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 17h 08m. Fly via Virgin Atlantic, TAP AIR PORTUGAL, or Iberia 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 - Chicago Midway or London Gatwick - Lambert-St Louis.

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.

£313+ 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 6 September 2026.

Wed 16/915:40 -

1 stop11h 45m

Sun 15/1118:30 -

1 stop10h 25m

Deal found 6/9£525

Thu 24/909:25 -

1 stop12h 30m

Tue 29/914:40 -

1 stop11h 45m

Deal found 5/9£526

Fri 25/909:40 -

2 stops33h 41m

Mon 28/914:15 -

1 stop14h 30m

Deal found 3/9£527

Thu 10/908:40 -

1 stop16h 35m

Wed 23/921:00 -

1 stop14h 50m

Deal found 3/9£529

Fri 25/909:40 -

2 stops34h 55m

Thu 1/1011:45 -

2 stops16h 05m

Deal found 4/9£530

Thu 1/1013:10 -

1 stop12h 05m

Thu 15/1015:45 -

1 stop11h 40m

Deal found 6/9£530

Wed 16/915:40 -

1 stop11h 45m

Thu 5/1118:30 -

1 stop10h 25m

Deal found 4/9£531

Mon 5/1008:40 -

1 stop11h 20m

Mon 12/1015:45 -

1 stop10h 10m

Deal found 5/9£532

Fri 2/1009:40 -

2 stops17h 05m

Sun 4/1009:55 -

1 stop18h 50m

Deal found 3/9£533

Wed 14/1008:25 -

2 stops34h 10m

Wed 28/1019:50 -

3 stops31h 15m

Deal found 6/9£534

Fri 2/1011:35 -

2 stops29h 25m

Sun 4/1011:45 -

2 stops14h 10m

Deal found 3/9£541

Sun 4/1009:40 -

2 stops34h 55m

Sun 11/1011:45 -

2 stops14h 10m

Deal found 6/9£571

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 6 September 2026.

