In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

How far in advance should I book a flight from Southampton to Illinois?

Travelers have found it’s best to book a flight 45 days in advance to save up to 23% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 45 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Southampton to Illinois 1-2 weeks in advance for as low as £510, or £609 for flights within the next 24 hours.

What is the cheapest month to fly from Southampton to Illinois?

The best pricing can be found in the month of February. Prices to Illinois from Southampton average £513. You can even find prices in February for less than £513, as users have found deals to Illinois from as low as £312. The month of August appears to be one of the more expensive times to travel to Illinois from Southampton. Flying in the targeted month can save you up to 25%.

What is the cheapest time of day to fly from SOU to IL?

When flying from Southampton to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

£613+ Flights from Southampton to Illinois

Cheap flight deals from Southampton to Illinois

Round-trip from	£613
Popular in	August
Cheapest in	February
Average price	£640

Delta
6/10-27/10
2 total stops
21h 20m total
Southampton to Illinois

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£52 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Find flight deals from Southampton to Illinois

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 2 July 2025.

Mon 6/1017:35SOU - ORD

1 stop26h 35mDelta

Wed 29/1009:30ORD - SOU

2 stops17h 55mDelta

Deal found 1/7£613

Wed 6/809:20SOU - ORD

1 stop11h 20mKLM

Wed 13/811:00ORD - SOU

2 stops15h 45mKLM

Deal found 30/6£639

Thu 17/709:40SOU - ORD

2 stops17h 35mMultiple Airlines

Fri 25/719:25ORD - SOU

2 stops31h 10mMultiple Airlines

Deal found 2/7£754

Wed 16/709:20SOU - ORD

2 stops38h 51mVirgin Atlantic

Fri 25/719:59ORD - SOU

2 stops30h 46mVirgin Atlantic

Deal found 2/7£783

Wed 16/709:10SOU - ORD

1 stop15h 50mAer Lingus

Sat 19/718:25ORD - SOU

2 stops32h 45mAer Lingus

Deal found 2/7£915

Mon 4/809:20SOU - MDW

2 stops15h 20mKLM

Mon 8/913:08MDW - SOU

2 stops13h 42mKLM

Deal found 30/6£987

Best flights from Southampton to Illinois
Discover carefully curated flight deals from Southampton to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 July 2025.

Mon 6/1009:20SOU - ORD

1 stop11h 20mDelta

Mon 27/1017:25ORD - SOU

1 stop10h 00mDelta

Deal found 1/7£613

Wed 6/809:20SOU - ORD

1 stop11h 20mKLM

Wed 13/811:00ORD - SOU

2 stops15h 45mKLM

Deal found 30/6£639

Thu 17/709:40SOU - ORD

2 stops17h 35mMultiple Airlines

Fri 25/719:25ORD - SOU

2 stops31h 10mMultiple Airlines

Deal found 2/7£754

Wed 16/709:20SOU - ORD

2 stops38h 51mVirgin Atlantic

Fri 25/719:59ORD - SOU

2 stops30h 46mVirgin Atlantic

Deal found 2/7£783

Wed 16/709:10SOU - ORD

1 stop15h 50mAer Lingus

Sat 19/718:25ORD - SOU

2 stops32h 45mAer Lingus

Deal found 2/7£915

Mon 4/809:20SOU - MDW

2 stops15h 20mKLM

Mon 8/913:08MDW - SOU

2 stops13h 42mKLM

Deal found 30/6£987

Last-minute flights from Southampton to Illinois
Discover last-minute flight deals from Southampton to Illinois. Data last updated 2 July 2025 and is based on user searches.

