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Cheap flights from Southampton to Illinois from £428

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 29/10. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — ORD
16 Nov — 23 Nov1
1 adult
1 adult, Economy

Find 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 17 October 2025.

Mon 1/1209:30SOU - ORD
1 stop14h 25mAer Lingus
Mon 8/1219:40ORD - SOU
1 stop13h 55mAer Lingus
Deal found 16/10£497
Mon 1/1219:40SOU - ORD
2 stops28h 15mMultiple Airlines
Mon 8/1221:45ORD - SOU
2 stops15h 55mMultiple Airlines
Deal found 16/10£636
Sat 29/1109:30SOU - ORD
1 stop14h 25mAer Lingus
Sat 6/1215:50ORD - SOU
1 stop10h 55mAer Lingus
Deal found 15/10£717
Thu 20/1109:30SOU - ORD
1 stop14h 25mBritish Airways
Mon 24/1119:40ORD - SOU
1 stop10h 15mBritish Airways
Deal found 16/10£720
Sat 29/1117:30SOU - ORD
2 stops30h 25mMultiple Airlines
Sat 6/1215:50ORD - SOU
1 stop10h 55mMultiple Airlines
Deal found 15/10£756
Mon 1/1218:10SOU - ORD
3 stops25h 40mBritish Airways
Mon 8/1221:45ORD - SOU
2 stops16h 35mBritish Airways
Deal found 16/10£781
Fri 7/1109:30SOU - ORD
1 stop14h 25mBritish Airways
Fri 14/1115:50ORD - SOU
1 stop10h 55mBritish Airways
Deal found 15/10£848
Mon 1/1208:40SOU - MDW
2 stops21h 00mKLM
Mon 8/1213:14MDW - SOU
2 stops12h 56mKLM
Deal found 16/10£934
Thu 6/1119:55SOU - ORD
2 stops23h 55mBritish Airways
Fri 14/1115:50ORD - SOU
1 stop10h 55mBritish Airways
Deal found 15/10£963
Sat 29/1109:25SOU - MDW
2 stops20h 15mVirgin Atlantic
Sat 6/1209:29MDW - SOU
2 stops17h 21mVirgin Atlantic
Deal found 15/10£992

Cheap flight deals from Southampton to Illinois

Keep the following information in mind while searching for Southampton to Illinois flight deals. Data was last updated 17 October 2025.

Round-trip from

£497

One-way from

£428

Popular in

July

Cheapest in

February

Average price

£536
Aer Lingus
  • Aer Lingus
  • 1/12-8/12
  • 2 total stops
  • 28h 20m total
  • Southampton to Illinois
Search Deals
29/10
  • 29/10
  • 3 total stops
  • 45h 16m total
  • Southampton to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£61 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 October 2025
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 17 October 2025.
Use the filters below to find and compare flights from Southampton to Illinois that are best for you.

Fly from

Southampton

Fly to

Illinois

Route

Depart

Return

Price

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 1/12

09:30-17:55

1 stop14h 25m

Chicago O'Hare Intl

Mon 8/12

19:40-15:35

1 stop13h 55m

£497

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 1/12

19:40-17:55

2 stops28h 15m

Chicago O'Hare Intl

Mon 8/12

21:45-19:40

2 stops15h 55m

£636

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 5/3

18:05-14:20

1 stop26h 15m

Chicago O'Hare Intl

Mon 9/3

14:10-08:10

2 stops37h 00m

£657

SouthamptonChicago

SOU - MDW

SOUMDW

Southampton Eastleigh

Thu 5/3

08:50-18:34

2 stops15h 44m

Chicago Midway

Mon 9/3

17:59-08:10

2 stops33h 11m

£660

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sat 29/11

09:30-17:55

1 stop14h 25m

Chicago O'Hare Intl

Sat 6/12

15:50-08:45

1 stop10h 55m

£717

SouthamptonChicago

SOU - MDW

SOUMDW

Southampton Eastleigh

Mon 1/12

08:40-23:40

2 stops21h 00m

Chicago Midway

Mon 8/12

13:14-08:10

2 stops12h 56m

£934

SouthamptonChicago

SOU - MDW

SOUMDW

Southampton Eastleigh

Sat 29/11

09:25-23:40

2 stops20h 15m

Chicago Midway

Sat 6/12

09:29-08:50

2 stops17h 21m

£992

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Wed 22/10

09:10-19:00

1 stop15h 50m

£783

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sun 26/10

20:10-18:55

1 stop27h 45m

£787

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sat 25/10

16:25-18:55

1 stop32h 30m

£829

Flights are sorted by cheapest return flights first.

Deals found on 15/10

Showing 1-10 of 13 results
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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, September is the cheapest month in which you can book a flight from Southampton to Illinois (average of £152). Flying from Southampton to Illinois in July is currently the most expensive (average of £501). 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 14h 25m. The distance between Southampton and Illinois is about 3921 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, September is the cheapest month in which you can book a flight from Southampton to Illinois (average of £152). Flying from Southampton to Illinois in July is currently the most expensive (average of £501). 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

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Alternative routes for Southampton to Illinois

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Fly with Cheapflights

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

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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.

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