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)?

Currently, KAYAK has observed decreased prices for several flights because of COVID-19. Unnecessary travel is not recommended at this time, and flights may be at risk of cancellation: please refer to local authorities both in London and in Illinois for any travel warnings, and please check the airline's cancellation policy and travel advisories before booking your trip. For more advice, please view our information page on what to know about coronavirus (COVID-19) and travel.

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

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

Airports

Origin

Destination

Multiple Airlines

Mon, Aug 31

25h 40m

Sat, Sep 19

20h 00m

$351

Trip: 20 days

Based on null reviews

TAP AIR PORTUGAL

Wed, Nov 4

25h 55m

Sun, Nov 8

14h 40m

$376

Trip: 5 days

Based on null reviews

SWISS

Wed, Sep 23

12h 30m

Tue, Sep 29

11h 15m

$379

Trip: 7 days

Based on null reviews

Austrian Airlines

Wed, Sep 23

13h 45m

Tue, Sep 29

8h 05m

$385

Trip: 7 days

Based on null reviews

Lufthansa

Tue, Nov 10

11h 15m

Tue, Nov 17

11h 15m

$395

Trip: 8 days

Based on null reviews

Brussels Airlines

Tue, Sep 29

11h 15m

Thu, Oct 29

8h 00m

$409

Trip: 31 days

Based on null reviews

Finnair

Wed, Oct 14

8h 40m

Wed, Nov 18

7h 40m

$410

Trip: 36 days

Based on null reviews

KLM

Wed, Oct 14

12h 56m

Thu, Nov 19

10h 35m

$448

Trip: 37 days

Based on null reviews

Virgin Atlantic

Wed, Sep 16

16h 55m

Mon, Sep 21

15h 00m

$455

Trip: 6 days

Based on null reviews

Delta

Mon, Sep 28

14h 56m

Tue, Nov 3

14h 30m

$457

Trip: 37 days

Based on null reviews

British Airways

Wed, Sep 16

12h 40m

Wed, Sep 30

13h 30m

$505

Trip: 15 days

Based on null reviews

Aer Lingus

Thu, Oct 8

13h 15m

Mon, Oct 12

12h 25m

$539

Trip: 5 days

Based on null reviews

Multiple Airlines

Wed, Sep 16

25h 40m

Thu, Sep 24

20h 00m

$363

Trip: 9 days

Based on null reviews

TAP AIR PORTUGAL

Mon, Nov 16

27h 50m

Sun, Nov 29

17h 45m

$377

Trip: 14 days

Based on null reviews

Austrian Airlines

Wed, Oct 14

13h 45m

Wed, Nov 18

14h 45m

$401

Trip: 36 days

Based on null reviews

Multiple Airlines

Wed, Sep 2

28h 45m

Sat, Sep 19

21h 50m

$365

Trip: 18 days

Based on null reviews

SWISS

Sat, Sep 5

23h 40m

Sun, Sep 13

11h 15m

$402

Trip: 9 days

Based on null reviews

Lufthansa

Mon, Sep 21

11h 15m

Thu, Oct 1

7h 50m

$403

Trip: 11 days

Based on null reviews

TAP AIR PORTUGAL

Sat, Nov 21

24h 30m

Tue, Dec 1

14h 40m

$381

Trip: 11 days

Based on null reviews

Austrian Airlines

Sun, Sep 20

27h 30m

Sun, Sep 27

7h 50m

$404

Trip: 8 days

Based on null reviews

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

Airports

Origin

Destination

Multiple Airlines

Mon, Sep 14

41h 29m

$204

Based on null reviews

TAP AIR PORTUGAL

Mon, Sep 14

26h 25m

$291

Based on null reviews

British Airways

Tue, Sep 15

12h 00m

$357

Based on null reviews

Multiple Airlines

Mon, Sep 7

38h 00m

$205

Based on null reviews

Aer Lingus

Wed, Jul 29

13h 15m

$417

Based on null reviews

SWISS

Sun, Sep 13

22h 10m

$432

Based on null reviews

Multiple Airlines

Sun, Sep 13

45h 43m

$206

Based on null reviews

Multiple Airlines

Mon, Sep 7

25h 40m

$207

Based on null reviews

Virgin Atlantic

Mon, Sep 14

14h 30m

$528

Based on null reviews

Multiple Airlines

Mon, Sep 7

25h 40m

$210

Based on null reviews

TAP AIR PORTUGAL

Mon, Sep 7

26h 25m

$292

Based on null reviews

Multiple Airlines

Fri, Sep 11

30h 15m

$215

Based on null reviews

TAP AIR PORTUGAL

Mon, Sep 7

27h 30m

$294

Based on null reviews

Multiple Airlines

Wed, Sep 16

28h 45m

$219

Based on null reviews

British Airways

Mon, Sep 14

11h 20m

$361

Based on null reviews

TAP AIR PORTUGAL

Mon, Sep 14

27h 30m

$303

Based on null reviews

Multiple Airlines

Sun, Sep 13

56h 49m

$220

Based on null reviews

British Airways

Tue, Sep 15

11h 10m

$364

Based on null reviews

TAP AIR PORTUGAL

Mon, Sep 7

26h 25m

$310

Based on null reviews

Aer Lingus

Wed, Jul 15

14h 10m

$421

Based on null reviews

Flights to Illinois

Return flight deals:

Illinois - London

Cabin classes:

$6598

First

$748

Business

$189

Prem Econ

$80

Economy

Browse origins:

$483

London City

$350

London Gatwick Airport

$352

London Heathrow Airport

$420

London Luton Airport

$578

London Southend

$386

London Stansted Airport

Browse destinations:

$350

Chicago

$2294

Marion

$1264

Moline

$708

Peoria

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

Find cheap flights from London to Illinois

Good to know

Low season

High season

Average price of a round-trip

Good deal for a round-trip

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

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

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

Flights to Illinois

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