.0
Very Good
182 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Comfort

8.0

Overall

8.7

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
8.0
Very Good
3,190 reviews
Air Tahiti Nui
8.7
Very Good
61 reviews
Check prices

Food

7.8

Boarding

8.7

Crew

9.1

Entertainment

7.2

Comfort

8.0

Overall

8.7

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 Air Canada is currently your cheapest option to Sydney, with prices starting at $1,970. Additional round-trip tickets that might be worth considering are offered by Qantas Airways and Qatar Airways, with the lowest prices starting at $2,189 and $2,230, respectively. Air Canada is 16% 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 Qatar Airways. According to our data, you can fly for as low as $1,100. Users have also found prices from $1,106 and $1,236 on Etihad Airways and Qantas 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
Cronulla
Randwick
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 26 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,210Average$2,241FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,294Average$2,036FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$2,174Average$2,464FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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