What is the cheapest month to fly to London?

The cheapest time of year to fly to London from Chicago is April. Most expensive is December

What is the cheapest day to fly to London?

The cheapest day of the week is typically Tuesday. The most expensive is typically Saturday

Chicago to London flights are approximately 6% more expensive in the evening than at noon

Ryanair, Frontier, and Norwegian are the most popular carriers operating from Chicago to London

Fly from Chicago O'Hare Intl to London Gatwick for the best Chicago - London flight prices

The cheapest time to buy a flight from Chicago to London is approximately 47 days to departure

Best Price Found	$326	The best flight deal from Chicago to London found on momondo in the last 72 hours is $326
Fastest flight time	7h 40m	The fastest flight from Chicago to London takes 7h 40m.
Direct flights	Every day	Direct flights go from Chicago to London every day.
Airports in London	6 airports	There are 6 airports near London: London City (LCY), London Heathrow (LHR), London Luton (LTN), London Stansted (STN), London Gatwick (LGW), London Southend (SEN)