BOS - SYD

$795 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 11/2. 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

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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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

Sat, 1 Nov - Sat, 15 Nov
Qantas Airways Logo
12:00 - 09:00BOS-SYD
30h 00m1 stop
Qantas Airways Logo
17:45 - 06:18SYD-BOS
28h 33m1 stop
$1,844Qantas Airways
Find Deal
Fri, 14 Nov - Mon, 8 Dec
Qantas Airways Logo
17:45 - 09:00BOS-SYD
23h 15m1 stop
Qantas Airways Logo
17:45 - 07:14SYD-BOS
29h 29m1 stop
$1,845Qantas Airways
Find Deal
Mon, 1 Dec - Mon, 22 Dec
American Airlines Logo
12:00 - 09:00BOS-SYD
29h 00m1 stop
American Airlines Logo
11:20 - 19:19SYD-BOS
23h 59m2 stops
$1,850American Airlines
Find Deal
Wed, 12 Nov - Thu, 27 Nov
American Airlines Logo
14:49 - 09:00BOS-SYD
26h 11m2 stops
American Airlines Logo
11:20 - 20:38SYD-BOS
25h 18m2 stops
$1,858American Airlines
Find Deal
Tue, 28 Oct - Sat, 15 Nov
Air Canada Logo
10:45 - 08:40BOS-SYD
30h 55m2 stops
Air Canada Logo
11:20 - 21:27SYD-BOS
26h 07m2 stops
$1,859Air Canada
Find Deal
Sat, 28 Feb - Tue, 31 Mar
Air Canada Logo
05:30 - 09:35BOS-SYD
36h 05m3 stops
Air Canada Logo
10:20 - 21:27SYD-BOS
26h 07m2 stops
$1,867Air Canada
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Fri, 14 Nov - Fri, 5 Dec
United Airlines Logo
18:10 - 09:05BOS-SYD
22h 55m1 stop
United Airlines Logo
14:00 - 19:24SYD-BOS
21h 24m1 stop
$1,895United Airlines
Find Deal
Thu, 29 Jan - Sun, 15 Feb
United Airlines Logo
11:42 - 07:00BOS-SYD
27h 18m1 stop
United Airlines Logo
12:10 - 21:44SYD-BOS
25h 34m1 stop
$1,896United Airlines
Find Deal
Tue, 28 Oct - Wed, 5 Nov
Multiple Airlines Logo
17:49 - 09:00BOS-SYD
24h 11m1 stop
Multiple Airlines Logo
11:20 - 09:32SYD-BOS
38h 12m2 stops
$1,909Multiple Airlines
Find Deal
Sun, 22 Feb - Thu, 5 Mar
Multiple Airlines Logo
18:00 - 09:00BOS-SYD
23h 00m1 stop
Multiple Airlines Logo
11:20 - 21:27SYD-BOS
26h 07m2 stops
$1,913Multiple Airlines
Find Deal

Everything you should know

Top airlines
Qantas Airways
Cheapest • from $1,844 (return)
Qantas Airways
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 6% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 13% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
$1,844
Overall average: $2,213
Qantas Airways
Sat 1/11Sat 15/11
BOS - SYD • 1 stop
Cheapest one-way flight
$795
Typical prices: $1,038-$1,487
Air Canada
Wed 11/2
BOS - SYD • 2 stops
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Sydney!
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’s the cheapest day of the week to fly from Boston to Sydney?

The average price of all round-trip flights from Boston to Sydney clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Sydney on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from Boston to Sydney. For your return ticket, we recommend flying on a Sunday and avoiding Saturdays for the best deals.

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 $1,909 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $2,874 and $2,484 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 6% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Low seasonJune
Cheapest flight$795
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly (30% 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 $515 for a one-way ticket and $1,195 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?

    oneworld, and Star Alliance are the airline alliances operating flights between Boston and Sydney, with oneworld 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 $3,561 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 $1,917 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 921 reviews
7.0Food
8.2Crew
7.7Boarding
7.5Comfort
7.2Entertainment
Airline reviews

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

2.0 MediocreR, Oct 2025WLG - BNE
Read more Qantas Airways reviews

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 !

