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$523+ 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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SYD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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The best prices from Boston Logan Intl to Sydney Kingsford Smith are usually found in March or August, booked 26 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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$824
(United Airlines)

One-way from

$523
(Air Canada)

Popular in

December

Cheapest in

March

Average price

$1,385
Provider with most accurate pricing for Boston Logan Intl-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Sydney Kingsford Smith flights.
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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. 11% potential increase in price ($192 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Air Canada deal was found by Cheapflights users on 2/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2210:20 amBOS - SYD
2 stops31h 00mAir Canada
Mon 9/19:20 amSYD - BOS
2 stops38h 15mAir Canada
Deal found 2/20$823
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Sat 4/199:30 amBOS - SYD
2 stops31h 30mUnited Airlines
Thu 5/110:20 amSYD - BOS
1 stop26h 00mUnited Airlines
Deal found 2/20$824
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 3/34:04 pmBOS - SYD
2 stops26h 16mAmerican Airlines
Tue 3/1111:15 amSYD - BOS
2 stops24h 09mAmerican Airlines
Deal found 2/20$837
This Delta deal was found by Cheapflights users on 2/19. 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 4/302:45 pmBOS - SYD
1 stop25h 50mDelta
Wed 6/49:25 amSYD - BOS
1 stop28h 39mDelta
Deal found 2/19$866
This Mytrip deal was found by Cheapflights users on 2/20. 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.
Wed 3/197:45 amBOS - SYD
3 stops33h 50mMultiple Airlines
Wed 3/262:00 pmSYD - BOS
3 stops34h 59mMultiple Airlines
Deal found 2/20$1,165

Find flights from Boston to Sydney within your budget

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 February 20, 2025.

Fly from

Boston

Fly to

Sydney

Route

Depart

Return

Price

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 4/19

9:30 am-7:00 am

2 stops31h 30m

Sydney Kingsford Smith

Thu 5/1

10:20 am-10:20 pm

1 stop26h 00m

$824

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 4/11

10:50 am-7:20 am

2 stops30h 30m

Sydney Kingsford Smith

Sat 4/19

9:20 am-9:41 am

2 stops38h 21m

$830

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 3/3

4:04 pm-10:20 am

2 stops26h 16m

Sydney Kingsford Smith

Tue 3/11

11:15 am-8:24 pm

2 stops24h 09m

$837

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 4/30

2:45 pm-6:35 am

1 stop25h 50m

Sydney Kingsford Smith

Wed 6/4

9:25 am-12:04 am

1 stop28h 39m

$866

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 3/19

7:45 am-8:35 am

3 stops33h 50m

Sydney Kingsford Smith

Wed 3/26

2:00 pm-9:59 am

3 stops34h 59m

$1,165

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 3/19

3:40 pm-8:35 am

2 stops25h 55m

$523

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 4/16

7:00 am-2:40 pm

3 stops41h 40m

$624

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 3/19

10:15 pm-6:50 pm

1 stop29h 35m

$694

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 4/15

4:30 pm-6:10 pm

1 stop35h 40m

$718

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 4/6

9:45 pm-5:10 pm

1 stop29h 25m

$825

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 16 results
1
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Compare providers for flights from Boston to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Sydney in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy1 starTrust Score*3 stars
FlightsMojoPrice Accuracy-Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Sydney flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Travel insights for flights from Boston to Sydney

Get recent, data-driven insights about flights from Boston to Sydney including ideal travel times, pricing trends, and more.

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 February 14, 2025.

To ensure you get the cheapest price possible for a flight from Boston to Sydney, you should look to book at least 26 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, February is the cheapest month in which you can book a flight from Boston to Sydney (average of $1,051). Flying from Boston to Sydney in December is currently the most expensive (average of $1,643). 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 February 20, 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 February 20, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta and Cathay Pacific 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.
Alaska Airlines
8.0
Very good
9,697 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines
8.0
Very good
9,697 reviews
Alaska Airlines
8.0
Very good
9,697 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta
8.0
Very good
8,219 reviews
Alaska Airlines
8.0
Very good
9,697 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Cathay Pacific
7.5
Good
820 reviews
Alaska Airlines
8.0
Very good
9,697 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Qatar Airways
7.4
Good
3,613 reviews
Alaska Airlines
8.0
Very good
9,697 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

JetBlue
7.4
Good
3,070 reviews
Alaska Airlines
8.0
Very good
9,697 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 $824. Other airlines that can offer you cheap pricing are Air Canada, from $830, and American Airlines, from $837. You may be able to fly from Boston to Sydney for 45% 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 ($523), Qatar Airways ($694), and Etihad Airways ($718).

  • 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 $32 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 $49 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. Dallas sees the next fewest layovers on Boston to Sydney flights.

  • 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, February is the cheapest month in which you can book a flight from Boston to Sydney (average of $1,051). Flying from Boston to Sydney in December is currently the most expensive (average of $1,643). 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
Parramatta
Coogee
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 9 airlines flying from Boston to Sydney

Discover the top 9 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$216Average$357FlexibilityNo cancel feeOn-time62%
DeltaCheapest$876Average$1,525FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,040Average$1,480FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$1,047Average$1,295FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$1,121Average$1,580FlexibilityNo cancel feeOn-time71%
Cathay PacificCheapest$1,195Average$1,489FlexibilityNo cancel feeOn-time72%
Qantas AirwaysCheapest$1,228Average$1,561FlexibilityNo cancel feeOn-time74%
Air New ZealandCheapest$1,352Average$1,594FlexibilityNo cancel feeOn-time78%
Qatar AirwaysCheapest$1,366Average$2,154FlexibilityNo cancel feeOn-time68%
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