$382 Find Cheap Flights from London Gatwick Airport to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Gatwick to Illinois departing on 9/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Illinois, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Gatwick to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
St. Louis
St. Louis2 stops$827
St. Louis
St. Louis2 stops$827

Book Cheap Gatwick to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Gatwick to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Gatwick to Illinois

Mon, Sep 8 - Sat, Oct 4
 Logo
2:00 pm - 10:52 amLGW-ORD
26h 52m2 stops
 Logo
2:00 pm - 9:25 amORD-LGW
13h 25m2 stops
Mon, Sep 8 - Thu, Sep 25
 Logo
10:00 am - 11:20 pmLGW-ORD
19h 20m2 stops
 Logo
10:27 am - 7:00 amORD-LGW
14h 33m1 stop
Sat, Sep 13 - Sat, Oct 18
British Airways Logo
10:40 am - 7:41 pmLGW-ORD
15h 01m1 stop
British Airways Logo
1:40 pm - 8:10 amORD-LGW
12h 30m1 stop
$569British Airways
Find Deal
Sun, Sep 14 - Mon, Oct 6
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2:00 pm - 7:11 amLGW-MDW
23h 11m2 stops
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8:15 am - 10:00 amMDW-LGW
19h 45m2 stops
Sun, Oct 5 - Sun, Oct 12
American Airlines Logo
2:45 pm - 10:51 pmLGW-ORD
14h 06m1 stop
American Airlines Logo
1:43 pm - 7:50 amORD-LGW
12h 07m1 stop
$572American Airlines
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Thu, Sep 18 - Sat, Oct 18
Icelandair Logo
3:40 pm - 9:15 pmLGW-ORD
11h 35m1 stop
Icelandair Logo
7:25 pm - 2:35 pmORD-LGW
13h 10m1 stop
$574Icelandair
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Wed, Sep 10 - Tue, Oct 14
Icelandair Logo
3:35 pm - 9:15 pmLGW-ORD
11h 40m1 stop
Icelandair Logo
7:25 pm - 2:40 pmORD-LGW
13h 15m1 stop
$576Icelandair
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Sat, Nov 15 - Sun, Nov 23
American Airlines Logo
11:20 am - 9:05 pmLGW-ORD
15h 45m1 stop
American Airlines Logo
10:29 am - 9:00 amORD-LGW
16h 31m2 stops
$584American Airlines
Find Deal
Wed, Sep 17 - Thu, Oct 16
TAP AIR PORTUGAL Logo
4:25 pm - 10:55 amLGW-ORD
24h 30m1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 8:25 pmORD-LGW
20h 25m2 stops
$596TAP AIR PORTUGAL
Find Deal
Fri, Nov 7 - Sun, Dec 7
TAP AIR PORTUGAL Logo
9:35 pm - 3:00 pmLGW-ORD
47h 25m2 stops
TAP AIR PORTUGAL Logo
8:25 pm - 3:45 pmORD-LGW
13h 20m1 stop
$606TAP AIR PORTUGAL
Find Deal
Booking Insights

KAYAK's insights & trends for Gatwick to Illinois flights

Get data-powered insights and trends into flights from Gatwick to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from London Gatwick Airport to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Gatwick Airport to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London Gatwick Airport to Illinois is January, when tickets cost $528 (return) on average. On the other hand, the most expensive months are March and August, when the average cost of round-trip tickets is $1,316 and $1,050 respectively.

What’s the cheapest day of the week to fly from London Gatwick Airport to Illinois?

The average price of all round-trip flights from London Gatwick Airport to Illinois clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Illinois on a Sunday and more expensive on a Thursday. On your return trip to London Gatwick Airport, you should consider flying back on a Saturday, and avoid Fridays for better deals.

How far in advance should I book a flight from London Gatwick Airport to Illinois?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Gatwick Airport to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from London Gatwick Airport to Illinois, you should book around 4 weeks before departure, which saves you about 36% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$382
Best time to beat the crowds with an average 45% drop in price.
Most popular time to fly with an average 14% increase in price.
Flight from London Gatwick Airport to St. Louis

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from London Gatwick Airport to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Gatwick Airport to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Gatwick Airport to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London Gatwick Airport to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Gatwick Airport to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from London Gatwick Airport to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Gatwick Airport to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from London Gatwick Airport to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $713 on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $773.

Reviews of the top airline flying from Gatwick to Illinois

 
See real verified KAYAK customer reviews for airlines flying from London to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Gatwick to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.0
IcelandairOverall score based on 534 reviews
6.2Food
7.1Boarding
8.0Crew
7.0Entertainment
6.9Comfort
Airline reviews

Best smelling onboard bathrooms ever. Even after use the whole flight. Biggest overhead bins. Most legroom in economy class. Great Icelandiic music. Really nice staff. Icelandair is awesome! (Don’t fly Air Canada! During the strike they lied about no flights available (I booked this flight myself) and hid the process to get money back on their website by obscuring menu titles, then made it difficult and time consuming to fill out. I’m Canadian. Don’t trust Air Canada!

10.0 ExcellentGlen, Aug 2025DUB - KEF
Read more Icelandair reviews

Best smelling onboard bathrooms ever. Even after use the whole flight. Biggest overhead bins. Most legroom in economy class. Great Icelandiic music. Really nice staff. Icelandair is awesome! (Don’t fly Air Canada! During the strike they lied about no flights available (I booked this flight myself) and hid the process to get money back on their website by obscuring menu titles, then made it difficult and time consuming to fill out. I’m Canadian. Don’t trust Air Canada!

Worst airline I’ve ever flown. Delayed 5.5 hrs, missed connecting flight, and missed an entire day of vacation. Zero customer service

There was no lounge at Boston for us to use. Typically flying first class overseas comes with lounge privileges. The seats did not recline even a little. My headset only worked on one side. I felt like I was flying on Ryan Air, not Icelandic Air.

Boarded with no problems. Sat on the tarmac for an hour before taking off. We were the last ones on our connecting flight. Didn't think we were going to make it. Our flight to Iceland was similarly delayed. When we've flown other airlines, pilots have tried to make up time while in the air. This doesn't seem to be something that Icelandair does. We made all of our flights, but it was stressful and we didn't think it was going to happen based on the time we arrived.

Great experience on Icelandair flight from Newark to Amsterdam by way of Reykjavík. Courteous and professional staff. Food was solid. Service - outstanding. Cabin was a little warm.

Good service. No complementary food for international flight. WiFi kinda pricey. Got the job done for the right price.

Overall good for an economy fare. IMO the movie selection could be improved. Great that you can now connect bluetooth headphones to the entertainment system.

For a four hour flight, I was disappointed that everything was for purchase except for coffee, tea, or water. The disembarking in Iceland was so inefficient and time-consuming. We landed and stopped in the middle of the tarmac, had to disembark in the rain, and then squeeze into a bus which took us to the airport. Crazy! How does that work in winter?

Comfort of seats is not good. Like sitting on a rock for 6 hours. Also no in flight food and limited beverages unless you pay is not nice. Need flight to be dark during the “night” but attendants don’t ask for shades to be lowered..

Seats in premier saga class were narrow and hard. Very uncomfortable for a 5-hour flight.

Everything you need to know for your flight from Gatwick to Illinois

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