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Cheap flights from Illinois to London from $378

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 8/4. 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
0 bags

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Find the cheapest flights from Illinois to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:45 pm - 8:40 am
ORD
-
SOU
10h 55m
1 stop
Multiple Airlines Logo
2:15 pm - 2:45 pm
SOU
-
ORD
30h 30m
2 stops
$964Multiple Airlines
Wed, Aug 5 - Tue, Aug 25
Aer Lingus Logo
11:45 am - 8:40 am
ORD
-
SOU
14h 55m
2 stops
Aer Lingus Logo
9:20 am - 7:15 pm
SOU
-
ORD
15h 55m
1 stop
$983Aer Lingus
Fri, Aug 7 - Sun, Aug 23
Aer Lingus Logo
3:45 pm - 4:50 pm
ORD
-
SOU
19h 05m
1 stop
Aer Lingus Logo
9:20 am - 7:52 pm
SOU
-
ORD
16h 32m
2 stops
$1,007Aer Lingus
Thu, Aug 6 - Sat, Aug 22
KLM Logo
4:20 pm - 8:45 am
ORD
-
SOU
10h 25m
1 stop
KLM Logo
5:20 pm - 2:15 pm
SOU
-
ORD
26h 55m
1 stop
$1,009KLM
Tue, Aug 25 - Mon, Sep 7
Multiple Airlines Logo
9:39 am - 8:40 am
ORD
-
SOU
17h 01m
2 stops
Multiple Airlines Logo
9:20 am - 7:34 pm
SOU
-
ORD
16h 14m
2 stops
$1,010Multiple Airlines
Fri, Aug 7 - Sun, Aug 23
Multiple Airlines Logo
10:56 am - 8:40 am
ORD
-
SOU
15h 44m
2 stops
Multiple Airlines Logo
9:20 am - 7:52 pm
SOU
-
ORD
16h 32m
2 stops
$1,011Multiple Airlines
Thu, Aug 6 - Sat, Aug 22
Multiple Airlines Logo
3:45 pm - 8:40 am
ORD
-
SOU
10h 55m
1 stop
Multiple Airlines Logo
2:15 pm - 2:45 pm
SOU
-
ORD
30h 30m
2 stops
$1,013Multiple Airlines
Fri, Aug 7 - Tue, Aug 25
KLM Logo
10:28 am - 8:45 am
ORD
-
SOU
16h 17m
2 stops
KLM Logo
5:20 pm - 2:15 pm
SOU
-
ORD
26h 55m
1 stop
$1,014KLM
Tue, Aug 25 - Mon, Sep 7
Delta Logo
6:45 pm - 4:50 pm
MDW
-
SOU
16h 05m
2 stops
Delta Logo
5:20 pm - 4:25 pm
SOU
-
MDW
29h 05m
2 stops
$1,026Delta
Sun, Oct 11 - Thu, Oct 15
Delta Logo
9:59 am - 8:45 am
MDW
-
SOU
16h 46m
2 stops
Delta Logo
6:05 pm - 4:15 pm
SOU
-
MDW
28h 10m
2 stops
$1,080Delta
Wed, Aug 5 - Tue, Aug 25

KLM flights from Illinois to Southampton

Our best KLM deals on Illinois to Southampton flight tickets
KLM
Aug 25
ORD4:20 pmChicago O'Hare Intl
10h 25m
1 stop
SOU8:45 amSouthampton Eastleigh
Sep 7
SOU5:20 pmSouthampton Eastleigh
26h 55m
1 stop
ORD2:15 pmChicago O'Hare Intl
$1,009
KLM
Aug 25
ORD10:28 amChicago O'Hare Intl
16h 17m
2 stops
SOU8:45 amSouthampton Eastleigh
Sep 7
SOU5:20 pmSouthampton Eastleigh
26h 55m
1 stop
ORD2:15 pmChicago O'Hare Intl
$1,014
KLM
Aug 25
ORD10:07 amChicago O'Hare Intl
16h 38m
2 stops
SOU8:45 amSouthampton Eastleigh
Sep 7
SOU5:20 pmSouthampton Eastleigh
26h 55m
1 stop
ORD2:15 pmChicago O'Hare Intl
$1,016

