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£86+ 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 2/5. 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
8 May — 15 May1
1 adult
1 adult, Economy, 0 bags

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 8 April 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

Sun 31/5

09:55-21:40

2 stops29h 45m

London Luton

Wed 10/6

06:15-21:25

2 stops21h 10m

£533

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Wed 6/5

21:00-15:25

1 stop12h 25m

London Luton

Wed 13/5

06:15-14:00

1 stop13h 45m

£575

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Mon 5/10

20:10-22:10

1 stop20h 00m

London Stansted

Mon 12/10

10:50-09:40

1 stop28h 50m

£586

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Sun 27/9

19:25-21:40

3 stops20h 15m

London Luton

Thu 1/10

08:30-18:15

2 stops15h 45m

£601

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 19/4

06:04-09:35

2 stops21h 31m

London Heathrow

Thu 7/5

21:05-16:10

2 stops25h 05m

£617

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 23/8

19:15-18:30

1 stop17h 15m

London Heathrow

Wed 2/9

06:40-22:06

2 stops21h 26m

£624

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 28/4

10:15-16:00

2 stops23h 45m

London Heathrow

Mon 18/5

19:50-21:36

2 stops31h 46m

£627

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Mon 5/10

19:25-22:05

2 stops20h 40m

London Luton

Mon 12/10

08:30-18:15

2 stops15h 45m

£628

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 18/8

21:40-11:55

Nonstop8h 15m

London Heathrow

Tue 25/8

06:50-12:00

1 stop11h 10m

£637

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 12/5

14:00-07:10

1 stop11h 10m

London Heathrow

Fri 22/5

06:30-14:15

1 stop13h 45m

£642

Flights are sorted by cheapest return flights first.

Deals found on 5/4

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 £291). Flying from Illinois in June will prove the most costly (average of £658). 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, Aer Lingus, Iberia, United Airlines, American Airlines. These airlines fly to the following popular destinations: London.

British Airways
British Airways
From £375
Aer Lingus
Aer Lingus
From £312
American Airlines
American Airlines
From £81
Etihad Airways
Etihad Airways
From £567

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 £35. Explore other affordable destinations below.

New York
New York
From £35
Minneapolis St Paul
Minneapolis St Paul
From £57
Tampa
Tampa
From £58
Los Angeles
Los Angeles
From £60

Browse thousands of different options on Cheapflights for your next trip

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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 8 April 2026.

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

    Chicago O'Hare Intl airport offers the cheapest routes to Almaty, from £451; whereas Chicago Midway airport is typically cheaper if you're flying to Edinburgh, from £586. 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 £451 round trip
    Travel from Chicago to Glasgow from £515 round trip
    Travel from Chicago to Edinburgh from £518 round trip
    Travel from Chicago to Manchester from £531 round trip
    Travel from Chicago to Almaty from £945 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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