This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/2. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
5 Dec — 12 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Flights to Illinois in 2026
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Cheapest flights to Illinois
Explore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 5 November 2026.
Fri 20/1121:35 -
2 stops47h 55m
Sun 6/1220:10 -
1 stop13h 35m
Deal found 2/11£516
Thu 3/1207:05 -
2 stops15h 40m
Mon 15/219:10 -
2 stops20h 25m
Deal found 3/11£516
Sun 22/1107:45 -
2 stops15h 35m
Thu 3/1218:30 -
2 stops20h 45m
Deal found 31/10£517
Wed 2/1206:20 -
2 stops17h 00m
Sat 5/1218:30 -
2 stops16h 05m
Deal found 2/11£517
Sun 8/1106:00 -
1 stop15h 30m
Sun 15/1120:10 -
1 stop19h 25m
Deal found 31/10£517
Sun 22/1107:00 -
2 stops16h 20m
Thu 3/1218:30 -
2 stops21h 30m
Deal found 31/10£517
Wed 18/1108:00 -
2 stops15h 20m
Sun 22/1118:30 -
2 stops19h 10m
Deal found 31/10£518
Wed 25/1107:00 -
2 stops16h 20m
Wed 2/1218:30 -
2 stops21h 05m
Deal found 31/10£519
Wed 9/1206:40 -
1 stop16h 15m
Sat 25/919:15 -
2 stops20h 20m
Deal found 2/11£520
Mon 23/1107:00 -
2 stops16h 20m
Sun 29/1118:30 -
2 stops19h 10m
Deal found 31/10£521
Tue 24/1107:05 -
2 stops15h 40m
Mon 30/1119:10 -
2 stops15h 15m
Deal found 1/11£521
Tue 17/1107:45 -
2 stops15h 35m
Mon 23/1118:30 -
2 stops17h 30m
Deal found 2/11£521
Best flights to Illinois
Discover carefully curated flight deals to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 November 2026.
Sun 7/320:35 -
1 stop26h 45m
Mon 22/319:30 -
1 stop10h 20m
Deal found 3/11£529
Fri 20/1107:00 -
2 stops16h 20m
Tue 24/1118:30 -
2 stops21h 30m
Deal found 1/11£538
Fri 8/107:05 -
2 stops15h 40m
Sun 31/119:10 -
1 stop17h 20m
Deal found 3/11£564
Wed 7/421:15 -
2 stops48h 45m
Fri 16/417:45 -
2 stops20h 40m
Deal found 5/11£604
Mon 7/1209:30 -
1 stop16h 35m
Wed 23/1215:45 -
Nonstop8h 10m
Deal found 1/11£641
Mon 30/1118:40 -
1 stop27h 35m
Mon 7/1216:10 -
2 stops15h 30m
Deal found 2/11£657
Thu 11/212:10 -
1 stop13h 05m
Wed 17/220:40 -
Nonstop7h 45m
Deal found 31/10£665
Mon 7/1206:30 -
2 stops16h 13m
Tue 22/1207:00 -
1 stop18h 05m
Deal found 3/11£672
Wed 13/110:00 -
2 stops17h 52m
Wed 20/113:25 -
2 stops20h 20m
Deal found 3/11£695
Thu 15/409:20 -
1 stop10h 40m
Tue 27/416:05 -
1 stop10h 45m
Deal found 4/11£734
Fri 12/210:00 -
2 stops42h 45m
Tue 16/217:49 -
2 stops39h 56m
Deal found 2/11£756
Wed 10/210:05 -
1 stop29h 55m
Wed 17/220:15 -
1 stop30h 55m
Deal found 31/10£797
Mon 7/1216:45 -
2 stops37h 37m
Mon 14/1206:00 -
2 stops19h 50m
Deal found 5/11£817
Mon 7/1213:10 -
2 stops17h 12m
Mon 14/1215:12 -
2 stops14h 48m
Deal found 5/11£880
Wed 2/1210:00 -
2 stops37h 23m
Wed 9/1213:35 -
2 stops20h 50m
Deal found 4/11£952
Thu 19/1110:20 -
1 stop12h 25m
Sun 29/1119:10 -
1 stop14h 50m
Deal found 3/11£571
Thu 28/110:35 -
1 stop15h 07m
Mon 1/220:47 -
1 stop27h 03m
Deal found 4/11£576
Tue 17/1121:30 -
2 stops24h 00m
Sun 22/1120:10 -
2 stops18h 40m
Deal found 2/11£579
Tue 17/1110:20 -
1 stop12h 25m
Tue 8/1210:38 -
2 stops23h 22m
Deal found 31/10£602
Mon 7/1206:30 -
2 stops16h 20m
Wed 23/1209:29 -
2 stops15h 36m
Deal found 3/11£675
Wed 20/106:50 -
2 stops18h 54m
Sun 24/121:00 -
1 stop15h 35m
Deal found 4/11£694
Thu 3/1210:00 -
2 stops18h 54m
Wed 9/1211:28 -
1 stop14h 22m
Deal found 2/11£701
Mon 7/1206:10 -
1 stop18h 10m
Tue 22/1215:55 -
1 stop12h 40m
Deal found 2/11£580
Sun 27/1207:40 -
Nonstop9h 05m
Sun 10/115:45 -
Nonstop8h 10m
Deal found 4/11£721
Tue 8/1210:40 -
1 stop34h 50m
Thu 14/114:55 -
2 stops18h 55m
Deal found 31/10£731
Mon 7/1208:40 -
2 stops16h 05m
Wed 23/1210:30 -
1 stop14h 20m
Deal found 5/11£675
Tue 17/1108:40 -
2 stops15h 35m
Tue 24/1121:35 -
2 stops14h 15m
Deal found 31/10£752
Thu 3/1208:40 -
2 stops15h 21m
Mon 15/212:42 -
1 stop12h 23m
Deal found 3/11£702
Wed 18/1109:50 -
2 stops19h 57m
Tue 24/1120:42 -
1 stop27h 08m
Deal found 31/10£605
Mon 30/1119:50 -
2 stops26h 55m
Mon 7/1219:10 -
2 stops20h 25m
Deal found 2/11£671
Direct flights to Illinois
Explore direct flight options to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 5 November 2026.
