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Cheap flights from Illinois to London from $308

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 9/15. 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
6:30 pm - 11:15 pmORD  Chicago O'Hare Intl-STN London Stansted
22h 45m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen
Multiple Airlines Logo
5:55 am - 5:20 pmSTN  London Stansted-ORD Chicago O'Hare Intl
17h 25m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl
$667Multiple Airlines
Fri, Nov 13 - Fri, Nov 20
Multiple Airlines Logo
7:30 pm - 11:45 pmORD  Chicago O'Hare Intl-STN London Stansted
22h 15m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
6:10 am - 7:25 pmSTN  London Stansted-ORD Chicago O'Hare Intl
18h 15m1 stop Dublin
$668Multiple Airlines
Sat, Oct 24 - Wed, Oct 28
Multiple Airlines Logo
6:30 pm - 9:55 pmORD  Chicago O'Hare Intl-STN London Stansted
21h 25m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen
Multiple Airlines Logo
12:50 pm - 5:20 pmSTN  London Stansted-ORD Chicago O'Hare Intl
34h 30m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl
$669Multiple Airlines
Thu, Nov 12 - Mon, Nov 16
Multiple Airlines Logo
3:45 pm - 12:50 pmORD  Chicago O'Hare Intl-STN London Stansted
15h 05m1 stop Dublin
Multiple Airlines Logo
8:25 am - 5:50 pmSTN  London Stansted-ORD Chicago O'Hare Intl
39h 25m2 stops Vilnius Helsinki-Vantaa
$669Multiple Airlines
Mon, Sep 28 - Mon, Oct 5
Multiple Airlines Logo
6:30 pm - 4:55 pmORD  Chicago O'Hare Intl-STN London Stansted
16h 25m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen
Multiple Airlines Logo
8:15 am - 5:20 pmSTN  London Stansted-ORD Chicago O'Hare Intl
15h 05m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl
$670Multiple Airlines
Sun, Nov 1 - Sun, Nov 8
Multiple Airlines Logo
7:25 pm - 10:25 pmORD  Chicago O'Hare Intl-STN London Stansted
21h 00m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
6:30 am - 6:15 pmSTN  London Stansted-ORD Chicago O'Hare Intl
17h 45m2 stops Dublin Reykjavik Keflavik Intl
$674Multiple Airlines
Thu, Oct 1 - Wed, Oct 7
Multiple Airlines Logo
7:30 pm - 5:50 pmORD  Chicago O'Hare Intl-STN London Stansted
17h 20m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen
Multiple Airlines Logo
11:35 am - 5:20 pmSTN  London Stansted-ORD Chicago O'Hare Intl
35h 45m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl
$674Multiple Airlines
Mon, Oct 26 - Mon, Nov 2
Multiple Airlines Logo
7:25 pm - 10:20 pmORD  Chicago O'Hare Intl-STN London Stansted
20h 55m2 stops Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
6:30 am - 9:25 pmSTN  London Stansted-ORD Chicago O'Hare Intl
20h 55m2 stops Dublin Reykjavik Keflavik Intl
$675Multiple Airlines
Tue, Sep 22 - Wed, Sep 30
Multiple Airlines Logo
6:30 pm - 3:40 pmORD  Chicago O'Hare Intl-STN London Stansted
15h 10m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen
Multiple Airlines Logo
8:15 am - 5:20 pmSTN  London Stansted-ORD Chicago O'Hare Intl
15h 05m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl
$679Multiple Airlines
Sun, Nov 8 - Tue, Nov 17
Multiple Airlines Logo
7:15 pm - 9:35 pmORD  Chicago O'Hare Intl-STN London Stansted
20h 20m2 stops Kastrup Copenhagen Helsinki-Vantaa
Multiple Airlines Logo
3:45 pm - 4:45 pmSTN  London Stansted-ORD Chicago O'Hare Intl
31h 00m3 stops Helsinki-Vantaa Stockholm Arlanda Kastrup Copenhagen
$680Multiple Airlines
Sun, Nov 1 - Sun, Nov 8

