Find cheap flights from Illinois to London

Find cheap flights from Illinois to London

Round-trip
Economy
Washington (WAS)
London All airports
Tue 6/2
Tue 6/9
Any month
Compare vs. KAYAK |
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)

Airports
Origin
Chicago
$406
only
$406
Destination
London
$418
only
$418
$420
only
$420
$406
only
$406
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Wed, Sep 16
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
10h 15m
Wed, Sep 23
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 15m
Trip: 8 days
Based on null reviews

Book cheap flights from Illinois to London (one-way)

Airports
Origin
Chicago
$189
only
$189
Destination
London
$251
only
$251
$239
only
$239
$189
only
$189
Tue, Jul 14
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 47m
Based on null reviews
Tue, Jul 14
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 47m
Based on null reviews
Sat, Jul 11
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
14h 45m
Based on null reviews
Tue, Aug 11
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
17h 55m
Based on null reviews
Thu, Jun 18
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
14h 05m
Based on null reviews
Tue, Jun 30
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
13h 52m
Based on null reviews
Tue, Jun 30
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
13h 52m
Based on null reviews
Sun, May 24
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
7h 45m
Based on null reviews
Sun, Jun 21
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
14h 35m
Based on null reviews
Wed, Jun 10
ORD
Chicago O'Hare Airport
LCY
London City
11h 30m
Based on null reviews
Wed, Jun 10
ORD
Chicago O'Hare Airport
LCY
London City
11h 30m
Based on null reviews
Wed, Jun 10
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
12h 05m
Based on null reviews
Wed, Jun 10
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 00m
Based on null reviews
Wed, Jun 10
ORD
Chicago O'Hare Airport
LCY
London City
15h 00m
Based on null reviews
Thu, Jun 4
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
10h 00m
Based on null reviews
Wed, Jun 10
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
10h 15m
Based on null reviews
Wed, Jun 10
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
10h 15m
Based on null reviews
Mon, Jul 13
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
17h 51m
Based on null reviews
Mon, Jul 13
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
48h 41m
Based on null reviews
Sat, Jul 4
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
19h 20m
Based on null reviews

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
Airline reviews
Read more about SWISS
*
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.

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 and someone from our team will get back to you promptly.

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