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£91+ 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 21/8. 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
16 jul — 23 jul1
1 adult

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 11 julho 2025.

Good round-trip deal

£43 or less

Good one-way deal

£39 or less
Price to beat on a round-trip flight from Illinois.
Price to beat on a one-way flight from Illinois.

Find flights from Illinois

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 11 julho 2025.

ter 28/1019:30ORD - GLA
1 stop9h 25mIcelandair
qua 5/1112:35GLA - ORD
1 stop10h 45mIcelandair
Deal found 9/7£375
qui 4/919:15ORD - GLA
2 stops21h 05mMultiple Airlines
seg 15/914:20GLA - ORD
2 stops31h 50mMultiple Airlines
Deal found 10/7£401
dom 24/822:35ORD - GLA
1 stop12h 05mBritish Airways
qua 3/910:35GLA - ORD
1 stop12h 25mBritish Airways
Deal found 8/7£436
dom 12/1016:55ORD - LHR
Nonstop7h 55mBritish Airways
qua 22/1012:15LHR - ORD
Nonstop8h 35mBritish Airways
Deal found 11/7£457
qui 13/1119:05ORD - LCY
1 stop11h 45mSWISS
ter 18/1109:15LCY - ORD
1 stop13h 00mSWISS
Deal found 10/7£457
seg 28/719:25ORD - LGW
1 stop10h 20mIcelandair
sex 8/815:40LGW - ORD
1 stop11h 35mIcelandair
Deal found 11/7£457
seg 20/1017:45ORD - GLA
1 stop14h 55mAmerican Airlines
qua 5/1109:45GLA - ORD
2 stops16h 00mAmerican Airlines
Deal found 10/7£458
seg 22/919:15ORD - STN
1 stop15h 00mMultiple Airlines
seg 6/1008:00STN - ORD
1 stop14h 10mMultiple Airlines
Deal found 10/7£458
seg 21/719:25ORD - LHR
1 stop10h 30mIcelandair
sex 19/913:05LHR - ORD
1 stop11h 10mIcelandair
Deal found 10/7£459
ter 5/813:24ORD - LGW
2 stops12h 46mAmerican Airlines
ter 26/810:40LGW - ORD
2 stops18h 19mAmerican Airlines
Deal found 11/7£459
sáb 16/818:05ORD - LHR
Nonstop8h 15mUnited Airlines
sáb 23/814:10LHR - ORD
Nonstop9h 10mUnited Airlines
Deal found 10/7£460
qui 14/816:15ORD - LCY
1 stop10h 35mDelta
qui 21/807:45LCY - ORD
1 stop12h 25mDelta
Deal found 10/7£460

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

Fly to

Heathrow

Route

Depart

Return

Price

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

ter 28/10

19:30-09:55

1 stop9h 25m

Glasgow Intl

qua 5/11

12:35-17:20

1 stop10h 45m

£375

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

qui 4/9

19:15-22:20

2 stops21h 05m

Glasgow Intl

seg 15/9

14:20-16:10

2 stops31h 50m

£401

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

dom 24/8

22:35-16:40

1 stop12h 05m

Glasgow Intl

qua 3/9

10:35-17:00

1 stop12h 25m

£436

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

qui 13/11

19:05-12:50

1 stop11h 45m

London City

ter 18/11

09:15-16:15

1 stop13h 00m

£457

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

dom 12/10

16:55-06:50

Nonstop7h 55m

London Heathrow

qua 22/10

12:15-14:50

Nonstop8h 35m

£457

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

seg 28/7

19:25-11:45

1 stop10h 20m

London Gatwick

sex 8/8

15:40-21:15

1 stop11h 35m

£457

ChicagoGlasgow

ORD - GLA

ORDGLA

Chicago O'Hare Intl

seg 20/10

17:45-14:40

1 stop14h 55m

Glasgow Intl

qua 5/11

09:45-19:45

2 stops16h 00m

£458

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

seg 22/9

19:15-16:15

1 stop15h 00m

London Stansted

seg 6/10

08:00-16:10

1 stop14h 10m

£458

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

ter 5/8

13:24-08:10

2 stops12h 46m

London Gatwick

ter 26/8

10:40-22:59

2 stops18h 19m

£459

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

sáb 16/8

18:05-08:20

Nonstop8h 15m

London Heathrow

sáb 23/8

14:10-17:20

Nonstop9h 10m

£460

Flights are sorted by cheapest return flights first.

Deals found on 10/7

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 £288). Flying from Illinois in June will prove the most costly (average of £641). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

Airline reviews for flights from Illinois

Get insights into the airlines that provide service from Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing airline for your flight from Illinois. In the last 7 days, Cheapflights users made a total of 858,174 searches.
Check out reviews from past customers who have flown Delta, KLM, andAustrian Airlines from Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very Good

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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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 11 julho 2025.
  • What is the cheapest airport to fly out of Illinois?

    Chicago O'Hare Intl airport offers the cheapest routes to Almaty, from £314; whereas Chicago Midway airport is typically cheaper if you're flying to London, from £392. 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 £314 round trip
    Travel from Chicago to Glasgow from £375 round trip
    Travel from Chicago to Edinburgh from £381 round trip
    Travel from Chicago to Almaty from £934 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.

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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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