How long is the flight from London Gatwick Airport to Illinois?

There are many flights that can get you from London Gatwick Airport to Illinois in 12h 15m. Fly via TAP AIR PORTUGAL, KLM, or Virgin Atlantic to get the fastest option. The distance between London Gatwick Airport and Illinois is about 3960 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What are the most popular routes from London Gatwick Airport to Illinois?

The most popular route from London Gatwick Airport to Illinois is London Gatwick - Chicago O'Hare Intl. You may also consider London Gatwick - Lambert-St Louis or London Gatwick - Chicago Midway.

What is the cheapest time of day to fly from LGW to IL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Gatwick Airport to Illinois as you normally would.

Can I find deals for flights from Gatwick to Illinois that include hotel bookings?

Yes. In addition to deals on Gatwick to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Gatwick to Illinois?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Gatwick to Illinois.

Can I find deals for business class flights from Gatwick to Illinois?

Yes. Cheapflights offers flight deals from Gatwick to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£360+ Cheap Flights from London Gatwick Airport to Illinois

Cheap flight deals from Gatwick to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Gatwick to Illinois
Explore the most affordable flight options available from Gatwick to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 October 2026.

Tue 17/1108:50 -

2 stops14h 30m

Tue 24/1118:30 -

3 stops17h 20m

Deal found 4/10£537

Mon 2/1119:30 -

2 stops27h 50m

Mon 16/1118:30 -

3 stops35h 50m

Deal found 5/10£539

Sat 7/1113:00 -

2 stops33h 45m

Sat 14/1119:10 -

2 stops18h 45m

Deal found 5/10£540

Sun 22/1116:45 -

3 stops30h 35m

Sun 29/1118:30 -

2 stops20h 35m

Deal found 4/10£542

Tue 20/1019:55 -

2 stops26h 15m

Sat 7/1119:10 -

2 stops16h 20m

Deal found 5/10£543

Mon 16/1113:00 -

2 stops33h 45m

Mon 23/1119:10 -

2 stops15h 10m

Deal found 4/10£543

Fri 16/1015:40 -

1 stop11h 45m

Sun 3/118:30 -

1 stop10h 25m

Deal found 6/10£546

Fri 16/1015:40 -

1 stop11h 45m

Mon 4/118:30 -

1 stop10h 25m

Deal found 6/10£547

Thu 22/1008:40 -

2 stops15h 35m

Sun 1/1118:30 -

2 stops15h 40m

Deal found 4/10£549

Thu 29/1007:00 -

2 stops16h 20m

Wed 11/1118:30 -

3 stops32h 05m

Deal found 8/10£550

Mon 9/1120:55 -

3 stops25h 50m

Mon 23/1119:10 -

2 stops15h 10m

Deal found 8/10£552

Thu 26/1110:00 -

3 stops35h 30m

Sun 29/1120:10 -

2 stops18h 55m

Deal found 5/10£552

Best flights from Gatwick to Illinois
Discover carefully curated flight deals from Gatwick to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 October 2026.

