BOS - SYD

$776 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 22/2. 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
$1,398
Overall average: $2,211
Qantas Airways
Sun 1/2Sun 8/2
BOS - SYD • 1 stop
Cheapest one-way flight
$776
Typical prices: $1,092-$1,441
Air Canada
Sun 22/2
BOS - SYD • 2 stops
When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 3% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 16% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Sun, 1 Feb - Sun, 8 Feb
Qantas Airways Logo
17:20 - 09:00
BOS
-
SYD
23h 40m1 stop
Qantas Airways Logo
07:05 - 17:56
SYD
-
BOS
26h 51m2 stops
$1,398Qantas Airways
Tue, 3 Feb - Tue, 10 Feb
Qantas Airways Logo
11:00 - 09:00
BOS
-
SYD
30h 00m1 stop
Qantas Airways Logo
07:05 - 17:56
SYD
-
BOS
26h 51m2 stops
$1,402Qantas Airways
Mon, 2 Feb - Mon, 9 Feb
Multiple Airlines Logo
06:00 - 12:35
BOS
-
SYD
38h 35m2 stops
Multiple Airlines Logo
14:00 - 05:00
SYD
-
BOS
31h 00m2 stops
$1,423Multiple Airlines
Wed, 18 Feb - Wed, 25 Feb
Qantas Airways Logo
16:50 - 09:00
BOS
-
SYD
24h 10m1 stop
Qantas Airways Logo
07:05 - 18:40
SYD
-
BOS
27h 35m2 stops
$1,425Qantas Airways
Mon, 26 Jan - Sat, 7 Feb
Qantas Airways Logo
17:20 - 09:00
BOS
-
SYD
23h 40m1 stop
Qantas Airways Logo
19:15 - 17:56
SYD
-
BOS
38h 41m2 stops
$1,431Qantas Airways
Tue, 24 Feb - Tue, 17 Mar
Qantas Airways Logo
16:50 - 07:35
BOS
-
SYD
46h 45m2 stops
Qantas Airways Logo
11:20 - 22:59
SYD
-
BOS
26h 39m1 stop
$1,432Qantas Airways
Sat, 28 Feb - Sun, 26 Apr
Qantas Airways Logo
16:50 - 20:50
BOS
-
SYD
36h 00m2 stops
Qantas Airways Logo
09:10 - 08:04
SYD
-
BOS
36h 54m1 stop
$1,435Qantas Airways
Sun, 1 Feb - Mon, 16 Feb
Qantas Airways Logo
11:00 - 07:35
BOS
-
SYD
52h 35m2 stops
Qantas Airways Logo
17:45 - 06:14
SYD
-
BOS
28h 29m1 stop
$1,463Qantas Airways
Sun, 1 Feb - Mon, 16 Feb
Qantas Airways Logo
11:00 - 07:35
BOS
-
SYD
52h 35m2 stops
Qantas Airways Logo
17:45 - 06:14
SYD
-
BOS
28h 29m1 stop
$1,466Qantas Airways
Fri, 6 Feb - Fri, 20 Feb
Qantas Airways Logo
17:20 - 09:00
BOS
-
SYD
23h 40m1 stop
Qantas Airways Logo
07:05 - 18:40
SYD
-
BOS
27h 35m2 stops
$1,469Qantas Airways
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.

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 March, where tickets cost $1,784 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $2,867 and $2,216 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 2 weeks before departure, which saves you about 3% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonJune
Cheapest flight$776
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly and prices are also 9% lower 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 $776 for a one-way ticket and $1,398 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 $2,972 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 $1,850 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 3 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 962 reviews
8.2Crew
7.5Comfort
7.0Food
7.2Entertainment
7.7Boarding
Airline reviews

Flight was canceled. I was not alerted. It was only kayak that alerted me

2.0 MediocreGerard, Nov 2025
CBR - BNE
Read more Qantas Airways reviews

Flight was canceled. I was not alerted. It was only kayak that alerted me

Flight was 2.5 hours late leaving. We spent 50 minutes of that sitting on the plane with no explanation. They did reduce the time in the air so we arrived a little less late which was something. The cheese and crackers were okay but the wine was terrible.

Couldn't access entertainment on app as said in an email

Excellent as always, I won't fly to Australia, and back to the US on any other airline. The flight crew is always top notch, and have a way to make one feel extra special. Thank you for your service, I would rate Qantas Airways a 10+.

After already paying for excess luggage prior to flight, i was advised AT check in that i had to pay $816 or forfeit my flight! The lady at the counter was SO rude and had already started offboarding me when i said i would pay it after asking her three times for the exact amount! Have lodged a formal complaint yet heard nothing. Will not ever travel via Qantas again

A few more inches of legroom is all i ask

One of the best Qantas business flights I've had. Quality product

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

Airline running better than post Covid, proper boarding process now implemented, some aircraft feeling a bit old and tired, crew fine, online experience better.

Five hour flight instead of four hours due to westerly headwinds which wasn’t the fault of Qantas !

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

Aircraft was noisy, old and never dimmed the lights on a night flight even on business class! I flew 17 times on United and probably another 40 on other airlines United USA /Europe flights were the worst to include luggage delayed once going to europe and once coming back

Check how old the airframe is, some older ones have inoperable seat back entertainment or power.

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Kayak was among the missing. There was not the usual advice regarding next gate after arriving in Dallas. No communication after the reminder to check in before the Moline flight. What happened?

They should have allowed for extra time to de-ice the plane before boarding passengers. This delayed us about 10-15 mins after we boarded. Overall experience was fine. Crew was friendly and on top of everything. We didn’t have any issues during the flight.

Experience was good. We were delayed in leaving by 15 mins because the flight was waiting on a family that was late in getting to the gate. Food and drink options were as expected. I highly recommend checking in ahead of time using the airline’s app so that it’s quicker to get your luggage tags as soon as you arrive at the terminal. No more waiting in long lines!

Overall experience was great. Flights were almost on time in departing and we arrived at our destination as scheduled. No issues with amenities or flight crew. Everything went well as as expected. Will fly again with American Airlines in the future!

We never made it due to delays on both ends. Gate attendant said it was mechanical but the system said otherwise, so no compensation. That’s not right.

Our flight from Eagle to Vail was delayed to the point we missed our connection to Savannah. Now we’re a family of 4 in a hotel room with luggage, no toiletries, no clean clothes. Gate attendant said the delay was mechanical but it was put in the system as something else so no compensation. That’s just wrong.

Crew were all friendly and helpful. It was a short flight so just a beverage service with a cookie. After we were boarded the plane took about 45 minutes to leave the gate but it was New Year’s Eve so not shocking there was some delay. Overall good experience and very grateful.

After the door had been closed, the cockpit makes an announcement that catering is running late and it is not the airline's fault. It is their fault in the sense that we had to sit for 2 hours or more when we could have stayed in the terminal. Poor communications between catering and airline. This caused a young man to lose his temper and he went storming out hitting objects. He had complained to the gate agent that he had already waited at the gate 7 hours and when can the airplane leave? Airilnes do a poor job of explaining delays, maintenance issues, etc. whereas being truthful may gain more sympathy or understanding.

The flight was very smooth and the meal in business class was great.

The captain brought my 6 year old son into the cockpit and allowed him to ask questions, sit in the captain’s chair and talk about all the gears and levers. Made the trip very special for him.

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

Information on your arrival and departure airports