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Cheap flights from Cardiff to Illinois from £619

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Cardiff to Illinois departing on 10/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Cardiff to Illinois

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:35 - 19:48CWL  Cardiff Wales-ORD Chicago O'Hare Intl
14h 13m1 stop Toronto Pearson Intl
Multiple Airlines Logo
19:25 - 22:25ORD  Chicago O'Hare Intl-CWL Cardiff Wales
21h 00m2 stops Reykjavik Keflavik Intl Dublin
£619Multiple Airlines
Thu, 10 Sep - Wed, 16 Sep
Multiple Airlines Logo
11:35 - 19:48CWL  Cardiff Wales-ORD Chicago O'Hare Intl
14h 13m1 stop Toronto Pearson Intl
Multiple Airlines Logo
19:25 - 22:25ORD  Chicago O'Hare Intl-CWL Cardiff Wales
21h 00m2 stops Reykjavik Keflavik Intl Dublin
£621Multiple Airlines
Thu, 10 Sep - Wed, 16 Sep
Multiple Airlines Logo
11:35 - 19:48CWL  Cardiff Wales-ORD Chicago O'Hare Intl
14h 13m1 stop Toronto Pearson Intl
Multiple Airlines Logo
19:25 - 22:25ORD  Chicago O'Hare Intl-CWL Cardiff Wales
21h 00m2 stops Reykjavik Keflavik Intl Dublin
£621Multiple Airlines
Thu, 10 Sep - Wed, 16 Sep
Multiple Airlines Logo
11:35 - 19:48CWL  Cardiff Wales-ORD Chicago O'Hare Intl
14h 13m1 stop Toronto Pearson Intl
Multiple Airlines Logo
19:25 - 22:25ORD  Chicago O'Hare Intl-CWL Cardiff Wales
21h 00m2 stops Reykjavik Keflavik Intl Dublin
£625Multiple Airlines
Thu, 10 Sep - Wed, 16 Sep
Multiple Airlines Logo
11:35 - 19:48CWL  Cardiff Wales-ORD Chicago O'Hare Intl
14h 13m1 stop Toronto Pearson Intl
Multiple Airlines Logo
19:25 - 22:25ORD  Chicago O'Hare Intl-CWL Cardiff Wales
21h 00m3 stops Reykjavik Keflavik Intl Glasgow Intl Dublin
£632Multiple Airlines
Thu, 10 Sep - Wed, 16 Sep
Multiple Airlines Logo
11:35 - 19:48CWL  Cardiff Wales-ORD Chicago O'Hare Intl
14h 13m1 stop Toronto Pearson Intl
Multiple Airlines Logo
22:25 - 22:25ORD  Chicago O'Hare Intl-CWL Cardiff Wales
18h 00m3 stops Reykjavik Keflavik Intl Glasgow Intl Dublin
£635Multiple Airlines
Thu, 10 Sep - Wed, 16 Sep
Multiple Airlines Logo
11:35 - 19:48CWL  Cardiff Wales-ORD Chicago O'Hare Intl
14h 13m1 stop Toronto Pearson Intl
Multiple Airlines Logo
22:25 - 22:25ORD  Chicago O'Hare Intl-CWL Cardiff Wales
18h 00m3 stops Reykjavik Keflavik Intl Glasgow Intl Dublin
£639Multiple Airlines
Thu, 10 Sep - Wed, 16 Sep
Multiple Airlines Logo
11:35 - 19:48CWL  Cardiff Wales-ORD Chicago O'Hare Intl
14h 13m1 stop Toronto Pearson Intl
Multiple Airlines Logo
22:25 - 22:25ORD  Chicago O'Hare Intl-CWL Cardiff Wales
18h 00m3 stops Reykjavik Keflavik Intl Glasgow Intl Dublin
£640Multiple Airlines
Thu, 10 Sep - Wed, 16 Sep
KLM Logo
17:15 - 16:32CWL  Cardiff Wales-ORD Chicago O'Hare Intl
29h 17m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
KLM Logo
17:29 - 09:15ORD  Chicago O'Hare Intl-CWL Cardiff Wales
33h 46m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol
£694KLM
Mon, 12 Oct - Sun, 18 Oct
KLM Logo
17:15 - 18:00CWL  Cardiff Wales-MDW Chicago Midway
30h 45m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
KLM Logo
18:44 - 09:15MDW  Chicago Midway-CWL Cardiff Wales
32h 31m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol
£694KLM
Mon, 12 Oct - Sun, 18 Oct

