Sydney

$487+ 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SYD
Apr 20 — Apr 271
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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 April 15, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,113
(Kiwi.com)

One-way from

$487
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,266
Provider with most accurate pricing for Boston Logan Intl-Sydney Kingsford Smith flight deals.
Provider most trusted by Cheapflights users for Boston Logan Intl-Sydney Kingsford Smith flights.
From Boston Logan Intl to Sydney Kingsford Smith
One-way flight from Boston Logan Intl to Sydney Kingsford Smith
Highest demand for flights based on searches. 12% potential increase in price ($219 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($44 potential savings vs. average RT price).
Average for round-trip flights in April 2025

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 April 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/58:00 amBOS - SYD
1 stop40h 40mMultiple Airlines
Wed 6/184:20 pmSYD - BOS
1 stop27h 40mMultiple Airlines
Deal found 4/14$1,113
This Air Canada deal was found by Cheapflights users on 4/14. 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.
Sun 9/2110:20 amBOS - SYD
2 stops31h 00mAir Canada
Sat 10/410:20 amSYD - BOS
2 stops37h 15mAir Canada
Deal found 4/14$1,237
This Fiji Airways deal was found by Cheapflights users on 4/14. 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 Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/216:19 pmBOS - SYD
2 stops27h 26mFiji Airways
Tue 11/46:00 amSYD - BOS
2 stops33h 06mFiji Airways
Deal found 4/14$1,348
This Gurufare deal was found by Cheapflights users on 4/14. 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.
Fri 8/225:15 pmBOS - SYD
2 stops25h 30mAir New Zealand
Mon 9/19:55 amSYD - BOS
2 stops44h 43mAir New Zealand
Deal found 4/14$1,357
This Alaska Airlines deal was found by Cheapflights users on 4/14. 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.
Tue 8/268:23 pmBOS - SYD
2 stops33h 22mAlaska Airlines
Thu 9/119:40 pmSYD - BOS
1 stop31h 37mAlaska Airlines
Deal found 4/14$1,365
This FlightHub deal was found by Cheapflights users on 4/14. 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 10/2010:00 pmBOS - SYD
1 stop29h 10mQatar Airways
Mon 10/279:40 pmSYD - BOS
1 stop32h 15mQatar Airways
Deal found 4/14$1,366
This lol.travel deal was found by Cheapflights users on 4/14. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/41:40 amBOS - SYD
1 stop43h 10mCathay Pacific
Mon 5/197:40 amSYD - BOS
1 stop29h 20mCathay Pacific
Deal found 4/14$1,384
This Justfly.com deal was found by Cheapflights users on 4/13. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/119:35 pmBOS - SYD
2 stops31h 25mTurkish Airlines
Fri 5/238:55 pmSYD - BOS
2 stops36h 45mTurkish Airlines
Deal found 4/13$1,390
This Gurufare deal was found by Cheapflights users on 4/14. 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 6/86:12 pmBOS - SYD
1 stop22h 53mQantas Airways
Tue 6/179:10 amSYD - BOS
1 stop22h 06mQantas Airways
Deal found 4/14$1,449
This American Airlines deal was found by Cheapflights users on 4/14. 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.
Sun 6/82:54 pmBOS - SYD
2 stops25h 11mAmerican Airlines
Tue 6/175:45 pmSYD - BOS
1 stop26h 59mAmerican Airlines
Deal found 4/14$1,525
This JetBlue Airways deal was found by Cheapflights users on 4/14. 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 JetBlue Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2710:00 pmBOS - SYD
1 stop29h 10mJetBlue
Tue 9/28:45 pmSYD - BOS
1 stop32h 20mJetBlue
Deal found 4/14$1,547
This United Airlines deal was found by Cheapflights users on 4/14. 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.
Sun 6/89:35 amBOS - SYD
2 stops31h 25mUnited Airlines
Mon 6/1610:20 amSYD - BOS
1 stop20h 45mUnited Airlines
Deal found 4/14$1,554

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 April 15, 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

Thu 6/5

8:00 am-2:40 pm

1 stop40h 40m

Sydney Kingsford Smith

Wed 6/18

4:20 pm-6:00 am

1 stop27h 40m

$1,113

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 9/21

10:20 am-7:20 am

2 stops31h 00m

Sydney Kingsford Smith

Sat 10/4

10:20 am-9:35 am

2 stops37h 15m

$1,237

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 8/22

5:15 pm-8:45 am

2 stops25h 30m

Sydney Kingsford Smith

Mon 9/1

9:55 am-4:38 pm

2 stops44h 43m

$1,357

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 8/26

8:23 pm-7:45 pm

2 stops33h 22m

Sydney Kingsford Smith

Thu 9/11

9:40 pm-3:17 pm

1 stop31h 37m

$1,365

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 6/10

6:17 pm-11:45 am

2 stops27h 28m

Sydney Kingsford Smith

Tue 6/24

6:15 am-11:49 pm

2 stops31h 34m

$1,367

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 9/21

10:00 pm-6:15 am

1 stop42h 15m

Sydney Kingsford Smith

Sun 9/28

8:45 pm-3:05 pm

1 stop32h 20m

$1,376

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/4

1:40 am-10:50 am

1 stop43h 10m

Sydney Kingsford Smith

Mon 5/19

7:40 am-11:00 pm

1 stop29h 20m

$1,384

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/11

9:35 pm-7:00 pm

2 stops31h 25m

Sydney Kingsford Smith

Fri 5/23

8:55 pm-7:40 pm

2 stops36h 45m

$1,390

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 6/8

6:12 pm-7:05 am

1 stop22h 53m

Sydney Kingsford Smith

Tue 6/17

9:10 am-5:16 pm

1 stop22h 06m

$1,449

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/4

10:00 pm-5:10 pm

1 stop29h 10m

Sydney Kingsford Smith

Sun 5/11

8:45 pm-3:05 pm

1 stop32h 20m

$1,473

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 27 results
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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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Boston-Sydney flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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.

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 April 11, 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, February is the cheapest month in which you can book a flight from Boston to Sydney (average of $1,046). 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 April 15, 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 April 15, 2025.
Peruse reviews from past customers who have flown with Korean Air, Japan Airlines and Fiji Airways 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.

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
8.0
Very good

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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 $1,237. Other airlines that can offer you cheap pricing are Air New Zealand, from $1,357, and Alaska Airlines, from $1,365. You may be able to fly from Boston to Sydney for 16% 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 Fiji Airways ($655), Etihad Airways ($739), and Qatar Airways ($759).

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

  • 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 $39 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 $61 to make sightseeing during their layover a little easier.

  • Where are the least popular layover locations for 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 $1,046). 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.

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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$247Average$1,474FlexibilityNo cancel feeOn-time62%
Air CanadaCheapest$737Average$1,240FlexibilityNo cancel feeOn-time67%
Fiji AirwaysCheapest$751Average$1,482FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$824Average$1,451FlexibilityNo cancel feeOn-time69%
DeltaCheapest$872Average$1,356FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$931Average$1,518FlexibilityNo cancel feeOn-time71%
Qantas AirwaysCheapest$1,219Average$1,511FlexibilityNo cancel feeOn-time74%
Qatar AirwaysCheapest$1,272Average$1,804FlexibilityNo cancel feeOn-time68%
Air New ZealandCheapest$1,294Average$1,994FlexibilityNo cancel feeOn-time78%
Cathay PacificCheapest$1,300Average$1,494FlexibilityNo cancel feeOn-time72%

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