Mon 21/911:35 -

2 stops33h 00m

Fri 2/1011:45 -

2 stops16h 05m

Deal found 5/9£595

Tue 6/1010:35 -

2 stops17h 08m

Mon 19/1010:24 -

2 stops17h 16m

Deal found 3/9£598

Tue 22/916:25 -

1 stop29h 35m

Wed 21/1018:00 -

2 stops20h 30m

Deal found 5/9£623

Wed 16/911:30 -

2 stops18h 13m

Wed 23/911:01 -

2 stops26h 59m

Deal found 1/9£649

Tue 29/909:25 -

1 stop12h 30m

Fri 29/116:10 -

2 stops16h 15m

Deal found 4/9£675

Mon 12/1010:25 -

2 stops16h 26m

Tue 20/1012:28 -

2 stops14h 57m

Deal found 6/9£690

Wed 21/1017:35 -

2 stops33h 46m

Thu 12/1107:30 -

2 stops51h 00m

Deal found 3/9£1,059

Thu 1/1017:00 -

1 stop28h 10m

Tue 13/1007:25 -

2 stops20h 00m

Deal found 1/9£607

Sat 3/1011:35 -

2 stops33h 00m

Sat 10/1011:45 -

2 stops16h 05m

Deal found 5/9£621

Tue 20/1021:15 -

2 stops45h 25m

Wed 4/1119:00 -

1 stop14h 05m

Deal found 6/9£666

Wed 30/909:25 -

1 stop12h 30m

Fri 29/116:10 -

2 stops16h 15m

Deal found 4/9£686

Mon 28/909:40 -

1 stop31h 20m

Thu 1/1015:20 -

1 stop13h 25m

Deal found 3/9£624

Mon 21/917:00 -

2 stops22h 27m

Mon 2/1113:55 -

2 stops19h 50m

Deal found 6/9£650

Mon 12/1009:40 -

1 stop31h 20m

Sat 17/1015:20 -

1 stop13h 25m

Deal found 5/9£644

Fri 20/1110:00 -

2 stops18h 36m

Wed 2/1218:00 -

2 stops15h 45m

Deal found 5/9£658

Mon 5/1010:25 -

2 stops17h 24m

Mon 12/1010:07 -

2 stops17h 33m

Deal found 3/9£829

Sun 20/914:00 -

1 stop32h 34m

Tue 6/1012:17 -

2 stops39h 43m

Deal found 1/9£666

Mon 5/1010:25 -

2 stops17h 24m

Sun 11/1010:07 -

2 stops17h 18m

Deal found 3/9£860

Sun 1/1121:25 -

3 stops28h 04m

Sun 8/1120:10 -

1 stop13h 35m

Deal found 3/9£686

Tue 20/1010:35 -

2 stops17h 32m

Tue 27/1018:05 -

2 stops16h 40m

Deal found 5/9£860

Tue 17/1121:20 -

2 stops24h 10m

Tue 8/1217:46 -

2 stops33h 39m

Deal found 1/9£720

Sat 19/912:40 -

1 stop28h 20m

Sat 26/911:45 -

1 stop14h 10m

Deal found 4/9£800

Wed 30/915:40 -

2 stops37h 35m

Wed 7/1015:00 -

2 stops17h 40m

Deal found 2/9£806

Tue 16/211:55 -

2 stops16h 25m

Tue 2/306:30 -

2 stops22h 25m

Deal found 4/9£817

Mon 11/111:55 -

2 stops15h 25m

Sun 17/113:25 -

2 stops15h 30m

Deal found 2/9£826

Wed 2/1211:55 -

2 stops15h 30m

Sun 6/1215:10 -

2 stops13h 45m

Deal found 2/9£835

Wed 28/1011:55 -

2 stops15h 35m

Tue 3/1111:20 -

2 stops17h 35m

Deal found 6/9£844

Thu 1/1015:40 -

2 stops37h 35m

Thu 8/1016:05 -

2 stops16h 35m

Deal found 3/9£896

Sat 14/1119:40 -

2 stops28h 38m

Tue 17/1112:13 -

2 stops24h 47m

Deal found 2/9£2,929

Thu 1/1015:40 -

2 stops38h 05m

Sat 10/1013:20 -

2 stops19h 15m

Deal found 5/9£1,029

Find flight deals from Gatwick to Illinois

Round-trip from	£526
One-way from	£313
Popular in	August
Cheapest in	February
Average price	£589

SWISS
24/9-29/9
2 total stops
24h 15m total
London to Illinois

Search Deals

6/11-31/12
1 total stop
16h 41m total
London to Illinois

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£63 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 September 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

LondonSt. Louis

LGW London Gatwick - STL Lambert-St Louis

LGWSTL

London Gatwick

Fri 6/11

12:35-23:16

1 stop16h 41m

Lambert-St Louis

Wed 31/12

00:00-07:00

Nonstop0h 00m

£313

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Fri 20/11

12:35-12:24

1 stop29h 49m

Chicago Midway

Wed 31/12

00:00-07:00

Nonstop0h 00m

£374

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Thu 12/11

11:00-17:47

2 stops36h 47m

Chicago Midway

Wed 31/12

00:00-07:00

Nonstop0h 00m

£386

LondonSt. Louis

LGW London Gatwick - STL Lambert-St Louis

LGWSTL

London Gatwick

Fri 9/10

14:00-23:13

1 stop15h 13m

Lambert-St Louis

Wed 31/12

00:00-07:00

Nonstop0h 00m

£389

LondonSt. Louis

LGW London Gatwick - STL Lambert-St Louis

LGWSTL

London Gatwick

Mon 21/9

09:40-13:31

3 stops33h 51m

Lambert-St Louis

Wed 31/12

00:00-07:00

Nonstop0h 00m

£401

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Tue 1/12

08:35-18:15

2 stops15h 40m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£419

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Fri 2/10

14:00-22:59

1 stop14h 59m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£422

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Tue 26/1

10:00-21:33

2 stops17h 33m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£426

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Mon 14/9

11:35-11:00

2 stops29h 25m

Chicago Midway

Wed 31/12

00:00-07:00

Nonstop0h 00m

£426

Fastest return journey

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Sun 18/10

09:05-15:55

1 stop12h 50m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£437

Flights are sorted by cheapest return flights first.

Deals found on 3/9

Showing 1-10 of 60 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-STL

LGW-ORD

LGW-MDW

LGW-EVV

LGW-CMI

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-STL

LGW-ORD

LGW-MDW

LGW-EVV

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 £470). Flying from London Gatwick Airport to Illinois in August is currently the most expensive (average of £1,687). 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.

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

741 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

741 reviews

Icelandair

6.9

Okay

741 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 17h 08m. Fly via Virgin Atlantic, TAP AIR PORTUGAL, or Iberia 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 - Chicago Midway or London Gatwick - Lambert-St Louis.
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 £470). Flying from London Gatwick Airport to Illinois in August is currently the most expensive (average of £1,687). 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£352	Average£509	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights

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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?

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Cheap flights from London Gatwick Airport to Illinois from £313

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/11. 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 6 September 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 6 September 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 6 September 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 6 September 2026.

Last-minute flights from Gatwick to IllinoisDiscover last-minute flight deals from Gatwick to Illinois. Data last updated 6 September 2026 and is based on user searches.

Discover last-minute flight deals from Gatwick to Illinois. Data last updated 6 September 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 6 September 2026.

Search for one-way flight options from Gatwick to Illinois. Find affordable one-way fares based on user searches. Data last updated 6 September 2026.

Find flight deals from Gatwick to Illinois

Round-trip from

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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?

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 6 September 2026.

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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 6 September 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 6 September 2026.

Last-minute flights from Gatwick to Illinois
Discover last-minute flight deals from Gatwick to Illinois. Data last updated 6 September 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 6 September 2026.