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Find cheap flights from Illinois to London
Round-trip
Economy
Search hundreds of travel sites at once for deals on flights to London
Good to know
Low season |
February | Best time to beat the crowds with an average 5% drop in price. |
|---|---|---|
High season |
December | Most popular time to fly with an average 22% increase in price. |
Average price of a round-trip |
$1175 | (avg. price over the last 2 weeks) |
Good deal for a round-trip |
$430 | or less |
FAQs for booking Illinois to London flights
How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?
Book cheap flights from Illinois to London (round-trip)
Multiple Airlines
Tue, Sep 8
ORD
Chicago O'Hare Airport
STN
London Stansted Airport
20h 00m
Wed, Sep 16
STN
London Stansted Airport
ORD
Chicago O'Hare Airport
25h 40m
Trip: 9 days
Based on null reviews
TAP AIR PORTUGAL
Tue, Nov 10
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
14h 40m
Tue, Nov 17
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
14h 25m
Trip: 8 days
Based on null reviews
Multiple Airlines
Tue, Jul 14
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 47m
Fri, Jul 31
LGW
London Gatwick Airport
ORD
Chicago O'Hare Airport
36h 00m
Trip: 18 days
Based on null reviews
Icelandair
Sun, Oct 11
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 20m
Fri, Oct 16
LGW
London Gatwick Airport
ORD
Chicago O'Hare Airport
11h 15m
Trip: 6 days
Based on null reviews
Icelandair
Wed, Oct 28
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 20m
Wed, Nov 4
LGW
London Gatwick Airport
ORD
Chicago O'Hare Airport
11h 30m
Trip: 8 days
Based on null reviews
Icelandair
Tue, Oct 13
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 20m
Tue, Oct 20
LGW
London Gatwick Airport
ORD
Chicago O'Hare Airport
11h 15m
Trip: 8 days
Based on null reviews
Icelandair
Wed, Oct 14
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 20m
Tue, Oct 20
LGW
London Gatwick Airport
ORD
Chicago O'Hare Airport
11h 15m
Trip: 7 days
Based on null reviews
Icelandair
Wed, Oct 28
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
10h 20m
Wed, Nov 4
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 05m
Trip: 8 days
Based on null reviews
Icelandair
Sun, Oct 11
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
10h 15m
Fri, Oct 16
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 15m
Trip: 6 days
Based on null reviews
Icelandair
Tue, Oct 6
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
18h 50m
Tue, Oct 20
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 15m
Trip: 15 days
Based on null reviews
Icelandair
Tue, Oct 13
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
10h 15m
Tue, Oct 20
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 15m
Trip: 8 days
Based on null reviews
Icelandair
Wed, Oct 14
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
18h 50m
Tue, Oct 20
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 15m
Trip: 7 days
Based on null reviews
Multiple Airlines
Mon, Sep 21
ORD
Chicago O'Hare Airport
STN
London Stansted Airport
23h 00m
Mon, Sep 28
STN
London Stansted Airport
ORD
Chicago O'Hare Airport
25h 40m
Trip: 8 days
Based on null reviews
Icelandair
Mon, Sep 28
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
18h 50m
Fri, Oct 2
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 15m
Trip: 5 days
Based on null reviews
Icelandair
Tue, Oct 13
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 20m
Tue, Oct 20
LGW
London Gatwick Airport
ORD
Chicago O'Hare Airport
26h 40m
Trip: 8 days
Based on null reviews
Icelandair
Wed, Nov 11
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 20m
Wed, Nov 18
LGW
London Gatwick Airport
ORD
Chicago O'Hare Airport
11h 30m
Trip: 8 days
Based on null reviews
Icelandair
Sun, Sep 13
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
18h 50m
Wed, Sep 30
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 15m
Trip: 18 days
Based on null reviews
Icelandair
Wed, Nov 11
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 20m
Wed, Nov 18
LGW
London Gatwick Airport
ORD
Chicago O'Hare Airport
11h 30m
Trip: 8 days
Based on null reviews
Icelandair
Sun, Sep 20
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
10h 15m
Wed, Sep 30
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 15m
Trip: 11 days
Based on null reviews
Book cheap flights from Illinois to London (one-way)
Based on null reviews
Based on null reviews
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Top airlines flying from Illinois to London
Scores according to KAYAK customer reviews
8.1
SWISS
Overall score based on 8,958 reviews
8.3
Boarding
7.9
Comfort
8.7
Crew
7.8
Entertainment
8.0
Food
Flights to London
Return flight deals:
Browse origins:
Browse destinations:
- Flights »
- Worldwide »
- Europe »
- United Kingdom »
- England »
- Flights to London
$559
$417
$421
$461
$452
$449
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.
We attempt to get accurate prices, however, prices are not guaranteed.
We attempt to get accurate prices, however, prices are not guaranteed.
Here's why:
We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.
We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.
Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.
If you have more questions or if you have a bad price to report to us,
please send us an
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and someone from our team will get back to you promptly.
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