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 British Airways, Delta, 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.

£354+ 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 September 2026.

Mon 19/1012:40 -

1 stop12h 35m

Thu 29/1016:55 -

1 stop10h 35m

Deal found 21/9£537

Fri 30/1011:55 -

2 stops25h 51m

Wed 11/1119:28 -

3 stops33h 27m

Deal found 19/9£540

Sun 4/1009:40 -

2 stops34h 55m

Thu 8/1015:20 -

2 stops34h 35m

Deal found 18/9£540

Thu 3/1208:50 -

2 stops14h 30m

Tue 8/1218:30 -

2 stops16h 25m

Deal found 19/9£540

Tue 13/1017:50 -

2 stops30h 25m

Tue 20/1019:25 -

2 stops14h 55m

Deal found 18/9£541

Mon 2/1121:35 -

2 stops47h 55m

Sun 15/1120:10 -

1 stop13h 35m

Deal found 21/9£542

Wed 14/1017:05 -

2 stops25h 35m

Wed 21/1018:00 -

2 stops23h 05m

Deal found 20/9£543

Thu 17/1211:55 -

1 stop11h 25m

Sun 27/1218:30 -

1 stop10h 25m

Deal found 20/9£544

Thu 22/1013:10 -

1 stop12h 05m

Sun 25/1016:55 -

1 stop11h 20m

Deal found 18/9£546

Fri 2/1011:35 -

2 stops29h 25m

Sun 11/1011:45 -

2 stops14h 10m

Deal found 17/9£546

Wed 30/916:25 -

1 stop26h 15m

Sun 4/1018:00 -

2 stops44h 25m

Deal found 20/9£546

Thu 12/1118:30 -

2 stops27h 00m

Sat 14/1118:30 -

2 stops22h 40m

Deal found 18/9£547

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 September 2026.

