This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/11. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
29 Nov — 6 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 30 October 2026.
Thu 19/1111:00 -
Nonstop8h 45m
Mon 30/1121:50 -
Nonstop7h 45m
Deal found 25/10£518
Mon 23/1119:30 -
2 stops27h 50m
Mon 7/1218:30 -
2 stops21h 15m
Deal found 25/10£519
Thu 3/1206:40 -
1 stop16h 05m
Sat 16/119:10 -
1 stop32h 10m
Deal found 26/10£519
Thu 5/1116:00 -
1 stop29h 30m
Fri 4/1220:10 -
2 stops30h 10m
Deal found 27/10£520
Mon 23/1111:00 -
Nonstop8h 45m
Fri 27/1117:10 -
Nonstop7h 45m
Deal found 25/10£520
Thu 19/1106:40 -
1 stop16h 05m
Thu 3/1219:10 -
1 stop14h 50m
Deal found 25/10£521
Fri 4/1207:00 -
2 stops16h 20m
Sun 6/1218:30 -
2 stops21h 30m
Deal found 28/10£521
Tue 17/1110:20 -
1 stop12h 25m
Thu 3/1219:10 -
1 stop14h 50m
Deal found 25/10£522
Tue 24/1107:45 -
2 stops15h 35m
Mon 30/1118:30 -
2 stops17h 30m
Deal found 25/10£522
Wed 25/1109:50 -
2 stops19h 28m
Wed 2/1219:00 -
1 stop14h 05m
Deal found 28/10£522
Wed 11/1106:00 -
1 stop15h 30m
Sun 22/1120:10 -
1 stop20h 30m
Deal found 29/10£522
Mon 23/1121:35 -
2 stops47h 55m
Sun 29/1120:10 -
1 stop13h 35m
Deal found 27/10£523
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 30 October 2026.
Sat 21/1107:35 -
2 stops15h 45m
Sat 28/1118:30 -
2 stops22h 10m
Deal found 25/10£532
Fri 20/1106:40 -
1 stop16h 05m
Fri 11/1219:10 -
1 stop14h 50m
Deal found 26/10£582
Fri 20/1121:35 -
2 stops47h 55m
Fri 11/1220:10 -
1 stop31h 40m
Deal found 26/10£617
Mon 23/1116:30 -
Nonstop8h 55m
Mon 7/1220:30 -
Nonstop7h 55m
Deal found 26/10£666
Mon 7/1213:35 -
Nonstop9h 20m
Wed 23/1221:50 -
Nonstop8h 10m
Deal found 29/10£669
Mon 7/1208:40 -
2 stops16h 05m
Tue 22/1207:45 -
1 stop16h 35m
Deal found 28/10£675
Wed 3/206:30 -
2 stops16h 23m
Mon 8/206:00 -
1 stop18h 25m
Deal found 28/10£684
Tue 23/210:00 -
2 stops18h 10m
Tue 2/317:59 -
2 stops15h 46m
Deal found 27/10£721
Mon 14/1213:35 -
1 stop15h 24m
Mon 21/1219:18 -
1 stop10h 42m
Deal found 30/10£783
Wed 18/1109:15 -
2 stops15h 00m
Sun 22/1116:10 -
1 stop14h 40m
Deal found 25/10£783
Thu 10/1212:45 -
2 stops17h 37m
Thu 17/1205:10 -
1 stop19h 45m
Deal found 26/10£1,034
Sat 28/1108:40 -
1 stop11h 45m
Sun 6/1216:25 -
1 stop9h 45m
Deal found 29/10£1,055
Thu 18/207:00 -
2 stops16h 20m
Tue 23/218:30 -
2 stops21h 30m
Deal found 26/10£539
Sat 21/1115:35 -
2 stops31h 10m
Sat 28/1119:10 -
2 stops15h 50m
Deal found 25/10£591
Tue 12/107:00 -
2 stops16h 20m
Fri 15/118:30 -