The wifi was out. Otherwise it was great flight. Richard, as CSM, was excellent.

Was bumped to a later flight because of inefficiency on part of the airline.

The Emerits/Qantas flight was cancelled to Wellington. We need a refund. Had to buy another airline ticket. How do we get the refund. Still not in Wellington.

Delayed QF59 flight once again, Qantas doesn't fail in maintaining there delayed departures and arrivals. USB points do not work nor do the power point sockets on the plane, Qantas staff admitted that on the flight. Don't expect to your charge devices. Saving grace, was the ice cream. Bottom line, if you expect to fly to HND and make it on time avoid Qantas and if you're interested in ice cream - visit 7/11.

My husband and I recently had an unfortunate experience with Lufthansa. At the Philadelphia International airport, the ground staff refused to board us because we didn’t have a current visa stamped on our passports for Frankfurt. We completely understand that this was our mistake. we should have double-checked the visa requirements before our trip. However, the issue that upset us most was how the situation was handled by the staff. They told us they would mark it as “boarding denied due to visa issue”, but instead they recorded it as “no show”. Because of that incorrect entry, our return flight was automatically cancelled as well, which caused additional stress and expense. Mistakes can happen, but we expected more transparency and accuracy from a reputed airline like Lufthansa. It would have made a big difference if the staff had been more careful and considerate in documenting the situation correctly.

Flight was good but there are way to many announcements for credit cards etc.

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Flight was timely, relatively comfortable, with decent entertainment and food served. Only problem encountered was with the free messaging which I highly appreciate, but it did not work from iphone to non-iphones.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

The worst landing I have ever had on a domestic flight. Thought we would lose the landing gear on landing in Newark. Then we spent 40 minutes trying to position the plane in the right place to be able to get the jet way to the plane. The plane arrived stopped. The announcer was that we were there. Everybody got up, then we were told to sit back down because they had to have us towed to a different position. We got towed and then everyone stood up and they told us we were in the wrong position to sit back down again, and then we got towed to a different position This did not happen immediately. It was 30 minutes while we wandered around a small section of the tarmac in Newark close to the gate, but apparently not close enough. Horrifying experience The CAB should be investigating that flight

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

Boarding was organized. Old plane. Seat fairly comfortable. Business Class much too large so you don’t receive as much attention as you should considering what you pay for the seat.

Plane left an hour late, I missed my connection and my bow case was never even loaded on the plane in VA. I deal with this type of nonsense everytime I fly air canada.

For goodness sake, board from the back of the plane to the front and assign overhead space. It would fix everything. Seriously.

Elderly female flight attendant was not customer friendly. There were only about 12 people on a regional jet that had about 60 seats. There were 8 exit row seats and none of them were taken. We attempted to sit in those seats and the flight attendant gave the standard " you didn't pay for those" so she would not allow us to move. What harm would that have caused ? They assigned seats to 5 of the 12 people in 2 rows, row 20 and 21. A simple friendly customer experience gesture of allowing us to sit in exit rows would have gone a long way in me having a very favorable impression on Air Canada. After that I have very poor impression of Air Canada and will not fly with them when I can avoid it.

It was a smooth flight both in the sky and landing!

Pearson Airport could not properly handle all the passengers who they needed to process in order to properly get them on board. As a result, I missed the departure of my flight from Toronto. The only saving grace is that Air Canada found a flight that only delayed me by one hour. However, this was no thanks to Pearson Airport!

Almost everything it was a “cool” ambiance but we arrived to Toronto so that it’s ok for me

The crew was really nice. The plane seats were kinda small even for a 5’6” / 158 lbs person.

Fare was great, seat comfort the opposite as cushion was worn out. Ok for 2 hour flight, not for 4.5 hour flight..

Check in agent was very helpful and polite. He helped me board the earlier flight back home instead of waiting 2 hours at the airport for the next flight

Fair. What's the point of partnering with United if we cannot use the lounge. My wife is a frequent flier with United but we were refused access to Air Canada lounge

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

Information on your arrival and departure airports

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