Cheap flights from the United Kingdom to Illinois from £198
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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from United Kingdom to Illinois
Keep the following information in mind while searching for United Kingdom to Illinois flight deals. Data was last updated 15 July 2025.
Round-trip from | £412 |
---|---|
One-way from | £232 |
Popular in | July |
Cheapest in | February |
Average price | £654 |
Good round-trip deal | £545 or less |
Good one-way deal | £605 or less |
Find flight deals from United Kingdom to Illinois
Cheapest flights from United Kingdom to IllinoisExplore the most affordable flight options available from United Kingdom to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2025.
Explore the most affordable flight options available from United Kingdom to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from United Kingdom 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 15 July 2025.
Use the filters below to find and compare flights from the United Kingdom to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 10/9
08:30-14:55
1 stop12h 25m
Chicago O'Hare Intl
Thu 18/9
18:00-08:20
Nonstop8h 20m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 28/8
19:50-16:10
1 stop26h 20m
Chicago O'Hare Intl
Thu 4/9
18:00-22:05
1 stop22h 05m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
Tue 2/9
15:40-21:15
1 stop11h 35m
Chicago O'Hare Intl
Thu 9/10
19:25-14:40
1 stop13h 15m
LondonChicago
LTN - ORD
LTNORD
London Luton
Thu 28/8
12:35-16:10
2 stops33h 35m
Chicago O'Hare Intl
Thu 4/9
19:15-20:40
2 stops19h 25m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 16/10
11:55-20:50
1 stop14h 55m
Chicago O'Hare Intl
Mon 20/10
13:36-09:30
1 stop13h 54m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
Sat 30/8
14:00-22:22
1 stop14h 22m
Chicago O'Hare Intl
Thu 11/9
12:05-10:00
1 stop15h 55m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Mon 25/8
21:25-18:15
1 stop26h 50m
Chicago O'Hare Intl
Sat 13/12
18:30-10:50
1 stop10h 20m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
Tue 16/9
18:35-15:55
1 stop27h 20m
Chicago O'Hare Intl
Mon 13/10
15:45-17:50
1 stop20h 05m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
Fri 12/9
15:05-12:41
1 stop27h 36m
Chicago O'Hare Intl
Fri 10/10
13:43-08:10
1 stop12h 27m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sun 24/8
07:30-19:55
1 stop18h 25m
Chicago O'Hare Intl
Tue 9/9
16:00-06:20
Nonstop8h 20m
Best time to book a flight from United Kingdom to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from United Kingdom with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from the United Kingdom to Illinois
What is the cheapest month to book a flight from United Kingdom to Illinois?
Currently, January is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of £595). Flying from United Kingdom to Illinois in July is currently the most expensive (average of £843). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from GB to IL?
Find hourly flight availability from United Kingdom to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 July 2025.
When flying from United Kingdom 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.
Weekly flight availability from United Kingdom to Illinois
Explore weekly flight availability from United Kingdom to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 15 July 2025.
The most flights from GB0 to USIL are scheduled on a Saturday (54 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (47 on average).
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 15 July 2025.
Read through reviews of airlines operating flights from the United Kingdom to Illinois, such as Delta, KLM, andAir Transat. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
Boarding
Entertainment
Comfort
Food
Overall
Reviews
Michael,Jul 2025
AMS - ATL
Crew
Boarding
Entertainment
Comfort
Food
Overall
Reviews
Michael,Jul 2025
AMS - ATL
Crew
Boarding
Entertainment
Comfort
Food
Overall
Reviews
Michael,Jul 2025
AMS - ATL
Crew
Boarding
Entertainment
Comfort
Food
Overall
Reviews
Michael,Jul 2025
AMS - ATL
Crew
Boarding
Entertainment
Comfort
Food
Overall
Reviews
Michael,Jul 2025
AMS - ATL
Crew
Boarding
Entertainment
Comfort
Food
Overall
Reviews
Michael,Jul 2025
AMS - ATL
Related info for your journey
Find useful and relevant information for your journey from United Kingdom to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for United Kingdom to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 10 airlines flying from United Kingdom to Illinois
Discover the top 10 airlines that operate flights from United Kingdom 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 15 July 2025.
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 United Kingdom to Illinois?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Illinois from United Kingdom today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from United Kingdom 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 United Kingdom.
Can Cheapflights find flights from United Kingdom to Illinois with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from United Kingdom to Illinois, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from United Kingdom to Illinois become cheaper?
Yes, Cheapflights offers price alerts on United Kingdom to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.