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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 15/2. 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
29 Jan — 5 Feb1
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 30 December 2025.

Good round-trip deal

£43 or less

Good one-way deal

£43 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 30 December 2025.

Sun 25/118:30ORD - GLA
1 stop9h 25mIcelandair
Sun 1/212:35GLA - ORD
1 stop10h 45mIcelandair
Deal found 28/12£356
Tue 14/419:25ORD - GLA
1 stop12h 00mIcelandair
Tue 28/414:20GLA - ORD
1 stop9h 55mIcelandair
Deal found 29/12£364
Tue 3/218:30ORD - GLA
1 stop9h 25mIcelandair
Sat 7/212:35GLA - ORD
1 stop10h 45mIcelandair
Deal found 29/12£364
Thu 22/118:30ORD - GLA
1 stop9h 25mIcelandair
Thu 26/212:35GLA - ORD
1 stop10h 45mIcelandair
Deal found 29/12£373
Fri 1/522:25ORD - GLA
1 stop9h 00mIcelandair
Thu 7/514:20GLA - ORD
1 stop9h 55mIcelandair
Deal found 29/12£374
Sun 25/119:10ORD - GLA
2 stops22h 00mMultiple Airlines
Sun 1/207:25GLA - ORD
2 stops15h 30mMultiple Airlines
Deal found 27/12£376
Mon 23/319:30ORD - GLA
1 stop9h 25mIcelandair
Tue 31/314:20GLA - ORD
1 stop9h 55mIcelandair
Deal found 27/12£384
Sun 5/422:25ORD - GLA
1 stop9h 00mIcelandair
Sat 11/414:20GLA - ORD
1 stop9h 55mIcelandair
Deal found 28/12£385
Sun 26/422:25ORD - GLA
1 stop9h 00mIcelandair
Sat 2/514:20GLA - ORD
1 stop9h 55mIcelandair
Deal found 28/12£394
Fri 1/522:25ORD - GLA
1 stop9h 00mIcelandair
Tue 12/514:20GLA - ORD
1 stop9h 55mIcelandair
Deal found 29/12£396
Wed 8/419:25ORD - GLA
1 stop12h 00mIcelandair
Tue 14/414:20GLA - ORD
1 stop9h 55mIcelandair
Deal found 29/12£397
Tue 14/419:25ORD - LHR
1 stop10h 30mIcelandair
Tue 21/413:05LHR - ORD
1 stop11h 10mIcelandair
Deal found 29/12£399

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 30 December 2025. In the last 7 days, Cheapflights users made a total of 858,174 searches

Fly to

Heathrow

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 14/4

19:25-11:55

1 stop10h 30m

London Heathrow

Fri 24/4

13:05-18:15

1 stop11h 10m

£399

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 14/4

19:25-11:55

1 stop10h 30m

London Heathrow

Wed 22/4

13:05-18:15

1 stop11h 10m

£399

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 20/4

19:25-11:55

1 stop10h 30m

London Heathrow

Sun 26/4

21:25-18:15

1 stop26h 50m

£400

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 18/4

19:25-11:55

1 stop10h 30m

London Heathrow

Mon 27/4

21:25-18:15

1 stop26h 50m

£400

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Mon 12/1

18:30-21:20

2 stops20h 50m

London Stansted

Tue 20/1

08:30-17:20

2 stops14h 50m

£406

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 11/2

13:13-19:50

3 stops24h 37m

London Luton

Wed 18/2

05:45-18:25

2 stops18h 40m

£413

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Mon 12/1

12:50-20:00

2 stops25h 10m

London Stansted

Mon 19/1

16:45-14:55

3 stops28h 10m

£414

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 11/3

19:30-12:55

1 stop12h 25m

London Luton

Tue 17/3

07:00-18:20

1 stop16h 20m

£416

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 8/3

18:45-07:55

Nonstop8h 10m

London Heathrow

Tue 17/3

11:10-19:25

1 stop13h 15m

£461

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 18/4

19:15-16:00

1 stop14h 45m

London Heathrow

Tue 21/4

19:30-16:10

1 stop26h 40m

£461

Flights are sorted by cheapest return flights first.

Deals found on 29/12

Showing 1-10 of 60 results
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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 £296). Flying from Illinois in June will prove the most costly (average of £674). 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, Finnair, United Airlines. These airlines fly to the following popular destinations: London.

British Airways
British Airways
From £380
Iberia
Iberia
From £362
Aer Lingus
Aer Lingus
From £310
United Airlines
United Airlines
From £130

What is the cheapest place to fly to from Illinois?

The cheapest city to fly to from Illinois is Palm Beach Intl, with prices starting at £21. Explore other affordable destinations below.

Palm Beach Intl
Palm Beach Intl
From £21
Dallas/Fort Worth
Dallas/Fort Worth
From £29
New York
New York
From £38
Boston Logan Intl
Boston Logan Intl
From £40

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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 30 December 2025.

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

    Chicago O'Hare Intl airport offers the cheapest routes to Almaty, from £322; whereas Chicago Midway airport is typically cheaper if you're flying to London, from £471. 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 £322 round trip
    Travel from Chicago to Manchester from £337 round trip
    Travel from Chicago to Glasgow from £344 round trip
    Travel from Chicago to Edinburgh from £382 round trip
    Travel from Chicago to Almaty from £940 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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