£636 Find Cheap Flights from Cardiff to Illinois

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Cardiff to Illinois departing on 15/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Cardiff to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Cardiff to Illinois, as well as popular online travel agencies
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Flight Deals

Book Cheap Cardiff to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Cardiff to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Cardiff to Illinois

Sat, 15 Aug - Sun, 23 Aug
Multiple Airlines Logo
07:30 - 20:05
CWL
-
ORD
18h 35m
3 stops
Multiple Airlines Logo
15:45 - 21:45
ORD
-
CWL
24h 00m
2 stops
£636Multiple Airlines
Sat, 15 Aug - Sun, 23 Aug
Multiple Airlines Logo
07:30 - 20:05
CWL
-
ORD
18h 35m
3 stops
Multiple Airlines Logo
08:45 - 21:45
ORD
-
CWL
31h 00m
3 stops
£671Multiple Airlines
Sat, 15 Aug - Sun, 23 Aug
Multiple Airlines Logo
07:30 - 20:05
CWL
-
ORD
18h 35m
3 stops
Multiple Airlines Logo
15:45 - 10:15
ORD
-
CWL
12h 30m
1 stop
£680Multiple Airlines
Sat, 15 Aug - Sun, 23 Aug
Multiple Airlines Logo
07:30 - 19:29
CWL
-
ORD
17h 59m
2 stops
Multiple Airlines Logo
14:15 - 10:15
ORD
-
CWL
14h 00m
1 stop
£753Multiple Airlines
Sun, 25 Oct - Sun, 1 Nov
Multiple Airlines Logo
23:50 - 19:25
CWL
-
ORD
24h 35m
1 stop
Multiple Airlines Logo
15:55 - 08:00
ORD
-
CWL
10h 05m
1 stop
£780Multiple Airlines
Sun, 25 Oct - Sat, 31 Oct
Multiple Airlines Logo
23:50 - 15:00
CWL
-
ORD
20h 10m
1 stop
Multiple Airlines Logo
21:10 - 08:00
ORD
-
CWL
29h 50m
1 stop
£818Multiple Airlines
Mon, 22 Jun - Mon, 6 Jul
WestJet Logo
11:35 - 16:40
CWL
-
ORD
35h 05m
2 stops
WestJet Logo
17:30 - 10:15
ORD
-
CWL
58h 45m
2 stops
£847WestJet
Thu, 9 Jul - Tue, 14 Jul
Delta Logo
09:45 - 22:39
CWL
-
ORD
18h 54m
2 stops
Delta Logo
16:20 - 16:45
ORD
-
CWL
18h 25m
1 stop
£867Delta
Thu, 9 Jul - Tue, 14 Jul
Delta Logo
09:45 - 20:31
CWL
-
ORD
16h 46m
2 stops
Delta Logo
16:20 - 09:15
ORD
-
CWL
10h 55m
1 stop
£867Delta
Sat, 15 Aug - Sun, 23 Aug
KLM Logo
17:35 - 18:01
CWL
-
MDW
30h 26m
2 stops
KLM Logo
19:25 - 09:15
MDW
-
CWL
31h 50m
2 stops
£1,248KLM
Booking Insights

KAYAK's insights & trends for Cardiff to Illinois flights

Get data-powered insights and trends into flights from Cardiff to Illinois to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Cardiff to Illinois?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 3 days.

In the past 3 days, the cheapest return tickets from Cardiff to Illinois were found on Delta (£938) and KLM (£1,248).

Find deals

Good to know - Cheap tickets from Cardiff to Illinois

Cheapest flight£636
Flight from Cardiff to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Cardiff to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Cardiff to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Cardiff to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Cardiff to Illinois is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Cardiff to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Cardiff to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Cardiff to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Cardiff to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Cardiff to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Cardiff to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Cardiff to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1526 reviews
7.3Food
7.8Boarding
8.4Crew
7.7Comfort
7.2Entertainment
Airline reviews

Outstanding even though the 330 was one of the oldest in the fleet. The difference was the attentiveness and responsiveness of a really experienced flight attendant. For airline food great variety of interesting choices and good tastes supported by a good wine selection.

10.0 ExcellentBob, May 2026
AMS - YYZ
Read more KLM reviews

Outstanding even though the 330 was one of the oldest in the fleet. The difference was the attentiveness and responsiveness of a really experienced flight attendant. For airline food great variety of interesting choices and good tastes supported by a good wine selection.

As per usual when you Hit the UK it's a slow process through customs Not as efficient at Thailand for sure

It was really nice experience by flying this klm flight.I personally recommend everyone to please try this klm flight

It was really nice journey i personally recommend klm flight

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

Flight was on time, staff are friendly and helpful onboard.

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

Everything you need to know for your flight from Cardiff to Illinois

Information on your arrival and departure airports

Cardiff (CWL)