
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $598 (The Travel House) |
One-way from | $474 (Kiwi.com) |
Popular in | July |
Cheapest in | September |
Average price | $778 |
Good round-trip deal | $841 or less |
Good one-way deal | $617 or less |
Fly from
Fly to
Route
Depart
Return
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 4/16
9:25 pm-9:25 pm
1 stop30h 00m
Chicago O'Hare Intl
Mon 4/20
7:25 pm-11:55 am
1 stop10h 30m
LondonChicago
LTN - ORD
LTNORD
London Luton
Wed 5/6
9:40 am-2:15 pm
2 stops34h 35m
Chicago O'Hare Intl
Wed 5/13
4:50 pm-10:40 pm
2 stops23h 50m
LondonChicago
LTN - ORD
LTNORD
London Luton
Mon 4/20
8:15 am-5:50 pm
2 stops15h 35m
Chicago O'Hare Intl
Mon 5/4
7:25 pm-10:05 pm
2 stops20h 40m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
Sat 4/18
3:40 pm-6:15 pm
1 stop32h 35m
Chicago O'Hare Intl
Thu 4/30
7:25 pm-2:40 pm
1 stop13h 15m
LondonChicago
LTN - ORD
LTNORD
London Luton
Thu 4/23
9:25 am-6:15 pm
2 stops14h 50m
Chicago O'Hare Intl
Thu 4/30
7:25 pm-11:25 pm
2 stops22h 00m
LondonChicago
LTN - ORD
LTNORD
London Luton
Mon 4/20
9:15 am-9:10 am
3 stops29h 55m
Chicago O'Hare Intl
Mon 4/27
7:25 pm-10:05 pm
2 stops20h 40m
LondonChicago
LTN - ORD
LTNORD
London Luton
Wed 6/3
6:15 am-6:15 pm
2 stops18h 00m
Chicago O'Hare Intl
Sun 6/7
7:25 pm-9:40 pm
2 stops20h 15m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Mon 4/20
11:05 am-2:10 pm
Nonstop9h 05m
Chicago O'Hare Intl
Mon 5/4
9:40 pm-11:55 am
Nonstop8h 15m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Mon 4/20
2:10 pm-5:20 pm
Nonstop9h 10m
Chicago O'Hare Intl
Mon 5/4
4:25 pm-6:45 am
Nonstop8h 20m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Mon 4/20
6:00 am-12:35 pm
1 stop12h 35m
Chicago O'Hare Intl
Mon 4/27
9:30 pm-5:50 pm
2 stops14h 20m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
The best time to book flights from London to Chicago O'Hare Intl Airport is 70 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, December is the cheapest month in which you can book a flight from London to Chicago O'Hare Intl Airport (average of $293). Flying from London to Chicago O'Hare Intl Airport in July is currently the most expensive (average of $659). 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.
When flying from London to Chicago O'Hare Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
About 10% of weekly flights between London and Chicago have experienced delays in the past year, with the average delay time being 169 minutes.
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Thursday 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.
Comfort
Overall
Boarding
Crew
Food
Entertainment
Reviews
Anonymous,Oct 2025
YUL - ORD
Comfort
Overall
Boarding
Crew
Food
Entertainment
Reviews
Anonymous,Oct 2025
YUL - ORD
Comfort
Overall
Boarding
Crew
Food
Entertainment
Reviews
Anonymous,Oct 2025
YUL - ORD
Comfort
Overall
Boarding
Crew
Food
Entertainment
Reviews
Anonymous,Oct 2025
YUL - ORD
Comfort
Overall
Boarding
Crew
Food
Entertainment
Reviews
Anonymous,Oct 2025
YUL - ORD
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$446 | Average$672 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$485 | Average$749 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$494 | Average$588 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$530 | Average$832 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$556 | Average$779 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$572 | Average$800 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$599 | Average$918 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$618 | Average$821 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$653 | Average$789 | FlexibilityNo cancel fee | On-timeN/A |