Find flights
When to book
FAQs

Cheap flights from Southampton to Illinois from £431

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 20/6. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — ORD
10 May — 17 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Southampton to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Southampton to Illinois
Explore the most affordable flight options available from Southampton to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 April 2026.

Thu 21/509:20
SOU
-
ORD
1 stop15h 55m
Aer Lingus
Thu 28/521:00
ORD
-
SOU
1 stop16h 30m
Aer Lingus
Deal found 6/4£619
Mon 31/817:20
SOU
-
ORD
1 stop26h 55m
Delta
Thu 10/916:20
ORD
-
SOU
1 stop10h 15m
Delta
Deal found 5/4£680
Sun 20/917:20
SOU
-
ORD
1 stop27h 10m
Delta
Thu 22/1016:20
ORD
-
SOU
1 stop10h 15m
Delta
Deal found 7/4£681
Wed 9/909:05
SOU
-
ORD
2 stops19h 01m
Delta
Mon 14/919:35
ORD
-
SOU
2 stops15h 15m
Delta
Deal found 6/4£684
Mon 31/817:20
SOU
-
ORD
2 stops30h 21m
Delta
Wed 9/913:30
ORD
-
SOU
2 stops21h 20m
Delta
Deal found 5/4£684
Wed 16/909:05
SOU
-
ORD
2 stops17h 19m
Delta
Wed 14/1005:30
ORD
-
SOU
2 stops21h 05m
Delta
Deal found 7/4£685
Wed 2/909:05
SOU
-
ORD
1 stop11h 25m
Delta
Thu 10/910:40
ORD
-
SOU
2 stops15h 55m
Delta
Deal found 5/4£701
Tue 1/909:05
SOU
-
ORD
2 stops17h 12m
Delta
Tue 8/915:35
ORD
-
SOU
2 stops19h 15m
Delta
Deal found 5/4£706
Sun 6/917:20
SOU
-
ORD
1 stop27h 10m
Delta
Sun 20/916:20
ORD
-
SOU
1 stop10h 15m
Delta
Deal found 6/4£710
Fri 22/509:20
SOU
-
ORD
1 stop15h 55m
Aer Lingus
Fri 29/521:00
ORD
-
SOU
1 stop13h 50m
Aer Lingus
Deal found 9/4£710
Thu 17/909:05
SOU
-
ORD
1 stop11h 10m
Delta
Thu 15/1016:20
ORD
-
SOU
1 stop10h 15m
Delta
Deal found 7/4£711
Sat 12/909:15
SOU
-
ORD
2 stops18h 21m
Delta
Wed 16/910:40
ORD
-
SOU
2 stops15h 55m
Delta
Deal found 6/4£713

Find flight deals from Southampton to Illinois

Keep the following information in mind while searching for Southampton to Illinois flight deals. Data was last updated 10 April 2026.

Round-trip from

£619

One-way from

£431

Popular in

July

Cheapest in

September

Average price

£530
Aer Lingus
  • Aer Lingus
  • 21/5-28/5
  • 2 total stops
  • 32h 25m total
  • Southampton to Illinois
Search Deals
20/6
  • 20/6
  • 3 total stops
  • 34h 00m total
  • Southampton to Illinois
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£52 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Southampton to Illinois 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 10 April 2026.
Use the filters below to find and compare flights from Southampton to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 7/9