Delta flights from Illinois to Southampton

Our best Delta deals on Illinois to Southampton flight tickets
Delta
Oct 11
MDW6:45 pmChicago Midway
16h 05m
2 stops
SOU4:50 pmSouthampton Eastleigh
Oct 15
SOU5:20 pmSouthampton Eastleigh
29h 05m
2 stops
MDW4:25 pmChicago Midway
$1,026
Delta
Aug 5
ORD4:50 pmChicago O'Hare Intl
18h 45m
1 stop
SOU5:35 pmSouthampton Eastleigh
Aug 24
SOU6:05 pmSouthampton Eastleigh
26h 10m
1 stop
ORD2:15 pmChicago O'Hare Intl
$1,065
Delta
Aug 5
ORD5:20 pmChicago O'Hare Intl
18h 15m
2 stops
SOU5:35 pmSouthampton Eastleigh
Aug 24
SOU6:05 pmSouthampton Eastleigh
26h 10m
1 stop
ORD2:15 pmChicago O'Hare Intl
$1,070

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated May 17, 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 round-trip

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Wed 8/5

3:45 pm-8:40 am

1 stop10h 55m

Southampton Eastleigh

Tue 8/25

2:15 pm-2:45 pm

2 stops30h 30m

$964
Quickest round-trip

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Fri 8/7

11:45 am-8:40 am

2 stops14h 55m

Southampton Eastleigh

Sun 8/23

9:20 am-7:15 pm

1 stop15h 55m

$983

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Thu 8/6

3:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Sat 8/22

9:20 am-7:52 pm

2 stops16h 32m

$1,007

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Tue 8/25

4:20 pm-8:45 am

1 stop10h 25m

Southampton Eastleigh

Mon 9/7

5:20 pm-2:15 pm

1 stop26h 55m

$1,009

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Fri 8/7

9:39 am-8:40 am

2 stops17h 01m

Southampton Eastleigh

Sun 8/23

9:20 am-7:34 pm

2 stops16h 14m

$1,010

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Thu 8/6

10:56 am-8:40 am

2 stops15h 44m

Southampton Eastleigh

Sat 8/22

9:20 am-7:52 pm

2 stops16h 32m

$1,011

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Fri 8/7

3:45 pm-8:40 am

1 stop10h 55m

Southampton Eastleigh

Tue 8/25

2:15 pm-2:45 pm

2 stops30h 30m

$1,013

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Tue 8/25

10:28 am-8:45 am

2 stops16h 17m

Southampton Eastleigh

Mon 9/7

5:20 pm-2:15 pm

1 stop26h 55m

$1,014

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Sun 10/11

6:45 pm-4:50 pm

2 stops16h 05m

Southampton Eastleigh

Thu 10/15

5:20 pm-4:25 pm

2 stops29h 05m

$1,026

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Wed 8/5

9:59 am-8:45 am

2 stops16h 46m

Southampton Eastleigh

Tue 8/25

6:05 pm-4:15 pm

2 stops28h 10m

$1,080

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 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 month to fly to Southampton?

If you don’t want to visit Southampton in December, then you should wait until November to fly from Illinois, when ticket prices are also cheap, with an average price of $0.

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 25m

Direct flights

None
The fastest flight from Illinois to Southampton takes 10h 25m
There are no direct flights from Illinois to Southampton. There are no popular flight routes from Illinois to Southampton.
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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 refresh daily.

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

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

    The required travel and health documents for your Southampton Eastleigh 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 Southampton Eastleigh 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
Portsmouth

Why use momondo?

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

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 Southampton for you.

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?

If you are not ready to book a flight from Illinois to Southampton now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Southampton and let you know when they change.

An easier way to manage your Southampton trip

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