Cheap flights from Chicago-O'Hare to Sydney
Cheap return flights from Chicago-O'Hare 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 Chicago-O'Hare to Sydney.
What airlines fly indirectly?
- Delta Airlines
- Air New Zealand
- Singapore Airlines
These airlines fly from Chicago-O'Hare to Sydney, but you’ll have at least one layover.
How long is the flight?
20 hours 30 minutes
This is the shortest flight time from Chicago-O'Hare to Sydney.
Alternative flights from the UK to Sydney
Check out prices for other routes
Alternative flights from Chicago-O'Hare
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 Chicago-O'Hare/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 Chicago-O'Hare to Sydney
Tips and advice from our flight experts
You've searched for flights from Chicago-O'Hare to Sydney. We've found 25 flights and compared multiple offers to give you the best deal. On average, Qantas is the cheapest airline for this route, so keep an eye on them. The cheapest offer we've found is a one-way ticket from Chicago-O'Hare to Sydney for £89 on 27/03/2026 at 09:05.
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 Chicago-O'Hare to Sydney.
To find the best offers, consider booking 2-3 months in advance or looking for last-minute deals. Qantas is a popular and affordable choice for this route, with an average flight duration of 20 hours 30 minutes. After selecting an offer, fill out your information and proceed to payment. Don't forget to check our flight + hotel service to book everything at once, saving you time and money.
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Where other people are flying to
