$832 Cheap United flights from Boston to Sydney (BOS to SYD)

Find The Best Day To Fly from Boston to Sydney

Amazing United BOS to SYD Flight Deals

The cheapest flights to Kingsford Smith Intl. found within the past 7 days were $1,292 round trip and $832 one way. Prices and availability subject to change. Additional terms may apply.

Mon, Dec 1 - Sun, Dec 21
BOS
Boston
SYD
Sydney
$1,292 Roundtrip, found 23 hours ago
$1,292
Roundtrip
found 23 hours ago
Select United flight, departing Mon, Dec 1 from Boston to Sydney, returning Sun, Dec 21, priced at $1,292 found 23 hours ago
Mon, Dec 1 - Sun, Dec 21
BOS
Boston
SYD
Sydney
$1,297 Roundtrip, found 23 hours ago
$1,297
Roundtrip
found 23 hours ago
Select United flight, departing Mon, Dec 1 from Boston to Sydney, returning Sun, Dec 21, priced at $1,297 found 23 hours ago

SYD From BOS Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
YEHS Hotel Sydney Harbour Suites

YEHS Hotel Sydney Harbour Suites

4 out of 5
Price was $2,528, price is now $2,049 per person
$2,049
per person
Nov 9 - Nov 14
found 22 hours ago
Roundtrip non-stop flight included
Boston (BOS) to Sydney (SYD)
InterContinental Sydney Double Bay by IHG

InterContinental Sydney Double Bay by IHG

5 out of 5
Price was $3,178, price is now $2,620 per person
$2,620
per person
Dec 27 - Dec 30
found 20 hours ago
Roundtrip flight included
Boston (BOS) to Sydney (SYD)
Ovolo Woolloomooloo

Ovolo Woolloomooloo

5 out of 5
Price was $2,509, price is now $2,122 per person
$2,122
per person
Nov 9 - Nov 14
found 22 hours ago
Roundtrip non-stop flight included
Boston (BOS) to Sydney (SYD)
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Frequently asked questions

Can I catch a flight from Logan Intl. Airport to Mascot Airport right now?
For information on any present SYD travel advice and quarantine requirements, visit our Covid-19 Travel Advisor. Check before you arrange your flight, so you don't get caught up en route.
What terminal is United Airlines at Logan Intl. Airport (BOS)?
Check your boarding pass to find out which Logan Intl. Airport (BOS) terminal you'll be taking off from on your way to Kingsford Smith Intl. Airport (SYD) with United Airlines. If you can't spot the information on there, contact your airline.
Are there United Airlines non-stop flights from BOS to SYD?
United Airlines doesn't fly direct between BOS and Mascot Airport, so get ready to make at least one stopover. If you have time to spare between flights, check out the airport shops while you wait for your connection.
How long is a United Airlines flight from BOS to SYD?
Your United Airlines flight from BOS to SYD should take roughly 22 hours and 10 minutes, so pack a spare set of clothes and some toiletries for the journey. If you want to keep restlessness and boredom at bay, toss some travel games and books in your cabin bag too.
How many direct and indirect flights does United Airlines fly from BOS to SYD?
In each week, you'll find roughly 7 United Airlines flights operating between BOS and Mascot Airport.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Mascot Airport, please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Boston BOS to Sydney SYD 

To find the best deals on flights to Boston from Sydney with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Boston BOS to Sydney SYD with United 

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $1,292 to $1,297, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way United flights from Boston BOS to Sydney SYD 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Boston to Sydney costs from $832. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to Sydney SYD from  Boston BOS with United 

To find a cheap United flight from Boston BOS to Sydney SYD, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on United flights from Boston BOS to Sydney SYD 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as December, or if you book a flight with a stopover. 

 

Find nonstop flights from Boston BOS to Sydney SYD with United 

If you’re keen to be on Sydney soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from Boston BOS to Sydney SYD 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to Sydney SYD from  Boston BOS with United on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

Travelers ❤️ these 🏨 after their flight to Sydney

Rydges Sydney Airport Hotel

Rydges Sydney Airport Hotel

4 out of 5
8 Arrival Court, Sydney International Airport, Mascot, NSW
This smoke-free hotel's 2 restaurants, 2 bars/lounges, and 24-hour gym are some of the featured amenities. Traveling on business? Take advantage of the 24-hour ...
8.6/10 Excellent! (2,928 reviews)
"Overall a really good Esperance … ver nice"

Reviewed on Oct 10, 2025

Rydges Sydney Airport Hotel
Novotel Sydney International Airport Hotel

Novotel Sydney International Airport Hotel

4 out of 5
22 Levey Street, Wolli Creek, NSW
This hotel features a restaurant, an outdoor pool, and a bar/lounge. Traveling on business? Take advantage of the business center, free WiFi in public areas, ...
8.4/10 Very Good! (1,004 reviews)
"We walked to the international airport and it was really easy, 12 min walk, I stay because it's close to the airport either domestic or international, and it's convenient because of the location and it's a nice quiet and great stay."

Reviewed on Oct 1, 2025

Novotel Sydney International Airport Hotel
Holiday Inn Express Sydney Airport by IHG

Holiday Inn Express Sydney Airport by IHG

3.5 out of 5
2-12 Sarah Street, Mascot, NSW
A restaurant and a bar/lounge are featured at this hotel. Traveling on business? Take advantage of the business center, free WiFi in public areas, and airport ...
8.6/10 Excellent! (1,520 reviews)
"Had a very nice stay and shuttle was great"

Reviewed on Oct 11, 2025

Holiday Inn Express Sydney Airport by IHG
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

Explore More Ways to Travel with Travelocity

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.