September is by far the best month, wherein you can get cheapest flights for London to Chicago. Meanwhile, is perceived as the expensive month due to the varying factors. That’s why it’s highly advised to make advanced online flight booking to save huge amounts of money.
Disclaimer - All the mentioned fares were found within last 48 hrs. The displayed fares are based on historical data and are subject to change. The fares cannot be guaranteed at the time of booking.
LHR
13:05
London London Heathrow Airport
Wed , 03 Sep 2025
ORD
18:15
Chicago Chicago O Hare International Airport
Wed, 03 Sep 2025
LHR
08:50
London London Heathrow Airport
Wed , 03 Sep 2025
ORD
14:00
Chicago Chicago O Hare International Airport
Wed, 03 Sep 2025
LHR
19:30
London London Heathrow Airport
Wed , 03 Sep 2025
ORD
16:10
Chicago Chicago O Hare International Airport
Thu, 04 Sep 2025
LHR
13:05
London London Heathrow Airport
Tue , 02 Sep 2025
ORD
18:15
Chicago Chicago O Hare International Airport
Tue, 02 Sep 2025
LHR
13:25
London London Heathrow Airport
Tue , 02 Sep 2025
ORD
19:00
Chicago Chicago O Hare International Airport
Tue, 02 Sep 2025
LHR
10:15
London London Heathrow Airport
Wed , 03 Sep 2025
ORD
19:40
Chicago Chicago O Hare International Airport
Wed, 03 Sep 2025
LHR
08:50
London London Heathrow Airport
Tue , 02 Sep 2025
ORD
14:00
Chicago Chicago O Hare International Airport
Tue, 02 Sep 2025
LHR
19:50
London London Heathrow Airport
Wed , 03 Sep 2025
ORD
12:35
Chicago Chicago O Hare International Airport
Thu, 04 Sep 2025
LHR
10:20
London London Heathrow Airport
Tue , 02 Sep 2025
ORD
16:10
Chicago Chicago O Hare International Airport
Tue, 02 Sep 2025
LHR
06:30
London London Heathrow Airport
Tue , 02 Sep 2025
ORD
15:10
Chicago Chicago O Hare International Airport
Tue, 02 Sep 2025
LHR
22:25
London London Heathrow Airport
Tue , 02 Sep 2025
ORD
09:40
Chicago Chicago O Hare International Airport
Wed, 03 Sep 2025