Chicago to London flights
The cheapest round trip we found from Chicago to London is $852 (Jan 4 – 10, 2027, 1 stop). It usually costs $852.
CHI to LON · Round trip · Economy · Prices per person in USD · Price found (1 day ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $904 |
| December 2026 | $1,197 |
| January 2027 | $852 |
| February 2027 | $687 (cheapest month) |
| March 2027 | No fares found yet |
| April 2027 | $831 |
| May 2027 | No fares found yet |
| June 2027 | $996 |
Cheapest dates in the next 4 months
Round trip, per person-
Jan 4 – 10, 2027 6 nights · leave Mon$852$852 Book
Icelandair 1 stop · 9h 25m -
Nov 16 – 20 4 nights · leave Mon$904 +6% vs usual$904 +6% vs usual Book
jetBlue 1 stop · 9h 34m -
Nov 17 – Dec 4 17 nights · leave Tue$1,008 +18% vs usual$1,008 +18% vs usual Book
United Airlines 1 stop · 9h 38m -
Dec 11 – Jan 1, 2027 21 nights · leave Fri$1,197 +40% vs usual$1,197 +40% vs usual Book
Porter Airlines Canada 2 stops · 8h 55m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in London
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Airport transfer to London
Fixed prices from LHR on KiwitaxiTo see transfer prices here, turn on partner content in .
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Plan the rest of your trip
London · Jan 4 – 10, 2027- eSIM for United Kingdom Yesim · prepaid mobile data (opens Yesim in a new tab)
- Car rental in United Kingdom Economybookings · compare rental companies (opens Economybookings in a new tab)
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Good to know
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Chicago to London: questions
How much does a flight from Chicago to London cost?
The cheapest round trip we have found right now is $852, leaving January 4 and returning January 10. The usual price on this route is about $852. Prices are per person, economy, in USD.
What is the cheapest month to fly from Chicago to London?
February 2027, with round trips from $687. The most expensive month in our data is December (from $1,197). Based on the 6 months ahead we have prices for.
Which airports do Chicago to London flights use?
Chicago airports include O'Hare International (ORD), Chicago Midway International (MDW) and Chicago Rockford International (RFD). London airports include London Heathrow (LHR), London City (LCY) and London Gatwick (LGW). The prices on this page cover every airport in both cities (CHI and LON are the city codes).
About this route
We track round-trip economy fares from Chicago (United States) to London (United Kingdom) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $852, departing January 4 and returning January 10. The cheapest month to fly in our data is February, from $687. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.