BOS - SYD

$809 Find Cheap Flights from Boston to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Sydney departing on 3/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Sydney, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Sydney, as well as popular online travel agencies
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Everything you should know

Cheapest return fare
$1,708
Typical prices: $1,838-$2,391
United Airlines
Wed 12/8Mon 24/8
BOS - SYD • 1 stop
Cheapest one-way flight
$809
Typical prices: $1,096-$1,757
Multiple Airlines
Sat 3/10
BOS - SYD • 3 stops
Top airlines
Cheapest • from $1,708 (return)
Best reviews • 7.5 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Direct flights
Not available
There are currently no direct flights between Boston and Sydney. You’ll need at least 1 connection.
Insights
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Top stopover airports
Cheapest • Avg $1,761 (return)
Shortest trip • 23h 23m (one-way)
Insights
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When to book
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 7% compared to booking last minute.
Insights
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Insights
When to travel
Cheapest • 17% price drop
Most popular
Good to know
Good to know
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KAYAK searches hundreds of sites at once to find you the best travel deals.
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boston to Sydney (BOS-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Boston to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Boston to Sydney

Wed, 12 Aug - Mon, 24 Aug
United Airlines Logo
14:00 - 06:55
BOS
-
SYD
26h 55m
1 stop
United Airlines Logo
10:20 - 17:07
SYD
-
BOS
20h 47m
1 stop
$1,708United Airlines
Mon, 27 Jul - Mon, 10 Aug
Delta Logo
20:30 - 06:50
BOS
-
SYD
44h 20m
1 stop
Delta Logo
09:15 - 19:25
SYD
-
BOS
24h 10m
1 stop
$1,711Delta
Wed, 12 Aug - Mon, 24 Aug
American Airlines Logo
10:30 - 07:30
BOS
-
SYD
31h 00m
1 stop
American Airlines Logo
09:10 - 23:44
SYD
-
BOS
28h 34m
1 stop
$1,715American Airlines
Wed, 12 Aug - Mon, 24 Aug
United Airlines Logo
11:54 - 07:00
BOS
-
SYD
29h 06m
1 stop
United Airlines Logo
09:30 - 21:02
SYD
-
BOS
25h 32m
2 stops
$1,719United Airlines
Wed, 12 Aug - Mon, 24 Aug
American Airlines Logo
15:53 - 07:30
BOS
-
SYD
25h 37m
2 stops
American Airlines Logo
09:10 - 19:42
SYD
-
BOS
24h 32m
2 stops
$1,721American Airlines
Mon, 3 Aug - Sun, 16 Aug
United Airlines Logo
06:21 - 07:00
BOS
-
SYD
34h 39m
1 stop
United Airlines Logo
09:30 - 21:59
SYD
-
BOS
26h 29m
2 stops
$1,737United Airlines
Mon, 24 Aug - Mon, 7 Sep
Qantas Airways Logo
07:00 - 07:30
BOS
-
SYD
34h 30m
1 stop
Qantas Airways Logo
09:10 - 07:36
SYD
-
BOS
36h 26m
1 stop
$1,741Qantas Airways
Sat, 15 Aug - Sun, 30 Aug
United Airlines Logo
17:01 - 06:55
BOS
-
SYD
47h 54m
2 stops
United Airlines Logo
09:30 - 21:59
SYD
-
BOS
26h 29m
2 stops
$1,744United Airlines
Sat, 15 Aug - Sun, 30 Aug
United Airlines Logo
17:01 - 06:55
BOS
-
SYD
47h 54m
2 stops
United Airlines Logo
09:30 - 17:20
SYD
-
BOS
21h 50m
1 stop
$1,745United Airlines
Sat, 15 Aug - Sun, 30 Aug
United Airlines Logo
17:01 - 06:55
BOS
-
SYD
47h 54m
2 stops
United Airlines Logo
09:30 - 17:20
SYD
-
BOS
21h 50m
1 stop
$1,747United Airlines
Booking Insights

KAYAK's insights & trends for Boston to Sydney flights

Get data-powered insights and trends into flights from Boston to Sydney to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from Boston to Sydney?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Boston to Sydney departing in August.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Sydney, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to Sydney is September, where tickets cost $1,769 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $3,033 and $2,241 respectively.

