£377 Cheap Flights to Illinois

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Top Cities to Visit in Illinois

Chicago showing a city and a skyscraper as well as a family
FlightsFlights

Chicago

Chicago

Cheap round-trip flights to Illinois

Prices were available within the past 7 days and start at £377 for one-way flights and £412 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Fri, 9 May - Wed, 14 May
LHR
London
ORD
Chicago
£412 Return, found 8 hours ago
£412
Return
found 8 hours ago
Select Icelandair flight, departing Fri, 9 May from London to Chicago, returning Wed, 14 May, priced at £412 found 8 hours ago
Swiss International Air Lines
Wed, 7 May - Sun, 11 May
LHR
London
ORD
Chicago
£415 Return, found 3 days ago
£415
Return
found 3 days ago
Select Swiss International Air Lines flight, departing Wed, 7 May from London to Chicago, returning Sun, 11 May, priced at £415 found 3 days ago
Austrian Airlines
Wed, 7 May - Wed, 14 May
LHR
London
ORD
Chicago
£416 Return, found 7 hours ago
£416
Return
found 7 hours ago
Select Austrian Airlines flight, departing Wed, 7 May from London to Chicago, returning Wed, 14 May, priced at £416 found 7 hours ago
TAP Portugal
Fri, 24 Oct - Fri, 7 Nov
LHR
London
ORD
Chicago
£417 Return, found 7 hours ago
£417
Return
found 7 hours ago
Select TAP Portugal flight, departing Fri, 24 Oct from London to Chicago, returning Fri, 7 Nov, priced at £417 found 7 hours ago
British Airways
Sun, 14 Sep - Fri, 19 Sep
LHR
London
ORD
Chicago
£420 Return, found 2 days ago
£420
Return
found 2 days ago
Select British Airways flight, departing Sun, 14 Sep from London to Chicago, returning Fri, 19 Sep, priced at £420 found 2 days ago
Lufthansa
Thu, 15 May - Thu, 22 May
LHR
London
ORD
Chicago
£420 Return, found 7 hours ago
£420
Return
found 7 hours ago
Select Lufthansa flight, departing Thu, 15 May from London to Chicago, returning Thu, 22 May, priced at £420 found 7 hours ago
United
Sun, 14 Sep - Fri, 19 Sep
LHR
London
ORD
Chicago
£435 Return, found 2 days ago
£435
Return
found 2 days ago
Select United flight, departing Sun, 14 Sep from London to Chicago, returning Fri, 19 Sep, priced at £435 found 2 days ago
American Airlines
Sun, 7 Sep - Fri, 19 Sep
LHR
London
ORD
Chicago
£440 Return, just found
£440
Return
just found
Select American Airlines flight, departing Sun, 7 Sep from London to Chicago, returning Fri, 19 Sep, priced at £440 just found
Iberia
Tue, 9 Sep - Tue, 23 Sep
LHR
London
ORD
Chicago
£442 Return, just found
£442
Return
just found
Select Iberia flight, departing Tue, 9 Sep from London to Chicago, returning Tue, 23 Sep, priced at £442 just found
KLM
Sun, 7 Sep - Fri, 19 Sep
LHR
London
ORD
Chicago
£444 Return, just found
£444
Return
just found
Select KLM flight, departing Sun, 7 Sep from London to Chicago, returning Fri, 19 Sep, priced at £444 just found

Top tips for booking flights to Illinois from UK

Get ready to fly to Illinois

Prepare your luggage and book your flights to Illinois with Expedia. We offer a seamless flight booking experience, with a wide range of Illinois plane tickets to choose from. If you need help finding some of the best deals for cheap flights to Illinois in 2025, we are always available to assist you. Book your flights to Illinois today and let the adventure begin!

Find the best tickets to Illinois

To find some of the best tickets to Illinois in 2025, use Expedia's powerful search engine to compare dates and the different departure and arrival airports for your trip. Whether you're after direct flights to Illinois or last-minute flights to Illinois, you can filter and sort your search results, making it easy to find the ideal flight to Illinois.

Airlines fly to Illinois

There are 20 different airlines that fly to Illinois including some of the most trusted names in the business. To book flights to Illinois with your favourite airline, take a look at Expedia's flight listings and try out different dates to find some of the best Illinois plane tickets.