Mon 25/115:40 -
Nonstop9h 05m
Fri 5/217:10 -
Nonstop7h 45m
Deal found 3/11£533
Thu 3/1211:00 -
Nonstop8h 45m
Tue 8/1221:50 -
Nonstop7h 45m
Deal found 5/11£535
Fri 20/1115:40 -
Nonstop9h 05m
Mon 30/1121:50 -
Nonstop7h 45m
Deal found 1/11£547
Mon 30/1111:00 -
Nonstop8h 45m
Fri 4/1221:50 -
Nonstop7h 45m
Deal found 1/11£603
Tue 1/1216:30 -
Nonstop8h 55m
Mon 7/1220:30 -
Nonstop7h 55m
Deal found 3/11£609
Wed 2/1215:40 -
Nonstop9h 05m
Tue 8/1221:50 -
Nonstop7h 45m
Deal found 4/11£613
Mon 16/1115:40 -
Nonstop9h 05m
Tue 8/1217:10 -
Nonstop7h 45m
Deal found 2/11£618
Wed 2/1215:40 -
Nonstop9h 05m
Thu 10/1220:30 -
Nonstop7h 55m
Deal found 1/11£620
Thu 3/1215:40 -
Nonstop9h 05m
Thu 10/1218:40 -
Nonstop7h 55m
Deal found 3/11£622
Tue 8/1215:40 -
Nonstop9h 05m
Sun 13/1221:50 -
Nonstop7h 45m
Deal found 4/11£626
Thu 3/1212:35 -
Nonstop9h 00m
Wed 9/1221:50 -
Nonstop7h 45m
Deal found 3/11£626
Mon 7/1213:35 -
Nonstop9h 20m
Wed 23/1215:45 -
Nonstop8h 10m
Deal found 1/11£627
Last-minute flights to Illinois
Discover last-minute flight deals to Illinois. Data last updated 5 November 2026 and is based on user searches.
Sun 8/1106:00 -
1 stop15h 30m
Sun 15/1120:10 -
1 stop19h 25m
Deal found 31/10£517
Tue 17/1107:45 -
2 stops15h 35m
Mon 23/1118:30 -
2 stops17h 30m
Deal found 2/11£521
Wed 18/1108:00 -
2 stops15h 20m
Sun 22/1118:30 -
2 stops19h 10m
Deal found 31/10£518
Fri 20/1121:35 -
2 stops47h 55m
Sun 6/1220:10 -
1 stop13h 35m
Deal found 2/11£516
Sun 22/1107:45 -
2 stops15h 35m
Thu 3/1218:30 -
2 stops20h 45m
Deal found 31/10£517
Sun 22/1107:00 -
2 stops16h 20m
Thu 3/1218:30 -
2 stops21h 30m
Deal found 31/10£517
Mon 23/1107:00 -
2 stops16h 20m
Sun 29/1118:30 -
2 stops19h 10m
Deal found 31/10£521
Tue 24/1107:05 -
2 stops15h 40m
Mon 30/1119:10 -
2 stops15h 15m
Deal found 1/11£521
Wed 25/1107:00 -
2 stops16h 20m
Wed 2/1218:30 -
2 stops21h 05m
Deal found 31/10£519
Sun 29/1111:05 -
2 stops35h 42m
Sun 6/1214:36 -
2 stops19h 44m
Deal found 1/11£781
Wed 2/1206:20 -
2 stops17h 00m
Sat 5/1218:30 -
2 stops16h 05m
Deal found 2/11£517
Thu 3/1207:05 -
2 stops15h 40m
Mon 15/219:10 -
2 stops20h 25m
Deal found 3/11£516
One-way flights to Illinois
Search for one-way flight options to Illinois. Find affordable one-way fares based on user searches. Data last updated 5 November 2026.
Fri 26/209:00 -
3 stops40h 42m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 31/10£410
Sat 12/1209:00 -
2 stops17h 57m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 2/11£765
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 5 November 2026
Find the latest flights to Illinois in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 7,457,451 searches and data was last updated on 5 November 2026.
