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£67+ Cheap flights from Illinois

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ORD — LHR
6 Apr — 13 Apr1
1 adult
1 adult, Economy, 0 bags

What to know about flights from Illinois

Discover essential information about flights departing from Illinois, including flight schedules, destinations, airlines operating at the Illinois airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 7 March 2026.

Good round-trip deal

£67 or less

Good one-way deal

£26 or less
Price to beat on a round-trip flight from Illinois.
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Price to beat on a one-way flight from Illinois.
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Find flights from Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Illinois
Explore the most affordable flight options available from Illinois. Find the lowest fares based on data from user searches, with prices last updated on 7 March 2026.

Sat 25/419:25
ORD
-
GLA
1 stop12h 10m
Icelandair
Wed 29/414:20
GLA
-
ORD
1 stop9h 55m
Icelandair
Deal found 4/3£399
Mon 27/419:25
ORD
-
GLA
1 stop12h 00m
Icelandair
Tue 12/514:20
GLA
-
ORD
1 stop9h 55m
Icelandair
Deal found 6/3£404
Tue 18/822:25
ORD
-
GLA
1 stop9h 00m
Icelandair
Tue 25/814:20
GLA
-
ORD
1 stop9h 55m
Icelandair
Deal found 5/3£407
Mon 27/419:15
ORD
-
EDI
2 stops20h 20m
Multiple Airlines
Fri 15/516:55
EDI
-
ORD
3 stops29h 15m
Multiple Airlines
Deal found 3/3£411
Mon 13/419:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Sun 19/415:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Deal found 2/3£413
Sat 15/822:25
ORD
-
GLA
1 stop9h 00m
Icelandair
Tue 25/814:20
GLA
-
ORD
1 stop9h 55m
Icelandair
Deal found 3/3£415
Tue 28/419:25
ORD
-
EDI
2 stops18h 10m
Multiple Airlines
Tue 12/506:15
EDI
-
ORD
2 stops18h 00m
Multiple Airlines
Deal found 4/3£417
Tue 5/519:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Tue 12/513:05
LHR
-
ORD
1 stop11h 10m
Icelandair
Deal found 4/3£420
Sun 10/522:25
ORD
-
LGW
1 stop10h 15m
Icelandair
Tue 19/515:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Deal found 3/3£420
Mon 27/419:25
ORD
-
GLA
1 stop12h 00m
Icelandair
Wed 13/514:30
GLA
-
ORD
1 stop12h 55m
Icelandair
Deal found 6/3£420
Fri 1/522:25
ORD
-
LHR
1 stop15h 55m
Icelandair
Wed 13/513:05
LHR
-
ORD
1 stop11h 10m
Icelandair
Deal found 3/3£421
Wed 13/522:25
ORD
-
LGW
1 stop10h 15m
Icelandair
Tue 19/515:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Deal found 2/3£421

Find flights from Illinois within your budget

 
Find flights departing from Illinois that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 7 March 2026. In the last 7 days, Cheapflights users made a total of 858,174 searches

