BA's Club Suite offers private pods with doors, ideal for long-haul comfort.
BA's World Traveller Plus offers extra seat width and legroom, enhancing comfort.

Most accurate provider | Justfly.com 3 stars |
|---|---|
Most trusted provider | Justfly.com 3 stars |
Round-trip from | $532 (The Travel House) |
Popular in | July |
Cheapest in | September |
Average price | $791 |
Good round-trip deal | $717 or less |
Good one-way deal | $594 or less |
Fly from
Fly to
Route
Depart
Return
Price
LondonChicago
LHR - ORD
LHRORD
London Heathrow
vie. 11/7
9:05 pm-4:45 pm
2 stops25h 40m
Chicago O'Hare Intl
vie. 11/28
7:20 pm-4:00 pm
1 stop14h 40m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
jue. 11/13
10:20 am-4:45 pm
1 stop12h 25m
Chicago O'Hare Intl
sáb. 1/10
7:20 pm-4:00 pm
1 stop14h 40m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
jue. 11/6
12:15 pm-5:20 pm
1 stop11h 05m
Chicago O'Hare Intl
mié. 11/12
6:30 pm-10:50 am
1 stop10h 20m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
lun. 11/24
9:00 am-4:20 pm
1 stop13h 20m
Chicago O'Hare Intl
lun. 12/1
3:45 pm-5:55 am
Nonstop8h 10m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
lun. 12/8
9:00 am-4:20 pm
1 stop13h 20m
Chicago O'Hare Intl
lun. 12/15
9:05 pm-11:15 am
Nonstop8h 10m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
dom. 4/12
1:05 pm-6:15 pm
1 stop11h 10m
Chicago O'Hare Intl
mié. 4/22
7:25 pm-8:20 pm
1 stop18h 55m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
lun. 11/24
6:00 am-2:00 pm
1 stop14h 00m
Chicago O'Hare Intl
lun. 12/1
5:50 pm-7:55 am
Nonstop8h 05m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
lun. 2/16
6:00 am-2:00 pm
1 stop14h 00m
Chicago O'Hare Intl
mar. 2/24
5:50 pm-7:55 am
Nonstop8h 05m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
dom. 2/1
1:45 pm-4:20 pm
1 stop32h 35m
Chicago O'Hare Intl
lun. 2/9
5:50 pm-7:55 am
Nonstop8h 05m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
vie. 2/13
8:35 pm-5:20 pm
1 stop26h 45m
Chicago O'Hare Intl
vie. 2/20
6:30 pm-10:50 am
1 stop10h 20m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
The best time to book flights from London Heathrow Airport to Chicago O'Hare Intl Airport is 44 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of $478). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in July is currently the most expensive (average of $673). 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.
A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Chicago O'Hare Intl Airport in the evening. If you’re flexible enough to do this you can expect to save up to 38% on your trip compared to booking a flight in the afternoon.
About 11% of weekly flights between London and Chicago have experienced delays in the past year, with the average delay time being 176 minutes.
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Saturday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Over the last year, SWISS have had the lowest number of delays on this route, with just 5% of flights being delayed.
Food
Entertainment
Boarding
Crew
Overall
Comfort
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Entertainment
Boarding
Crew
Overall
Comfort
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Entertainment
Boarding
Crew
Overall
Comfort
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Entertainment
Boarding
Crew
Overall
Comfort
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Entertainment
Boarding
Crew
Overall
Comfort
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Entertainment
Boarding
Crew
Overall
Comfort
Reviews
Anonymous,Oct 2025
YUL - ORD
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$446 | Average$632 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$451 | Average$565 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$485 | Average$723 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$530 | Average$943 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$553 | Average$763 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$558 | Average$789 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$572 | Average$801 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$599 | Average$794 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$626 | Average$852 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$633 | Average$832 | FlexibilityNo cancel fee | On-timeN/A |