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Cheap flights from Cardiff to Illinois from £349

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — ORD
24 Apr — 1 May1
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 25 March 2026.

Tue 2/623:15
CWL
-
ORD
2 stops25h 00m
Multiple Airlines
Tue 16/617:30
ORD
-
CWL
3 stops34h 45m
Multiple Airlines
Deal found 24/3£644
Tue 21/417:15
CWL
-
ORD
1 stop27h 15m
KLM
Tue 28/416:20
ORD
-
CWL
1 stop18h 25m
KLM
Deal found 24/3£666
Mon 20/409:45
CWL
-
ORD
1 stop10h 45m
KLM
Mon 27/416:50
ORD
-
CWL
1 stop17h 55m
KLM
Deal found 23/3£669
Tue 21/409:45
CWL
-
MDW
2 stops18h 43m
KLM
Tue 28/419:16
MDW
-
CWL
2 stops15h 29m
KLM
Deal found 24/3£679
Tue 5/509:45
CWL
-
MDW
2 stops18h 43m
KLM
Tue 12/519:13
MDW
-
CWL
2 stops15h 32m
KLM
Deal found 21/3£682
Mon 4/517:15
CWL
-
ORD
1 stop27h 00m
KLM
Mon 11/516:50
ORD
-
CWL
1 stop10h 25m
KLM
Deal found 20/3£688
Mon 4/509:45
CWL
-
ORD
2 stops16h 55m
Delta
Mon 11/519:00
ORD
-
CWL
2 stops15h 45m
Delta
Deal found 20/3£692
Wed 6/509:45
CWL
-
MDW
2 stops18h 43m
Delta
Wed 13/509:23
MDW
-
CWL
2 stops17h 52m
Delta
Deal found 22/3£696
Sun 19/417:15
CWL
-
ORD
1 stop27h 15m
KLM
Sun 26/416:20
ORD
-
CWL
1 stop10h 55m
KLM
Deal found 22/3£697
Sat 18/407:30
CWL
-
ORD
1 stop12h 30m
Multiple Airlines
Sat 25/421:00
ORD
-
CWL
1 stop18h 20m
Multiple Airlines
Deal found 21/3£700
Tue 2/611:35
CWL
-
MDW
1 stop28h 05m
Multiple Airlines
Tue 16/619:16
MDW
-
CWL
2 stops32h 59m
Multiple Airlines
Deal found 24/3£713
Mon 20/409:45
CWL
-
ORD
2 stops32h 41m
Virgin Atlantic
Mon 27/416:50
ORD
-
CWL
1 stop10h 25m
Virgin Atlantic
Deal found 23/3£718

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 25 March 2026.

Round-trip from

£644

One-way from

£349
WestJet
  • WestJet
  • 2/6-16/6
  • 5 total stops
  • 59h 45m total
  • Cardiff to Illinois
Search Deals
29/4
  • 29/4
  • 3 total stops
  • 54h 04m 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 25 March 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 - MDW

CWLMDW

Cardiff Wales

Tue 21/4

09:45-22:28

2 stops18h 43m

Chicago Midway

Tue 28/4

19:16-16:45

2 stops15h 29m

£679
Fastest return journey

CardiffChicago

CWL - ORD

CWLORD

Cardiff Wales

Mon 4/5

09:45-14:30

1 stop10h 45m

Chicago O'Hare Intl

Mon 11/5

10:30-09:15

2 stops16h 45m

£688

CardiffChicago

CWL - ORD

CWLORD

Cardiff Wales

Mon 4/5

17:15-14:15

1 stop27h 00m

Chicago O'Hare Intl

Mon 11/5

16:50-09:15

1 stop10h 25m

£688

CardiffChicago

CWL - ORD

CWLORD

Cardiff Wales

Mon 4/5

09:45-20:40

2 stops16h 55m

Chicago O'Hare Intl

Mon 11/5

19:00-16:45

2 stops15h 45m

£692

CardiffChicago

CWL - MDW

CWLMDW

Cardiff Wales

Wed 6/5

09:45-22:28

2 stops18h 43m

Chicago Midway

Wed 13/5

09:23-09:15

2 stops17h 52m

£696

CardiffChicago

CWL - MDW

CWLMDW

Cardiff Wales

Tue 2/6

11:35-09:40

1 stop28h 05m

Chicago Midway

Tue 16/6

19:16-10:15

2 stops32h 59m

£713

CardiffChicago

CWL - ORD

CWLORD

Cardiff Wales

Mon 20/4

09:45-12:26

2 stops32h 41m

Chicago O'Hare Intl

Mon 27/4

16:50-09:15

1 stop10h 25m

£718

CardiffChicago

CWL - MDW

CWLMDW

Cardiff Wales

Mon 20/4

17:15-17:58

2 stops30h 43m

Chicago Midway

Mon 27/4

09:29-09:15

2 stops17h 46m

£723

CardiffChicago

CWL - ORD

CWLORD

Cardiff Wales

Sat 18/4

17:35-14:15

1 stop26h 40m

Chicago O'Hare Intl

Sat 25/4

13:11-09:15

2 stops14h 04m

£733

CardiffChicago

CWL - MDW

CWLMDW

Cardiff Wales

Mon 4/5

09:45-22:28

2 stops18h 43m

Chicago Midway

Mon 11/5

09:22-09:15

2 stops17h 53m

£736

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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 25 March 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
1,478 reviews
Check prices

Entertainment

7.1

Comfort

7.6

Crew

8.4

Boarding

7.8

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.8
Good
1,478 reviews
KLM
7.8
Good
1,478 reviews
Check prices

Entertainment

7.1

Comfort

7.6

Crew

8.4

Boarding

7.8

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 43m. 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 25 March 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£549Average£702FlexibilityNo 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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