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Cheap flights from Illinois to Southampton from £372

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SOU
16 Oct — 23 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Illinois to Southampton

Keep the following information in mind while searching for Illinois to Southampton flight deals. Data was last updated 16 September 2025.

Round-trip from

£469

One-way from

£372

Popular in

June

Cheapest in

February

Average price

£485
Aer Lingus
  • Aer Lingus
  • 29/10-5/11
  • 2 total stops
  • 25h 25m total
  • Illinois to Southampton
Search Deals
Aer Lingus
  • Aer Lingus
  • 18/10
  • 1 total stop
  • 10h 50m total
  • Illinois to Southampton
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£112 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Illinois to Southampton

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 16 September 2025.

Wed 29/1020:40ORD - SOU
1 stop13h 55mAer Lingus
Wed 5/1112:25SOU - ORD
1 stop11h 30mAer Lingus
Deal found 14/9£469
Wed 29/1020:40ORD - SOU
1 stop13h 55mMultiple Airlines
Wed 5/1108:40SOU - ORD
2 stops15h 15mMultiple Airlines
Deal found 14/9£529
Wed 19/1116:25ORD - SOU
1 stop9h 55mDelta
Tue 25/1117:30SOU - ORD
1 stop26h 50mDelta
Deal found 15/9£542
Tue 2/1218:15ORD - SOU
2 stops16h 45mDelta
Wed 10/1208:40SOU - ORD
1 stop11h 40mDelta
Deal found 14/9£545
Tue 2/1218:15ORD - SOU
2 stops16h 45mDelta
Tue 9/1217:30SOU - ORD
2 stops30h 16mDelta
Deal found 14/9£552
Tue 2/1217:32MDW - SOU
2 stops17h 28mDelta
Wed 10/1208:40SOU - MDW
2 stops15h 38mDelta
Deal found 14/9£552
Wed 29/1006:00MDW - SOU
2 stops21h 20mKLM
Wed 5/1108:40SOU - MDW
2 stops19h 34mKLM
Deal found 14/9£564
Sun 16/1115:45ORD - SOU
2 stops19h 40mDelta
Wed 26/1108:40SOU - ORD
1 stop11h 40mDelta
Deal found 15/9£600
Mon 17/1116:25ORD - SOU
1 stop18h 35mDelta
Mon 24/1118:05SOU - ORD
2 stops28h 47mDelta
Deal found 15/9£605
Wed 19/1116:25ORD - SOU
1 stop9h 55mDelta
Fri 28/1108:40SOU - ORD
2 stops18h 56mDelta
Deal found 14/9£607
Fri 5/1216:25ORD - SOU
1 stop10h 25mDelta
Wed 10/1208:40SOU - ORD
1 stop11h 40mDelta
Deal found 14/9£608
Mon 17/1113:14MDW - SOU
2 stops12h 56mDelta
Tue 25/1108:40SOU - MDW
2 stops15h 38mDelta
Deal found 15/9£608

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 16 September 2025.
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

Sun 16/11

16:25-17:25

1 stop19h 00m

Southampton Eastleigh

Tue 25/11

17:30-14:20

1 stop26h 50m

£542

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Mon 17/11

16:25-17:00

1 stop18h 35m

Southampton Eastleigh

Wed 26/11

08:40-14:20

1 stop11h 40m

£542

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Wed 19/11

16:25-08:20

1 stop9h 55m

Southampton Eastleigh

Tue 25/11

17:30-14:20

1 stop26h 50m

£542

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Mon 17/11

16:25-17:00

1 stop18h 35m

Southampton Eastleigh

Tue 25/11

17:30-14:20

1 stop26h 50m

£542

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Tue 2/12

18:15-17:00

2 stops16h 45m

Southampton Eastleigh

Wed 10/12

08:40-14:20

1 stop11h 40m

£545

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Tue 2/12

18:15-17:00

2 stops16h 45m

Southampton Eastleigh

Tue 9/12

17:30-14:20

1 stop26h 50m

£545

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Tue 2/12

17:32-17:00

2 stops17h 28m

Southampton Eastleigh

Wed 10/12

08:40-18:18

2 stops15h 38m

£552

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Tue 2/12

17:32-17:00

2 stops17h 28m

Southampton Eastleigh

Mon 8/12

18:05-18:18

2 stops30h 13m

£552

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Tue 2/12

17:32-17:00

2 stops17h 28m

Southampton Eastleigh

Tue 9/12

08:40-18:00

2 stops15h 20m

£552

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Tue 18/11

09:46-08:10

2 stops16h 24m

Southampton Eastleigh

Wed 26/11

17:30-16:36

2 stops29h 06m

£552

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 23 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, September is the cheapest month in which you can book a flight from Illinois to Southampton (average of £203). Flying from Illinois to Southampton in November is currently the most expensive (average of £262). 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 19h. Delta provides one of the quickest options available for as low as £542. 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, September is the cheapest month in which you can book a flight from Illinois to Southampton (average of £203). Flying from Illinois to Southampton in November is currently the most expensive (average of £262). 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

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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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