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$530+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SYD
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
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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 March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,050
(Mytrip)

One-way from

$530
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,292
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. 12% potential increase in price ($217 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($43 potential savings vs. average RT 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 March 25, 2025.

This Mytrip deal was found by Cheapflights users on 3/24. 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.
Tue 5/612:29 pmBOS - SYD
3 stops33h 16mMultiple Airlines
Thu 5/151:15 pmSYD - BOS
3 stops33h 26mMultiple Airlines
Deal found 3/24$1,050
This Air Canada deal was found by Cheapflights users on 3/24. 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.
Mon 9/2210:20 amBOS - SYD
2 stops31h 00mAir Canada
Mon 10/1310:20 amSYD - BOS
2 stops26h 50mAir Canada
Deal found 3/24$1,237
This oojo deal was found by Cheapflights users on 3/23. 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.
Tue 4/19:35 pmBOS - SYD
2 stops31h 25mTurkish Airlines
Tue 4/158:55 pmSYD - BOS
2 stops36h 45mTurkish Airlines
Deal found 3/23$1,359
This FlightHub deal was found by Cheapflights users on 3/24. 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.
Sun 11/99:15 pmBOS - SYD
1 stop29h 35mQatar Airways
Mon 11/179:40 pmSYD - BOS
1 stop32h 15mQatar Airways
Deal found 3/24$1,373
This Gurufare deal was found by Cheapflights users on 3/24. 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.
Wed 5/286:00 pmBOS - SYD
1 stop23h 05mQantas Airways
Mon 6/169:10 amSYD - BOS
1 stop22h 06mQantas Airways
Deal found 3/24$1,379
This StudentUniverse deal was found by Cheapflights users on 3/24. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:40 amBOS - SYD
1 stop28h 05mCathay Pacific
Thu 10/238:40 amSYD - BOS
1 stop29h 20mCathay Pacific
Deal found 3/24$1,423
This United Airlines deal was found by Cheapflights users on 3/23. 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.
Mon 5/125:00 pmBOS - SYD
1 stop23h 55mUnited Airlines
Sun 5/2510:20 amSYD - BOS
1 stop23h 33mUnited Airlines
Deal found 3/23$1,473
This JetBlue deal was found by Cheapflights users on 3/24. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/19:45 pmBOS - SYD
1 stop29h 25mJetBlue
Sun 6/18:45 pmSYD - BOS
1 stop32h 20mJetBlue
Deal found 3/24$1,475
This Alaska Airlines deal was found by Cheapflights users on 3/23. 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.
Sun 5/117:47 pmBOS - SYD
2 stops33h 58mAlaska Airlines
Sun 5/259:40 pmSYD - BOS
1 stop24h 00mAlaska Airlines
Deal found 3/23$1,484
This oojo deal was found by Cheapflights users on 3/23. 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.
Sat 4/54:02 pmBOS - SYD
2 stops29h 43mFiji Airways
Sat 4/126:00 amSYD - BOS
2 stops31h 49mFiji Airways
Deal found 3/23$1,487
This Gurufare deal was found by Cheapflights users on 3/23. 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.
Sat 5/38:33 amBOS - SYD
2 stops34h 12mAir New Zealand
Sat 5/176:20 pmSYD - BOS
2 stops51h 06mAir New Zealand
Deal found 3/23$1,491

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 March 25, 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 5/6

12:29 pm-11:45 am

3 stops33h 16m

Sydney Kingsford Smith

Thu 5/15

1:15 pm-8:41 am

3 stops33h 26m

$1,050

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/11

10:20 am-7:20 am

2 stops31h 00m

Sydney Kingsford Smith

Sun 5/25

9:20 am-9:35 am

2 stops38h 15m

$1,242

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Tue 4/1

9:35 pm-8:00 pm

2 stops31h 25m

Sydney Kingsford Smith

Tue 4/15

8:55 pm-7:40 pm

2 stops36h 45m

$1,359

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Wed 5/28

6:00 pm-7:05 am

1 stop23h 05m

Sydney Kingsford Smith

Mon 6/16

9:10 am-5:16 pm

1 stop22h 06m

$1,379

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Mon 5/12

5:00 pm-6:55 am

1 stop23h 55m

Sydney Kingsford Smith

Sun 5/25

10:20 am-7:53 pm

1 stop23h 33m

$1,473

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Thu 5/1

9:45 pm-5:10 pm

1 stop29h 25m

Sydney Kingsford Smith

Mon 6/2

8:45 pm-3:05 pm

1 stop32h 20m

$1,475

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sun 5/11

7:47 pm-7:45 pm

2 stops33h 58m

Sydney Kingsford Smith

Sun 5/25

9:40 pm-7:40 am

1 stop24h 00m

$1,484

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 4/5

4:02 pm-11:45 am

2 stops29h 43m

Sydney Kingsford Smith

Sat 4/12

6:00 am-11:49 pm

2 stops31h 49m

$1,487

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Sat 5/3

8:33 am-8:45 am

2 stops34h 12m

Sydney Kingsford Smith

Sat 5/17

6:20 pm-7:26 am

2 stops51h 06m

$1,491

BostonSydney

BOS - SYD

BOSSYD

Boston Logan Intl

Fri 4/4

1:40 am-9:40 am

1 stop41h 00m

Sydney Kingsford Smith

Wed 4/23

7:40 am-11:00 pm

1 stop29h 20m

$1,506

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 25 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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust 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.

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 March 21, 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 $1,044). 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 March 25, 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 March 25, 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.
Korean Air
8.4
Very good
1,047 reviews

Overall

8.4

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

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.
Korean Air
8.4
Very good
1,047 reviews
Korean Air
8.4
Very good
1,047 reviews

Overall

8.4

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

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.
Japan Airlines
8.3
Very good
1,440 reviews
Korean Air
8.4
Very good
1,047 reviews

Overall

8.4

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

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.
Fiji Airways
8.0
Very good
182 reviews
Korean Air
8.4
Very good
1,047 reviews

Overall

8.4

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

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.
Delta
8.0
Very good
7,890 reviews
Korean Air
8.4
Very good
1,047 reviews

Overall

8.4

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

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.
Alaska Airlines
8.0
Very good
9,785 reviews
Korean Air
8.4
Very good
1,047 reviews

Overall

8.4

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Food

8.1

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 $1,242. Other airlines that can offer you cheap pricing are Turkish Airlines, from $1,359, and Qantas Airways, from $1,379. 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 ($697), and Alaska Airlines ($824).

  • 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 $38 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 $52 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 $1,044). 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
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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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$247Average$1,437FlexibilityNo cancel feeOn-time62%
Air CanadaCheapest$735Average$1,227FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$824Average$1,457FlexibilityNo cancel feeOn-time69%
DeltaCheapest$872Average$1,367FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$930Average$1,512FlexibilityNo cancel feeOn-time71%
Cathay PacificCheapest$1,195Average$1,489FlexibilityNo cancel feeOn-time72%
Qantas AirwaysCheapest$1,217Average$1,535FlexibilityNo cancel feeOn-time74%
Qatar AirwaysCheapest$1,295Average$2,154FlexibilityNo cancel feeOn-time68%
Air New ZealandCheapest$1,471Average$1,664FlexibilityNo cancel feeOn-time78%
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