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Cheap flights from Cardiff to Illinois from £619

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — ORD
10 Sep — 17 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cardiff to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Cardiff to Illinois
Explore the most affordable flight options available from Cardiff to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 August 2026.

Thu 10/911:35 -
1 stop14h 13m
Wed 16/919:25 -
2 stops21h 00m
Deal found 7/8£619
Mon 12/1013:35 -
2 stops35h 40m
Sun 18/1021:00 -
1 stop18h 45m
Deal found 9/8£649
Thu 10/909:45 -
2 stops18h 59m
Wed 16/919:01 -
2 stops15h 44m
Deal found 8/8£685
Mon 12/1017:15 -
2 stops30h 45m
Sun 18/1018:44 -
2 stops32h 31m
Deal found 9/8£694
Thu 10/909:45 -
2 stops18h 59m
Wed 16/919:01 -
2 stops15h 44m
Deal found 8/8£697
Sat 15/809:50 -
2 stops18h 46m
Sun 23/818:42 -
2 stops16h 03m
Deal found 7/8£1,483
Tue 11/817:15 -
2 stops31h 18m
Fri 21/809:59 -
2 stops25h 06m
Deal found 8/8£1,524
Tue 11/809:45 -
2 stops18h 51m
Fri 21/819:25 -
2 stops15h 40m
Deal found 7/8£1,575
Sat 15/809:50 -
2 stops38h 11m
Sun 23/813:51 -
2 stops20h 54m
Deal found 9/8£1,598
Sat 15/809:50 -
2 stops18h 46m
Sun 23/819:25 -
2 stops15h 20m
Deal found 10/8£1,610

Find flight deals from Cardiff to Illinois

Keep the following information in mind while searching for Cardiff to Illinois flight deals. Data was last updated 11 August 2026.

Round-trip from

£619
10/9-16/9
  • 10/9-16/9
  • 3 total stops
  • 35h 13m total
  • Cardiff to Illinois
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cardiff 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 11 August 2026.
Use the filters below to find and compare flights from Cardiff to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Thu 10/9

11:35-19:48

1 stop14h 13m

Chicago O'Hare Intl

Wed 16/9

19:25-22:25

2 stops21h 00m

£620

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Mon 12/10

13:35-16:10

3 stops32h 35m

Chicago O'Hare Intl

Sun 18/10

19:15-09:15

3 stops32h 00m

£653

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Thu 10/9

17:15-14:15

1 stop27h 00m

Chicago O'Hare Intl

Wed 16/9

16:50-16:45

1 stop17h 55m

£669

CardiffChicago

CWL Cardiff Wales - MDW Chicago Midway

CWLMDW

Cardiff Wales

Thu 10/9

09:45-22:44

2 stops18h 59m

Chicago Midway

Wed 16/9

19:01-16:45

2 stops15h 44m

£685

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Thu 10/9

17:15-14:15

1 stop27h 00m

Chicago O'Hare Intl

Wed 16/9

16:50-16:45

1 stop17h 55m

£689

CardiffChicago

CWL Cardiff Wales - MDW Chicago Midway

CWLMDW

Cardiff Wales

Mon 12/10

17:15-18:00

2 stops30h 45m

Chicago Midway

Sun 18/10

18:44-09:15

2 stops32h 31m

£694
Fastest return journey

CardiffChicago

CWL Cardiff Wales - MDW Chicago Midway

CWLMDW

Cardiff Wales

Thu 10/9

09:45-22:44

2 stops18h 59m

Chicago Midway

Wed 16/9

19:01-16:45

2 stops15h 44m

£697

Flights are sorted by cheapest return flights first.

Deals found on 8/8

Sorted by cheapest first

Best time to book a flight from Cardiff to Illinois

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

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 11 August 2026.
Get a feel of what it's like to fly with KLM from Cardiff to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,556 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Food

7.3

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
KLM
7.8
Good
1,556 reviews
KLM
7.8
Good
1,556 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Food

7.3

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.

Related info for your journey

Find useful and relevant information for your journey from Cardiff 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 Cardiff to Illinois?

    If you book a flight to Illinois from Cardiff, you will be flying from Cardiff Wales, which is the city’s only airport. Cardiff Wales (CWL) is located 9.1 mi from the center of Cardiff.

  • How long is the flight from Cardiff to Illinois?

    There are many flights that can get you from Cardiff to Illinois in 18h 59m. Fly via KLM or Delta to get the fastest option. The distance between Cardiff and Illinois is about 3833 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 Cardiff to Illinois that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Cardiff 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.

See more FAQs

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Alternative routes for Cardiff to Illinois

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Top airline flying from Cardiff to Illinois

Discover the top airline that operate flights from Cardiff to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 11 August 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£694Average£697FlexibilityNo cancel feeOn-time75%
Search KLM 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 Cardiff to Illinois?

Deals for Cardiff to Illinois flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Cardiff to Illinois.

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

Certainly. Search results for flights to Illinois from Cardiff shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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