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 11h 45m. Fly via Icelandair, TAP AIR PORTUGAL, 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 - 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.

£246+ 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 21 August 2026.

Wed 30/916:25 -

1 stop26h 15m

Sun 4/1018:00 -

1 stop15h 10m

Deal found 18/8£465

Fri 4/915:35 -

2 stops32h 40m

Tue 8/919:25 -

2 stops14h 55m

Deal found 18/8£466

Mon 12/1009:45 -

1 stop15h 30m

Mon 19/1021:00 -

1 stop17h 55m

Deal found 21/8£468

Thu 15/1009:45 -

1 stop15h 30m

Mon 19/1021:00 -

1 stop17h 55m

Deal found 19/8£470

Wed 2/922:00 -

1 stop22h 00m

Tue 22/921:00 -

1 stop12h 10m

Deal found 21/8£470

Wed 23/916:25 -

1 stop26h 15m

Wed 21/1018:00 -

1 stop33h 45m

Deal found 18/8£471

Mon 14/908:40 -

1 stop16h 35m

Mon 28/921:00 -

1 stop13h 55m

Deal found 17/8£472

Wed 7/1010:35 -

1 stop32h 05m

Sun 18/1018:00 -

1 stop15h 10m

Deal found 18/8£473

Fri 4/914:00 -

1 stop15h 08m

Sat 3/1015:50 -

1 stop36h 10m

Deal found 16/8£473

Wed 7/1017:05 -

2 stops25h 35m

Sun 18/1018:00 -

3 stops33h 30m

Deal found 18/8£474

Sat 24/1013:40 -

2 stops34h 05m

Sat 31/1020:15 -

2 stops18h 40m

Deal found 19/8£475

Tue 15/908:50 -

1 stop16h 25m

Tue 22/915:45 -

1 stop11h 35m

Deal found 18/8£476

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 21 August 2026.

