Find cheap flights from London to Illinois

Find cheap flights from London to Illinois

Round-trip
Economy
London (LON)
Illinois
Wed 7/15
Wed 7/22
Any month
Compare vs. KAYAK |
Search hundreds of travel sites at once for deals on flights to Illinois

Good to know

Low season

February Best time to beat the crowds with an average 11% drop in price.

High season

July Most popular time to fly with an average 27% increase in price.

Average price of a round-trip

$603 (avg. price over the last 2 weeks)

Good deal for a round-trip

$471 or less

FAQs for booking London to Illinois flights

Are flight prices cheaper from London to Illinois because of coronavirus (COVID-19)?

How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?

Top airlines flying from London to Illinois

Scores according to KAYAK customer reviews

8.1
SWISS
Overall score based on 8,965 reviews
8.2
Boarding
7.9
Comfort
8.7
Crew
7.8
Entertainment
8.0
Food
Airline reviews
Read more about SWISS

Book cheap flights from London to Illinois (round-trip)

Airports
Origin
London
$376
only
$376
$365
only
$365
$505
only
$505
$377
only
$377
$351
only
$351
Destination
Chicago
$351
only
$351
$448
only
$448
Mon, Aug 31
STN
London Stansted Airport
ORD
Chicago O'Hare Airport
25h 40m
Sat, Sep 19
ORD
Chicago O'Hare Airport
STN
London Stansted Airport
20h 00m
Trip: 20 days
Based on null reviews
Wed, Nov 4
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
25h 55m
Sun, Nov 8
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
14h 40m
Trip: 5 days
Based on null reviews
Wed, Sep 23
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
12h 30m
Tue, Sep 29
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
11h 15m
Trip: 7 days
Based on null reviews
Wed, Sep 23
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
13h 45m
Tue, Sep 29
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
8h 05m
Trip: 7 days
Based on null reviews
Tue, Nov 10
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 15m
Tue, Nov 17
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
11h 15m
Trip: 8 days
Based on null reviews
Tue, Sep 29
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 15m
Thu, Oct 29
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
8h 00m
Trip: 31 days
Based on null reviews
Wed, Oct 14
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
8h 40m
Wed, Nov 18
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
7h 40m
Trip: 36 days
Based on null reviews
Wed, Oct 14
LHR
London Heathrow Airport
MDW
Chicago Midway Airport
12h 56m
Thu, Nov 19
MDW
Chicago Midway Airport
LHR
London Heathrow Airport
10h 35m
Trip: 37 days
Based on null reviews
Wed, Sep 16
LHR
London Heathrow Airport
MDW
Chicago Midway Airport
16h 55m
Mon, Sep 21
MDW
Chicago Midway Airport
LHR
London Heathrow Airport
15h 00m
Trip: 6 days
Based on null reviews
Mon, Sep 28
LHR
London Heathrow Airport
MDW
Chicago Midway Airport
14h 56m
Tue, Nov 3
MDW
Chicago Midway Airport
LHR
London Heathrow Airport
14h 30m
Trip: 37 days
Based on null reviews
Wed, Sep 16
LCY
London City
ORD
Chicago O'Hare Airport
12h 40m
Wed, Sep 30
ORD
Chicago O'Hare Airport
LCY
London City
13h 30m
Trip: 15 days
Based on null reviews
Thu, Oct 8
LCY
London City
ORD
Chicago O'Hare Airport
13h 15m
Mon, Oct 12
ORD
Chicago O'Hare Airport
LCY
London City
12h 25m
Trip: 5 days
Based on null reviews
Wed, Sep 16
STN
London Stansted Airport
ORD
Chicago O'Hare Airport
25h 40m
Thu, Sep 24
ORD
Chicago O'Hare Airport
STN
London Stansted Airport
20h 00m
Trip: 9 days
Based on null reviews
Mon, Nov 16
LGW
London Gatwick Airport
ORD
Chicago O'Hare Airport
27h 50m
Sun, Nov 29
ORD
Chicago O'Hare Airport
LGW
London Gatwick Airport
17h 45m
Trip: 14 days
Based on null reviews
Wed, Oct 14
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
13h 45m
Wed, Nov 18
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
14h 45m
Trip: 36 days
Based on null reviews
Wed, Sep 2
LTN
London Luton Airport
ORD
Chicago O'Hare Airport
28h 45m
Sat, Sep 19
ORD
Chicago O'Hare Airport
LTN
London Luton Airport
21h 50m
Trip: 18 days
Based on null reviews
Sat, Sep 5
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
23h 40m
Sun, Sep 13
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
11h 15m
Trip: 9 days
Based on null reviews
Mon, Sep 21
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 15m
Thu, Oct 1
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
7h 50m
Trip: 11 days
Based on null reviews
Sat, Nov 21
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
24h 30m
Tue, Dec 1
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
14h 40m
Trip: 11 days
Based on null reviews
Sun, Sep 20
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
27h 30m
Sun, Sep 27
ORD
Chicago O'Hare Airport
LHR
London Heathrow Airport
7h 50m
Trip: 8 days
Based on null reviews

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

Airports
Origin
London
$291
only
$291
$215
only
$215
$417
only
$417
$357
only
$357
$204
only
$204
Destination
Chicago
$204
only
$204
$528
only
$528
Mon, Sep 14
STN
London Stansted Airport
ORD
Chicago O'Hare Airport
41h 29m
Based on null reviews
Mon, Sep 14
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
26h 25m
Based on null reviews
Tue, Sep 15
LGW
London Gatwick Airport
ORD
Chicago O'Hare Airport
12h 00m
Based on null reviews
Mon, Sep 7
STN
London Stansted Airport
ORD
Chicago O'Hare Airport
38h 00m
Based on null reviews
Wed, Jul 29
LCY
London City
ORD
Chicago O'Hare Airport
13h 15m
Based on null reviews
Sun, Sep 13
LCY
London City
ORD
Chicago O'Hare Airport
22h 10m
Based on null reviews
Sun, Sep 13
STN
London Stansted Airport
ORD
Chicago O'Hare Airport
45h 43m
Based on null reviews
Mon, Sep 7
STN
London Stansted Airport
ORD
Chicago O'Hare Airport
25h 40m
Based on null reviews
Mon, Sep 14
LHR
London Heathrow Airport
MDW
Chicago Midway Airport
14h 30m
Based on null reviews
Mon, Sep 7
STN
London Stansted Airport
ORD
Chicago O'Hare Airport
25h 40m
Based on null reviews
Mon, Sep 7
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
26h 25m
Based on null reviews
Fri, Sep 11
LTN
London Luton Airport
ORD
Chicago O'Hare Airport
30h 15m
Based on null reviews
Mon, Sep 7
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
27h 30m
Based on null reviews
Wed, Sep 16
LTN
London Luton Airport
ORD
Chicago O'Hare Airport
28h 45m
Based on null reviews
Mon, Sep 14
LGW
London Gatwick Airport
ORD
Chicago O'Hare Airport
11h 20m
Based on null reviews
Mon, Sep 14
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
27h 30m
Based on null reviews
Sun, Sep 13
LTN
London Luton Airport
ORD
Chicago O'Hare Airport
56h 49m
Based on null reviews
Tue, Sep 15
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
11h 10m
Based on null reviews
Mon, Sep 7
LHR
London Heathrow Airport
ORD
Chicago O'Hare Airport
26h 25m
Based on null reviews
Wed, Jul 15
LCY
London City
ORD
Chicago O'Hare Airport
14h 10m
Based on null reviews
*
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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