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 7,457,451 searches and data was last updated on 5 November 2026.
Use the filters below to find and compare flights to Illinois that are best for you.
Fly from
Route
Depart
Return
Price
Cheapest return flight
LondonChicago
LTN London Luton - ORD Chicago O'Hare Intl
LTNORD
London Luton
Wed 30/12
05:00-21:20
2 stops22h 20m
Chicago O'Hare Intl
Wed 31/12
00:00-07:00
Nonstop0h 00m
£412
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Sun 7/3
20:35-17:20
1 stop26h 45m
Chicago O'Hare Intl
Mon 22/3
19:30-10:50
1 stop10h 20m
£529
LondonChicago
LTN London Luton - ORD Chicago O'Hare Intl
LTNORD
London Luton
Fri 20/11
07:00-17:20
2 stops16h 20m
Chicago O'Hare Intl
Tue 24/11
18:30-22:00
2 stops21h 30m
£538
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Fri 8/1
07:05-16:45
2 stops15h 40m
Chicago O'Hare Intl
Sun 31/1
19:10-18:30
1 stop17h 20m
£564
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Thu 19/11
10:20-16:45
1 stop12h 25m
Chicago O'Hare Intl
Sun 29/11
19:10-16:00
1 stop14h 50m
£571
LondonChicago
LGW London Gatwick - MDW Chicago Midway
LGWMDW
London Gatwick
Thu 28/1
10:35-19:42
1 stop15h 07m
Chicago Midway
Mon 1/2
20:47-05:50
1 stop27h 03m
£576
LondonChicago
LTN London Luton - ORD Chicago O'Hare Intl
LTNORD
London Luton
Tue 17/11
21:30-15:30
2 stops24h 00m
Chicago O'Hare Intl
Sun 22/11
20:10-20:50
2 stops18h 40m
£579
LondonChicago
LTN London Luton - ORD Chicago O'Hare Intl
LTNORD
London Luton
Mon 7/12
06:10-18:20
1 stop18h 10m
Chicago O'Hare Intl
Tue 22/12
15:55-10:35
1 stop12h 40m
£580
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Tue 17/11
10:20-16:45
1 stop12h 25m
Chicago O'Hare Intl
Tue 8/12
10:38-16:00
2 stops23h 22m
£602
LondonChicago
LGW London Gatwick - ORD Chicago O'Hare Intl
LGWORD
London Gatwick
Wed 7/4
21:15-16:00
2 stops48h 45m
Chicago O'Hare Intl
Fri 16/4
17:45-20:25
2 stops20h 40m
£604
Flights are sorted by cheapest return flights first.
Deals found on 1/11
Showing 1-10 of 32 resultsSorted by cheapest first
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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.
LHR-ORD
LTN-ORD
LHR-MLI
LGW-ORD
LHR-PIA
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 to Illinois
LON-USIL
LHR-ORD
LTN-ORD
LHR-MLI
LGW-ORD
How long is the flight to Illinois?
On average, a flight from London to Illinois takes 11 hours 50 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.
Weekly flight availability to Illinois
The most flights from London to Illinois are scheduled on a Wednesday (40 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (29 on average).
What are the most popular airlines that fly to Illinois?
The most popular airlines flying from London to Illinois are British Airways, Icelandair and Lufthansa.
What are the cheapest airlines that fly to Illinois?
The cheapest airlines flying from London to Illinois are Virgin Atlantic, Icelandair and Scandinavian Airlines.
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).
When is the best time to book a flight to Illinois?
The best time to book flights to Illinois is 63 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 5 November 2026.
See what other customers who have flown with Aer Lingus,United Airlines, andIcelandair to the United States have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
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.
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.
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.
When is the best time to fly to Illinois?
Peak Season:
Winter is peak season in Illinois for skiing and snowmobiling. In summer many different festivals take place in Chicago’s parks and neighbourhoods almost every weekend, making it difficult to find a cheap Illinois flight.
Off Season:
The best month to book a cheap Illinois flight is September, which is also the mildest month. Autumn is visually the prettiest time to visit when the temperature is still mild and the foliage is changing. The quietest months in Chicago are from January to March but they can also be the coldest and windiest.
Can I find cheaper flights to Illinois if I am willing to have stopovers?
Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Illinois on Cheapflights that require 1 or 2 stops for potential cost savings.
Based on reviews from Cheapflights users, Aer Lingus is rated the highest out of the airlines that fly to Illinois.
What is the cheapest airport to fly to in Illinois?
Chicago O'Hare Intl is currently the cheapest airport to fly to in Illinois. One-way flights to Chicago O'Hare Intl typically cost £92, while return flights cost around £86.
Yes. Chicago O'Hare Intl has hotels nearby for those requiring accommodations. Hilton Chicago O'Hare Airport is the closest property to Chicago O'Hare Intl (0.0 mi away from Chicago O'Hare Intl).
Not sure where to visit in United States? Start by selecting one of the most popular places in United States below to filter down your possible destination.
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 to Illinois?
Deals for Illinois flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets to Illinois?
Millions of users choose and trust Cheapflights to book the best flight deals to Illinois for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
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.
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