Find flights
When to book
FAQs

Cheap flights from Illinois to Southampton from £234

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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SOU
25 Dec — 1 Jan1
1 adult
1 adult, Economy, 0 bags

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 25 November 2025.

Round-trip from

£550

One-way from

£234

Popular in

June

Cheapest in

February

Average price

£521
Aer Lingus
  • Aer Lingus
  • 14/1-22/1
  • 2 total stops
  • 28h 20m total
  • Illinois to Southampton
Search Deals
10/5
  • 10/5
  • 2 total stops
  • 16h 15m total
  • Illinois to Southampton
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£119 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find 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 25 November 2025.

Wed 26/1116:25ORD - SOU
1 stop9h 55mDelta
Mon 1/1218:05SOU - ORD
2 stops29h 41mDelta
Deal found 21/11£594
Tue 25/1106:45ORD - SOU
2 stops19h 25mDelta
Mon 1/1218:05SOU - ORD
2 stops29h 41mDelta
Deal found 21/11£597
Mon 22/1218:02ORD - SOU
2 stops32h 08mDelta
Thu 8/117:35SOU - ORD
2 stops30h 10mDelta
Deal found 23/11£633
Mon 22/1218:02ORD - SOU
2 stops32h 08mDelta
Tue 6/117:35SOU - ORD
1 stop26h 45mDelta
Deal found 23/11£668
Mon 22/1218:02ORD - SOU
2 stops32h 08mDelta
Sun 11/117:45SOU - ORD
2 stops30h 00mDelta
Deal found 23/11£671
Fri 26/1216:25ORD - SOU
1 stop10h 25mDelta
Thu 8/117:35SOU - ORD
2 stops30h 10mDelta
Deal found 23/11£693
Mon 22/1218:02ORD - SOU
2 stops32h 08mDelta
Sat 10/109:25SOU - ORD
1 stop10h 55mDelta
Deal found 23/11£711
Fri 26/1216:25ORD - SOU
1 stop10h 25mDelta
Tue 6/117:35SOU - ORD
1 stop26h 45mDelta
Deal found 23/11£724
Fri 26/1216:25ORD - SOU
1 stop10h 25mDelta
Sun 11/117:45SOU - ORD
2 stops30h 00mDelta
Deal found 23/11£731

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 25 November 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

Thu 8/1

11:05-08:25

2 stops15h 20m

Southampton Eastleigh

Thu 15/1

17:35-14:20

1 stop26h 45m

£626

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Sun 22/3

17:25-08:20

1 stop9h 55m

Southampton Eastleigh

Sun 29/3

17:20-16:43

2 stops29h 23m

£630

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Sun 22/3

17:25-08:20

1 stop9h 55m

Southampton Eastleigh

Sat 28/3

17:30-16:43

2 stops28h 13m

£630

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Mon 22/12

18:02-08:10

2 stops32h 08m

Southampton Eastleigh

Thu 8/1

17:35-17:45

2 stops30h 10m

£633

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Mon 22/12

18:02-08:10

2 stops32h 08m

Southampton Eastleigh

Sun 11/1

17:45-17:45

2 stops30h 00m

£671

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Mon 22/12

18:02-08:10

2 stops32h 08m

Southampton Eastleigh

Tue 6/1

17:35-17:45

2 stops30h 10m

£672

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Thu 8/1

09:32-08:25

2 stops16h 53m

Southampton Eastleigh

Thu 15/1

09:00-18:32

2 stops15h 32m

£677

ChicagoSouthampton

MDW - SOU

MDWSOU

Chicago Midway

Fri 16/1

09:32-08:45

2 stops17h 13m

Southampton Eastleigh

Tue 20/1

09:25-22:22

2 stops42h 57m

£681

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Fri 26/12

16:25-08:50

1 stop10h 25m

Southampton Eastleigh

Thu 8/1

17:35-17:45

2 stops30h 10m

£693

ChicagoSouthampton

ORD - SOU

ORDSOU

Chicago O'Hare Intl

Sat 21/3

17:25-08:50

1 stop10h 25m

Southampton Eastleigh

Sun 29/3

17:20-18:42

2 stops31h 22m

£713

Flights are sorted by cheapest return flights first.

Deals found on 22/11

Showing 1-10 of 14 results
1
2

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, May is the cheapest month in which you can book a flight from Illinois to Southampton (average of £301). Flying from Illinois to Southampton in July is currently the most expensive (average of £463). 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 9h 55m. KLM provides one of the quickest options available for as low as £630. 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, May is the cheapest month in which you can book a flight from Illinois to Southampton (average of £301). Flying from Illinois to Southampton in July is currently the most expensive (average of £463). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Southampton

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Gatwick flights
Newark to Gatwick flights
LaGuardia to Heathrow flights
Los Angeles to Heathrow flights
John F Kennedy Intl to London City flights
Boston to Heathrow flights
LaGuardia to Gatwick flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to Stansted flights
San Francisco to Heathrow flights
O'Hare Intl to Heathrow flights
Newark to London City flights
Baltimore to Heathrow flights
Dallas/Fort Worth to Heathrow flights
Seattle to Heathrow flights
Newark to Luton flights
Newark to Stansted flights
Boston to Gatwick flights
Hobby to Heathrow flights
Boston to London City flights
Orlando to Heathrow flights
Miami to Heathrow flights
Atlanta to Heathrow flights
Dulles Intl to Gatwick flights
Reagan-National to Heathrow flights
Denver to Heathrow flights
Los Angeles to Gatwick flights
Dulles Intl to London City flights
George Bush Intcntl to Heathrow flights
Los Angeles to London City flights
San Francisco to Gatwick flights
Newark to Edinburgh flights
Philadelphia to Heathrow flights
Minneapolis to Heathrow flights
Boston to Stansted flights
Baltimore to Gatwick flights
Reagan-National to Gatwick flights
Boston to Luton flights
O'Hare Intl to Gatwick flights
San Francisco to London City flights
John F Kennedy Intl to Edinburgh flights
Raleigh to Heathrow flights
O'Hare Intl to London City flights
Detroit to Heathrow flights
Dallas/Fort Worth to Gatwick flights
Charlotte to Heathrow flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Illinois to Southampton?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Southampton from Illinois today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Illinois to Southampton?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Southampton from Illinois.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.