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$477+ Cheap flights from Boston (BOS) to Sydney (SYD)

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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SYD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 Wednesday or Tuesday and return on a Thursday

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 June 12, 2025.

Round-trip from

$1,352
(Gurufare)

One-way from

$477
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,484
From Boston Logan Intl to Sydney Kingsford Smith
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One-way flight from Boston Logan Intl to Sydney Kingsford Smith
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Highest demand for flights based on searches. 12% potential increase in price ($198 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($39 potential savings vs. average RT 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 June 12, 2025.

This Gurufare deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/97:05 amBOS - SYD
2 stops35h 20mAir New Zealand
Mon 11/179:55 amSYD - BOS
2 stops27h 40mAir New Zealand
Deal found 6/10$1,351
This KAYAK deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/15:30 pmBOS - SYD
1 stop24h 30mQantas Airways
Sat 11/1511:15 amSYD - BOS
1 stop27h 43mQantas Airways
Deal found 6/11$1,354
This FlightHub deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/183:15 pmBOS - SYD
2 stops26h 05mAir Canada
Fri 10/3110:20 amSYD - BOS
2 stops24h 58mAir Canada
Deal found 6/12$1,358
This FlightHub deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/154:18 pmBOS - SYD
2 stops28h 12mFiji Airways
Wed 12/102:00 pmSYD - BOS
2 stops25h 02mFiji Airways
Deal found 6/12$1,360
This Mytrip deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/271:55 pmBOS - SYD
3 stops31h 50mMultiple Airlines
Sun 10/510:20 amSYD - BOS
3 stops28h 09mMultiple Airlines
Deal found 6/10$1,363
This Alaska Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/237:45 amBOS - SYD
3 stops33h 45mAlaska Airlines
Thu 9/45:45 pmSYD - BOS
2 stops35h 15mAlaska Airlines
Deal found 6/12$1,367
This oojo deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2010:00 pmBOS - SYD
1 stop29h 10mQatar Airways
Mon 10/279:40 pmSYD - BOS
1 stop32h 15mQatar Airways
Deal found 6/11$1,369
This FlightHub deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/189:35 pmBOS - SYD
2 stops31h 25mTurkish Airlines
Thu 12/259:45 pmSYD - BOS
2 stops36h 20mTurkish Airlines
Deal found 6/9$1,377
This American Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:07 pmBOS - SYD
1 stop22h 58mAmerican Airlines
Mon 9/19:10 amSYD - BOS
1 stop27h 24mAmerican Airlines
Deal found 6/10$1,404
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1310:50 amBOS - SYD
1 stop29h 45mDelta
Tue 8/199:25 amSYD - BOS
1 stop23h 59mDelta
Deal found 6/10$1,432
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/76:18 pmBOS - SYD
1 stop22h 37mUnited Airlines
Tue 11/411:20 amSYD - BOS
2 stops23h 12mUnited Airlines
Deal found 6/11$1,441
This Gotogate deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/312:30 amBOS - SYD
1 stop28h 20mCathay Pacific
Wed 11/2610:20 pmSYD - BOS
1 stop39h 40mCathay Pacific
Deal found 6/10$1,524

Cheapflights Fare Finder

Customize 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 2,558,603 searches. Data last updated June 12, 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

Sun 11/9

7:05 am-10:25 am

2 stops35h 20m

Sydney Kingsford Smith

Mon 11/17

9:55 am-9:35 pm

2 stops27h 40m

$1,351

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 11/1

5:30 pm-9:00 am

1 stop24h 30m

Sydney Kingsford Smith

Sat 11/15

11:15 am-10:58 pm

1 stop27h 43m

$1,354

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 10/18

3:15 pm-8:20 am

2 stops26h 05m

Sydney Kingsford Smith

Fri 10/31

10:20 am-8:18 pm

2 stops24h 58m

$1,358

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 11/15

4:18 pm-12:30 pm

2 stops28h 12m

Sydney Kingsford Smith

Wed 12/10

2:00 pm-11:02 pm

2 stops25h 02m

$1,360

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 9/27

1:55 pm-11:45 am

3 stops31h 50m

Sydney Kingsford Smith

Sun 10/5

10:20 am-11:29 pm

3 stops28h 09m

$1,363

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 8/23

7:45 am-7:30 am

3 stops33h 45m

Sydney Kingsford Smith

Thu 9/4

5:45 pm-3:00 pm

2 stops35h 15m

$1,367

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 10/20

10:00 pm-6:10 pm

1 stop29h 10m

Sydney Kingsford Smith

Mon 10/27

9:40 pm-2:55 pm

1 stop32h 15m

$1,369

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 8/18

9:35 pm-7:00 pm

2 stops31h 25m

Sydney Kingsford Smith

Thu 12/25

9:45 pm-6:05 pm

2 stops36h 20m

$1,377

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 8/22

6:07 pm-7:05 am

1 stop22h 58m

Sydney Kingsford Smith

Mon 9/1

9:10 am-10:34 pm

1 stop27h 24m

$1,404

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 8/13

10:50 am-6:35 am

1 stop29h 45m

Sydney Kingsford Smith

Tue 8/19

9:25 am-7:24 pm

1 stop23h 59m

$1,432

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 24 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 round-trip 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 round-trip flight from Boston to Sydney. Price data was last updated on June 9, 2025.

