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Cheap flights from London Gatwick Airport to Illinois from £243

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 31/5. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — ORD
18 May — 25 May1
1 adult
1 adult, Economy, 0 bags

Cheap 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 18 April 2026.

Wed 16/915:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Wed 14/1019:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 13/4£496
Tue 21/409:40
LGW
-
ORD
2 stops14h 35m
Multiple Airlines
Tue 28/419:25
ORD
-
LGW
2 stops19h 50m
Multiple Airlines
Deal found 12/4£500
Sun 7/616:40
LGW
-
ORD
2 stops26h 30m
Multiple Airlines
Sun 28/615:00
ORD
-
LGW
2 stops24h 55m
Multiple Airlines
Deal found 16/4£511
Tue 21/416:25
LGW
-
ORD
1 stop29h 35m
TAP AIR PORTUGAL
Sat 25/418:05
ORD
-
LGW
1 stop33h 40m
TAP AIR PORTUGAL
Deal found 14/4£513
Mon 18/506:55
LGW
-
ORD
2 stops20h 30m
Multiple Airlines
Wed 27/519:25
ORD
-
LGW
2 stops20h 00m
Multiple Airlines
Deal found 16/4£514
Wed 13/515:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Tue 19/522:25
ORD
-
LGW
1 stop31h 20m
Icelandair
Deal found 13/4£516
Tue 1/915:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Wed 23/919:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 14/4£517
Mon 15/619:35
LGW
-
ORD
2 stops28h 40m
Multiple Airlines
Wed 24/622:25
ORD
-
LGW
2 stops17h 20m
Multiple Airlines
Deal found 15/4£518
Sun 1/1111:55
LGW
-
ORD
1 stop11h 25m
Icelandair
Thu 12/1118:30
ORD
-
LGW
1 stop10h 25m
Icelandair
Deal found 13/4£520
Wed 6/509:45
LGW
-
ORD
1 stop15h 30m
Multiple Airlines
Mon 11/521:00
ORD
-
LGW
1 stop17h 55m
Multiple Airlines
Deal found 13/4£522
Sat 25/407:30
LGW
-
MDW
2 stops35h 30m
Multiple Airlines
Sat 2/507:30
MDW
-
LGW
1 stop16h 50m
Multiple Airlines
Deal found 16/4£561
Thu 28/514:00
LGW
-
MDW
2 stops27h 09m
Multiple Airlines
Tue 2/615:20
MDW
-
LGW
1 stop13h 25m
Multiple Airlines
Deal found 14/4£598

Find flight deals from Gatwick to Illinois

Keep the following information in mind while searching for Gatwick to Illinois flight deals. Data was last updated 18 April 2026.

Round-trip from

£511

One-way from

£243

Popular in

July

Cheapest in

September

Average price

£539
7/6-28/6
  • 7/6-28/6
  • 4 total stops
  • 51h 25m total
  • London to Illinois
Search Deals
31/5
  • 31/5
  • 1 total stop
  • 26h 29m total
  • London to Illinois
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£51 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 April 2026
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 18 April 2026.
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 - MDW

LGWMDW

London Gatwick

Fri 29/5

09:40-09:45

2 stops30h 05m

Chicago Midway

Tue 2/6

09:22-10:45

2 stops19h 23m

£622

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 14/10

16:25-12:40

1 stop26h 15m

Chicago O'Hare Intl

Wed 21/10

18:00-14:00

1 stop14h 00m

£635

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 29/4

09:25-15:55

1 stop12h 30m

Chicago O'Hare Intl

Mon 11/5

21:30-17:50

2 stops14h 20m

£669

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Mon 1/6

11:35-09:40

2 stops28h 05m

Chicago Midway

Sun 7/6

10:25-07:55

2 stops15h 30m

£678

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Mon 11/5

21:30-18:33

3 stops27h 03m

Chicago Midway

Mon 18/5

10:30-09:25

2 stops16h 55m

£696

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Wed 29/4

14:00-07:21

1 stop23h 21m

Chicago Midway

Sun 3/5

07:30-16:25

2 stops26h 55m

£700

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 24/9

15:40-18:15

1 stop32h 35m

Chicago O'Hare Intl

Tue 29/9

14:15-14:40

2 stops18h 25m

£715

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Sun 31/5

09:40-09:40

2 stops30h 00m

Chicago Midway

Tue 2/6

10:25-07:55

2 stops15h 30m

£721

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Tue 18/8

16:25-16:00

1 stop29h 35m

Chicago O'Hare Intl

Thu 20/8

19:50-09:45

1 stop31h 55m

£723

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Mon 11/5

12:40-09:45

1 stop27h 05m

Chicago Midway

Fri 15/5

06:00-10:00

2 stops22h 00m

£725

Flights are sorted by cheapest return flights first.

Deals found on 14/4

Showing 1-10 of 58 resultsSorted by cheapest first
1
2
3
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6

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, December is the cheapest month in which you can book a flight from London Gatwick Airport to Illinois (average of £171). Flying from London Gatwick Airport to Illinois in July is currently the most expensive (average of £508). 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?

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 18 April 2026.
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
7.0
Good
634 reviews
Check prices

Crew

8.0

Comfort

6.9

Entertainment

6.9

Overall

7.0

Food

6.2

Boarding

7.2

Reviews

1 / 20
10.0
Excellent

Ásmundur,Apr 2026

CDG - KEF

The flight was uneventfull and ahead of schedule. The crew was attentive and the service good.
Icelandair
7.0
Good
634 reviews
Icelandair
7.0
Good
634 reviews
Check prices

Crew

8.0

Comfort

6.9

Entertainment

6.9

Overall

7.0

Food

6.2

Boarding

7.2

Reviews

1 / 20
10.0
Excellent

Ásmundur,Apr 2026

CDG - KEF

The flight was uneventfull and ahead of schedule. The crew was attentive and the service good.

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 12h 30m. Fly via TAP AIR PORTUGAL, SWISS, or Icelandair 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, December is the cheapest month in which you can book a flight from London Gatwick Airport to Illinois (average of £171). Flying from London Gatwick Airport to Illinois in July is currently the most expensive (average of £508). 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 18 April 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£346Average£502FlexibilityNo cancel feeOn-time76%
Search Icelandair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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