Cheap flights from Chicago-O'Hare to London-Heathrow
Cheap return flights from Chicago-O'Hare to London-Heathrow
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
London-Heathrow flight facts
What you need to know
What are the cheapest airlines?
- Norwegian Air
- British Airways
- Icelandair
These airlines usually offer the cheapest flights from Chicago-O'Hare to London-Heathrow.
What airlines fly indirectly?
- American Airlines
- Delta Air Lines
- United Airlines
These airlines fly from Chicago-O'Hare to London-Heathrow, but you’ll have at least one layover.
How long is the flight?
8 hours 30 minutes
This is the shortest flight time from Chicago-O'Hare to London-Heathrow.
Alternative flights from the UK to London-Heathrow
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/London-Heathrow route. There are around 35 flights on any given week from the UK to London-Heathrow 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 London-Heathrow
Tips and advice from our flight experts
You've searched for flights from Chicago to London. We've found 25 flights and compared them to give you the best offers. Norwegian Air is the average cheapest airline for this route, so keep an eye on them. The cheapest offer we've found is a one-way ticket for £84 from Chicago to London on 26/04/2026 at 05:40.
We've scanned hundreds of airfares from various airlines across the globe. In total, we've found 10 airlines that operate the 6,400 km flight from Chicago to London.
To find the best offers, consider booking 2-3 months in advance or look for last-minute deals. Norwegian Air is a popular choice for this route, with an average flight duration of 8 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 save time and money!
Other popular destinations near London-Heathrow
Where other people are flying to
