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Cheap flights from Illinois to London from $279

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 8/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Illinois to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:34 pm - 10:00 amSTL  Lambert-St Louis-LGW London Gatwick
31h 26m1 stop Orlando
Multiple Airlines Logo
10:10 am - 9:40 amLGW  London Gatwick-STL Lambert-St Louis
53h 30m2 stops Orlando Atlanta Hartsfield-Jackson
$588Multiple Airlines
Fri, Oct 23 - Tue, Nov 3
Multiple Airlines Logo
8:34 pm - 10:00 amSTL  Lambert-St Louis-LGW London Gatwick
31h 26m1 stop Orlando
Multiple Airlines Logo
10:10 am - 9:40 amLGW  London Gatwick-STL Lambert-St Louis
53h 30m2 stops Orlando Atlanta Hartsfield-Jackson
$610Multiple Airlines
Fri, Oct 23 - Tue, Nov 3
Multiple Airlines Logo
5:19 pm - 10:00 amSTL  Lambert-St Louis-LGW London Gatwick
34h 41m1 stop Orlando
Multiple Airlines Logo
2:00 pm - 5:54 pmLGW  London Gatwick-STL Lambert-St Louis
33h 54m1 stop Orlando
$669Multiple Airlines
Sun, Sep 27 - Wed, Sep 30
Multiple Airlines Logo
6:05 am - 10:00 amORD  Chicago O'Hare Intl-LGW London Gatwick
21h 55m1 stop Orlando
Multiple Airlines Logo
10:10 am - 8:21 amLGW  London Gatwick-ORD Chicago O'Hare Intl
27h 11m1 stop Orlando
$673Multiple Airlines
Tue, Oct 20 - Wed, Oct 28
Multiple Airlines Logo
9:20 am - 10:00 amORD  Chicago O'Hare Intl-LGW London Gatwick
18h 40m2 stops Atlanta Hartsfield-Jackson Orlando
Multiple Airlines Logo
11:00 am - 8:21 amLGW  London Gatwick-ORD Chicago O'Hare Intl
26h 21m1 stop Orlando
$677Multiple Airlines
Sat, Oct 24 - Thu, Oct 29
Multiple Airlines Logo
6:05 am - 10:00 amORD  Chicago O'Hare Intl-LGW London Gatwick
21h 55m1 stop Orlando
Multiple Airlines Logo
10:10 am - 11:50 pmLGW  London Gatwick-ORD Chicago O'Hare Intl
18h 40m1 stop Orlando
$680Multiple Airlines
Tue, Oct 20 - Tue, Oct 27
Multiple Airlines Logo
7:15 pm - 7:15 pmORD  Chicago O'Hare Intl-LGW London Gatwick
18h 00m2 stops Kastrup Copenhagen Stockholm Arlanda
Multiple Airlines Logo
7:55 pm - 4:10 pmLGW  London Gatwick-ORD Chicago O'Hare Intl
26h 15m2 stops Stockholm Arlanda Kastrup Copenhagen
$681Multiple Airlines
Tue, Oct 13 - Tue, Oct 20
Multiple Airlines Logo
9:20 am - 10:00 amORD  Chicago O'Hare Intl-LGW London Gatwick
18h 40m2 stops Atlanta Hartsfield-Jackson Orlando
Multiple Airlines Logo
10:10 am - 8:21 amLGW  London Gatwick-ORD Chicago O'Hare Intl
27h 11m1 stop Orlando
$681Multiple Airlines
Thu, Oct 22 - Wed, Oct 28
Icelandair Logo
7:25 pm - 2:40 pmORD  Chicago O'Hare Intl-LGW London Gatwick
13h 15m1 stop Reykjavik Keflavik Intl
Icelandair Logo
11:55 am - 6:20 pmLGW  London Gatwick-ORD Chicago O'Hare Intl
11h 25m1 stop Reykjavik Keflavik Intl
$685Icelandair
Thu, Oct 22 - Thu, Oct 29
Icelandair Logo
7:25 pm - 2:40 pmORD  Chicago O'Hare Intl-LGW London Gatwick
13h 15m1 stop Reykjavik Keflavik Intl
Icelandair Logo
11:55 am - 6:20 pmLGW  London Gatwick-ORD Chicago O'Hare Intl
11h 25m1 stop Reykjavik Keflavik Intl
$693Icelandair
Thu, Oct 22 - Thu, Oct 29

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Icelandair flights from Illinois to London Gatwick Airport

Our best Icelandair deals on Illinois to London Gatwick Airport flight tickets
Icelandair
Oct 6
ORD7:25 pmChicago O'Hare Intl
13h 15m
1 stop
LGW2:40 pmLondon Gatwick
Oct 13
LGW3:40 pmLondon Gatwick
32h 35m
1 stop
ORD6:15 pmChicago O'Hare Intl
$694
Icelandair
Nov 7
ORD6:30 pmChicago O'Hare Intl
10h 25m
1 stop
LGW10:55 amLondon Gatwick
Nov 16
LGW11:55 amLondon Gatwick
11h 25m
1 stop
ORD5:20 pmChicago O'Hare Intl
$698
Icelandair
Sep 22
ORD7:25 pmChicago O'Hare Intl
13h 15m
1 stop
LGW2:40 pmLondon Gatwick
Sep 29
LGW3:40 pmLondon Gatwick
32h 35m
1 stop
ORD6:15 pmChicago O'Hare Intl
$702