17:20-14:15

1 stop26h 55m

Chicago O'Hare Intl

Mon 14/9

17:20-16:50

2 stops17h 30m

£680

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 21/9

17:20-14:15

1 stop26h 55m

Chicago O'Hare Intl

Tue 20/10

07:05-08:35

2 stops19h 30m

£681

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 31/8

17:20-14:15

1 stop26h 55m

Chicago O'Hare Intl

Tue 8/9

10:30-16:50

2 stops24h 20m

£701

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Fri 11/9

09:05-14:15

1 stop11h 10m

Chicago O'Hare Intl

Mon 14/9

19:35-16:50

2 stops15h 15m

£710

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Tue 8/9

09:05-14:15

1 stop11h 10m

Chicago O'Hare Intl

Sat 19/9

16:20-08:45

1 stop10h 25m

£710
Fastest return journey

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 10/9

09:05-14:15

1 stop11h 10m

Chicago O'Hare Intl

Thu 17/9

16:20-08:35

1 stop10h 15m

£769

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Tue 1/9

09:05-14:15

1 stop11h 10m

Chicago O'Hare Intl

Fri 11/9

16:20-08:45

1 stop10h 25m

£770

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 29/6

09:05-21:48

2 stops18h 43m

Chicago O'Hare Intl

Tue 28/7

19:17-17:35

2 stops16h 18m

£795

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 29/6

09:05-21:48

2 stops18h 43m

Chicago O'Hare Intl

Thu 30/7

16:20-08:45

1 stop10h 25m

£795

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 3/9

09:05-14:15

1 stop11h 10m

Chicago O'Hare Intl

Fri 11/9

16:20-08:45

1 stop10h 25m

£799

Flights are sorted by cheapest return flights first.

Deals found on 8/4

Showing 1-10 of 32 resultsSorted by cheapest first
1
2
3
4

Best time to book a flight from Southampton to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Southampton 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 Southampton to Illinois

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

Currently, December is the cheapest month in which you can book a flight from Southampton to Illinois (average of £209). Flying from Southampton to Illinois in July is currently the most expensive (average of £487). 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 Southampton to Illinois. 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 from for flights from Southampton to Illinois?

    Southampton Eastleigh (SOU), located 3.5 mi from the city center, is the airport you fly out of when you book flights from Southampton to Illinois.

  • How long is the flight from Southampton to Illinois?

    Departing from Southampton to Illinois will take you 15h 28m. The distance between Southampton and Illinois is about 3924 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Southampton to Illinois 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 Southampton to Illinois?

    Currently, December is the cheapest month in which you can book a flight from Southampton to Illinois (average of £209). Flying from Southampton to Illinois in July is currently the most expensive (average of £487). 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 Southampton to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Gatwick to John F Kennedy Intl flights
Heathrow to LaGuardia flights
Stansted to John F Kennedy Intl flights
Heathrow to Los Angeles flights
Heathrow to Orlando flights
London City to John F Kennedy Intl flights
Gatwick to Newark flights
Gatwick to LaGuardia flights
Luton to John F Kennedy Intl flights
Heathrow to Miami flights
Gatwick to Orlando flights
Stansted to Newark flights
Heathrow to San Francisco flights
Heathrow to Boston flights
Luton to Newark flights
Heathrow to Dallas/Fort Worth flights
Gatwick to Los Angeles flights
Manchester to Orlando flights
Heathrow to O'Hare Intl flights
Manchester to John F Kennedy Intl flights
Heathrow to Las Vegas flights
Heathrow to Seattle flights
Heathrow to Dulles Intl flights
London City to Newark flights
Gatwick to Boston flights
Heathrow to Hobby flights
Stansted to Los Angeles flights
Heathrow to Atlanta flights
Stansted to Orlando flights
London City to Los Angeles flights
Heathrow to Baltimore flights
London City to Orlando flights
Gatwick to Miami flights
Manchester to Newark flights
Heathrow to Tampa flights
Heathrow to George Bush Intcntl flights
Heathrow to Denver flights
Stansted to Miami flights
London City to Boston flights
Gatwick to San Francisco flights
Edinburgh to John F Kennedy Intl flights
Stansted to Boston flights
Heathrow to Ontario flights
London City to Miami flights
Manchester to LaGuardia flights
Luton to Los Angeles flights
Stansted to San Francisco flights
Stansted to LaGuardia 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 Southampton to Illinois?

Cheapflights helps you search for flights from Southampton to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights helps you find that perfect flight to Illinois from Southampton by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Southampton to Illinois flexibly with Cheapflights today.

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

Not ready to book yet? You can track prices for flights from Southampton to Illinois on Cheapflights with our Price Alert feature and get notified when better prices are available.

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.