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KLM flights from Cardiff to Illinois

Our best KLM deals on Cardiff to Illinois flight tickets
KLM
10 Sept
CWL17:15Cardiff Wales
27h 00m
1 stop
ORD14:15Chicago O'Hare Intl
16 Sept
ORD16:50Chicago O'Hare Intl
10h 25m
1 stop
CWL09:15Cardiff Wales
£667
KLM
12 Oct
CWL17:15Cardiff Wales
29h 17m
2 stops
ORD16:32Chicago O'Hare Intl
18 Oct
ORD17:29Chicago O'Hare Intl
33h 46m
2 stops
CWL09:15Cardiff Wales
£694
KLM
15 Aug
CWL09:50Cardiff Wales
18h 46m
2 stops
MDW22:36Chicago Midway
23 Aug
MDW19:25Chicago Midway
15h 20m
2 stops
CWL16:45Cardiff Wales
£1,610

Air France flights from Cardiff to Illinois

Our best Air France deals on Cardiff to Illinois flight tickets
Air France
10 Sept
CWL17:15Cardiff Wales
27h 00m
1 stop
ORD14:15Chicago O'Hare Intl
16 Sept
ORD16:50Chicago O'Hare Intl
17h 55m
1 stop
CWL16:45Cardiff Wales
£671
Air France
12 Oct
CWL17:15Cardiff Wales
27h 00m
1 stop
ORD14:15Chicago O'Hare Intl
18 Oct
ORD16:15Chicago O'Hare Intl
18h 30m
1 stop
CWL16:45Cardiff Wales
£690
Air France
15 Aug
CWL17:35Cardiff Wales
29h 39m
2 stops
ORD17:14Chicago O'Hare Intl
23 Aug
ORD16:20Chicago O'Hare Intl
18h 25m
1 stop
CWL16:45Cardiff Wales
£1,301

momondo 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, momondo users made 279,928 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

£619

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

£621

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

£621

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

£625

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

3 stops21h 00m

£632
Fastest return journey

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

22:25-22:25

3 stops18h 00m

£635

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

22:25-22:25

3 stops18h 00m

£639

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

22:25-22:25

3 stops18h 00m

£640

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Mon 12/10

17:15-16:32

2 stops29h 17m

Chicago O'Hare Intl

Sun 18/10

17:29-09:15

2 stops33h 46m

£694

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

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

Cheap Cardiff to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Cardiff to Illinois

Fastest flight time

14h 13m

Direct flights

None
The fastest flight from Cardiff to Illinois takes 14h 13m
There are no direct flights from Cardiff to Illinois. There are no popular flight routes from Cardiff to Illinois.
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Frequently asked questions about flying from Cardiff to Illinois

  • When did momondo last update prices for flights from Cardiff Wales Airport to Illinois?

    Prices for flights from Cardiff Wales Airport to Illinois are refreshed on a daily basis.

  • How many operators does momondo search for flights from Cardiff Wales Airport to Illinois?

  • How old do you have to be to fly from Cardiff Wales Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Cardiff Wales Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Cardiff to Illinois

Compare and see reviews for airlines that fly from Cardiff to Illinois with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom £694Free CancellationRating
7.8
1,556 reviews
Search KLM flights

Frequently asked questions about flying from Cardiff to Illinois

  • How do I get Price Alerts for flights from Cardiff to Illinois?

    Search flight deals from Cardiff to Illinois. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from Cardiff to Illinois with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Why use momondo?

Why should I use momondo to find a flight deal from Cardiff to Illinois?

It is quick and easy to find Cardiff to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

Can I find flights from Cardiff to Illinois with flexible booking policies on momondo?

momondo does allow users to show only those flights to Illinois from Cardiff which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Cardiff to Illinois?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Cardiff to Illinois.

I’m not ready to book a flight from Cardiff to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Cardiff to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Thu 10/9
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