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Cheap flights from Illinois to London from $231

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to London departing on 10/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Illinois to London

Cheap round-trip flights

Icelandair Logo
10:15 pm - 2:40 pmORD-LGW
10h 25m1 stop
Icelandair Logo
3:40 pm - 9:15 pmLGW-ORD
11h 35m1 stop
$504Icelandair
Find Deal
Sun, Sep 7 - Fri, Sep 19
Icelandair Logo
10:15 pm - 2:40 pmORD-LGW
10h 25m1 stop
Icelandair Logo
3:40 pm - 6:15 pmLGW-ORD
32h 35m1 stop
$505Icelandair
Find Deal
Fri, Oct 17 - Mon, Oct 20
Icelandair Logo
10:15 pm - 2:40 pmORD-LGW
10h 25m1 stop
Icelandair Logo
3:40 pm - 9:15 pmLGW-ORD
11h 35m1 stop
$506Icelandair
Find Deal
Sun, Sep 14 - Fri, Sep 19
Logo
7:20 pm - 11:35 pmORD-LGW
22h 15m2 stops
Logo
1:10 pm - 4:45 pmLGW-ORD
33h 35m2 stops
$518
Find Deal
Wed, Nov 5 - Wed, Nov 12
Logo
6:40 am - 6:00 amORD-LGW
17h 20m1 stop
Logo
6:05 am - 3:00 pmLGW-ORD
38h 55m2 stops
$522
Find Deal
Tue, Nov 11 - Tue, Nov 18
British Airways Logo
4:54 pm - 8:10 amORD-LGW
33h 16m1 stop
British Airways Logo
10:40 am - 7:35 pmLGW-ORD
14h 55m1 stop
$555British Airways
Find Deal
Wed, Oct 1 - Thu, Oct 9
British Airways Logo
4:40 pm - 8:35 amORD-LGW
33h 55m1 stop
British Airways Logo
10:40 am - 1:33 pmLGW-ORD
32h 53m1 stop
$569British Airways
Find Deal
Sat, Sep 6 - Mon, Oct 6
Delta Logo
10:45 am - 10:00 amSTL-LGW
17h 15m2 stops
Delta Logo
12:00 pm - 7:00 pmLGW-STL
37h 00m2 stops
$604Delta
Find Deal
Fri, Sep 5 - Mon, Sep 8
American Airlines Logo
7:00 am - 8:10 amEVV-LGW
19h 10m2 stops
American Airlines Logo
10:40 am - 11:32 pmLGW-EVV
18h 52m2 stops
$712American Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
American Airlines Logo
8:23 am - 8:10 amSTL-LGW
17h 47m2 stops
American Airlines Logo
12:20 pm - 11:59 pmLGW-STL
17h 39m2 stops
$728American Airlines
Find Deal
Thu, Sep 4 - Thu, Sep 18

Icelandair flights from Illinois to London Gatwick Airport

Our best Icelandair deals on Illinois to London Gatwick Airport flight tickets
Icelandair
Sep 7
ORD10:15 pmChicago O'Hare Intl
10h 25m
1 stop
LGW2:40 pmLondon Gatwick
Sep 19
LGW3:40 pmLondon Gatwick
11h 35m
1 stop
ORD9:15 pmChicago O'Hare Intl
$504
Find similar
Icelandair
Oct 17
ORD10:15 pmChicago O'Hare Intl
10h 25m
1 stop
LGW2:40 pmLondon Gatwick
Oct 20
LGW3:40 pmLondon Gatwick
32h 35m
1 stop
ORD6:15 pmChicago O'Hare Intl
$505
Find similar
Icelandair
Sep 14
ORD10:15 pmChicago O'Hare Intl
10h 25m
1 stop
LGW2:40 pmLondon Gatwick
Sep 19
LGW3:40 pmLondon Gatwick
11h 35m
1 stop
ORD9:15 pmChicago O'Hare Intl
$506
Find similar

British Airways flights from Illinois to London Gatwick Airport

Our best British Airways deals on Illinois to London Gatwick Airport flight tickets
British Airways
Oct 1
ORD4:54 pmChicago O'Hare Intl
33h 16m
1 stop
LGW8:10 amLondon Gatwick
Oct 9
LGW10:40 amLondon Gatwick
14h 55m
1 stop
ORD7:35 pmChicago O'Hare Intl
$555
Find similar
British Airways
Sep 6
ORD4:40 pmChicago O'Hare Intl
33h 55m
1 stop
LGW8:35 amLondon Gatwick
Oct 6
LGW10:40 amLondon Gatwick
32h 53m
1 stop
ORD1:33 pmChicago O'Hare Intl
$569
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to London Gatwick Airport 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, momondo users made 832,500 searches. Data last updated August 25, 2025.
Use the filters below to find and compare flights from Illinois to London Gatwick Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 9/7

