BA's Club Suite offers private pods with doors, available on A350 and most 777 aircraft.
BA's World Traveller Plus offers extra seat width and legroom, ideal for long-haul comfort.

Most accurate provider | Gotogate 3 stars |
|---|---|
Most trusted provider | Gotogate 3 stars |
Round-trip from | $535 (Kiwi.com) |
One-way from | $237 (Trip.com) |
Popular in | June |
Cheapest in | January |
Average price | $685 |
Good round-trip deal | $705 or less |
Good one-way deal | $436 or less |
Fly from
Fly to
Route
Depart
Return
Price
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Tue 11/18
10:35 am-6:30 pm
2 stops25h 55m
London Heathrow
Tue 11/25
7:50 pm-4:45 pm
2 stops26h 55m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 4/22
7:30 am-9:35 am
2 stops20h 05m
London Heathrow
Mon 4/27
6:40 am-4:10 pm
2 stops15h 30m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Mon 11/17
9:45 pm-11:35 am
Nonstop7h 50m
London Heathrow
Wed 12/3
11:00 am-1:50 pm
Nonstop8h 50m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 11/19
9:30 am-6:50 am
2 stops15h 20m
London Heathrow
Wed 12/3
8:55 am-3:10 pm
1 stop12h 15m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Mon 2/16
9:45 pm-11:35 am
Nonstop7h 50m
London Heathrow
Fri 2/27
11:00 am-1:50 pm
Nonstop8h 50m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 11/19
3:50 pm-11:25 am
1 stop13h 35m
London Heathrow
Tue 12/2
8:55 am-4:45 pm
1 stop13h 50m
ChicagoLondon
MDW - LHR
MDWLHR
Chicago Midway
Tue 11/18
1:47 pm-7:05 am
1 stop11h 18m
London Heathrow
Tue 12/2
11:05 am-6:18 pm
1 stop13h 13m
ChicagoLondon
MDW - LHR
MDWLHR
Chicago Midway
Wed 11/26
5:34 pm-11:40 am
1 stop12h 06m
London Heathrow
Tue 12/9
3:50 pm-11:47 pm
1 stop13h 57m
ChicagoLondon
MDW - LHR
MDWLHR
Chicago Midway
Mon 11/17
6:00 am-6:25 am
1 stop18h 25m
London Heathrow
Wed 11/26
11:05 am-6:18 pm
1 stop13h 13m
ChicagoLondon
MDW - LHR
MDWLHR
Chicago Midway
Sun 11/16
10:47 am-6:25 am
1 stop13h 38m
London Heathrow
Fri 11/28
1:00 pm-8:52 am
1 stop25h 52m
| 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*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
To ensure you get the cheapest price possible for a flight from Chicago to London Heathrow Airport, you should look to book at least 29 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, May is the cheapest month in which you can book a flight from Chicago to London Heathrow Airport (average of $399). Flying from Chicago to London Heathrow Airport in June is currently the most expensive (average of $901). 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 Chicago to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 56% versus a flight in the morning.
Travelers seeking maximum savings on their Chicago to London Heathrow Airport flight should consider departing on Friday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from CHI to LHR are scheduled on a Sunday (45 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (39 on average).
Reykjavik (KEF) – chosen by Cheapflights users on 55% of 1-stop itineraries from Chicago to London Heathrow Airport on Cheapflights.
Dublin (DUB) is the most affordable 1-stop option, with an average round-trip price of $623.
Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 10h 03m.
Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 11m.
Boarding
Crew
Entertainment
Overall
Comfort
Food
Reviews
Julia,Feb 2024
JFK - HEL
Boarding
Crew
Entertainment
Overall
Comfort
Food
Reviews
Julia,Feb 2024
JFK - HEL
Boarding
Crew
Entertainment
Overall
Comfort
Food
Reviews
Julia,Feb 2024
JFK - HEL
Boarding
Crew
Entertainment
Overall
Comfort
Food
Reviews
Julia,Feb 2024
JFK - HEL
Boarding
Crew
Entertainment
Overall
Comfort
Food
Reviews
Julia,Feb 2024
JFK - HEL
Boarding
Crew
Entertainment
Overall
Comfort
Food
Reviews
Julia,Feb 2024
JFK - HEL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$51 | Average$625 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$257 | Average$594 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$338 | Average$569 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$345 | Average$870 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$450 | Average$644 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$460 | Average$947 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$481 | Average$610 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$487 | Average$677 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$515 | Average$818 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$542 | Average$793 | FlexibilityNo cancel fee | On-time76% |