What is the cheapest airline that flies from London Gatwick to Illinois?

Iberia, British Airways, and Finnair are the most popular carriers operating from London Gatwick to Illinois

How many operators does momondo search for flights from London Gatwick Airport to Illinois?

There are 2 operators available for flights from London Gatwick Airport to Illinois as of December 2025.

How old do you have to be to fly from London Gatwick Airport to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Gatwick Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£268 Cheap Flights from London Gatwick Airport to Illinois in 2025/26

1 adult

0 bags

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from London Gatwick Airport to Illinois

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

14:00 - 23:33

LGW

STL

15h 33m1 stop

10:16 - 10:00

STL

LGW

17h 44m1 stop

£351Multiple Airlines

Thu, 22 Jan - Mon, 26 Jan

14:00 - 23:33

LGW

STL

15h 33m1 stop

11:18 - 10:00

STL

LGW

16h 42m1 stop

£381Multiple Airlines

Fri, 30 Jan - Fri, 6 Feb

14:00 - 23:33

LGW

STL

15h 33m1 stop

11:18 - 10:00

STL

LGW

16h 42m1 stop

£413Multiple Airlines

Fri, 30 Jan - Fri, 6 Feb

14:00 - 06:51

LGW

STL

22h 51m2 stops

10:16 - 10:00

STL

LGW

17h 44m1 stop

£416Multiple Airlines

Thu, 22 Jan - Mon, 26 Jan

14:00 - 23:33

LGW

STL

15h 33m1 stop

11:18 - 10:00

STL

LGW

16h 42m1 stop

£424Multiple Airlines

Mon, 2 Feb - Fri, 6 Feb

14:00 - 06:51

LGW

STL

22h 51m2 stops

11:18 - 10:00

STL

LGW

16h 42m1 stop

£440Multiple Airlines

Fri, 30 Jan - Fri, 6 Feb

11:55 - 17:20

LGW

ORD

11h 25m1 stop

18:30 - 10:55

ORD

LGW

10h 25m1 stop

£456Icelandair

Fri, 30 Jan - Fri, 20 Feb

20:40 - 21:29

LGW

CMI

30h 49m2 stops

15:02 - 20:00

CMI

LGW

22h 58m2 stops

£728British Airways

Tue, 21 Apr - Thu, 21 May

11:30 - 21:29

LGW

CMI

15h 59m2 stops

15:02 - 20:00

CMI

LGW

22h 58m2 stops

£777Iberia

Tue, 21 Apr - Thu, 21 May

10:35 - 20:31

LGW

STL

15h 56m2 stops

14:18 - 09:15

STL

LGW

12h 57m2 stops

£931WestJet

Thu, 4 Jun - Mon, 8 Jun

Icelandair flights from London Gatwick Airport to Illinois

Our best Icelandair deals on London Gatwick Airport to Illinois flight tickets

Icelandair

7 May

LGW13:00London Gatwick

11h 15m

1 stop

ORD18:15Chicago O'Hare Intl

11 May

ORD19:25Chicago O'Hare Intl

10h 20m

1 stop

LGW11:45London Gatwick

£464

Find similar

Icelandair

18 Feb

LGW11:55London Gatwick

11h 25m

1 stop

ORD17:20Chicago O'Hare Intl

18 Mar

ORD19:30Chicago O'Hare Intl

10h 25m

1 stop

LGW10:55London Gatwick

£465

Find similar

Icelandair

18 Feb

LGW11:55London Gatwick

11h 25m

1 stop

ORD17:20Chicago O'Hare Intl

16 Mar

ORD19:30Chicago O'Hare Intl

10h 25m

1 stop

LGW10:55London Gatwick

£466

Find similar

Iberia flights from London Gatwick Airport to Illinois

Our best Iberia deals on London Gatwick Airport to Illinois flight tickets

Iberia

16 Feb

LGW19:40London Gatwick

25h 15m

1 stop

ORD14:55Chicago O'Hare Intl

23 Feb

ORD17:40Chicago O'Hare Intl

19h 20m

1 stop

LGW19:00London Gatwick

£471

Find similar

Iberia

12 Feb

LGW19:40London Gatwick

25h 15m

1 stop

ORD14:55Chicago O'Hare Intl

19 Feb

ORD17:40Chicago O'Hare Intl

19h 20m

1 stop

LGW19:00London Gatwick

£490

Find similar

Iberia

21 Feb

LGW19:40London Gatwick

25h 15m

1 stop

ORD14:55Chicago O'Hare Intl

19 Mar

ORD18:40Chicago O'Hare Intl

19h 20m

1 stop

LGW19:00London Gatwick

£502

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from London Gatwick Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 22/1