How far in advance should I book a flight from Boston to Sydney?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to Sydney, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boston to Sydney, you should book around 4 weeks before departure, which saves you about 7% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonMay
Cheapest flight$809
Best time to beat the crowds (8% less expensive on average)
Most popular time to fly (42% more expensive on average)
Flight from Boston to Sydney

When to book flights from Boston to Sydney

Are your dates flexible? Find out the best times to travel from Boston to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Boston to Sydney

  • Does Sydney Kingsford Smith Airport have an onsite hotel?

    Yes, Sydney Kingsford Smith Airport has three hotels within its precinct offering exceptionally stylish and premium accommodation. Located at the international terminal, Rydges Hotel offers travelers complimentary shuttle service to and from all terminals. The other two hotels at the airport are the ibis budget Sydney Airport and the Mantra Sydney Airport. Both are located just five minutes away from Terminals 2 and 3.

  • Is Sydney Kingsford Smith Airport linked to the city via a train line?

    Yes, Sydney Kingsford Smith Airport is linked to the city by a line plying the route every ten minutes. The train service, called the Airport Link, is the best way to get to the town from the airport. Airport Link operates two train stations at the airport, one is situated beneath the Domestic Passenger Terminals, while the other is found below the International Passenger Terminal (T1).

  • What are layover options between Boston Logan International Airport and Sydney Kingsford Smith Airport?

    Your layover options will be determined mainly by the airline you are using. If you opt for a relatively quick one-stop flight offered by United Airlines, Virgin Australia, American Airlines, or Qantas Airways, your layover will be in San Francisco, Los Angeles, or Dallas.

  • Does Boston Logan International Airport have a kid's play area?

    Yes, Boston Logan International Airport features a kid's port at Terminal C equipped with vintage-style aircraft replicas, an airfield carpet, and cloud-painted walls. The airport also has another kids' playing area located at Terminal B near Gate B30.

  • What is the cheapest flight from Boston to Sydney?

    In the last 3 days, the lowest price for a flight from Boston to Sydney was $809 for a one-way ticket and $1,708 for a return.

  • Which airports will I be using when flying from Boston to Sydney?

    When flying out of Boston you will be using Boston Logan Intl. You will be landing at Sydney, also known as Sydney Kingsford Smith.

  • Which aircraft models fly most regularly from Boston to Sydney?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Boston to Sydney?

    Star Alliance, and oneworld are the airline alliances operating flights between Boston and Sydney, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Boston to Sydney, Qantas Airways or United Airlines?

    The two airlines most popular with KAYAK users for flights from Boston to Sydney are Qantas Airways and United Airlines. With an average price for the route of $2,815 and an overall rating of 7.5, Qantas Airways is the most popular choice. United Airlines is also a great choice for the route, with an average price of $2,080 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Boston to Sydney?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Sydney.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Sydney?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Sydney?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Sydney with an airline and back to Boston with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Sydney?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Boston to Sydney

  • If you are looking to travel directly from Boston Logan International Airport to Sydney Kingsford Smith Airport, you will have to opt for a one-stop flight. This is because, currently, no airlines offer direct flights on the route. United Airlines, Virgin Australia, American Airlines, and Qantas Airways are among the major airlines that offer quick one-stop flights between the two airports.
  • Boston Logan International Airport (BOS) has lactation bays for traveling mothers before and after security check-in at Terminal A. The lactation bays feature folding seats, changing tables, and a sink to ensure maximum comfortability. The airport also has Mamava pods at Terminal B near Gate C8 and on Terminal E's departure level near Gate E9.
  • Aside from being the busiest airport in Australia, Sydney Kingsford Smith Airport (SYD) is the only airport serving greater Sydney. It connects the city to 46 domestic destinations such as Brisbane, Canberra, Hobart, and Auckland. It is the primary hub for Qantas Airlines and a secondary hub for Virgin Australia.
  • If you arrive at Sydney Kingsford Smith Airport early and have time to spare, you can visit the observation deck located at Terminal 1. The deck is fitted with telescopes for observing planes land and take off and general happenings at the airport. The airport also has a plane spotter mound next to the control tower called the Shep's Mound. The bank has two raised platforms overlooking the airfield, expansive grassed areas, and dedicated car parking.
  • Suppose you require special luggage services at Sydney Kingsford Smith Airport. In that case, you are lucky as the airport has a luggage storage facility operated by Smarte Carte, located in Terminal 1, and open from 6:00 am to 9:30 pm.

