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Cheap flights from London Gatwick Airport to Illinois from £374

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — ORD
1 Jan — 8 Jan1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Gatwick to Illinois

Enter your travel dates to find the best prices.

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 2 December 2025.

Wed 3/1209:35LGW - ORD
2 stops59h 50mTAP AIR PORTUGAL
Sun 7/1220:25ORD - LGW
1 stop13h 20mTAP AIR PORTUGAL
Deal found 29/11£452
Thu 4/1216:00LGW - ORD
1 stop29h 25mTAP AIR PORTUGAL
Sun 7/1220:25ORD - LGW
2 stops18h 10mTAP AIR PORTUGAL
Deal found 30/11£454
Fri 5/1218:40LGW - ORD
1 stop24h 05mSWISS
Sun 7/1216:10ORD - LGW
1 stop19h 40mSWISS
Deal found 29/11£460
Wed 24/1208:50LGW - ORD
2 stops14h 30mMultiple Airlines
Wed 31/1218:30ORD - LGW
2 stops16h 50mMultiple Airlines
Deal found 1/12£481
Thu 4/1211:55LGW - ORD
1 stop11h 25mIcelandair
Mon 8/1218:30ORD - LGW
1 stop10h 25mIcelandair
Deal found 30/11£484
Tue 16/1221:20LGW - ORD
2 stops23h 40mTAP AIR PORTUGAL
Sun 11/120:25ORD - LGW
1 stop13h 20mTAP AIR PORTUGAL
Deal found 30/11£495
Mon 15/1221:25LGW - ORD
2 stops47h 35mTAP AIR PORTUGAL
Sun 11/120:25ORD - LGW
1 stop13h 20mTAP AIR PORTUGAL
Deal found 30/11£497
Sat 6/1219:55LGW - ORD
2 stops24h 50mMultiple Airlines
Sat 7/317:53ORD - LGW
2 stops20h 47mMultiple Airlines
Deal found 29/11£497
Tue 16/1214:35LGW - ORD
2 stops30h 25mMultiple Airlines
Mon 12/108:35ORD - LGW
1 stop15h 25mMultiple Airlines
Deal found 29/11£501
Sat 13/1219:55LGW - ORD
2 stops24h 50mMultiple Airlines
Mon 12/108:35ORD - LGW
1 stop15h 25mMultiple Airlines
Deal found 30/11£502
Mon 15/1216:20LGW - ORD
2 stops31h 00mMultiple Airlines
Mon 12/116:38ORD - LGW
1 stop31h 22mMultiple Airlines
Deal found 30/11£506
Mon 15/1214:00LGW - MDW
2 stops24h 46mMultiple Airlines
Thu 15/111:27MDW - LGW
1 stop16h 33mMultiple Airlines
Deal found 30/11£604

Cheap flight deals from Gatwick to Illinois

Keep the following information in mind while searching for Gatwick to Illinois flight deals. Data was last updated 2 December 2025.

Round-trip from

£374

Popular in

July

Cheapest in

February

Average price

£604
12/1-26/1
  • 12/1-26/1
  • 2 total stops
  • 32h 17m total
  • London to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£60 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Gatwick to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 December 2025.
Use the filters below to find and compare flights from London Gatwick Airport to Illinois that are best for you.

Fly from

Gatwick

Fly to

Illinois

Route

Depart

Return

Price

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Mon 12/1

14:00-22:33

1 stop14h 33m

Lambert-St Louis

Mon 26/1

10:16-10:00

1 stop17h 44m

£374

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 28/1

11:45-17:42

2 stops35h 57m

Chicago O'Hare Intl

Thu 5/2

17:40-19:00

1 stop19h 20m

£474

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 28/2

11:55-17:20

1 stop11h 25m

Chicago O'Hare Intl

Thu 19/3

19:30-10:55

1 stop10h 25m

£487

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 11/4

15:40-18:15

1 stop32h 35m

Chicago O'Hare Intl

Fri 17/4

19:25-14:40

1 stop13h 15m

£488

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 12/1

18:40-12:45

1 stop24h 05m

Chicago O'Hare Intl

Mon 26/1

18:35-17:50

2 stops17h 15m

£504

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 22/1

11:20-23:12

2 stops41h 52m

Lambert-St Louis

Mon 26/1

10:17-09:00

2 stops16h 43m

£513

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Wed 14/1

13:00-06:51

2 stops47h 51m

Lambert-St Louis

Wed 21/1

17:42-10:00

1 stop34h 18m

£513

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Fri 9/1

14:00-23:09

1 stop15h 09m

Chicago Midway

Sun 11/1

09:15-10:00

2 stops18h 45m

£519

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 4/2

09:35-15:25

2 stops59h 50m

Chicago O'Hare Intl

Sun 8/2

20:25-15:45

1 stop13h 20m

£540

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Tue 13/1

13:00-00:02

1 stop17h 02m

Chicago Midway

Thu 15/1

18:30-20:40

2 stops20h 10m

£541

Flights are sorted by cheapest return flights first.

Deals found on 30/11

Showing 1-10 of 58 results
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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.
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

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

Currently, March is the cheapest month in which you can book a flight from London Gatwick Airport to Illinois (average of £305). Flying from London Gatwick Airport to Illinois in July is currently the most expensive (average of £520). 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.

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

Find hourly flight availability from Gatwick to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 December 2025.

When flying from London Gatwick Airport to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight at midday, which can drop the price by up to 42% versus a flight in the morning.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 2 December 2025.
See what other customers who have flown with Icelandair and British Airways 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
7.0
Good
584 reviews
Check prices

Crew

8.0

Comfort

6.9

Boarding

7.1

Food

6.2

Overall

7.0

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.
Icelandair
7.0
Good
584 reviews
Icelandair
7.0
Good
584 reviews
Check prices

Crew

8.0

Comfort

6.9

Boarding

7.1

Food

6.2

Overall

7.0

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.
British Airways
6.7
Okay
7,549 reviews
Icelandair
7.0
Good
584 reviews
Check prices

Crew

8.0

Comfort

6.9

Boarding

7.1

Food

6.2

Overall

7.0

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.

Related info for your journey

Find useful and relevant information for your journey from Gatwick to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 25m. Fly via British Airways, Icelandair, or SWISS 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, March is the cheapest month in which you can book a flight from London Gatwick Airport to Illinois (average of £305). Flying from London Gatwick Airport to Illinois in July is currently the most expensive (average of £520). 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

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Gatwick to Illinois

Discover the top airline that operate flights from Gatwick to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 December 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£319Average£527FlexibilityNo cancel feeOn-time76%
Search Icelandair flights

Fly with Cheapflights

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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.

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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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