£284+ Cheap flights to Illinois
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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
Flights to Illinois in 2025
Find the latest flights to Illinois in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 20 March 2025.
Return from | £414 |
---|---|
One-way from | £284 |
Popular in | August |
Cheapest in | February |
Average price | £493 |
Good round-trip deal | £561 or less |
Good one-way deal | £583 or less |
Find flights to Illinois
Browse one-way and return flights deals to Illinois on Cheapflights. Flight deals are based on user searches and were last updated on 20 March 2025
Explore Illinois
Find flight deals to Illinois
Cheapest flights to IllinoisExplore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 20 March 2025.
Explore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 20 March 2025.
Cheapflights Fare Finder
Locate flights to Illinois that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 20 March 2025.
Use the filters below to find and compare flights to Illinois that are best for you.
Fly from
Route
Depart
Return
Price
LondonChicago
LGW - ORD
LGWORD
London Gatwick
Tue 29/4
10:00-14:26
1 stop34h 26m
Chicago O'Hare Intl
Wed 16/7
05:05-10:00
2 stops22h 55m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Mon 21/4
21:25-18:15
1 stop26h 50m
Chicago O'Hare Intl
Fri 25/4
22:15-20:20
1 stop16h 05m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 23/4
08:40-15:55
1 stop13h 15m
Chicago O'Hare Intl
Tue 13/5
08:50-06:55
1 stop16h 05m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sun 20/4
06:30-14:45
1 stop14h 15m
Chicago O'Hare Intl
Fri 9/5
21:20-11:45
Nonstop8h 25m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
Thu 22/5
15:40-21:15
1 stop11h 35m
Chicago O'Hare Intl
Mon 26/5
19:25-14:35
1 stop13h 10m
LondonChicago
STN - ORD
STNORD
London Stansted
Tue 22/4
22:35-18:15
2 stops25h 40m
Chicago O'Hare Intl
Mon 28/4
19:25-21:00
2 stops19h 35m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sat 19/4
12:15-14:45
Nonstop8h 30m
Chicago O'Hare Intl
Fri 2/5
22:20-12:15
Nonstop7h 55m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sat 26/4
12:15-14:45
Nonstop8h 30m
Chicago O'Hare Intl
Thu 1/5
22:20-12:15
Nonstop7h 55m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 23/4
06:50-14:55
2 stops14h 05m
Chicago O'Hare Intl
Sat 3/5
15:35-10:00
1 stop12h 25m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sat 3/5
06:30-12:55
1 stop12h 25m
Chicago O'Hare Intl
Tue 13/5
17:50-10:15
1 stop10h 25m
Best time to book a flight to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight to Illinois
How long is the flight to Illinois?
On average, a flight from London to Illinois takes 16 hours 39 minutes. Flights to Illinois from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.
When is the cheapest time to fly to Illinois?
Use this chart to determine the cheapest time to fly return from London to Illinois. Price data was last updated on 28 April 2024.
Users looking for the lowest fares to Illinois should consider flying on Thursday afternoons, when prices are typically cheapest. Budget-minded travellers will want to avoid Saturday evenings, when prices are usually at their highest.
Weekly flight availability to Illinois
The most flights from London to Illinois are scheduled on a Monday (37 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (36 on average).
What are the most popular airlines that fly to Illinois?
The most popular airlines flying from London to Illinois are British Airways, Finnair and Lufthansa.
What are the cheapest airlines that fly to Illinois?
The cheapest airlines flying from London to Illinois are Icelandair, Scandinavian Airlines and TAP AIR PORTUGAL.
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
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.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
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).
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 20 March 2025.
To help decide which airline to fly to Illinois, see what other customers have to say about Delta, KLM and LOT. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
Entertainment
Boarding
Comfort
Overall
Food
Reviews
Aaron,Oct 2024
TUS - LAX
Crew
Entertainment
Boarding
Comfort
Overall
Food
Reviews
Aaron,Oct 2024
TUS - LAX
Crew
Entertainment
Boarding
Comfort
Overall
Food
Reviews
Aaron,Oct 2024
TUS - LAX
Crew
Entertainment
Boarding
Comfort
Overall
Food
Reviews
Aaron,Oct 2024
TUS - LAX
Crew
Entertainment
Boarding
Comfort
Overall
Food
Reviews
Aaron,Oct 2024
TUS - LAX
Crew
Entertainment
Boarding
Comfort
Overall
Food
Reviews
Aaron,Oct 2024
TUS - LAX
FAQs about flying to Illinois
Illinois climate
Illinois’s winters are very cold and long with snow and icy winds from late November through to April. Summers, especially July and August, the weather tends to be hot and humid. The best times to visit is when the weather is perfect, in spring and autumn; tornado season can occur anytime between the months of March and May. Chicago’s summers are humid with highs of 30 degrees (Celsius) or more and its winters are bitterly cold.
Getting around Illinois
Public transportation is reliable and taxis are easy to find. Driving is not recommended because of heavy traffic and parking is almost impossible to find. The El, a system operated by The Chicago Transit Authority consists of elevated trains running 24 hours a day. During the summer rush hour a River Bus is available.
What is good to know if travelling to Illinois?- Chicago has a wealth of things to see and do. The best view of the city can be found at 1,450 feet from the top of North America’s tallest building – the Sears Tower. Head to the 103rd floor to the Skydeck where you can see the entire city laid out. The Hancock Building is also well worth a visit and offers stunning city views from its observation deck or cocktail bar.
- Don’t miss a trip to the Anderson Japanese Gardens in Rockford. Set on twelve acres the gardens are adorned with Japanese maples, magnolias, and rhododendrons and have several ponds and waterfalls with Japanese bronze structures surrounding them. There’s also an authentic tea house and contemporary “Garden of Reflection”.
- Visit the preserved Frank Lloyd Wright Museum on Chicago Avenue in Oak Park where the famed architect spent 20 years of his career and designed 130 of his masterpieces. Wright lived here until 1909.
- One of the most visited attractions in Chicago is the Art Institute of Chicago. Art lovers – well any visitor – shouldn’t miss a trip to the museum, it’s remarkable. The gargantuan building houses more than 250,000 works of art from all over the world including ancient Egyptian, Japanese, Korean, Greek and Roman relics. One of its highlights is the anthology of Impressionist art which has an impressive collection by Monet, Pablo Picasso and Henri Matisse to name a few.
- Anyone interested in the lives of the Amish people should head to central Illinois where a welcoming group of Amish villages are set up. Take a tour of the community in the Illinois Amish Interpretative Centre in Arcola, visit a working farm and watch how supper is prepared and enjoyed in a family home.
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How does Cheapflights help users find flights to Illinois?
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Why should you use Cheapflights to find cheap flight tickets to Illinois?
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Can Cheapflights find flights to Illinois with no change fees?
Certainly. Search results for flights to Illinois 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 to Illinois become cheaper?
Not ready to book yet? You can track prices for flights to Illinois on Cheapflights with our Price Alerts feature and get notified when better prices are available.