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Cheap flights from Illinois to Southampton from £340

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SOU
28 Feb — 7 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Southampton

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Southampton
Explore the most affordable flight options available from Illinois to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 January 2026.

Tue 1/916:20
ORD
-
SOU
1 stop18h 30m
KLM
Tue 15/909:05
SOU
-
ORD
1 stop11h 10m
KLM
Deal found 27/1£573
Thu 26/210:36
ORD
-
SOU
2 stops15h 44m
KLM
Thu 5/318:05
SOU
-
ORD
1 stop26h 15m
KLM
Deal found 27/1£602
Thu 26/209:50
MDW
-
SOU
2 stops16h 30m
Delta
Thu 5/308:50
SOU
-
MDW
2 stops19h 41m
Delta
Deal found 27/1£650
Fri 7/809:30
ORD
-
SOU
2 stops17h 15m
Virgin Atlantic
Fri 21/809:15
SOU
-
ORD
1 stop11h 00m
Virgin Atlantic
Deal found 28/1£690
Fri 7/816:20
ORD
-
SOU
1 stop10h 25m
KLM
Fri 21/809:15
SOU
-
ORD
1 stop11h 00m
KLM
Deal found 28/1£698
Tue 1/913:35
ORD
-
SOU
2 stops19h 25m
Multiple Airlines
Tue 15/920:00
SOU
-
ORD
3 stops46h 40m
Multiple Airlines
Deal found 27/1£702
Thu 26/221:00
ORD
-
SOU
1 stop29h 45m
Aer Lingus
Thu 5/320:10
SOU
-
ORD
1 stop29h 05m
Aer Lingus
Deal found 27/1£719
Fri 7/816:46
ORD
-
SOU
2 stops17h 49m
Aer Lingus
Fri 21/809:10
SOU
-
ORD
2 stops16h 35m
Aer Lingus
Deal found 28/1£722
Wed 18/317:25
ORD
-
SOU
1 stop19h 00m
Delta
Fri 27/308:50
SOU
-
ORD
1 stop11h 30m
Delta
Deal found 28/1£787
Tue 1/917:25
MDW
-
SOU
2 stops17h 25m
Delta
Tue 15/909:05
SOU
-
MDW
2 stops18h 41m
Delta
Deal found 27/1£1,206
Fri 13/318:07
MDW
-
SOU
2 stops17h 53m
Delta
Fri 20/308:50
SOU
-
MDW
2 stops14h 50m
Delta
Deal found 27/1£1,735
Sat 18/718:45
MDW
-
SOU
2 stops16h 15m
KLM
Sat 1/809:15
SOU
-
MDW
2 stops18h 31m
KLM
Deal found 28/1£2,447

Find flight deals from Illinois to Southampton

Keep the following information in mind while searching for Illinois to Southampton flight deals. Data was last updated 29 January 2026.

Round-trip from

£602

One-way from

£340

Popular in

June

Cheapest in

April

Average price

£483
KLM
  • KLM
  • 26/2-5/3
  • 3 total stops
  • 41h 59m total
  • Illinois to Southampton
Search Deals
Delta
  • Delta
  • 28/4
  • 1 total stop
  • 10h 15m total
  • Illinois to Southampton
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£106 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights 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, Cheapflights users made 858,174 searches. Data last updated 29 January 2026.
Use the filters below to find and compare flights from Illinois to Southampton that are best for you.

Fly from

Illinois

Fly to

Southampton

Route

Depart

Return

Price

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Thu 26/2

10:36-08:20

2 stops15h 44m

Southampton Eastleigh

Thu 5/3

18:05-14:20

1 stop26h 15m

£602

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Thu 26/2

09:50-08:20

2 stops16h 30m

Southampton Eastleigh

Thu 5/3

08:50-22:31

2 stops19h 41m

£650

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Wed 18/3

17:25-17:25

1 stop19h 00m

Southampton Eastleigh

Fri 27/3

08:50-15:20

1 stop11h 30m

£787

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Wed 18/3

17:25-08:20

1 stop9h 55m

Southampton Eastleigh

Thu 26/3

08:50-21:49

2 stops41h 59m

£795

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Sat 18/7

15:34-19:30

2 stops21h 56m

Southampton Eastleigh

Sat 1/8

09:10-20:02

2 stops16h 52m

£847

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Fri 13/3

18:16-14:50

2 stops15h 34m

Southampton Eastleigh

Fri 20/3

19:50-00:07

3 stops33h 17m

£868

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Fri 13/3

17:25-08:50

1 stop10h 25m

Southampton Eastleigh

Fri 20/3

08:50-15:20

1 stop11h 30m

£869

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Fri 13/3

18:07-17:00

2 stops17h 53m

Southampton Eastleigh

Fri 20/3

08:50-18:40

2 stops14h 50m

£1,735

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Sat 18/7

18:45-17:00

2 stops16h 15m

Southampton Eastleigh

Sat 1/8

09:15-21:46

2 stops18h 31m

£2,447

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Wed 29/4

16:50-16:50

1 stop18h 00m

£340

Flights are sorted by cheapest return flights first.

Deals found on 27/1

Showing 1-10 of 18 results
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Best time to book a flight from Illinois to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Illinois with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Southampton

What is the cheapest month to book a flight from Illinois to Southampton?

Currently, June is the cheapest month in which you can book a flight from Illinois to Southampton (average of £272). Flying from Illinois to Southampton in July is currently the most expensive (average of £441). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Southampton. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Southampton from Illinois?

    Most people fly into Southampton Eastleigh (SOU) if they book a flight to Southampton from Illinois. Eastleigh is conveniently located just 3.5 mi from Southampton’s city center.

  • How long is the flight from Illinois to Southampton?

    A quick flight from Illinois to Southampton can take about 15h 44m. KLM provides one of the quickest options available for as low as £602. Illinois and Southampton are separated by a distance of 3921 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Illinois to Southampton that include hotel bookings?

    Yes. In addition to deals on Illinois to Southampton flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Southampton?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Southampton.

  • Can I find deals for business class flights from Illinois to Southampton?

    Yes. Cheapflights offers flight deals from Illinois to Southampton by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Southampton?

    Currently, June is the cheapest month in which you can book a flight from Illinois to Southampton (average of £272). Flying from Illinois to Southampton in July is currently the most expensive (average of £441). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Southampton

See prices for flight routes from nearby airports that may be better suited for you.
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How does Cheapflights help users find flights from Illinois to Southampton?

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Can Cheapflights find flights from Illinois to Southampton with no change fees?

Need flexible booking options for your flight to Southampton from Illinois? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Illinois to Southampton become cheaper?

Yes, Cheapflights offers price alerts on Illinois to Southampton flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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