2 stops19h 55m
Deal found 26/10£546
Sun 22/1106:40 -
1 stop16h 05m
Sat 28/1119:10 -
2 stops20h 10m
Deal found 29/10£595
Tue 8/1208:40 -
2 stops15h 21m
Thu 14/110:47 -
1 stop15h 03m
Deal found 25/10£678
Sat 21/1107:20 -
2 stops16h 00m
Mon 30/1118:30 -
2 stops13h 40m
Deal found 29/10£563
Mon 23/1110:00 -
1 stop12h 15m
Mon 30/1114:44 -
2 stops19h 01m
Deal found 26/10£689
Wed 2/1219:30 -
1 stop27h 15m
Tue 8/1210:38 -
2 stops25h 52m
Deal found 27/10£597
Mon 7/1206:20 -
2 stops16h 30m
Tue 22/1209:29 -
1 stop15h 36m
Deal found 27/10£681
Wed 18/1107:30 -
1 stop16h 50m
Sun 22/1115:55 -
1 stop17h 15m
Deal found 25/10£570
Mon 7/1208:55 -
1 stop19h 59m
Tue 22/1209:29 -
1 stop15h 36m
Deal found 27/10£691
Sat 28/1111:05 -
1 stop31h 05m
Sat 5/1218:15 -
1 stop10h 35m
Deal found 29/10£774
Thu 5/1110:10 -
2 stops35h 20m
Sat 21/1117:30 -
2 stops21h 10m
Deal found 25/10£801
Sun 29/1117:20 -
1 stop28h 30m
Sat 5/1217:47 -
1 stop32h 03m
Deal found 25/10£810
Wed 27/106:30 -
2 stops16h 24m
Mon 1/217:45 -
1 stop11h 55m
Deal found 28/10£684
Mon 23/1109:40 -
2 stops19h 14m
Mon 30/1109:30 -
2 stops15h 35m
Deal found 26/10£694
Wed 13/110:00 -
2 stops18h 17m
Thu 21/110:51 -
2 stops16h 09m
Deal found 25/10£848
Thu 10/1219:05 -
2 stops23h 05m
Sun 13/1215:40 -
2 stops15h 10m
Deal found 28/10£854
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 30 October 2026.
Thu 19/1111:00 -
Nonstop8h 45m
Mon 30/1121:50 -
Nonstop7h 45m
Deal found 25/10£518
Mon 23/1111:00 -
Nonstop8h 45m
Fri 27/1117:10 -
Nonstop7h 45m
Deal found 25/10£520
Wed 6/111:00 -
Nonstop8h 45m
Wed 13/121:50 -
Nonstop7h 45m
Deal found 25/10£522
Fri 20/1111:00 -
Nonstop8h 45m
Mon 30/1121:50 -
Nonstop7h 45m
Deal found 25/10£524
Wed 18/1111:00 -
Nonstop8h 45m
Sat 28/1117:10 -
Nonstop7h 45m
Deal found 25/10£533
Wed 18/1111:00 -
Nonstop8h 45m
Mon 30/1121:50 -
Nonstop7h 45m
Deal found 25/10£534
Thu 7/115:40 -
Nonstop9h 05m
Thu 14/121:50 -
Nonstop7h 45m
Deal found 25/10£536
Fri 13/1115:40 -
Nonstop9h 05m
Wed 9/1221:50 -
Nonstop7h 45m
Deal found 28/10£537
Mon 23/1115:40 -
Nonstop9h 05m
Wed 2/1221:50 -
Nonstop7h 45m
Deal found 25/10£538
Tue 17/1115:40 -
Nonstop9h 05m
Mon 30/1121:50 -
Nonstop7h 45m
Deal found 25/10£539
Wed 6/111:00 -
Nonstop8h 45m
Mon 11/117:10 -
Nonstop7h 45m
Deal found 25/10£540
Wed 18/1115:40 -
Nonstop9h 05m
Tue 1/1217:10 -
Nonstop7h 45m
Deal found 25/10£541
Last-minute flights to Illinois
Discover last-minute flight deals to Illinois. Data last updated 30 October 2026 and is based on user searches.
