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 | $608 (Icelandair) |
One-way from | $529 (Lufthansa) |
Popular in | July |
Cheapest in | September |
Average price | $850 |
Good round-trip deal | $739 or less |
Good one-way deal | $637 or less |
Fly from
Fly to
Route
Depart
Return
Price
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 3/4
10:20 am-4:45 pm
1 stop12h 25m
Chicago O'Hare Intl
Tue 3/10
10:40 am-9:20 am
2 stops17h 40m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 2/19
10:20 am-4:45 pm
1 stop12h 25m
Chicago O'Hare Intl
Tue 2/24
10:36 am-5:40 pm
2 stops25h 04m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 3/18
12:15 pm-6:20 pm
1 stop11h 05m
Chicago O'Hare Intl
Fri 3/27
7:30 pm-7:30 pm
1 stop19h 00m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 3/4
10:30 am-8:05 pm
1 stop15h 35m
Chicago O'Hare Intl
Tue 3/10
6:45 pm-7:55 am
Nonstop8h 10m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 3/19
10:20 am-5:45 pm
1 stop12h 25m
Chicago O'Hare Intl
Sat 3/28
7:35 pm-5:50 pm
2 stops17h 15m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 1/21
12:05 pm-4:20 pm
1 stop34h 15m
Chicago O'Hare Intl
Thu 1/29
9:05 pm-11:15 am
Nonstop8h 10m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 3/4
2:10 pm-5:00 pm
Nonstop8h 50m
Chicago O'Hare Intl
Tue 3/10
10:45 pm-11:35 am
Nonstop7h 50m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Mon 1/12
5:10 pm-4:20 pm
1 stop29h 10m
Chicago O'Hare Intl
Mon 1/19
6:50 pm-4:40 pm
2 stops15h 50m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Mon 1/12
10:25 am-1:45 pm
Nonstop9h 20m
Chicago O'Hare Intl
Mon 1/19
3:45 pm-5:55 am
Nonstop8h 10m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 3/12
1:35 pm-6:00 pm
Nonstop9h 25m
| 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 $476). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in July is currently the most expensive (average of $670). 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 34% 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 172 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, United Airlines have had the lowest number of delays on this route, with just 5% of flights being delayed.
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Anonymous,Oct 2025
YUL - ORD
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$446 | Average$650 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$451 | Average$544 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$485 | Average$639 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$530 | Average$897 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$552 | Average$770 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$558 | Average$789 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$558 | Average$793 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$572 | Average$803 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$625 | Average$808 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$720 | Average$830 | FlexibilityNo cancel fee | On-time76% |