To ensure you get the cheapest price possible for a flight from Boston to Sydney, you should look to book at least 62 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, March is the cheapest month in which you can book a flight from Boston to Sydney (average of $1,041). Flying from Boston to Sydney in December is currently the most expensive (average of $1,635). 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 June 12, 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 evening tend to be the most expensive. A flight in the morning could potentially save you up to 4% on airfare.

What is the cheapest day to fly from Boston to Sydney?

Use this chart to determine the cheapest time to fly round-trip from Boston to Sydney. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Boston to Sydney flight should consider departing on Wednesday at noon when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Sydney when rainfall is around 2.0 in.

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 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

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 June 12, 2025.
Peruse reviews from past customers who have flown with Air Tahiti Nui, Korean Air and Japan Airlines from Boston to Sydney to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very good
64 reviews

Overall

8.7

Entertainment

7.3

Food

7.8

Boarding

8.7

Comfort

8.1

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

Overall

8.7

Entertainment

7.3

Food

7.8

Boarding

8.7

Comfort

8.1

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
1,088 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Overall

8.7

Entertainment

7.3

Food

7.8

Boarding

8.7

Comfort

8.1

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
1,489 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Overall

8.7

Entertainment

7.3

Food

7.8

Boarding

8.7

Comfort

8.1

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

Overall

8.7

Entertainment

7.3

Food

7.8

Boarding

8.7

Comfort

8.1

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.
Delta
8.0
Very good
7,950 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Overall

8.7

Entertainment

7.3

Food

7.8

Boarding

8.7

Comfort

8.1

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?

    Cheapflights users have booked flights from Boston to Sydney round-trip from $1,352. Other airlines that can offer you cheap pricing are Qantas Airways, from $1,354, and Air Canada, from $1,358. You may be able to fly from Boston to Sydney for 5% less than the average price by searching for these airlines.

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

    The cheapest airlines for a one-way flight from Boston to Sydney are Air Canada ($616), Qantas Airways ($641), and Fiji Airways ($650).

  • Where are the most common layover locations when flying from Boston to Sydney?

    Boston to Sydney flights have a layover in Los Angeles most of the time. San Francisco follows Los Angeles in terms of the most common layover location on Boston to Sydney flights.

  • What are some popular things to do or see while on a layover in Los Angeles?

    Most Los Angeles visitors opt to spend their time experiencing Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live. Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live are located about 12.5 mi, 11.7 mi, and 10.8 mi, respectively from Los Angeles. Travelers can rent a car at Los Angeles for an average daily rate of $40 to make sightseeing during their layover a little easier.

  • What are some popular points of interest to see during a layover in San Francisco?

    If you're on a layover in San Francisco and looking for things to do, consider visiting Fisherman's Wharf, Union Square, or Bill Graham Civic Auditorium. Those on a layover in San Francisco interested in visiting Fisherman's Wharf, Union Square, or Bill Graham Civic Auditorium can do so by traveling 13.0 mi, 11.6 mi, and 11.1 mi, respectively from San Francisco. Travelers can rent a car at San Francisco for an average daily rate of $56 to make sightseeing during their layover a little easier.

  • Where are the least popular layover locations for Boston to Sydney flights?

    Flights departing from Boston and landing in Sydney layover in Vancouver least frequently.

  • 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 vacation 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, March is the cheapest month in which you can book a flight from Boston to Sydney (average of $1,041). Flying from Boston to Sydney in December is currently the most expensive (average of $1,635). 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

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Wollongong
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Manly
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Alternative routes for Boston to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
Hartford to Sydney flights

Top 10 airlines flying from Boston to Sydney

Discover the top 10 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 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$248Average$1,473FlexibilityNo cancel feeOn-time62%
Air CanadaCheapest$735Average$1,231FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$824Average$1,417FlexibilityNo cancel feeOn-time69%
DeltaCheapest$825Average$1,291FlexibilityNo cancel feeOn-timeN/A
Fiji AirwaysCheapest$831Average$1,429FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$941Average$1,520FlexibilityNo cancel feeOn-time71%
Qantas AirwaysCheapest$1,195Average$1,479FlexibilityNo cancel feeOn-time74%
Air New ZealandCheapest$1,228Average$1,900FlexibilityNo cancel feeOn-time78%
Qatar AirwaysCheapest$1,295Average$1,733FlexibilityNo cancel feeOn-time68%
Cathay PacificCheapest$1,334Average$1,497FlexibilityNo cancel feeOn-time72%

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