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Turkish Airlines flights from Illinois to London Stansted Airport

Our best Turkish Airlines deals on Illinois to London Stansted Airport flight tickets
Turkish Airlines
Sep 27
STL8:00 amLambert-St Louis
50h 40m
2 stops
STN4:40 pmLondon Stansted
Oct 6
STN5:35 pmLondon Stansted
33h 46m
2 stops
STL9:21 pmLambert-St Louis
$1,177
Turkish Airlines
Nov 7
STL7:30 amLambert-St Louis
44h 25m
2 stops
STN9:55 amLondon Stansted
Nov 23
STN10:55 amLondon Stansted
41h 29m
2 stops
STL10:24 pmLambert-St Louis
$1,183
Turkish Airlines
Sep 24
STL8:00 amLambert-St Louis
43h 55m
2 stops
STN9:55 amLondon Stansted
Oct 7
STN5:45 pmLondon Stansted
33h 36m
2 stops
STL9:21 pmLambert-St Louis
$1,202

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to London Stansted 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 16, 2026.
Use the filters below to find and compare flights from Illinois to London Stansted Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Fri 11/13

6:30 pm-11:15 pm

2 stops22h 45m

London Stansted

Fri 11/20

5:55 am-5:20 pm

2 stops17h 25m

$667

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Sat 10/24

7:30 pm-11:45 pm

2 stops22h 15m

London Stansted

Wed 10/28

6:10 am-7:25 pm

1 stop18h 15m

$668

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Thu 11/12

6:30 pm-9:55 pm

2 stops21h 25m

London Stansted

Mon 11/16

12:50 pm-5:20 pm

2 stops34h 30m

$669

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Mon 9/28

3:45 pm-12:50 pm

1 stop15h 05m

London Stansted

Mon 10/5

8:25 am-5:50 pm

2 stops39h 25m

$669

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Sun 11/1

6:30 pm-4:55 pm

2 stops16h 25m

London Stansted

Sun 11/8

8:15 am-5:20 pm

2 stops15h 05m

$670

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Thu 10/1

7:25 pm-10:25 pm

2 stops21h 00m

London Stansted

Wed 10/7

6:30 am-6:15 pm

2 stops17h 45m

$674

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Mon 10/26

7:30 pm-5:50 pm

2 stops17h 20m

London Stansted

Mon 11/2

11:35 am-5:20 pm

2 stops35h 45m

$674

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Tue 9/22

7:25 pm-10:20 pm

2 stops20h 55m

London Stansted

Wed 9/30

6:30 am-9:25 pm

2 stops20h 55m

$675
Quickest round-trip

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Sun 11/8

6:30 pm-3:40 pm

2 stops15h 10m

London Stansted

Tue 11/17

8:15 am-5:20 pm

2 stops15h 05m

$679

ChicagoLondon

ORD Chicago O'Hare Intl - STN London Stansted

ORDSTN

Chicago O'Hare Intl

Sun 11/1

7:15 pm-9:35 pm

2 stops20h 20m

London Stansted

Sun 11/8

3:45 pm-4:45 pm

3 stops31h 00m

$680

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 Stansted 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 airline that flies from Illinois to London Stansted?

Turkish Airlines is the most popular carrier operating from Illinois to London Stansted

Cheap Illinois to London Stansted Airport flight deals and tips

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

Fastest flight time

14h 05m

Direct flights

None
The fastest flight from Illinois to London Stansted Airport takes 14h 05m
There are no direct flights from Illinois to London Stansted Airport. There are no popular flight routes from Illinois to London Stansted Airport.
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Frequently asked questions about flying from Illinois to London Stansted Airport

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

    Prices for flights from Illinois to London Stansted Airport refresh daily.

  • How old do you have to be to fly from Illinois to London Stansted 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 Stansted Airport.

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

    The required travel and health documents for your London Stansted Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Stansted Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to London for you.

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

Yes. momondo allows you to filter the results for Illinois to London flights to just show those with flexible booking policies.

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?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Illinois and alert you when they change.

An easier way to manage your London Stansted Airport trip

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