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Cheap flights from Illinois to London from £438

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 14/8. 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
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Find the cheapest flights from Illinois to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
15:45 - 19:30
ORD
-
SOU
21h 45m
2 stops
Multiple Airlines Logo
20:00 - 16:57
SOU
-
ORD
26h 57m
2 stops
£597Multiple Airlines
Fri, 14 Aug - Fri, 21 Aug
Multiple Airlines Logo
15:45 - 16:50
ORD
-
SOU
19h 05m
2 stops
Multiple Airlines Logo
18:05 - 16:57
SOU
-
ORD
28h 52m
3 stops
£667Multiple Airlines
Fri, 14 Aug - Fri, 21 Aug
Aer Lingus Logo
15:45 - 08:05
ORD
-
SOU
10h 20m
1 stop
Aer Lingus Logo
09:15 - 19:15
SOU
-
ORD
16h 00m
1 stop
£690Aer Lingus
Tue, 11 Aug - Tue, 18 Aug
Multiple Airlines Logo
15:45 - 16:50
ORD
-
SOU
19h 05m
2 stops
Multiple Airlines Logo
20:00 - 14:55
SOU
-
ORD
24h 55m
2 stops
£699Multiple Airlines
Tue, 11 Aug - Tue, 18 Aug
Multiple Airlines Logo
21:00 - 19:30
ORD
-
SOU
16h 30m
1 stop
Multiple Airlines Logo
18:05 - 14:00
SOU
-
ORD
25h 55m
2 stops
£700Multiple Airlines
Fri, 14 Aug - Fri, 21 Aug
Multiple Airlines Logo
21:00 - 19:30
ORD
-
SOU
16h 30m
1 stop
Multiple Airlines Logo
18:05 - 14:00
SOU
-
ORD
25h 55m
2 stops
£701Multiple Airlines
Fri, 14 Aug - Fri, 21 Aug
Aer Lingus Logo
21:00 - 19:30
ORD
-
SOU
16h 30m
1 stop
Aer Lingus Logo
09:15 - 19:15
SOU
-
ORD
16h 00m
1 stop
£701Aer Lingus
Tue, 11 Aug - Tue, 18 Aug
KLM Logo
13:25 - 08:45
MDW
-
SOU
13h 20m
2 stops
KLM Logo
09:15 - 18:01
SOU
-
MDW
14h 46m
2 stops
£842KLM
Fri, 14 Aug - Fri, 21 Aug
KLM Logo
13:25 - 08:45
MDW
-
SOU
13h 20m
2 stops
KLM Logo
09:15 - 18:01
SOU
-
MDW
14h 46m
2 stops
£844KLM
Fri, 14 Aug - Fri, 21 Aug
Delta Logo
09:59 - 08:45
MDW
-
SOU
16h 46m
2 stops
Delta Logo
09:05 - 18:01
SOU
-
MDW
14h 56m
2 stops
£849Delta
Mon, 17 Aug - Mon, 31 Aug

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Aer Lingus flights from Illinois to Southampton

Our best Aer Lingus deals on Illinois to Southampton flight tickets
Aer Lingus
11 Aug
ORD15:45Chicago O'Hare Intl
10h 20m
1 stop
SOU08:05Southampton Eastleigh
18 Aug
SOU09:15Southampton Eastleigh
16h 00m
1 stop
ORD19:15Chicago O'Hare Intl
£690
Aer Lingus
11 Aug
ORD21:00Chicago O'Hare Intl
16h 30m
1 stop
SOU19:30Southampton Eastleigh
18 Aug
SOU09:15Southampton Eastleigh
16h 00m
1 stop
ORD19:15Chicago O'Hare Intl
£701
Aer Lingus
14 Aug
ORD21:00Chicago O'Hare Intl
13h 50m
1 stop
SOU16:50Southampton Eastleigh
21 Aug
SOU09:20Southampton Eastleigh
15h 55m
1 stop
ORD19:15Chicago O'Hare Intl
£710

