How long is the flight from Wales to Illinois?

Departing from Wales to Illinois will take you 10h 45m. The distance from Wales to Illinois is about 3831 mi. This flight may include one or multiple stops.

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).

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

When flying from Wales 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.

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

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

How can I find direct flights from Wales to Illinois?

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

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

Yes. Cheapflights offers flight deals from Wales 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.

£573+ Cheap Flights from Wales to Illinois

Cheap flight deals from Wales to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

Cheapest flights from Wales to Illinois
Explore the most affordable flight options available from Wales to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 September 2026.

Mon 16/1108:35 -

1 stop15h 45m

Wed 18/1115:55 -

1 stop15h 05m

Deal found 26/9£573

Wed 11/1110:20 -

1 stop34h 05m

Wed 18/1116:25 -

1 stop11h 20m

Deal found 27/9£618

Tue 10/1110:20 -

1 stop34h 05m

Tue 17/1112:38 -

2 stops15h 12m

Deal found 26/9£620

Mon 19/1017:15 -

1 stop27h 00m

Sun 25/1017:25 -

1 stop18h 35m

Deal found 26/9£635

Tue 20/1009:45 -

2 stops17h 46m

Sun 25/1017:25 -

1 stop11h 25m

Deal found 26/9£640

Wed 21/1009:45 -

2 stops17h 46m

Sun 25/1017:25 -

1 stop18h 35m

Deal found 26/9£642

Fri 13/1116:05 -

2 stops32h 40m

Fri 20/1115:55 -

1 stop9h 55m

Deal found 29/9£832

Find flight deals from Wales to Illinois

Round-trip from	£573

16/11-18/11
2 total stops
30h 50m total
Wales to Illinois

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Wed 11/11

10:20-23:54

2 stops19h 34m

Chicago O'Hare Intl

Wed 18/11

16:25-17:00

1 stop18h 35m

£626

Fastest return journey

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Wed 21/10

09:45-14:30

1 stop10h 45m

Chicago O'Hare Intl

Sun 25/10

17:25-09:50

1 stop11h 25m

£635

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Tue 20/10

09:45-21:31

2 stops17h 46m

Chicago O'Hare Intl

Sun 25/10

17:25-09:50

1 stop11h 25m

£640

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Wed 11/11

10:20-07:49

2 stops27h 29m

Chicago O'Hare Intl

Wed 18/11

10:30-09:45

2 stops17h 15m

£640

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Tue 2/2

10:20-20:37

2 stops16h 17m

Chicago O'Hare Intl

Tue 9/2

06:00-09:50

2 stops21h 50m

£647

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Wed 6/1

17:30-17:34

2 stops30h 04m

Chicago O'Hare Intl

Wed 13/1

16:25-09:50

1 stop11h 25m

£647

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Wed 6/1

17:30-20:37

2 stops33h 07m

Chicago O'Hare Intl

Wed 13/1

10:30-09:50

2 stops17h 20m

£738

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Wed 6/1

10:20-14:25

1 stop34h 05m

Chicago O'Hare Intl

Wed 13/1

16:25-09:50

1 stop11h 25m

£772

CardiffChicago

CWL Cardiff Wales - ORD Chicago O'Hare Intl

CWLORD

Cardiff Wales

Fri 13/11

10:20-19:52

3 stops39h 32m

Chicago O'Hare Intl

Fri 20/11

15:50-17:00

3 stops19h 10m

£884

Flights are sorted by cheapest return flights first.

Deals found on 27/9

Sorted by cheapest first

Best time to book a flight from Wales to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Wales with our price prediction graph.

CWL-ORD

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 Wales to Illinois

GBWLS-USIL

CWL-ORD

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

Reviews of airlines servicing Illinois

Get a feel of what it's like to fly with KLM from Wales 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

1,578 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Kushal,Sept 2026

QRO - ATL

It was a nice one. Crew were friendly and helpful.

KLM

7.8

Good

1,578 reviews

KLM

7.8

Good

1,578 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Kushal,Sept 2026

QRO - ATL

It was a nice one. Crew were friendly and helpful.