TAP AIR PORTUGAL flights from Illinois to London Gatwick Airport

Our best TAP AIR PORTUGAL deals on Illinois to London Gatwick Airport flight tickets
TAP AIR PORTUGAL
Oct 8
ORD6:00 pmChicago O'Hare Intl
33h 45m
1 stop
LGW9:45 amLondon Gatwick
Oct 14
LGW4:25 pmLondon Gatwick
26h 15m
1 stop
ORD12:40 pmChicago O'Hare Intl
$714
TAP AIR PORTUGAL
Oct 28
ORD8:00 pmChicago O'Hare Intl
14h 05m
1 stop
LGW3:05 pmLondon Gatwick
Nov 3
LGW4:35 pmLondon Gatwick
28h 55m
1 stop
ORD3:30 pmChicago O'Hare Intl
$725
TAP AIR PORTUGAL
Aug 12
ORD6:00 pmChicago O'Hare Intl
14h 00m
1 stop
LGW2:00 pmLondon Gatwick
Sep 15
LGW4:25 pmLondon Gatwick
29h 35m
1 stop
ORD4:00 pmChicago O'Hare Intl
$752

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 11, 2026.
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

Cheapest round-trip

St. LouisLondon

STL Lambert-St Louis - LGW London Gatwick

STLLGW

Lambert-St Louis

Fri 10/23

8:34 pm-10:00 am

1 stop31h 26m

London Gatwick

Tue 11/3

10:10 am-9:40 am

2 stops53h 30m

$588

St. LouisLondon

STL Lambert-St Louis - LGW London Gatwick

STLLGW

Lambert-St Louis

Fri 10/23

8:34 pm-10:00 am

1 stop31h 26m

London Gatwick

Tue 11/3

10:10 am-9:40 am

2 stops53h 30m

$610

St. LouisLondon

STL Lambert-St Louis - LGW London Gatwick

STLLGW

Lambert-St Louis

Sun 9/27

5:19 pm-10:00 am

1 stop34h 41m

London Gatwick

Wed 9/30

2:00 pm-5:54 pm

1 stop33h 54m

$669

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Tue 10/20

6:05 am-10:00 am

1 stop21h 55m

London Gatwick

Wed 10/28

10:10 am-8:21 am

1 stop27h 11m

$673

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Sat 10/24

9:20 am-10:00 am

2 stops18h 40m

London Gatwick

Thu 10/29

11:00 am-8:21 am

1 stop26h 21m

$677

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Tue 10/20

6:05 am-10:00 am

1 stop21h 55m

London Gatwick

Tue 10/27

10:10 am-11:50 pm

1 stop18h 40m

$680

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Tue 10/13

7:15 pm-7:15 pm

2 stops18h 00m

London Gatwick

Tue 10/20

7:55 pm-4:10 pm

2 stops26h 15m

$681

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Thu 10/22

9:20 am-10:00 am

2 stops18h 40m

London Gatwick

Wed 10/28

10:10 am-8:21 am

1 stop27h 11m

$681
Quickest round-trip

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Thu 10/22

7:25 pm-2:40 pm

1 stop13h 15m

London Gatwick

Thu 10/29

11:55 am-6:20 pm

1 stop11h 25m

$685

ChicagoLondon

ORD Chicago O'Hare Intl - LGW London Gatwick

ORDLGW

Chicago O'Hare Intl

Thu 10/22

7:25 pm-2:40 pm

1 stop13h 15m

London Gatwick

Thu 10/29

11:55 am-6:20 pm

1 stop11h 25m

$693

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, January 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 $478. If you are unable to visit London Gatwick Airport during the month of January, then departing from Illinois during the month February is also very affordable. Most momondo users find prices during this month for around $492.

Can stopping save me money on Illinois to London Gatwick Airport flights?

You could potentially save up to 29% on your flight if you consider stops on a Illinois to London Gatwick Airport flight.

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

Fastest flight time

10h 25m

Direct flights

None
The fastest flight from Illinois to London Gatwick Airport takes 10h 25m
There are no direct flights from Illinois to London Gatwick Airport. There are no popular flight routes from Illinois to London Gatwick Airport.
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Frequently asked questions about flying from Illinois to London Gatwick Airport

  • 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
IcelandairPriceFrom $430Free CancellationRating
6.9
728 reviews
Search Icelandair flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Milton Keynes
Luton
Hayes
Wembley
Croydon
Dover
Stansted
Richmond
Kingston upon Thames
Harrow
Watford
Cobham
Slough
Uxbridge
Worthing
Romford
Ilford
Bedford

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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