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 8/4

15:45-09:00

1 stop11h 15m

London Luton

Mon 13/4

08:15-14:00

1 stop11h 45m

£461

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 22/4

15:45-09:00

1 stop11h 15m

London Luton

Mon 27/4

08:15-14:00

1 stop11h 45m

£496

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 23/3

18:20-10:25

1 stop11h 05m

London Heathrow

Tue 31/3

08:00-10:55

Nonstop8h 55m

£499

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Mon 20/4

15:45-12:45

1 stop15h 00m

London Luton

Mon 27/4

08:15-14:00

1 stop11h 45m

£501

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 13/4

17:59-13:45

2 stops13h 46m

London Heathrow

Tue 28/4

06:30-16:50

2 stops16h 20m

£509

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

Mon 4/5

11:08-08:25

2 stops15h 17m

Glasgow Intl

Mon 11/5

13:30-14:15

1 stop30h 45m

£509
Fastest return journey

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 29/4

20:35-10:30

Nonstop7h 55m

London Heathrow

Tue 5/5

14:45-17:35

Nonstop8h 50m

£513

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 30/3

13:39-10:30

2 stops14h 51m

London Heathrow

Tue 14/4

06:15-16:42

2 stops16h 27m

£513

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 18/8

18:45-09:00

Nonstop8h 15m

London Heathrow

Wed 26/8

14:10-17:15

Nonstop9h 05m

£515

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 29/3

10:40-06:45

1 stop14h 05m

London Heathrow

Thu 23/4

08:40-14:15

1 stop11h 35m

£516

Flights are sorted by cheapest return flights first.

Deals found on 2/3

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Illinois

Have a flexible travel schedule? Discover the best time to fly from Illinois with our price prediction graph.
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.

Travel insights for flights from Illinois

Get recent, data-driven insights about flights from Illinois including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Illinois?

Currently, May is the cheapest month in which you can book a flight from Illinois (average of £292). Flying from Illinois in June will prove the most costly (average of £663). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

Which airlines fly from Illinois?

Many airlines operate round-trip flights from Illinois: British Airways, Iberia, Aer Lingus, United Airlines, Finnair. These airlines fly to the following popular destinations: London.

British Airways
British Airways
From £376
Aer Lingus
Aer Lingus
From £313
American Airlines
American Airlines
From £72
Etihad Airways
Etihad Airways
From £573

What is the cheapest place to fly to from Illinois?

The cheapest city to fly to from Illinois is New York, with prices starting at £23. Explore other affordable destinations below.

New York
New York
From £23
Las Vegas Harry Reid Intl
Las Vegas Harry Reid Intl
From £26
Miami
Miami
From £41
Orlando
Orlando
From £54

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Direct flights from USA

Book a direct flight from one of these other cities located in USA.
Direct flights from Peoria
Direct flights from Bloomington
Direct flights from Marion
Direct flights from St. Louis

Related info for your journey

Access useful and relevant information related to your journey from Illinois. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 7 March 2026.

  • What is the cheapest airport to fly out of Illinois?

    Chicago O'Hare Intl airport offers the cheapest routes to Almaty, from £337; whereas Chicago Midway airport is typically cheaper if you're flying to Edinburgh, from £527. It's best to make sure you are flexible on dates to find the cheapest possible flight options for your journey.

  • What is the cheapest month to fly from Illinois?

    At the present moment the cheapest month to fly from Illinois is currently May; with June being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • Where are the cheapest places to fly to from Illinois?

    Check out the cheapest flights from Illinois to embark to:
    Travel from Chicago to London from £337 round trip
    Travel from Chicago to Manchester from £375 round trip
    Travel from Chicago to Edinburgh from £381 round trip
    Travel from Chicago to Glasgow from £414 round trip
    Travel from Chicago to Almaty from £949 round trip

  • How does Cheapflights help users find flights from Illinois?

    Cheapflights makes it easy to find flights from Illinois by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

  • Why should you use Cheapflights to find cheap flight tickets from Illinois?

    Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Illinois for you. Better yet — we are completely free to use.

  • Can Cheapflights find flights from Illinois with no change fees?

    Need flexible booking options for your flight from Illinois ? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

  • Can Cheapflights notify me if prices for flights from Illinois become cheaper?

    Not ready to book yet? You can track prices for flights from Illinois on Cheapflights with our Price Alerts feature and get notified when better prices are available.

See more FAQs

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How does Cheapflights help users find flights from Illinois?

Cheapflights makes it easy to find flights from Illinois by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Illinois?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Illinois for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Illinois with no change fees?

Need flexible booking options for your flight from Illinois ? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Illinois become cheaper?

Not ready to book yet? You can track prices for flights from Illinois on Cheapflights with our Price Alerts feature and get notified when better prices are available.

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