KLM flights from Illinois to Southampton

Our best KLM deals on Illinois to Southampton flight tickets
KLM
14 Aug
MDW13:25Chicago Midway
13h 20m
2 stops
SOU08:45Southampton Eastleigh
21 Aug
SOU09:15Southampton Eastleigh
14h 46m
2 stops
MDW18:01Chicago Midway
£842
KLM
14 Aug
MDW13:25Chicago Midway
13h 20m
2 stops
SOU08:45Southampton Eastleigh
21 Aug
SOU09:15Southampton Eastleigh
14h 46m
2 stops
MDW18:01Chicago Midway
£844
KLM
10 Aug
ORD11:23Chicago O'Hare Intl
15h 22m
2 stops
SOU08:45Southampton Eastleigh
17 Aug
SOU18:05Southampton Eastleigh
26h 10m
1 stop
ORD14:15Chicago O'Hare Intl
£846

momondo Fare Finder

 
Customise your flight search to find flights from Illinois to Southampton 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 279,928 searches. Data last updated 1 July 2026.
Use the filters below to find and compare flights from Illinois to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Fri 14/8

15:45-19:30

2 stops21h 45m

Southampton Eastleigh

Fri 21/8

20:00-16:57

2 stops26h 57m

£597

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Fri 14/8

15:45-16:50

2 stops19h 05m

Southampton Eastleigh

Fri 21/8

18:05-16:57

3 stops28h 52m

£667
Fastest return journey

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Tue 11/8

15:45-08:05

1 stop10h 20m

Southampton Eastleigh

Tue 18/8

09:15-19:15

1 stop16h 00m

£690

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Tue 11/8

15:45-16:50

2 stops19h 05m

Southampton Eastleigh

Tue 18/8

20:00-14:55

2 stops24h 55m

£699

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Fri 14/8

21:00-19:30

1 stop16h 30m

Southampton Eastleigh

Fri 21/8

18:05-14:00

2 stops25h 55m

£700

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Fri 14/8

21:00-19:30

1 stop16h 30m

Southampton Eastleigh

Fri 21/8

18:05-14:00

2 stops25h 55m

£701

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Tue 11/8

21:00-19:30

1 stop16h 30m

Southampton Eastleigh

Tue 18/8

09:15-19:15

1 stop16h 00m

£701

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Fri 14/8

13:25-08:45

2 stops13h 20m

Southampton Eastleigh

Fri 21/8

09:15-18:01

2 stops14h 46m

£842

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Fri 14/8

13:25-08:45

2 stops13h 20m

Southampton Eastleigh

Fri 21/8

09:15-18:01

2 stops14h 46m

£844

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Mon 17/8

09:59-08:45

2 stops16h 46m

Southampton Eastleigh

Mon 31/8

09:05-18:01

2 stops14h 56m

£849

Flights are sorted by cheapest return 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 Southampton

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 Southampton Eastleigh?

Delta, KLM, and Aer Lingus are the most popular carriers operating from Illinois to Southampton Eastleigh

Which airlines fly to Southampton?

British Airways, Aer Lingus and United Airlines are the top three most popular airlines that fly to Southampton from Illinois according to our data. British Airways is the first choice among our users, with 46% of people opting to fly with this airline when travelling to Southampton. Keep in mind that there are 5 different airlines that fly to Southampton on a routine basis, so you have a few additional options to choose from.

Cheap Illinois to Southampton flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Southampton

Fastest flight time

10h 20m

Direct flights

None
The fastest flight from Illinois to Southampton takes 10h 20m
There are no direct flights from Illinois to Southampton. There are no popular flight routes from Illinois to Southampton.
Search flight deals

Frequently asked questions about flying from Illinois to Southampton

  • When did momondo last update prices for flights from Illinois to Southampton Eastleigh Airport?

    Prices for flights from Illinois to Southampton Eastleigh Airport are updated daily.

  • How old do you have to be to fly from Illinois to Southampton Eastleigh 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 Southampton Eastleigh Airport.

  • What documentation or ID do you need to fly to Southampton Eastleigh Airport?

    The travel and health documents required for your trip to Southampton Eastleigh Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Southampton Eastleigh Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Portsmouth

Why use momondo?

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

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

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

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

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

Once you have performed a search for Illinois to Southampton flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Southampton from Illinois are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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