GBP/GB
Find cheap flights to Illinois in 2026/2027 from £373 This is the cheapest return flight found to Illinois from UK on FlightsFinder on March 14th 2026 at 10:55. This offer may no longer be available. Click the offer to check live prices & dates of travel.
Our Flight Finder compares the cheapest flights to Illinois from the most established flight comparison sites.
Fly to Illinois and visit sites like Millennium Park, Willis Tower, Navy Pier & The Art Institute of Chicago.
1. Enter your search requirements for Illinois
2. Compare the best Illinois deals from top comparison engines
3. Book your Illinois flight at the cheapest price
These economy flights were found on FlightsFinder from UK to Illinois in the last few days. Prices subject to availability.
These economy flights were found on FlightsFinder from UK to Illinois in the last few days. Prices subject to availability.
According to our data, March is on average the cheapest time to book flights to Illinois.
You can get flights from £373 return.
According to our data, July is on average the most expensive time to book flights to Illinois.
A return flight could set you back more than £520.
Illinois, known as the "Land of Lincoln," is a vibrant state in the heart of the Midwest, offering a diverse range of experiences for visitors. From the iconic skyline of Chicago with its towering skyscrapers and cultural attractions, to the charming small towns scattered throughout the state, Illinois blends urban excitement with rural charm. Explore the picturesque vineyards of the Shawnee Hills Wine Trail, wander through the historic neighborhoods of Springfield, or take in a show at one of the many theaters in the state. With its rich history, dynamic cities, and scenic landscapes, Illinois promises a memorable adventure for travelers of all interests.
A good price for a flight to Chicago is £336 - £410.
Some popular airports near the city of Illinois include O'Hare International Airport (ORD), Midway International Airport (MDW), and Chicago Rockford International Airport (RFD).
The flight to Illinois (CHI) is roughly 9 hours 15 minutes and 3,942 miles (6,344 kilometres) from London, England UK - Heathrow International Airport (LHR).
The best way is to compare flights to Illinois from leading comparison sites using our search engine dashboard.
Yes, there are direct flights to Illinois.
Here is the average weather forecast in Illinois by month:
• Jan: -0°C
• Feb: 2°C
• Mar: 8°C
• Apr: 15°C
• May: 21°C
• Jun: 27°C
• Jul: 29°C
• Aug: 28°C
• Sep: 24°C
• Oct: 17°C
• Nov: 9°C
• Dec: 2°C
The main airport in Illinois, O'Hare International Airport, is approximately 17 miles from downtown Chicago.
Typically, flights are cheapest to Illinois 2 months before departure.
Studies show flights to Illinois are typically cheaper on Tuesdays and Wednesdays.
7.2 °C
Sun, 15 Mar 2026
Average Temperature
-0°C
Jan
2°C
Feb
8°C
Mar
15°C
Apr
21°C
May
27°C
Jun
29°C
Jul
28°C
Aug
24°C
Sep
17°C
Oct
9°C
Nov
2°C
Dec
Select a City Below to see the Cheapest Flights to Illinois:
Chicago, Illinois | Peoria, Illinois | Moline, Illinois | Springfield, Illinois | Marion, Illinois | Bloomington, Illinois
London, England UK - Heathrow International Airport (LHR) to Illinois (CHI)
Distance:
3,942 miles (6,344 kilometres)
Average flight time (direct 9 hours 15 minutes)
London, England UK - London Gatwick International Airport (LGW) to Illinois (CHI)
Distance:
3,963 miles (6,378 kilometres)
Average flight time (direct 9 hours 18 minutes)
Manchester, England UK - Manchester Airport (MAN) to Illinois (CHI)
Distance:
3,815 miles (6,140 kilometres)
Average flight time (direct 8 hours 58 minutes)
London, England UK - London North East - Stansted International Airport (STN) to Illinois (CHI)
Distance:
3,955 miles (6,365 kilometres)
Average flight time (direct 9 hours 17 minutes)
London, England UK - London North, Luton International Airport (LTN) to Illinois (CHI)
Distance:
3,933 miles (6,329 kilometres)
Average flight time (direct 9 hours 14 minutes)
Edinburgh, Scotland UK - Airport (EDI) to Illinois (CHI)
Distance:
3,702 miles (5,957 kilometres)
Average flight time (direct 8 hours 43 minutes)
Birmingham, England UK - Birmingham Airport (BHX) to Illinois (CHI)
Distance:
3,862 miles (6,216 kilometres)
Average flight time (direct 9 hours 4 minutes)
Bristol, UK - Bristol Airport (BRS) to Illinois (CHI)
