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Cheap flights from Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:25 pm - 7:35 pmORD  Chicago O'Hare Intl-SEN London Southend
15h 10m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
7:00 am - 7:15 pmSEN  London Southend-ORD Chicago O'Hare Intl
18h 15m2 stops Malaga Dublin
$808Multiple Airlines
Sun, Oct 4 - Tue, Oct 13
Multiple Airlines Logo
10:25 pm - 7:35 pmORD  Chicago O'Hare Intl-SEN London Southend
15h 10m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
8:25 pm - 2:15 pmSEN  London Southend-ORD Chicago O'Hare Intl
47h 50m3 stops Palma de Mallorca Son Sant Joan Barcelona-El Prat Amsterdam Schiphol
$817Multiple Airlines
Sun, Oct 4 - Tue, Oct 13
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 - 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
7:25 pm - 7:35 pmORD  Chicago O'Hare Intl-SEN London Southend
18h 10m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
3:30 pm - 4:30 pmSEN  London Southend-ORD Chicago O'Hare Intl
30h 00m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$898Multiple Airlines
Thu, Oct 22 - Tue, Oct 27
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
$906Multiple Airlines
Sat, Nov 21 - Sun, Nov 29
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
$934Multiple Airlines
Tue, Dec 8 - Tue, Dec 15
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 - 5:15 pmORD  Chicago O'Hare Intl-SEN London Southend
16h 45m2 stops Reykjavik Keflavik Intl Paris Charles de Gaulle
Multiple Airlines Logo
7:10 pm - 5:20 pmSEN  London Southend-ORD Chicago O'Hare Intl
28h 10m3 stops Edinburgh Turnhouse Gdansk Rebiechowo Reykjavik Keflavik Intl
$1,007Multiple Airlines
Thu, Dec 17 - Thu, Jan 7

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Customize your flight search to find flights from Chicago O'Hare Intl Airport 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 14, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport 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

Sun 10/4

10:25 pm-7:35 pm

2 stops15h 10m

London Southend

Tue 10/13

7:00 am-7:15 pm

2 stops18h 15m

$808

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Sun 10/4

10:25 pm-7:35 pm

2 stops15h 10m

London Southend

Tue 10/13

8:25 pm-2:15 pm

3 stops47h 50m

$817

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
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

Thu 10/22

7:25 pm-7:35 pm

2 stops18h 10m

London Southend

Tue 10/27

3:30 pm-4:30 pm

2 stops30h 00m

$898

ChicagoLondon

ORD Chicago O'Hare Intl - SEN London Southend

ORDSEN

Chicago O'Hare Intl

Sat 11/21

6:30 pm-10:05 pm

2 stops21h 35m

London Southend

Sun 11/29

3:35 pm-5:20 pm

2 stops31h 45m

$906

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

$934

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

Thu 12/17

6:30 pm-5:15 pm

2 stops16h 45m

London Southend

Thu 1/7

7:10 pm-5:20 pm

3 stops28h 10m

$1,007

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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When to book flights from Chicago O'Hare Intl Airport to London Southend Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to London Southend Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago O'Hare Intl Airport to London Southend Airport (ORD to SEN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to London Southend Airport

Fastest flight time

14h 20m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to London Southend Airport takes 14h 20m
There are no direct flights from Chicago O'Hare Intl Airport to London Southend Airport. There are no popular flight routes from Chicago O'Hare Intl Airport to London Southend Airport.
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Frequently asked questions about flying from Chicago O'Hare Intl Airport to London Southend Airport

  • How far is Chicago O'Hare Intl to London Southend by plane?

    London Southend is 3979.6 mi away from Chicago O'Hare Intl. Typically, this will take 14h 20m by plane in normal conditions.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to London Southend Airport?

    Prices for flights from Chicago O'Hare Intl Airport to London Southend Airport refresh daily.

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to London Southend 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 Chicago O'Hare Intl Airport 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.

Frequently asked questions about flying from Chicago O'Hare Intl Airport to London Southend Airport

  • How do I get Price Alerts for flights from Chicago O'Hare Intl Airport to London Southend Airport?

    Confirm your travel details to search for the latest offers for flights from Chicago O'Hare Intl Airport to London Southend Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Chicago O'Hare Intl Airport to London Southend Airport with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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 Chicago to London?

Finding the right flight to London from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

Flights from Chicago to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Chicago.

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

Yes momondo offers price alerts on flights to London from Chicago. 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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