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Cheap flights from Illinois to London from $347

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 10/5. 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 - 7:20 pmORD  Chicago O'Hare Intl-SEN London Southend
18h 50m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
8:15 am - 5:20 pmSEN  London Southend-ORD Chicago O'Hare Intl
15h 05m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$848Multiple Airlines
Tue, Dec 8 - Tue, Dec 15
Multiple Airlines Logo
6:30 pm - 4:40 pmORD  Chicago O'Hare Intl-SEN London Southend
16h 10m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
8:15 am - 5:20 pmSEN  London Southend-ORD Chicago O'Hare Intl
15h 05m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$873Multiple Airlines
Wed, Dec 2 - Tue, Dec 8
Multiple Airlines Logo
6:30 pm - 2:50 pmORD  Chicago O'Hare Intl-SEN London Southend
14h 20m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
3:35 pm - 5:20 pmSEN  London Southend-ORD Chicago O'Hare Intl
31h 45m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$883Multiple Airlines
Sun, Nov 22 - Sun, Nov 29
Multiple Airlines Logo
6:30 pm - 2:50 pmORD  Chicago O'Hare Intl-SEN London Southend
14h 20m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
7:35 am - 5:20 pmSEN  London Southend-ORD Chicago O'Hare Intl
15h 45m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$896Multiple Airlines
Sun, Nov 8 - Fri, Nov 13
Multiple Airlines Logo
6:30 pm - 4:40 pmORD  Chicago O'Hare Intl-SEN London Southend
16h 10m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
3:35 pm - 5:20 pmSEN  London Southend-ORD Chicago O'Hare Intl
31h 45m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$897Multiple Airlines
Wed, Nov 25 - Sun, Nov 29
Multiple Airlines Logo
6:30 pm - 10:05 pmORD  Chicago O'Hare Intl-SEN London Southend
21h 35m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
3:35 pm - 5:20 pmSEN  London Southend-ORD Chicago O'Hare Intl
31h 45m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$909Multiple Airlines
Sat, Nov 28 - Sun, Dec 6
Multiple Airlines Logo
6:30 pm - 6:45 pmORD  Chicago O'Hare Intl-SEN London Southend
18h 15m2 stops Reykjavik Keflavik Intl Paris Charles de Gaulle
Multiple Airlines Logo
11:35 am - 2:00 pmSEN  London Southend-ORD Chicago O'Hare Intl
32h 25m2 stops Paris Charles de Gaulle Dublin
$936Multiple Airlines
Sat, Nov 14 - Mon, Nov 16
Multiple Airlines Logo
9:55 am - 10:45 amORD  Chicago O'Hare Intl-SEN London Southend
18h 50m3 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl Paris Charles de Gaulle
Multiple Airlines Logo
4:50 pm - 2:00 pmSEN  London Southend-ORD Chicago O'Hare Intl
27h 10m2 stops Barcelona-El Prat Dublin
$936Multiple Airlines
Thu, Sep 24 - Sat, Oct 10
Multiple Airlines Logo
6:30 pm - 2:50 pmORD  Chicago O'Hare Intl-SEN London Southend
14h 20m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
3:35 pm - 5:20 pmSEN  London Southend-ORD Chicago O'Hare Intl
31h 45m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$958Multiple Airlines
Sun, Nov 22 - Sun, Nov 29
Multiple Airlines Logo
6:30 pm - 2:50 pmORD  Chicago O'Hare Intl-SEN London Southend
14h 20m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
3:35 pm - 5:20 pmSEN  London Southend-ORD Chicago O'Hare Intl
31h 45m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$959Multiple Airlines
Sun, Nov 22 - Sun, Nov 29

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Customize your flight search to find flights from Illinois to London Southend 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 17, 2026.
Use the filters below to find and compare flights from Illinois to London Southend Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Tue 12/8

6:30 pm-7:20 pm

2 stops18h 50m

London Southend

Tue 12/15

8:15 am-5:20 pm

2 stops15h 05m

$848

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Wed 12/2

6:30 pm-4:40 pm

2 stops16h 10m

London Southend

Tue 12/8

8:15 am-5:20 pm

2 stops15h 05m

$873

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Sun 11/22

6:30 pm-2:50 pm

2 stops14h 20m

London Southend

Sun 11/29

3:35 pm-5:20 pm

2 stops31h 45m

$883
Quickest round-trip

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Sun 11/8

6:30 pm-2:50 pm

2 stops14h 20m

London Southend

Fri 11/13

7:35 am-5:20 pm

2 stops15h 45m

$896

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Wed 11/25

6:30 pm-4:40 pm

2 stops16h 10m

London Southend

Sun 11/29

3:35 pm-5:20 pm

2 stops31h 45m

$897

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Sat 11/28

6:30 pm-10:05 pm

2 stops21h 35m

London Southend

Sun 12/6

3:35 pm-5:20 pm

2 stops31h 45m

$909

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Sat 11/14

6:30 pm-6:45 pm

2 stops18h 15m

London Southend

Mon 11/16

11:35 am-2:00 pm

2 stops32h 25m

$936

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Thu 9/24

9:55 am-10:45 am

3 stops18h 50m

London Southend

Sat 10/10

4:50 pm-2:00 pm

2 stops27h 10m

$936

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Sun 11/22

6:30 pm-2:50 pm

2 stops14h 20m

London Southend

Sun 11/29

3:35 pm-5:20 pm

2 stops31h 45m

$958

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Sun 11/22

6:30 pm-2:50 pm

2 stops14h 20m

London Southend

Sun 11/29

3:35 pm-5:20 pm

2 stops31h 45m

$959

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 Southend 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

How long does it take to fly to London Southend Airport?

Flight times from Illinois to London Southend Airport vary, but if you’re flying out of Chicago and flying into London Heathrow Airport (one of the most popular routes), then the duration is 9h 17m on average. Another popular route from Illinois to London Southend Airport is flying from Peoria to London Heathrow Airport, which will take roughly 11h 20m. Keep in mind that layovers or delays could extend your travel time.

Cheap Illinois to London Southend Airport flight deals and tips

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

Best Price Found

$347

Fastest flight time

14h 00m

Direct flights

None
The best one-way flight to London Southend Airport from Illinois in the past 72 hours is $347. The best round-trip flight deal from Illinois to London Southend Airport found on momondo in the last 72 hours is $848.
The fastest flight from Illinois to London Southend Airport takes 14h 00m
There are no direct flights from Illinois to London Southend Airport. There are no popular flight routes from Illinois to London Southend Airport.
Search flight deals

Frequently asked questions about flying from Illinois to London Southend Airport

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to London Southend Airport.

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

    The required travel and health documents for your London Southend 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 Southend 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?

It is quick and easy to find Illinois to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits 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?

Once all potential Illinois to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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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