Distance:
3,858 miles (6,209 kilometres)
Average flight time (direct 9 hours 4 minutes)
Glasgow, Scotland UK - Glasgow International Airport (GLA) to Illinois (CHI)
Distance:
3,666 miles (5,900 kilometres)
Average flight time (direct 8 hours 38 minutes)
Belfast, Ireland UK - Belfast International Airport (BFS) to Illinois (CHI)
Distance:
3,633 miles (5,846 kilometres)
Average flight time (direct 8 hours 34 minutes)
Newcastle, UK - Newcastle International Airport (NCL) to Illinois (CHI)
Distance:
3,787 miles (6,095 kilometres)
Average flight time (direct 8 hours 54 minutes)
London, England UK - Royal Docks - London City Airport (LCY) to Illinois (CHI)
Distance:
3,961 miles (6,374 kilometres)
Average flight time (direct 9 hours 18 minutes)
Liverpool, UK - John Lennon Airport (LPL) to Illinois (CHI)
Distance:
3,795 miles (6,107 kilometres)
Average flight time (direct 8 hours 55 minutes)
Nottingham, UK - East Midlands Airport (EMA) to Illinois (CHI)
Distance:
3,867 miles (6,223 kilometres)
Average flight time (direct 9 hours 5 minutes)
Leeds, UK - Leeds/Bradford Airport (LBA) to Illinois (CHI)
Distance:
3,823 miles (6,152 kilometres)
Average flight time (direct 8 hours 59 minutes)
Aberdeen, Scotland UK - Dyce Airport (ABZ) to Illinois (CHI)
Distance:
3,709 miles (5,969 kilometres)
Average flight time (direct 8 hours 44 minutes)
Belfast, Ireland UK - George Best City Apt Airport (BHD) to Illinois (CHI)
Distance:
3,646 miles (5,868 kilometres)
Average flight time (direct 8 hours 36 minutes)
London, England UK - London South, Southend Airport (SEN) to Illinois (CHI)
Distance:
3,983 miles (6,410 kilometres)
Average flight time (direct 9 hours 21 minutes)
Southampton, UK - Southampton Airport (SOU) to Illinois (CHI)
Distance:
3,924 miles (6,316 kilometres)
Average flight time (direct 9 hours 13 minutes)
Jersey, UK - Jersey Airport (JER) to Illinois (CHI)
Distance:
3,948 miles (6,353 kilometres)
Average flight time (direct 9 hours 16 minutes)
Cardiff, Wales - UK - Cardiff Airport (CWL) to Illinois (CHI)
Distance:
3,834 miles (6,170 kilometres)
Average flight time (direct 9 hours 1 minute)
Doncaster, UK - Sheffield/ Robin Hood Airport (DSA) to Illinois (CHI)
Distance:
3,859 miles (6,210 kilometres)
Average flight time (direct 9 hours 4 minutes)
From London (LHR), UK to Chicago, United States (ORD): £373
Depart: 18 Mar 2026 · Return: 12 Apr 2026 Price found 14 Mar 2026, 10:55
From Birmingham (BHX), UK to Chicago, United States (ORD): £387
Depart: 17 Apr 2026 · Return: 24 Apr 2026 Price found 14 Mar 2026, 15:07
From Manchester (MAN), UK to Chicago, United States (ORD): £438
Depart: 16 Apr 2026 · Return: 25 Apr 2026 Price found 13 Mar 2026, 09:29
From Edinburgh (EDI), UK to Chicago, United States (ORD): £441
Depart: 16 Apr 2026 · Return: 25 Apr 2026 Price found 11 Mar 2026, 12:33
From Bristol (BRS), UK to Chicago, United States (ORD): £447
Depart: 27 Apr 2026 · Return: 04 May 2026 Price found 13 Mar 2026, 16:07
From Glasgow (GLA), UK to Chicago, United States (ORD): £455
Depart: 28 Apr 2026 · Return: 08 May 2026 Price found 11 Mar 2026, 11:10
From Leeds (LBA), UK to Chicago, United States (ORD): £455
Depart: 26 Apr 2026 · Return: 03 May 2026 Price found 12 Mar 2026, 11:13
From Liverpool (LPL), UK to Chicago, United States (MDW): £480
Depart: 26 Apr 2026 · Return: 03 May 2026 Price found 12 Mar 2026, 14:07
From Newcastle (NCL), UK to Chicago, United States (ORD): £491
Depart: 20 Apr 2026 · Return: 04 May 2026 Price found 11 Mar 2026, 14:14
From Cardiff (CWL), UK to Chicago, United States (MDW): £512
Depart: 26 Apr 2026 · Return: 03 May 2026 Price found 12 Mar 2026, 07:35
From Belfast (BFS), UK to Chicago, United States (ORD): £523
Depart: 13 Apr 2026 · Return: 20 Apr 2026 Price found 13 Mar 2026, 17:00
From Nottingham (EMA), UK to Chicago, United States (MDW): £555
Depart: 25 Apr 2026 · Return: 09 May 2026 Price found 12 Mar 2026, 17:52
From Southampton (SOU), UK to Chicago, United States (ORD): £588
Depart: 14 Apr 2026 · Return: 21 Apr 2026 Price found 14 Mar 2026, 07:24
From Aberdeen (ABZ), UK to Chicago, United States (ORD): £593
Depart: 25 Aug 2026 · Return: 01 Sep 2026 Price found 14 Mar 2026, 17:17
USD/USA
EUR/Ireland
AUD/Australia
CAD/Canada
INR/India
AED/United Arab Emirates
HKD/Hong Kong
ILS/Israel
MYR/Malaysia
NZD/New Zealand
PHP/Philippines
SAR/Saudi Arabia
SGD/Singapore
ZAR/South Africa
IDR/Indonesia