Wed 9/915:40 -

1 stop11h 45m

Wed 23/919:25 -

1 stop13h 15m

Deal found 20/8£597

Sun 6/911:35 -

2 stops33h 00m

Mon 14/915:20 -

2 stops34h 35m

Deal found 19/8£599

Wed 7/1016:25 -

1 stop26h 15m

Wed 14/1018:00 -

2 stops35h 20m

Deal found 16/8£621

Wed 23/910:25 -

2 stops19h 34m

Tue 29/907:35 -

2 stops19h 50m

Deal found 19/8£647

Wed 14/1007:25 -

1 stop32h 15m

Wed 25/1120:15 -

1 stop20h 20m

Deal found 20/8£695

Wed 9/910:25 -

2 stops18h 19m

Mon 14/910:48 -

2 stops16h 52m

Deal found 21/8£713

Thu 19/1108:30 -

2 stops15h 45m

Sun 22/1121:35 -

2 stops14h 15m

Deal found 17/8£719

Wed 2/1219:40 -

2 stops28h 37m

Sun 6/1212:13 -

2 stops24h 47m

Deal found 16/8£912

Wed 16/911:35 -

2 stops33h 00m

Fri 18/911:45 -

2 stops14h 10m

Deal found 16/8£599

Tue 15/1210:40 -

1 stop34h 50m

Wed 30/1219:00 -

1 stop32h 50m

Deal found 18/8£632

Fri 4/911:35 -

2 stops33h 00m

Tue 22/911:45 -

2 stops16h 05m

Deal found 19/8£617

Sun 11/1015:40 -

1 stop11h 45m

Thu 26/1118:30 -

1 stop10h 25m

Deal found 20/8£687

Thu 22/1010:35 -

1 stop35h 25m

Sun 25/1021:10 -

1 stop13h 35m

Deal found 20/8£656

Sun 20/910:25 -

2 stops15h 33m

Tue 20/1012:28 -

2 stops14h 57m

Deal found 18/8£736

Sun 20/914:00 -

1 stop32h 34m

Sun 27/917:19 -

1 stop34h 41m

Deal found 21/8£618

Tue 15/916:25 -

1 stop29h 35m

Tue 22/910:59 -

3 stops27h 26m

Deal found 17/8£675

Sun 27/909:40 -

2 stops34h 55m

Sat 3/1015:20 -

1 stop13h 25m

Deal found 18/8£651

Thu 1/1010:25 -

2 stops17h 24m

Thu 8/1010:07 -

2 stops17h 18m

Deal found 17/8£860

Thu 17/912:40 -

1 stop31h 55m

Thu 24/915:20 -

2 stops17h 20m

Deal found 18/8£665

Wed 30/1209:35 -

2 stops28h 17m

Wed 6/119:00 -

1 stop14h 05m

Deal found 20/8£756

Wed 7/1020:40 -

2 stops27h 25m

Sat 17/1012:38 -

2 stops16h 12m

Deal found 20/8£1,054

Sun 18/1017:35 -

2 stops33h 46m

Wed 28/1007:30 -

2 stops28h 00m

Deal found 17/8£1,054

Wed 9/921:15 -

2 stops21h 25m

Wed 23/918:00 -

2 stops20h 30m

Deal found 17/8£773

Thu 1/1010:50 -

2 stops40h 31m

Thu 8/1008:00 -

2 stops43h 55m

Deal found 16/8£1,055

Sat 3/1015:40 -

2 stops38h 15m

Sat 10/1013:20 -

2 stops19h 15m

Deal found 19/8£796

Wed 28/1011:55 -

2 stops15h 30m

Tue 3/1111:20 -

2 stops17h 35m

Deal found 18/8£809

Mon 16/1111:55 -

2 stops16h 15m

Sun 6/1211:40 -

2 stops17h 15m

Deal found 19/8£812

Thu 1/1015:40 -

2 stops37h 35m

Sat 10/1013:20 -

2 stops19h 15m

Deal found 20/8£815

Wed 4/1111:55 -

2 stops15h 30m

Sun 15/1115:10 -

2 stops13h 45m

Deal found 20/8£822

Wed 2/1211:55 -

2 stops15h 30m

Sun 6/1215:10 -

2 stops13h 45m

Deal found 20/8£826

Find flight deals from Gatwick to Illinois

Round-trip from	£465
One-way from	£246
Popular in	July
Cheapest in	February
Average price	£699

TAP AIR PORTUGAL
30/9-4/10
2 total stops
41h 25m total
London to Illinois

Search Deals

14/11
3 total stops
50h 10m total
London to Illinois

Search Deals

Highest demand for flights based on searches. 16% potential increase in price (£82 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 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

Wed 9/9

15:40-21:25

1 stop11h 45m

Chicago O'Hare Intl

Wed 23/9

19:25-14:40

1 stop13h 15m

£597

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Sun 6/9

11:35-14:35

2 stops33h 00m

Chicago Midway

Mon 14/9

15:20-07:55

2 stops34h 35m

£599

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Wed 16/9

11:35-14:35

2 stops33h 00m

Chicago Midway

Fri 18/9

11:45-07:55

2 stops14h 10m

£599

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Fri 4/9

11:35-14:35

2 stops33h 00m

Chicago Midway

Tue 22/9

11:45-09:50

2 stops16h 05m

£617

LondonSt. Louis

LGW London Gatwick - STL Lambert-St Louis

LGWSTL

London Gatwick

Sun 20/9

14:00-16:34

1 stop32h 34m

Lambert-St Louis

Sun 27/9

17:19-10:00

1 stop34h 41m

£618

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Wed 7/10

16:25-12:40

1 stop26h 15m

Chicago O'Hare Intl

Wed 14/10

18:00-11:20

2 stops35h 20m

£621

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Tue 15/12

10:40-15:30

1 stop34h 50m

Chicago O'Hare Intl

Wed 30/12

19:00-09:50

1 stop32h 50m

£632

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Wed 23/9

10:25-23:59

2 stops19h 34m

Chicago O'Hare Intl

Tue 29/9

07:35-09:25

2 stops19h 50m

£647

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Sun 27/9

09:40-14:35

2 stops34h 55m

Chicago Midway

Sat 3/10

15:20-10:45

1 stop13h 25m

£651

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Thu 22/10

10:35-16:00

1 stop35h 25m

Chicago O'Hare Intl

Sun 25/10

21:10-15:45

1 stop13h 35m

£656

Flights are sorted by cheapest return flights first.

Deals found on 17/8

Showing 1-10 of 55 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-CMI

LGW-EVV

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-CMI

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 £466). Flying from London Gatwick Airport to Illinois in July is currently the most expensive (average of £859). 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

732 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Jul 2026

KEF - ORD

No food or snacks. You could buy them. You could also buy ear buds.

Icelandair

6.9

Okay

732 reviews

Icelandair

6.9

Okay

732 reviews

Check prices

Reviews

1 / 20

6.0

Good

Anonymous,Jul 2026

KEF - ORD

No food or snacks. You could buy them. You could also buy ear buds.

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 11h 45m. Fly via Icelandair, TAP AIR PORTUGAL, 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 - 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 £466). Flying from London Gatwick Airport to Illinois in July is currently the most expensive (average of £859). 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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Stansted to Las Vegas flights

Top airline flying from Gatwick to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£349	Average£502	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights

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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 £246

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/11. 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 21 August 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 21 August 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 21 August 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 21 August 2026.

Last-minute flights from Gatwick to IllinoisDiscover last-minute flight deals from Gatwick to Illinois. Data last updated 21 August 2026 and is based on user searches.

Discover last-minute flight deals from Gatwick to Illinois. Data last updated 21 August 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 21 August 2026.

Search for one-way flight options from Gatwick to Illinois. Find affordable one-way fares based on user searches. Data last updated 21 August 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 21 August 2026.

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Gatwick to Illinois flights

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Top airline flying from Gatwick to Illinois

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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 21 August 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 21 August 2026.

Last-minute flights from Gatwick to Illinois
Discover last-minute flight deals from Gatwick to Illinois. Data last updated 21 August 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 21 August 2026.