Thu 5/1116:00 -
1 stop29h 30m
Fri 4/1220:10 -
2 stops30h 10m
Deal found 27/10£520
Mon 9/1122:35 -
2 stops24h 45m
Tue 17/1118:30 -
2 stops13h 35m
Deal found 28/10£521
Wed 11/1106:00 -
1 stop15h 30m
Sun 22/1120:10 -
1 stop20h 30m
Deal found 29/10£522
Thu 12/1106:35 -
2 stops16h 12m
Mon 16/1110:43 -
1 stop13h 12m
Deal found 27/10£875
Thu 12/1119:50 -
2 stops25h 40m
Sun 15/1120:10 -
1 stop21h 40m
Deal found 25/10£518
Thu 12/1110:25 -
1 stop12h 22m
Mon 16/1117:30 -
1 stop12h 30m
Deal found 27/10£898
Thu 12/1106:30 -
3 stops46h 39m
Mon 16/1106:02 -
3 stops47h 03m
Deal found 27/10£10,535
Sat 14/1107:30 -
2 stops19h 52m
Mon 16/1110:40 -
1 stop15h 15m
Deal found 29/10£777
Sat 14/1107:30 -
2 stops19h 52m
Wed 18/1110:40 -
1 stop15h 15m
Deal found 29/10£871
Sat 14/1106:50 -
2 stops17h 02m
Wed 18/1114:31 -
2 stops12h 39m
Deal found 29/10£872
Tue 17/1110:20 -
1 stop12h 25m
Thu 3/1219:10 -
1 stop14h 50m
Deal found 25/10£522
Thu 19/1111:00 -
Nonstop8h 45m
Mon 30/1121:50 -
Nonstop7h 45m
Deal found 25/10£518
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 30 October 2026.
Fri 20/1108:10 -
2 stops15h 10m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 25/10£407
Thu 19/1109:00 -
2 stops18h 22m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 30/10£950
Wed 9/1209:00 -
2 stops31h 10m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 28/10£620
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 30 October 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 30 October 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 30 October 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
Fastest return journey
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Fri 25/12
06:00-15:30
1 stop15h 30m
Chicago O'Hare Intl
Wed 31/12
00:00-07:00
Nonstop0h 00m
£413
LondonChicago
LTN London Luton - ORD Chicago O'Hare Intl
LTNORD
London Luton
Sat 21/11
07:35-17:20
2 stops15h 45m
Chicago O'Hare Intl
Sat 28/11
18:30-22:40
2 stops22h 10m
£532
LondonChicago
LTN London Luton - ORD Chicago O'Hare Intl
LTNORD
London Luton
Thu 18/2
07:00-17:20
2 stops16h 20m
Chicago O'Hare Intl
Tue 23/2
18:30-22:00
2 stops21h 30m
£539
LondonChicago
LTN London Luton - ORD Chicago O'Hare Intl
LTNORD
London Luton
Tue 12/1
07:00-17:20
2 stops16h 20m
Chicago O'Hare Intl
Fri 15/1
18:30-20:25
2 stops19h 55m
£546
LondonChicago
LTN London Luton - ORD Chicago O'Hare Intl
LTNORD
London Luton
Sat 21/11
07:20-17:20
2 stops16h 00m
Chicago O'Hare Intl
Mon 30/11
18:30-14:10
2 stops13h 40m
£563
LondonChicago
LTN London Luton - ORD Chicago O'Hare Intl
LTNORD
London Luton
Wed 18/11
07:30-18:20
1 stop16h 50m
Chicago O'Hare Intl
Sun 22/11
15:55-15:10
1 stop17h 15m
£570
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Fri 20/11
06:40-16:45
1 stop16h 05m
Chicago O'Hare Intl
Fri 11/12
19:10-16:00
1 stop14h 50m
£582
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Sat 21/11
15:35-16:45
2 stops31h 10m
Chicago O'Hare Intl
Sat 28/11
19:10-17:00
2 stops15h 50m
£591
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Sun 22/11
06:40-16:45
1 stop16h 05m
Chicago O'Hare Intl
Sat 28/11
19:10-21:20
2 stops20h 10m
£595
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Wed 2/12
19:30-16:45
1 stop27h 15m
Chicago O'Hare Intl
Tue 8/12
10:38-18:30
2 stops25h 52m
£597
Flights are sorted by cheapest return flights first.
Deals found on 25/10
Showing 1-10 of 33 resultsSorted by cheapest first
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2
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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
LHR-MLI
LHR-PIA
STN-ORD
LGW-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 to Illinois
LON-USIL
LHR-ORD
LHR-MLI
LHR-PIA
STN-ORD
How long is the flight to Illinois?
On average, a flight from London to Illinois takes 12 hours 4 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.
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 79 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 30 October 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 £105, while return flights cost around £87.
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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