Tue 30/316:25 -

1 stop29h 35m

Sat 10/418:15 -

2 stops20h 10m

Deal found 4/10£549

Wed 4/1110:00 -

1 stop12h 15m

Mon 9/1118:25 -

1 stop15h 20m

Deal found 5/10£668

Mon 9/1110:00 -

2 stops19h 54m

Mon 23/1106:23 -

2 stops20h 37m

Deal found 8/10£673

Wed 18/1110:00 -

2 stops18h 54m

Mon 23/1112:30 -

2 stops14h 30m

Deal found 5/10£674

Tue 17/1110:40 -

1 stop34h 50m

Tue 1/1217:46 -

2 stops33h 39m

Deal found 4/10£677

Thu 19/1108:30 -

1 stop13h 45m

Thu 26/1121:35 -

2 stops14h 15m

Deal found 5/10£680

Fri 30/1011:55 -

1 stop11h 25m

Sun 8/1118:30 -

1 stop10h 25m

Deal found 5/10£728

Tue 15/1221:20 -

2 stops24h 10m

Wed 30/1219:00 -

1 stop32h 50m

Deal found 7/10£614

Wed 18/1110:00 -

2 stops18h 54m

Sun 22/1113:31 -

2 stops20h 14m

Deal found 5/10£704

Wed 28/1010:00 -

1 stop12h 15m

Wed 4/1107:25 -

2 stops19h 35m

Deal found 5/10£734

Fri 30/1018:40 -

1 stop24h 00m

Tue 3/1121:35 -

2 stops14h 15m

Deal found 7/10£776

Wed 4/1110:00 -

2 stops18h 33m

Mon 9/1113:05 -

2 stops20h 40m

Deal found 5/10£706

Wed 30/1210:40 -

3 stops40h 14m

Wed 6/119:00 -

1 stop14h 05m

Deal found 4/10£827

Sat 21/1110:00 -

2 stops18h 54m

Sat 28/1113:31 -

2 stops20h 14m

Deal found 7/10£767

Fri 20/1110:00 -

2 stops18h 54m

Fri 27/1112:05 -

2 stops21h 40m

Deal found 6/10£829

Sun 20/1211:55 -

2 stops17h 15m

Sun 3/114:25 -

2 stops14h 30m

Deal found 4/10£1,228

Sun 20/1212:35 -

1 stop36h 27m

Wed 30/1220:07 -

1 stop28h 43m

Deal found 7/10£1,271

Sat 19/1211:55 -

2 stops17h 05m

Sat 2/115:10 -

2 stops13h 45m

Deal found 4/10£1,517

Sun 20/1211:55 -

2 stops17h 15m

Sat 2/115:40 -

2 stops13h 15m

Deal found 7/10£1,674

Find flight deals from Gatwick to Illinois

Round-trip from	£537
One-way from	£360
Popular in	August
Cheapest in	February
Average price	£630

17/11-24/11
5 total stops
31h 50m total
London to Illinois

Search Deals

21/12-31/12
3 total stops
36h 25m total
London to Illinois

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£65 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Cheapflights 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

Cheapest return flight

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Fri 30/10

12:35-08:46

1 stop25h 11m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£413

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Sat 5/12

10:00-22:54

2 stops18h 54m

Chicago Midway

Wed 31/12

00:00-07:00

Nonstop0h 00m

£474

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Sat 21/11

16:35-15:30

1 stop28h 55m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£484

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Sun 25/10

12:35-07:31

1 stop23h 56m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£510

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Wed 21/10

06:10-11:00

3 stops34h 50m

Chicago Midway

Wed 31/12

00:00-07:00

Nonstop0h 00m

£518

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Thu 15/10

14:00-07:31

1 stop23h 31m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£539

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Tue 30/3

16:25-16:00

1 stop29h 35m

Chicago O'Hare Intl

Sat 10/4

18:15-20:25

2 stops20h 10m

£549

Fastest return journey

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Wed 11/11

11:55-17:20

1 stop11h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£568

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Sun 3/1

21:20-23:46

3 stops56h 26m

Chicago Midway

Wed 31/12

00:00-07:00

Nonstop0h 00m

£572

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Wed 4/11

09:50-23:47

2 stops19h 57m

Chicago Midway

Wed 31/12

00:00-07:00

Nonstop0h 00m

£573

Flights are sorted by cheapest return flights first.

Deals found on 5/10

Showing 1-10 of 41 resultsSorted by cheapest first

...

Best time to book a flight from Gatwick to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Gatwick with our price prediction graph.

LGW-ORD

LGW-MDW

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Gatwick Airport to Illinois

LGW-USIL

LGW-ORD

LGW-MDW

What is the cheapest month to book a flight from London Gatwick Airport to Illinois?

Currently, May is the cheapest month in which you can book a flight from London Gatwick Airport to Illinois (average of £461). Flying from London Gatwick Airport to Illinois in August is currently the most expensive (average of £1,726). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from London Gatwick Airport to Illinois?

Airfare is typical for this route at the moment.

London Gatwick Airport to Illinois flights typically cost between £441 and £688 in November.
The cheapest return price found within the last 5 days was £537 on Multiple Airlines (17 Nov–24 Nov).

Reviews of airlines servicing Illinois

See what other customers who have flown with Icelandair from London Gatwick Airport to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Icelandair

6.9

Okay

758 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Victoria,Sept 2026

KEF - EWR

Icelandair was excellent. Kayak business not so much. As mentioned in our comment through pilot, there were hidden fees when we bought the tickets.

Icelandair

6.9

Okay

758 reviews

Icelandair

6.9

Okay

758 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Victoria,Sept 2026

KEF - EWR

Icelandair was excellent. Kayak business not so much. As mentioned in our comment through pilot, there were hidden fees when we bought the tickets.