Related info for your journey

How long is the flight from Wales to Illinois?
Departing from Wales to Illinois will take you 10h 45m. The distance from Wales to Illinois is about 3831 mi. This flight may include one or multiple stops.
Can I find deals for flights from Wales to Illinois that include hotel bookings?
Yes. In addition to deals on Wales to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Wales to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Wales to Illinois.
Can I find deals for business class flights from Wales to Illinois?
Yes. Cheapflights offers flight deals from Wales 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to United States

Flights by cabin class

Other flight options

Popular flights

Return Flight Options

Top destinations

Alternative routes for Wales to Illinois

Heathrow to Newark flights

Heathrow to John F Kennedy Intl flights

Gatwick to John F Kennedy Intl flights

Heathrow to LaGuardia flights

Stansted to John F Kennedy Intl flights

London City to John F Kennedy Intl flights

Gatwick to Newark flights

Heathrow to Orlando flights

Heathrow to Miami flights

Gatwick to LaGuardia flights

Heathrow to Los Angeles flights

Luton to John F Kennedy Intl flights

Manchester to John F Kennedy Intl flights

London City to Newark flights

Heathrow to Dallas/Fort Worth flights

Heathrow to Boston flights

Gatwick to Orlando flights

Heathrow to San Francisco flights

Heathrow to O'Hare Intl flights

Stansted to Newark flights

Heathrow to Las Vegas flights

Manchester to Orlando flights

Luton to Newark flights

Heathrow to Dulles Intl flights

Gatwick to Miami flights

Heathrow to Hobby flights

Manchester to Newark flights

Heathrow to Baltimore flights

Heathrow to Atlanta flights

London City to Orlando flights

Stansted to Orlando flights

Stansted to Miami flights

London City to Miami flights

Manchester to LaGuardia flights

Gatwick to Los Angeles flights

Stansted to Los Angeles flights

London City to Los Angeles flights

Heathrow to George Bush Intcntl flights

Gatwick to Boston flights

Gatwick to Dallas/Fort Worth flights

Luton to Miami flights

London City to Boston flights

Edinburgh to Newark flights

Heathrow to Seattle flights

Heathrow to Tampa flights

Heathrow to Ontario flights

Stansted to Dallas/Fort Worth flights

Stansted to Boston flights

Gatwick to San Francisco flights

Luton to Orlando flights

Top airline flying from Wales to Illinois

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest£707	Average£710	FlexibilityNo cancel fee	On-time75%	Search KLM flights

Fly with Cheapflights

How does Cheapflights help users find flights from Wales to Illinois?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Wales to Illinois. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Illinois from Wales.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Wales to Illinois flexibly with Cheapflights today.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Illinois from Wales today and book when prices fit your budget.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Wales to Illinois from £573

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Wales to Illinois

Cheapest flights from Wales to IllinoisExplore the most affordable flight options available from Wales to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 September 2026.

Explore the most affordable flight options available from Wales to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 September 2026.

Best flights from Wales to IllinoisDiscover carefully curated flight deals from Wales to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 September 2026.

Discover carefully curated flight deals from Wales to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 September 2026.

Last-minute flights from Wales to IllinoisDiscover last-minute flight deals from Wales to Illinois. Data last updated 29 September 2026 and is based on user searches.

Discover last-minute flight deals from Wales to Illinois. Data last updated 29 September 2026 and is based on user searches.

Find flight deals from Wales to Illinois

Round-trip from

Cheapflights Fare Finder

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

Best time to book a flight from Wales to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Wales with our price prediction graph.

Cheapflights Insights

Reviews of airlines servicing Illinois

Get a feel of what it's like to fly with KLM from Wales 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.

Related info for your journey

How long is the flight from Wales to Illinois?

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

How can I find direct flights from Wales to Illinois?

Can I find deals for business class flights from Wales 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 Wales to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Illinois by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Wales to Illinois by cabin class

Find flights from Wales to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Wales and Illinois flights

Browse other Wales and Illinois flight options. Last updated on 29 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Find a return flight route from Illinois

Find the right flight back to Wales after your stay in Illinois

Wales to Illinois flights

Consider these flights travelling from Wales to Illinois.

Top airline flying from Wales to Illinois

Fly with Cheapflights

How does Cheapflights help users find flights from Wales to Illinois?

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

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Wales to Illinois
Explore the most affordable flight options available from Wales to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 September 2026.

Best flights from Wales to Illinois
Discover carefully curated flight deals from Wales to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 September 2026.

Last-minute flights from Wales to Illinois
Discover last-minute flight deals from Wales to Illinois. Data last updated 29 September 2026 and is based on user searches.