Iberia's premium economy offers 37 inches of legroom and noise-canceling headphones for long-haul comfort.
Iberia provides two hot meal options on long-haul flights, with special meals available upon request.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $561 (TravelUp) |
One-way from | $516 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $818 |
Good round-trip deal | $766 or less |
Good one-way deal | $662 or less |
Fly from
Fly to
Route
Depart
Return
Price
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 3/19
9:00 am-5:20 pm
1 stop13h 20m
Chicago O'Hare Intl
Sat 3/28
4:25 pm-5:45 am
Nonstop8h 20m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sat 2/21
6:40 am-4:45 pm
1 stop16h 05m
Chicago O'Hare Intl
Sat 2/28
7:20 pm-4:25 pm
2 stops15h 05m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Mon 1/19
12:10 pm-7:15 pm
1 stop13h 05m
Chicago O'Hare Intl
Fri 1/30
6:45 pm-8:35 am
Nonstop7h 50m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sat 1/24
1:35 pm-5:00 pm
Nonstop9h 25m
Chicago O'Hare Intl
Fri 1/30
9:05 pm-11:15 am
Nonstop8h 10m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 1/22
7:40 am-11:00 am
Nonstop9h 20m
Chicago O'Hare Intl
Sun 2/1
5:50 pm-7:55 am
Nonstop8h 05m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 1/8
10:25 am-1:45 pm
Nonstop9h 20m
Chicago O'Hare Intl
Wed 1/14
1:00 pm-10:50 am
1 stop15h 50m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 1/22
7:40 am-11:00 am
Nonstop9h 20m
Chicago O'Hare Intl
Sun 1/25
5:50 pm-7:55 am
Nonstop8h 05m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sat 2/28
7:40 am-11:00 am
Nonstop9h 20m
Chicago O'Hare Intl
Tue 3/3
3:45 pm-5:55 am
Nonstop8h 10m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sat 2/14
1:35 pm-5:00 pm
Nonstop9h 25m
Chicago O'Hare Intl
Mon 2/23
9:15 pm-11:15 am
Nonstop8h 00m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 1/21
7:40 am-11:00 am
Nonstop9h 20m
Chicago O'Hare Intl
Sun 2/1
5:50 pm-7:55 am
Nonstop8h 05m
| 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 Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
The price you pay for your flight from London Heathrow Airport to Chicago may vary depending on when you book. For the best chance of a lower fare, look to book 45 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of $476). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of $671). 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 in the evening. If you’re flexible enough to do this you can expect to save up to 33% on your trip compared to booking a flight in the afternoon.
The most flights from LHR to CHI are scheduled on a Saturday (44 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (30 on average).
Reykjavik (KEF) – chosen by Cheapflights users on 80% of 1-stop itineraries from London Heathrow Airport to Chicago on Cheapflights.
Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $544.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 11h 08m.
Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 02m.
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.
Comfort
Boarding
Overall
Food
Entertainment
Crew
Reviews
Nate,Dec 2025
IAD - GSP
Comfort
Boarding
Overall
Food
Entertainment
Crew
Reviews
Nate,Dec 2025
IAD - GSP
Comfort
Boarding
Overall
Food
Entertainment
Crew
Reviews
Nate,Dec 2025
IAD - GSP
Comfort
Boarding
Overall
Food
Entertainment
Crew
Reviews
Nate,Dec 2025
IAD - GSP
Comfort
Boarding
Overall
Food
Entertainment
Crew
Reviews
Nate,Dec 2025
IAD - GSP
Comfort
Boarding
Overall
Food
Entertainment
Crew
Reviews
Nate,Dec 2025
IAD - GSP
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$446 | Average$672 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$451 | Average$544 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$485 | Average$613 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$530 | Average$897 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$552 | Average$776 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$558 | Average$784 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$558 | Average$778 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$572 | Average$784 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$625 | Average$769 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$720 | Average$830 | FlexibilityNo cancel fee | On-time76% |