Route guide
Cheap Flights from Chicago to London
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Planning a trip from Chicago to London? The average flight time on this route is 7h 55m. The lowest fare we have cached for this route is $321 (last checked Sep 16, 2026). February is the cheapest month recorded for this route in our cached fare data.
Frequently asked questions
How long is the flight from Chicago to London?
The average flight time for this route is 7h 55m. Itineraries with a connection usually run longer depending on layover length and airline.
What is the cheapest month to fly to London?
February is the cheapest month recorded for this route in our cached fare data. The lowest fare we have cached for this route is $321 (last checked Sep 16, 2026).