Reviews of the top airlines flying from Boston to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Boston to Sydney. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Sydney? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
Qantas AirwaysOverall score based on 1050 reviews
8.1Crew
7.2Entertainment
7.0Food
7.5Comfort
7.7Boarding
Airline reviews

PREMIUM ECONOMY - excellent !Brilliant new plane. Excellent tv catalogue. Good food. Good communication and service from all friend Australian crew. Good communication from captain. Best travel experience in years.

10.0 ExcellentAnonymous, Apr 2026
SFO - SYD
Read more Qantas Airways reviews

PREMIUM ECONOMY - excellent !Brilliant new plane. Excellent tv catalogue. Good food. Good communication and service from all friend Australian crew. Good communication from captain. Best travel experience in years.

I couldn't hear all of the announcements. It was nice when they put them on the screen.

Loved the staff. The economy seats could have been bigger.

The food was terrible. And the flight attendants were very rude. One flight attendant wouldn’t help a passenger lift their carry-on. Another flight attendant wouldn’t give a man an extra blanket. And they walked by not even looking at the passengers to see if they needed a glass of water.

Delayed and missed connection, was not re-booked like other travelers so ended up being stuck for several hours due to no one handling my booking.

same as previous comments. i hate being on a plane that long. no problems w/anything else.

Much better than I expected for such a long flight.

Good - better than other airlines in terms of food and seat comfort.

Experience was great. My only advice is to have a pasta dish on the menu. Otherwise everything was excellent.

Flight LA to Sydney was first moved earlier by 2 hrs from 10:25 pm to 8:25pm roughly a week before departure. Then on actual departure date, it was delayed 2x, and needed up leaving close to 10 pm. Then entertainment for the whole flight wasn’t working for most of the seats including ours. The baby crib at the middle isle was being taped to the wall to keep it tacked in using a packing tape while passengers were walking by looking for their seats. Not projecting good confidence. After a few minutes after take off the whole crib fell off. Good the people seating next to it wast hit or got scared. At arrival at Sydney, crew handed the customs forms as we were getting out of the plane. So passengers had to scramble to find a place to fill up the forms along the corridor going to immigration. So no one is available to help from Qantas to fill up the entry forms. Not a very good experience for a flagship carrier.

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

Terrible. Our first time back on United for 10 years, the seats in Polaris class are small and uncomfortable. They have squished too many people in to get more $$$. The staff are not friendly and not wanting to accommodate. I asked for two salads rather than a main meal and was advised no we wont do that. Then asked what I would like for breakfast and given something else anyway. I will not be flying United International anytime soon.

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

Smooth flight. As always dinner could have been more generous. Breakfast was great.

Moody attendants that can barely look up at the passengers. I’m all for people having an off day, but you can tell some Untied Airlines Employees have lost their zeal for their jobs

Great checkin experience and flight crew were very friendly and helpful

Staff did not care, and very clearly did not want to be serving passengers. Requests were ignored repeatedly. Toilets filthy. Bins were just trash bags hung around the place that were never emptied. It was a challenge to even get a glass of water on a 14 hour flight.

Got automatically assigned a middle seat, unless I fork out extra money for seat assigment.

Flight was diverted to Canberra because Not enough fuel to circle on Sydney’s skies waiting for showers to pass. After that everything went wrong. It took forever to put fuel. Once back rolling, we stopped short of takeoff because crew had reached maximum work hours per shift. Back to gate we waited and waited in the plane with no water and no food - a total of 4 hours. Received contrasting news about the follow up of our trip. Finally we disembarked but our luggage could not be processed there as not enough custom agents. We ended up on buses and arrived at Sydney airports after a 3 hours trip. There we had to queue in line with 240 more passengers to file a lost luggage claim. We received the luggage after 48 hours, many of which spent holding with non-existent United customer service. Never able to speak to an actual person during those long phone calls. Finally on a chatline I could talk to a baggage agent, who filed another report as our luggage did not appear anywhere in their system. Thus it was surprising to get it back.

Everything you need to know for your flight from Boston to Sydney

Information on your arrival and departure airports