
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $819 (oojo) |
One-way from | $431 (Super.com) |
Popular in | June |
Cheapest in | January |
Average price | $875 |
Good round-trip deal | $969 or less |
Good one-way deal | $504 or less |
Fly from
Fly to
Route
Depart
Return
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Mon 7/20
5:00 pm-6:50 am
Nonstop7h 50m
London Heathrow
Tue 8/25
10:20 am-5:50 pm
1 stop13h 30m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Tue 10/6
7:05 pm-4:25 pm
1 stop15h 20m
London Heathrow
Mon 10/12
6:40 pm-12:35 pm
1 stop23h 55m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Sun 8/16
9:15 pm-11:15 am
Nonstop8h 00m
London Heathrow
Thu 9/10
1:10 pm-3:55 pm
Nonstop8h 45m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Mon 8/3
3:19 pm-9:15 am
1 stop11h 56m
London Heathrow
Wed 8/12
6:15 am-4:24 pm
2 stops16h 09m
ChicagoLondon
MDW - LHR
MDWLHR
Chicago Midway
Mon 8/3
1:27 pm-7:10 am
1 stop11h 43m
London Heathrow
Wed 8/12
3:15 pm-10:36 pm
1 stop13h 21m
ChicagoLondon
MDW - LHR
MDWLHR
Chicago Midway
Sun 8/9
12:46 pm-6:25 am
1 stop11h 39m
London Heathrow
Tue 8/18
10:45 am-6:33 pm
1 stop13h 48m
ChicagoLondon
MDW - LHR
MDWLHR
Chicago Midway
Sun 8/2
1:18 pm-10:20 am
2 stops15h 02m
London Heathrow
Thu 8/13
3:15 pm-10:36 pm
1 stop13h 21m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Tue 9/15
6:35 pm-9:00 am
Nonstop8h 25m
London Heathrow
Mon 9/21
2:05 pm-8:12 pm
1 stop12h 07m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Sun 9/20
7:15 pm-9:20 am
1 stop32h 05m
London Heathrow
Sun 9/27
6:40 pm-4:10 pm
1 stop27h 30m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 9/23
7:15 pm-9:20 am
1 stop32h 05m
London Heathrow
Sun 9/27
5:00 pm-4:10 pm
1 stop29h 10m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars |
To ensure you get the cheapest price possible for a flight from Chicago to London Heathrow Airport, you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, January is the cheapest month in which you can book a flight from Chicago to London Heathrow Airport (average of $200). Flying from Chicago to London Heathrow Airport in April is currently the most expensive (average of $1,775). 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 Heathrow Airport as you normally would.
The most flights from CHI to LHR are scheduled on a Monday (58 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (57 on average).
Reykjavik (KEF) – chosen by Cheapflights users on 63% of 1-stop itineraries from Chicago to London Heathrow Airport on Cheapflights.
Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $656.
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 174 minutes.
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving at night 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, United Airlines have had the lowest number of delays on this route, with just 25% of flights being delayed.
Overall
Food
Crew
Comfort
Boarding
Entertainment
Reviews
Dynasty,May 2026
LAX - EWR
Overall
Food
Crew
Comfort
Boarding
Entertainment
Reviews
Dynasty,May 2026
LAX - EWR
Overall
Food
Crew
Comfort
Boarding
Entertainment
Reviews
Dynasty,May 2026
LAX - EWR
Overall
Food
Crew
Comfort
Boarding
Entertainment
Reviews
Dynasty,May 2026
LAX - EWR
Overall
Food
Crew
Comfort
Boarding
Entertainment
Reviews
Dynasty,May 2026
LAX - EWR
Overall
Food
Crew
Comfort
Boarding
Entertainment
Reviews
Dynasty,May 2026
LAX - EWR
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$51 | Average$240 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$321 | Average$581 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$345 | Average$626 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$377 | Average$703 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$428 | Average$675 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$476 | Average$578 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$481 | Average$843 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$513 | Average$826 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$522 | Average$809 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$528 | Average$759 | FlexibilityNo cancel fee | On-time70% |