Wed 16/709:20SOU - ORD

1 stop11h 20mDelta

Fri 25/717:39ORD - SOU

2 stops17h 21mDelta

Deal found 2/7£693

Wed 16/709:20SOU - ORD

2 stops38h 51mVirgin Atlantic

Fri 25/719:59ORD - SOU

2 stops30h 46mVirgin Atlantic

Deal found 2/7£783

Wed 16/709:10SOU - ORD

1 stop15h 50mAer Lingus

Sat 19/718:25ORD - SOU

2 stops32h 45mAer Lingus

Deal found 2/7£915

Thu 17/709:40SOU - ORD

2 stops17h 35mMultiple Airlines

Fri 25/719:25ORD - SOU

2 stops31h 10mMultiple Airlines

Deal found 2/7£754

Mon 4/809:20SOU - MDW

2 stops15h 20mKLM

Mon 8/913:08MDW - SOU

2 stops13h 42mKLM

Deal found 30/6£987

Wed 6/809:20SOU - ORD

1 stop11h 20mKLM

Wed 13/811:00ORD - SOU

2 stops15h 45mKLM

Deal found 30/6£639

Cheapflights Fare Finder

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

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Mon 6/10

17:35-14:10

1 stop26h 35m

Chicago O'Hare Intl

Wed 29/10

09:30-08:25

2 stops17h 55m

£613

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Wed 6/8

09:20-14:40

1 stop11h 20m

Chicago O'Hare Intl

Wed 13/8

16:50-08:45

1 stop9h 55m

£639

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Thu 17/7

09:40-21:15

2 stops17h 35m

Chicago O'Hare Intl

Fri 25/7

19:25-08:35

2 stops31h 10m

£754

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Wed 16/7

09:20-18:11

2 stops38h 51m

Chicago O'Hare Intl

Fri 25/7

19:59-08:45

2 stops30h 46m

£783

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Wed 16/7

09:10-19:00

1 stop15h 50m

Chicago O'Hare Intl

Sat 19/7

18:25-09:10

2 stops32h 45m

£915

SouthamptonChicago

SOU - MDW

SOUMDW

Southampton Eastleigh

Mon 4/8

09:20-18:40

2 stops15h 20m

Chicago Midway

Mon 8/9

13:08-08:50

2 stops13h 42m

£987

SouthamptonChicago

SOU - ORD

SOUORD

Southampton Eastleigh

Sun 20/7

17:35-14:10

1 stop26h 35m

£1,483

Flights are sorted by cheapest return flights first.

Deals found on 1/7

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, January is the cheapest month in which you can book a flight from Southampton to Illinois (average of £595). Flying from Southampton to Illinois in July is currently the most expensive (average of £843). 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.

Reviews of airlines servicing Illinois

See what other customers who have flown with Delta, KLM, andVirgin Atlantic from Southampton to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,974 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very Good

7,974 reviews

Delta

8.0

Very Good

7,974 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,366 reviews

Delta

8.0

Very Good

7,974 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Virgin Atlantic

7.4

Good

654 reviews

Delta

8.0

Very Good

7,974 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Aer Lingus

7.1

Good

1,141 reviews

Delta

8.0

Very Good

7,974 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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.
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, January is the cheapest month in which you can book a flight from Southampton to Illinois (average of £595). Flying from Southampton to Illinois in July is currently the most expensive (average of £843). 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

Alternative routes for Southampton to Illinois

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Complete your trip

Illinois car hire

Chicago O'Hare Intl Airport car hire

Chicago Midway Airport car hire

Moline Quad-City Airport car hire

Greater Peoria Airport car hire

Bloomington-Normal Airport car hire

Springfield Capital Airport car hire

Champaign University-Willard Airport car hire

Chicago Greater Rockford Airport car hire

Belleville Airport car hire

Marion Williamson County Airport car hire

Quincy Regional Airport car hire

Direct flights to United States

Fly with Cheapflights

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.

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Cheap flights from Southampton to Illinois from £613

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/10. Fares are subject to change and may not be available on all flights or dates of travel.

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 2 July 2025.

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Southampton to Illinois

Cheapest flights from Southampton to IllinoisExplore 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 2 July 2025.

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 2 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Southampton to Illinois that are best for you.

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.

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?

Reviews of airlines servicing Illinois

See what other customers who have flown with Delta, KLM, andVirgin Atlantic from Southampton to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

How can I find direct flights from Southampton to Illinois?

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

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

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.

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?

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 2 July 2025.