10:15 pm-2:40 pm

1 stop10h 25m

London Gatwick

Fri 9/19

3:40 pm-9:15 pm

1 stop11h 35m

$504

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 10/17

10:15 pm-2:40 pm

1 stop10h 25m

London Gatwick

Mon 10/20

3:40 pm-6:15 pm

1 stop32h 35m

$505

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 9/14

10:15 pm-2:40 pm

1 stop10h 25m

London Gatwick

Fri 9/19

3:40 pm-9:15 pm

1 stop11h 35m

$506

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 11/5

7:20 pm-11:35 pm

2 stops22h 15m

London Gatwick

Wed 11/12

1:10 pm-4:45 pm

2 stops33h 35m

$518

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Tue 11/11

6:40 am-6:00 am

1 stop17h 20m

London Gatwick

Tue 11/18

6:05 am-3:00 pm

2 stops38h 55m

$522

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 10/1

4:54 pm-8:10 am

1 stop33h 16m

London Gatwick

Thu 10/9

10:40 am-7:35 pm

1 stop14h 55m

$555

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sat 9/6

4:40 pm-8:35 am

1 stop33h 55m

London Gatwick

Mon 10/6

10:40 am-1:33 pm

1 stop32h 53m

$569

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Fri 9/5

10:45 am-10:00 am

2 stops17h 15m

London Gatwick

Mon 9/8

12:00 pm-7:00 pm

2 stops37h 00m

$604

EvansvilleLondon

EVV - LGW

EVVLGW

Evansville Dress Regional

Tue 10/7

7:00 am-8:10 am

2 stops19h 10m

London Gatwick

Tue 10/14

10:40 am-11:32 pm

2 stops18h 52m

$712

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Thu 9/4

8:23 am-8:10 am

2 stops17h 47m

London Gatwick

Thu 9/18

12:20 pm-11:59 pm

2 stops17h 39m

$728

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Illinois to London Gatwick Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

In general, February is the cheapest month to fly from Illinois to London Gatwick Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $589. If you are unable to visit London Gatwick Airport during the month of February, then departing from Illinois during the month November is also very affordable. Most momondo users find prices during this month for around $651.

What is the cheapest day to depart on your flight to London Gatwick Airport?

The cheapest day to depart from Illinois to London Gatwick Airport is on a Saturday when prices can be found for as low as $648. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to London Gatwick Airport on Friday is $903.

What is the cheapest time of day to depart on your flight to London Gatwick Airport?

Flying to London Gatwick Airport from Illinois in the evening is the least expensive time of day to depart. momondo users have found prices as low as $692 when looking at flights departing in the evening. In the morning is when there is more demand to fly to London Gatwick Airport, so prices are often more expensive at around $845 per ticket.

Cheap Illinois to London Gatwick Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to London Gatwick Airport

Direct flights

None
There are no direct flights from Illinois to London Gatwick Airport. There are no popular flight routes from Illinois to London Gatwick Airport.
Search flight deals

  • When did momondo last update prices for flights from Illinois to London Gatwick Airport?

    Prices for flights from Illinois to London Gatwick Airport were last updated today.

  • How many operators does momondo search for flights from Illinois to London Gatwick Airport?

  • How old do you have to be to fly from Illinois to London Gatwick Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to London Gatwick Airport.

  • What documentation or ID do you need to fly to London Gatwick Airport?

    The travel and health documents you'll need for your trip to London Gatwick Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Gatwick Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Illinois to London Gatwick Airport

Compare and see reviews for airlines that fly from Illinois to London Gatwick Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $502Free CancellationRating
6.7
7,305 reviews
Search British Airways flights
IcelandairPriceFrom $507Free CancellationRating
7.0
533 reviews
Search Icelandair flights
IberiaPriceFrom $606Free CancellationRating
7.0
2,889 reviews
Search Iberia flights
DeltaPriceFrom $712Free CancellationRating
7.9
7,981 reviews
Search Delta flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Luton
Dover
Slough
Milton Keynes
Guildford
Dartford
Crawley
Stansted
Hayes
Chelmsford
Brentwood
Ilford
Folkestone
Colchester
Watford
Canterbury
Richmond
Wembley

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to London. momondo saves you time and could save you money on your trip.

Can I find flights from Illinois to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from Illinois which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Illinois to London?

momondo helps you find the best flight between Illinois and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Illinois to London right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to London from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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