
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $520 (Kiwi.com) |
One-way from | $353 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $693 |
Good round-trip deal | $642 or less |
Good one-way deal | $389 or less |
Fly from
Fly to
Route
Depart
Return
Price
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Tue 3/17
4:45 pm-5:55 am
Nonstop8h 10m
London Heathrow
Wed 3/25
11:10 am-7:25 pm
1 stop13h 15m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Mon 3/9
6:45 pm-7:55 am
Nonstop8h 10m
London Heathrow
Tue 3/17
6:50 am-1:10 pm
1 stop11h 20m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 2/25
5:50 pm-7:55 am
Nonstop8h 05m
London Heathrow
Wed 3/4
6:50 am-12:10 pm
1 stop11h 20m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 3/4
9:15 pm-11:15 am
Nonstop8h 00m
London Heathrow
Mon 3/9
1:45 pm-5:20 pm
1 stop32h 35m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Mon 2/16
3:45 pm-5:55 am
Nonstop8h 10m
London Heathrow
Mon 2/23
12:05 pm-4:20 pm
1 stop34h 15m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 4/22
10:35 pm-12:15 pm
Nonstop7h 40m
London Heathrow
Tue 5/5
10:20 am-5:50 pm
1 stop13h 30m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Sun 3/22
5:40 pm-8:45 am
1 stop10h 05m
London Heathrow
Tue 3/31
6:30 am-3:19 pm
2 stops14h 49m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 4/29
4:25 pm-6:45 am
Nonstop8h 20m
London Heathrow
Tue 5/5
6:50 am-12:00 pm
1 stop11h 10m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Mon 3/30
9:40 am-6:25 am
1 stop14h 45m
London Heathrow
Mon 4/6
8:55 pm-2:15 pm
1 stop23h 20m
ChicagoLondon
ORD - LHR
ORDLHR
Chicago O'Hare Intl
Wed 3/11
10:05 pm-11:15 am
Nonstop8h 10m
London Heathrow
Fri 3/20
10:25 am-2:45 pm
Nonstop9h 20m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
The price you pay for your flight from Chicago O'Hare Intl Airport to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 33 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, May is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of $399). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $896). 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.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago O'Hare Intl Airport to London Heathrow Airport as you normally would.
About 26% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 167 minutes.
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Over the last year, American Airlines have had the lowest number of delays on this route, with just 25% of flights being delayed.
Reykjavik (KEF) – chosen by Cheapflights users on 60% of 1-stop itineraries from Chicago O'Hare Intl Airport to London Heathrow Airport on Cheapflights.
Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $656.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 10h 23m.
Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 00m.
Entertainment
Boarding
Crew
Food
Overall
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
Entertainment
Boarding
Crew
Food
Overall
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
Entertainment
Boarding
Crew
Food
Overall
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
Entertainment
Boarding
Crew
Food
Overall
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
Entertainment
Boarding
Crew
Food
Overall
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
Entertainment
Boarding
Crew
Food
Overall
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$51 | Average$505 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$257 | Average$573 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$331 | Average$564 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$345 | Average$746 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$427 | Average$577 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$480 | Average$1,131 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$481 | Average$582 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$493 | Average$775 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$516 | Average$774 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$522 | Average$809 | FlexibilityNo cancel fee | On-time75% |