Cheap flights from Boston to Sydney
Cheap return flights from Boston to Sydney
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
Sydney flight facts
What you need to know
What are the cheapest airlines?
- Qantas
- United Airlines
- American Airlines
These airlines usually offer the cheapest flights from Boston to Sydney.
What airlines fly indirectly?
- Delta Airlines
- Air New Zealand
- Singapore Airlines
These airlines fly from Boston to Sydney, but you’ll have at least one layover.
How long is the flight?
22 hours
This is the shortest flight time from Boston to Sydney.
Alternative flights from the UK to Sydney
Check out prices for other routes
Alternative flights from Boston
You might find cheaper flights nearby
Today alone, Netflights has searched over five flights. 05 / Feb / 2026 is currently the lowest priced day of the year to fly the Boston/Sydney route. There are around 35 flights on any given week from the UK to Sydney and the cheapest month to fly right now is February. Not suitable? Try running another search or viewing all cheap flight deals.
How to get cheap flights from Boston to Sydney
Tips and advice from our flight experts
You've searched for flights from Boston to Sydney. We've found 15 flights and compared them to give you the best offer. Qantas is, on average, the cheapest for this route. Look out for their deals! The cheapest offer we've found is a one-way ticket for £75 from Boston to Sydney on 26/05/2026 at 16:55.
We've scanned hundreds of airfares from dozens of airlines across the globe. In total, we've found 10 airlines that operate the 16,000 km flight from Boston to Sydney.
To find the best offers, book at least 2-3 months in advance. Consider flying during the off-peak season. Qantas is a popular choice, and the average flight duration is around 22 hours. After selecting an offer, fill out your information and proceed to payment. Don't forget to check our flight + hotel service to save time and money!
Other popular destinations near Sydney
Where other people are flying to