Find the cheapest flights to Illinois

By booking early you may find some of the best deals for Illinois flights from the UK, including Illinois direct flights. You can usually find affordable and cheap flights to Illinois, whether one-way from £377 or round-trip from £412, with Expedia if you book your trip far enough in advance.

Find the best airports for cheap flights to Illinois

Try searching for different Illinois airports with Expedia to find some of the cheapest flights to Illinois. Flights from London (LHR) to Chicago (ORD) usually have the lowest price from £377.

Why book your flights to Illinois with Expedia

Expedia offers great deals on Illinois air fares from £377 to cater to every budget. Not only is Expedia one of the top platforms to book flights to Illinois from the UK, it is also your one-stop shop for booking hotels, car rentals, and more.

 

*Prices and availability are subject to change. Additional terms apply.

Illinois Flights Information

Airlines serving
TAP Portugal, Icelandair, JetBlue Airways, Aer Lingus, Iberia, British Airways, Delta, Air France, Virgin Atlantic, Swiss International Air Lines, Austrian Airlines, Lufthansa, United, American Airlines, KLM
Roundtrip price
from £412

Frequently asked questions

How do I find cheap flights to Illinois that have flexible change policies?
Search for cheap flights to Illinois, then tick the “No change fee” box under the “Flexible change policies” heading. From then on it’s smooth sailing. We understand that travel plans change and flexibility is essential, so book with confidence with Expedia.
Which airlines fly to Illinois?
Whether you’re travelling somewhere new or rendezvousing at a favourite haunt, these airlines are waiting to take you into or near Illinois:

  • United Airlines - 13,063 flights to or near Illinois each month, including 12,950 flights to O’Hare Intl. Airport (ORD) and 108 flights to Quad City Intl. Airport (MLI) per month.
  • American Airlines - 8,977 flights to or near Illinois each month, including 8,855 flights to O’Hare Intl. Airport (ORD) and 121 flights to Quad City Intl. Airport (MLI) per month.
  • Southwest Airlines - 5,997 flights to or near Illinois each month, including 5,334 flights to Midway Intl. Airport (MDW) and 663 flights to O’Hare Intl. Airport (ORD) per month.

How can I find cheap tickets to Illinois?
One of the easiest ways to find cheap tickets to Illinois is to be flexible with your travel dates. Search for your flights, then click “flexible dates” at the top of your results. It’ll reveal the cheapest prices for nearby days. The lowest price for a flight to Illinois in the last seven days was £412. Booking well in advance will generally help you score an even bigger bargain.
How much is a flight to Illinois?
There were plenty of bargain fares up for grabs in the last seven days, with the cost of a return airfare to Illinois ranging between £412 and £444. Many lucky travellers nabbed one-way tickets from London (LHR) for as little as £377.
What are the most popular airports to fly into in Illinois?
Touch down at one of these top Illinois airports and you’ll be perfectly placed to discover all that this wonderful region has to offer:

  • O’Hare Intl. Airport (ORD) - 25,318 flights per month.
  • Midway Intl. Airport (MDW) - 5,962 flights per month.
  • Quad City Intl. Airport (MLI) - 325 flights per month.

When is the cheapest time to fly to Illinois?
Take off for Illinois early in the week and you’ll usually be rewarded more economical fares. Tuesday is typically the cheapest day to hop on a plane, followed by Monday. If you’re hoping to avoid the most expensive flights, steer clear of Saturdays.
How much is a plane ticket to Illinois?
In the last seven days, plane fares to Illinois ranged from £412 to £444.
What is the best time to go to Illinois?
A terrific time to check out Chicago is after June 20 when the summer season starts. In Illinois’s main city, average temperatures range from 18ºC to 24ºC at this time — ideal weather for sightseeing! May, June and August are the most popular months to head to this hot spot.
What months are the cheapest to book a flight to Illinois?
The top month to purchase affordable flights to Illinois is February. Remember that in the U.S, an expensive time to reserve a ticket is during the busy month of December.

Trending flights to Illinois

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Fri, 9 May - Wed, 14 May
LHR
London
ORD
Chicago
£412 Return, found 8 hours ago
£412
Return
found 8 hours ago
Select Icelandair flight, departing Fri, 9 May from London to Chicago, returning Wed, 14 May, priced at £412 found 8 hours ago
*Available to Expedia members.