Wed 7/1012:20 -

1 stop15h 10m

Tue 13/1016:55 -

1 stop11h 55m

Deal found 20/9£583

Mon 2/1110:00 -

2 stops19h 57m

Mon 9/1106:23 -

2 stops20h 37m

Deal found 17/9£599

Mon 2/1110:00 -

1 stop12h 15m

Mon 16/1107:05 -

2 stops19h 55m

Deal found 17/9£599

Fri 13/1111:55 -

2 stops41h 21m

Sat 5/1218:13 -

1 stop32h 02m

Deal found 16/9£657

Fri 9/1009:25 -

1 stop12h 30m

Fri 16/1014:20 -

1 stop12h 05m

Deal found 21/9£671

Thu 17/1216:00 -

1 stop29h 30m

Sun 27/1220:10 -

2 stops42h 25m

Deal found 21/9£686

Wed 14/1020:40 -

2 stops33h 39m

Wed 21/1011:31 -

2 stops17h 19m

Deal found 16/9£699

Wed 7/1012:20 -

1 stop15h 10m

Mon 12/1016:55 -

1 stop11h 55m

Deal found 20/9£583

Tue 3/1110:00 -

2 stops18h 33m

Tue 10/1113:31 -

2 stops20h 14m

Deal found 19/9£599

Fri 15/110:00 -

2 stops29h 24m

Tue 26/107:00 -

2 stops20h 00m

Deal found 18/9£606

Wed 14/1010:25 -

2 stops18h 08m

Wed 21/1010:59 -

2 stops16h 26m

Deal found 21/9£1,220

Fri 13/1111:55 -

2 stops41h 21m

Wed 2/1218:13 -

1 stop30h 37m

Deal found 16/9£657

Thu 28/110:00 -

2 stops19h 50m

Sun 31/117:55 -

2 stops15h 50m

Deal found 16/9£611

Sat 24/1009:25 -

1 stop12h 30m

Thu 29/1022:35 -

2 stops14h 15m

Deal found 17/9£717

Tue 17/1116:35 -

1 stop28h 55m

Tue 1/1217:46 -

2 stops33h 39m

Deal found 18/9£673

Sat 21/1110:00 -

2 stops17h 34m

Sat 28/1118:00 -

2 stops15h 45m

Deal found 20/9£690

Thu 5/1119:40 -

2 stops28h 38m

Wed 11/1112:13 -

2 stops24h 47m

Deal found 21/9£864

Thu 29/1010:00 -

2 stops17h 33m

Wed 11/1112:30 -

2 stops21h 15m

Deal found 19/9£718

Wed 28/1011:55 -

2 stops15h 35m

Tue 3/1111:20 -

2 stops17h 35m

Deal found 19/9£764

Fri 9/1014:00 -

1 stop15h 13m

Fri 23/1016:30 -

1 stop35h 30m

Deal found 18/9£798

Mon 5/1010:25 -

2 stops17h 24m

Mon 12/1010:07 -

2 stops17h 33m

Deal found 19/9£844

Sat 17/1014:00 -

1 stop15h 13m

Sat 24/1019:42 -

2 stops31h 33m

Deal found 19/9£814

Mon 19/1014:00 -

1 stop15h 13m

Mon 26/1016:30 -

1 stop33h 20m

Deal found 21/9£865

Fri 16/1020:40 -

2 stops27h 25m

Fri 23/1012:38 -

2 stops16h 12m

Deal found 18/9£1,289

Sat 14/1111:45 -

2 stops36h 33m

Tue 17/1118:50 -

2 stops42h 10m

Deal found 17/9£1,353

Mon 5/1010:25 -

2 stops17h 24m

Sun 11/1018:05 -

2 stops15h 55m

Deal found 19/9£1,039

Fri 13/1111:55 -

2 stops34h 07m

Sat 21/1116:42 -

1 stop33h 33m

Deal found 17/9£891

Thu 5/1119:40 -

2 stops28h 38m

Thu 12/1112:13 -

2 stops24h 47m

Deal found 21/9£1,456

Wed 25/1109:50 -

1 stop15h 57m

Sat 28/1120:42 -

1 stop29h 33m

Deal found 20/9£1,005

Sun 20/1211:55 -

2 stops17h 15m

Sun 3/114:25 -

2 stops14h 30m

Deal found 20/9£1,128

Find flight deals from Gatwick to Illinois

Round-trip from	£540
One-way from	£354
Popular in	August
Cheapest in	February
Average price	£623

30/10-11/11
5 total stops
59h 18m total
London to Illinois

Search Deals

Icelandair
9/11-31/12
1 total stop
11h 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 (£10 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

Fastest return journey

LondonSt. Louis

LGW London Gatwick - STL Lambert-St Louis

LGWSTL

London Gatwick

Thu 15/10

14:00-23:13

1 stop15h 13m

Lambert-St Louis

Wed 31/12

00:00-07:00

Nonstop0h 00m

£365

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Wed 2/12

10:00-22:54

2 stops18h 54m

Chicago Midway

Wed 31/12

00:00-07:00

Nonstop0h 00m

£420

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Wed 9/12

10:00-22:54

2 stops18h 54m

Chicago Midway

Wed 31/12

00:00-07:00

Nonstop0h 00m

£420

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Wed 2/12

10:00-21:36

2 stops17h 36m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£420

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Tue 13/10

20:15-21:25

3 stops31h 10m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£424

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Wed 14/10

06:10-12:40

3 stops36h 30m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£428

LondonChicago

LGW London Gatwick - MDW Chicago Midway

LGWMDW

London Gatwick

Fri 16/10

09:40-11:00

2 stops31h 20m

Chicago Midway

Wed 31/12

00:00-07:00

Nonstop0h 00m

£453

LondonSt. Louis

LGW London Gatwick - STL Lambert-St Louis

LGWSTL

London Gatwick

Fri 19/3

10:00-09:36

2 stops28h 36m

Lambert-St Louis

Wed 31/12

00:00-07:00

Nonstop0h 00m

£488

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Fri 16/10

08:55-19:15

1 stop16h 20m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£490

LondonSt. Louis

LGW London Gatwick - STL Lambert-St Louis

LGWSTL

London Gatwick

Sun 1/11

11:40-23:16

2 stops41h 36m

Lambert-St Louis

Wed 31/12

00:00-07:00

Nonstop0h 00m

£491

Flights are sorted by cheapest return flights first.

Deals found on 18/9

Showing 1-10 of 59 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

LGW-STL

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-ORD

LGW-MDW

LGW-STL

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 £475). Flying from London Gatwick Airport to Illinois in August is currently the most expensive (average of £1,703). 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 £480 and £623 in October.
The cheapest return price found within the last 5 days was £537 on Multiple Airlines (19 Oct–29 Oct).

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

747 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

747 reviews

Icelandair

6.9

Okay

747 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 British Airways, Delta, 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 £475). Flying from London Gatwick Airport to Illinois in August is currently the most expensive (average of £1,703). 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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London City to Las Vegas flights

Top airline flying from Gatwick to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£356	Average£514	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?

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Cheap flights from London Gatwick Airport to Illinois from £354

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/11. 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 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 21 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 21 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 21 September 2026.

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

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

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

Find flight deals from Gatwick to Illinois

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 £480 and £623 in October.The cheapest return price found within the last 5 days was £537 on Multiple Airlines (19 Oct–29 Oct).

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

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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 September 2026.

Popular flight searches

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Gatwick to Illinois flights

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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 21 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 21 September 2026.

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

London Gatwick Airport to Illinois flights typically cost between £480 and £623 in October.
The cheapest return price found within the last 5 days was £537 on Multiple Airlines (19 Oct–29 Oct).