
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $678 (FlightHub) |
One-way from | $388 (Mytrip) |
Popular in | June |
Cheapest in | February |
Average price | $696 |
Good round-trip deal | $875 or less |
Good one-way deal | $486 or less |
Fly from
Fly to
Route
Depart
Return
ChicagoLondon
ORD - LTN
ORDLTN
Chicago O'Hare Intl
Sun 9/20
7:25 pm-10:20 pm
2 stops20h 55m
London Luton
Wed 10/7
9:50 pm-11:50 am
1 stop20h 00m
ChicagoLondon
ORD - LTN
ORDLTN
Chicago O'Hare Intl
Mon 4/27
7:25 pm-10:05 pm
2 stops20h 40m
London Luton
Sat 5/2
6:15 pm-4:00 pm
2 stops27h 45m
ChicagoLondon
ORD - LTN
ORDLTN
Chicago O'Hare Intl
Sun 6/7
9:55 am-10:20 pm
2 stops30h 25m
London Luton
Tue 6/9
9:40 am-6:15 pm
2 stops14h 35m
ChicagoLondon
MDW - LGW
MDWLGW
Chicago Midway
Thu 5/14
3:20 pm-7:55 am
2 stops34h 35m
London Gatwick
Wed 5/20
11:35 am-2:35 pm
2 stops33h 00m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 4/29
11:08 am-7:15 am
1 stop14h 07m
London Heathrow
Tue 5/5
6:30 am-2:15 pm
1 stop13h 45m
ChicagoLondon
ORD - LTN
ORDLTN
Chicago O'Hare Intl
Fri 5/8
2:20 pm-12:30 am
3 stops28h 10m
London Luton
Sat 6/6
5:50 pm-11:50 am
1 stop24h 00m
ChicagoLondon
MDW - LHR
MDWLHR
Chicago Midway
Wed 5/6
12:52 pm-7:15 am
1 stop12h 23m
London Heathrow
Fri 5/15
9:55 am-6:33 pm
2 stops14h 38m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Sun 9/13
9:15 pm-11:15 am
Nonstop8h 00m
London Heathrow
Wed 9/23
11:10 am-1:50 pm
Nonstop8h 40m
ChicagoLondon
ORD - LCY
ORDLCY
Chicago O'Hare Intl
Sun 5/3
4:20 pm-5:20 pm
1 stop19h 00m
London City
Tue 5/12
8:25 am-2:15 pm
1 stop11h 50m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Tue 5/12
6:31 pm-12:05 pm
1 stop11h 34m
London Heathrow
Wed 6/17
6:30 am-3:05 pm
2 stops14h 35m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
The best time to book flights from Chicago to London is 33 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, November is the cheapest month in which you can book a flight from Chicago to London (average of $639). Flying from Chicago to London in February is currently the most expensive (average of $1,203). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago to London as you normally would.
The most flights from CHI to LON are scheduled on a Thursday (52 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (38 on average).
Reykjavik (KEF) – chosen by Cheapflights users on 67% of 1-stop itineraries from Chicago to London on Cheapflights.
Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $478.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 10h 23m.
Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 00m.
About 25% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 170 minutes.
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Over the last year, American Airlines have had the lowest number of delays on this route, with just 25% of flights being delayed.
Entertainment
Comfort
Food
Overall
Boarding
Crew
Reviews
Anonymous,Apr 2026
DFW - EWR
Entertainment
Comfort
Food
Overall
Boarding
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Reviews
Anonymous,Apr 2026
DFW - EWR
Entertainment
Comfort
Food
Overall
Boarding
Crew
Reviews
Anonymous,Apr 2026
DFW - EWR
Entertainment
Comfort
Food
Overall
Boarding
Crew
Reviews
Anonymous,Apr 2026
DFW - EWR
Entertainment
Comfort
Food
Overall
Boarding
Crew
Reviews
Anonymous,Apr 2026
DFW - EWR
Entertainment
Comfort
Food
Overall
Boarding
Crew
Reviews
Anonymous,Apr 2026
DFW - EWR
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$51 | Average$373 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$321 | Average$579 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$345 | Average$877 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$377 | Average$726 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$428 | Average$645 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$467 | Average$656 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$481 | Average$803 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$513 | Average$825 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$522 | Average$809 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$532 | Average$751 | FlexibilityNo cancel fee | On-time70% |