14:00-23:33

1 stop15h 33m

Lambert-St Louis

Mon 26/1

10:16-10:00

1 stop17h 44m

£351

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Fri 30/1

14:00-23:33

1 stop15h 33m

Lambert-St Louis

Fri 6/2

11:18-10:00

1 stop16h 42m

£381

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Fri 30/1

14:00-23:33

1 stop15h 33m

Lambert-St Louis

Fri 6/2

11:18-10:00

1 stop16h 42m

£413

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 22/1

14:00-06:51

2 stops22h 51m

Lambert-St Louis

Mon 26/1

10:16-10:00

1 stop17h 44m

£416

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Mon 2/2

14:00-23:33

1 stop15h 33m

Lambert-St Louis

Fri 6/2

11:18-10:00

1 stop16h 42m

£424

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Fri 30/1

14:00-06:51

2 stops22h 51m

Lambert-St Louis

Fri 6/2

11:18-10:00

1 stop16h 42m

£440

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 30/1

11:55-17:20

1 stop11h 25m

Chicago O'Hare Intl

Fri 20/2

18:30-10:55

1 stop10h 25m

£456

LondonChampaign

LGW - CMI

LGWCMI

London Gatwick

Tue 21/4

20:40-21:29

2 stops30h 49m

Champaign University-Willard

Thu 21/5

15:02-20:00

2 stops22h 58m

£728

LondonChampaign

LGW - CMI

LGWCMI

London Gatwick

Tue 21/4

11:30-21:29

2 stops15h 59m

Champaign University-Willard

Thu 21/5

15:02-20:00

2 stops22h 58m

£777

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 4/6

10:35-20:31

2 stops15h 56m

Lambert-St Louis

Mon 8/6

14:18-09:15

2 stops12h 57m

£931

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London Gatwick Airport to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Illinois?

The month of November is, on average, the cheapest month to fly to Illinois from London Gatwick Airport, with most prices found around £331. If you aren’t able to travel to Illinois during the month of November, then flying in February is also cheap. Prices for this month can be found on momondo for an average of £373.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart on your flight to Illinois is on a Wednesday when prices can be found for as low as £476. This is often the case because there is less demand to fly during this day of the week. Flights from London Gatwick Airport to Illinois on a Friday will generally be more expensive and average around £543. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our data shows that the cheapest London Gatwick Airport to Illinois flights are usually those with departure times in the morning. Our users have found flights to Illinois in the morning for as low as £503. In the evening is when there is more demand to fly to Illinois, so prices are often more expensive at around £616 per ticket.

Cheap London Gatwick Airport to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Gatwick Airport to Illinois

Fastest flight time	11h 15m
Direct flights	None

The fastest flight from London Gatwick Airport to Illinois takes 11h 15m

There are no direct flights from London Gatwick Airport to Illinois. There are no popular flight routes from London Gatwick Airport to Illinois.

Search flight deals

When did momondo last update prices for flights from London Gatwick Airport to Illinois?
Prices for flights from London Gatwick Airport to Illinois refresh daily.
How many operators does momondo search for flights from London Gatwick Airport to Illinois?
There are 2 operators available for flights from London Gatwick Airport to Illinois as of December 2025.
How old do you have to be to fly from London Gatwick Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Gatwick Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from London Gatwick Airport to Illinois

Compare and see reviews for airlines that fly from London Gatwick Airport to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom £315	Free Cancellation	Rating 7.0 591 reviews		Search Icelandair flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Illinois?

It is quick and easy to find London to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

Can I find flights from London to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Illinois?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Illinois.

I’m not ready to book a flight from London to Illinois right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of London to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.