Related info for your journey

How long is the flight from London Gatwick Airport to Illinois?
There are many flights that can get you from London Gatwick Airport to Illinois in 12h 15m. Fly via TAP AIR PORTUGAL, KLM, or Virgin Atlantic to get the fastest option. The distance between London Gatwick Airport and Illinois is about 3960 mi. This flight may include one or multiple stops.
What are the most popular routes from London Gatwick Airport to Illinois?
The most popular route from London Gatwick Airport to Illinois is London Gatwick - Chicago O'Hare Intl. You may also consider London Gatwick - Lambert-St Louis or London Gatwick - Chicago Midway.
Can I find deals for flights from Gatwick to Illinois that include hotel bookings?
Yes. In addition to deals on Gatwick to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Gatwick to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Gatwick to Illinois.
Can I find deals for business class flights from Gatwick to Illinois?
Yes. Cheapflights offers flight deals from Gatwick to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Gatwick Airport to Illinois?
Currently, May is the cheapest month in which you can book a flight from London Gatwick Airport to Illinois (average of £461). Flying from London Gatwick Airport to Illinois in August is currently the most expensive (average of £1,726). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Gatwick to Illinois

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Top airline flying from Gatwick to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£360	Average£521	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights

Fly with Cheapflights

How does Cheapflights help users find flights from Gatwick to Illinois?

When you search for this flight from Gatwick to Illinois, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Gatwick to Illinois?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Gatwick to Illinois for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Gatwick to Illinois with no change fees?

Certainly. Search results for flights to Illinois from Gatwick shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Gatwick to Illinois become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from London Gatwick Airport to Illinois from £360

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Gatwick to Illinois

Cheapest flights from Gatwick to IllinoisExplore the most affordable flight options available from Gatwick to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 October 2026.

Explore the most affordable flight options available from Gatwick to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 October 2026.

Best flights from Gatwick to IllinoisDiscover carefully curated flight deals from Gatwick to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 October 2026.

Discover carefully curated flight deals from Gatwick to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 October 2026.

Last-minute flights from Gatwick to IllinoisDiscover last-minute flight deals from Gatwick to Illinois. Data last updated 9 October 2026 and is based on user searches.

Discover last-minute flight deals from Gatwick to Illinois. Data last updated 9 October 2026 and is based on user searches.

One-way flights from Gatwick to IllinoisSearch for one-way flight options from Gatwick to Illinois. Find affordable one-way fares based on user searches. Data last updated 9 October 2026.

Search for one-way flight options from Gatwick to Illinois. Find affordable one-way fares based on user searches. Data last updated 9 October 2026.

Find flight deals from Gatwick to Illinois

Round-trip from

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Popular in

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Cheapflights Fare Finder

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

Best time to book a flight from Gatwick to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Gatwick with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from London Gatwick Airport to Illinois?

How much does it cost for a return flight from London Gatwick Airport to Illinois?

Airfare is typical for this route at the moment.

London Gatwick Airport to Illinois flights typically cost between £441 and £688 in November.The cheapest return price found within the last 5 days was £537 on Multiple Airlines (17 Nov–24 Nov).

Reviews of airlines servicing Illinois

See what other customers who have flown with Icelandair from London Gatwick Airport to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

How long is the flight from London Gatwick Airport to Illinois?

What are the most popular routes from London Gatwick Airport to Illinois?

Can I find deals for flights from Gatwick to Illinois that include hotel bookings?

How can I find direct flights from Gatwick to Illinois?

Can I find deals for business class flights from Gatwick to Illinois?

What is the cheapest month to book a flight from London Gatwick Airport to Illinois?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Gatwick to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Illinois by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Gatwick to Illinois by cabin class

Find flights from Gatwick to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Gatwick and Illinois flights

Browse other Gatwick and Illinois flight options. Last updated on 9 October 2026.

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Top airline flying from Gatwick to Illinois

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How does Cheapflights help users find flights from Gatwick to Illinois?

Why should you use Cheapflights to find cheap flight tickets from Gatwick to Illinois?

Can Cheapflights find flights from Gatwick to Illinois with no change fees?

Can Cheapflights notify me if prices for flights from Gatwick to Illinois become cheaper?

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Cheapest flights from Gatwick to Illinois
Explore the most affordable flight options available from Gatwick to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 October 2026.

Best flights from Gatwick to Illinois
Discover carefully curated flight deals from Gatwick to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 October 2026.

Last-minute flights from Gatwick to Illinois
Discover last-minute flight deals from Gatwick to Illinois. Data last updated 9 October 2026 and is based on user searches.

One-way flights from Gatwick to Illinois
Search for one-way flight options from Gatwick to Illinois. Find affordable one-way fares based on user searches. Data last updated 9 October 2026.

London Gatwick Airport to Illinois flights typically cost between £441 and £688 in November.
The cheapest return price found within the last 5 days was £537 on Multiple Airlines (17 Nov–24 Nov).