In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What are the most popular routes from Glasgow Intl Airport to Illinois?

The most popular flight routes from Glasgow Intl Airport to Illinois are Glasgow Intl - Chicago O'Hare Intl, Glasgow Intl - Chicago Midway and Glasgow Intl - Lambert-St Louis.

What are the most popular airlines that fly from Glasgow Intl Airport to Illinois?

When booking a flight from Glasgow Intl Airport to Illinois, you may want to consider flying on Air France, British Airways or Aer Lingus as they are the most popular for this route.

How far in advance should I book a flight from Glasgow Intl Airport to Illinois?

Travelers have found it’s best to book a flight 51 days in advance to save up to 117% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 51 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Glasgow Intl Airport to Illinois 1-2 weeks in advance for as low as £479, or £715 for flights within the next 24 hours.

What is the cheapest month to fly from Glasgow Intl Airport to Illinois?

The best pricing can be found in the month of February. Prices to Illinois from Glasgow Intl Airport average £561. You can even find prices in February for less than £561, as users have found deals to Illinois from as low as £358. The month of July appears to be one of the more expensive times to travel to Illinois from Glasgow Intl Airport. Flying in the targeted month can save you up to 26%.

Can I find deals for flights from Glasgow Intl to Illinois that include hotel bookings?

Yes. In addition to deals on Glasgow Intl to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Glasgow Intl to Illinois?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Glasgow Intl to Illinois.

Can I find deals for business class flights from Glasgow Intl to Illinois?

Yes. Cheapflights offers flight deals from Glasgow Intl to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£295+ Flights from Glasgow Intl Airport to Illinois

Cheap flight deals from Glasgow Intl to Illinois

Round-trip from	£452
One-way from	£295
Popular in	July
Cheapest in	February
Average price	£638

Icelandair
24/9-29/9
2 total stops
21h 55m total
Glasgow to Illinois

Search Deals

12/9
2 total stops
41h 58m total
Glasgow to Illinois

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£68 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Glasgow Intl to Illinois

Cheapest flights from Glasgow Intl to Illinois
Explore the most affordable flight options available from Glasgow Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.

Wed 24/914:20GLA - ORD

1 stop9h 55mIcelandair

Mon 29/919:25ORD - GLA

1 stop12h 00mIcelandair

Deal found 14/8£452

Wed 24/908:35GLA - ORD

1 stop14h 58mMultiple Airlines

Mon 29/908:40ORD - GLA

2 stops16h 10mMultiple Airlines

Deal found 14/8£498

Tue 26/808:55GLA - ORD

1 stop11h 15mKLM

Tue 9/916:15ORD - GLA

1 stop24h 55mKLM

Deal found 13/8£503

Tue 26/808:55GLA - ORD

1 stop11h 15mDelta

Tue 9/907:00ORD - GLA

2 stops19h 10mDelta

Deal found 14/8£506

Mon 1/908:25GLA - ORD

1 stop12h 15mBritish Airways

Sat 4/1017:40ORD - GLA

1 stop11h 35mBritish Airways

Deal found 14/8£522

Tue 28/1012:35GLA - ORD

1 stop10h 45mIcelandair

Sat 1/1119:30ORD - GLA

1 stop9h 25mIcelandair

Deal found 13/8£529

Mon 1/916:55GLA - ORD

1 stop27h 15mKLM

Sat 4/1013:00ORD - GLA

2 stops14h 45mKLM

Deal found 13/8£532

Wed 24/906:00GLA - MDW

2 stops17h 35mKLM

Mon 29/913:08MDW - GLA

2 stops13h 02mKLM

Deal found 14/8£533

Sat 27/908:35GLA - ORD

1 stop11h 25mAer Lingus

Sun 5/1015:45ORD - GLA

1 stop13h 45mAer Lingus

Deal found 13/8£535

Thu 18/906:00GLA - MDW

2 stops18h 35mDelta

Thu 2/1018:15MDW - GLA

2 stops15h 55mDelta

Deal found 15/8£540

Thu 18/908:35GLA - MDW

1 stop13h 49mMultiple Airlines

Thu 2/1009:35MDW - GLA

1 stop15h 15mMultiple Airlines

Deal found 15/8£666

Sun 28/916:55GLA - MDW

2 stops31h 40mKLM

Sun 5/1013:08MDW - GLA

2 stops13h 02mKLM

Deal found 14/8£683

Best flights from Glasgow Intl to Illinois
Discover carefully curated flight deals from Glasgow Intl to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 August 2025.

Wed 24/914:20GLA - ORD

1 stop9h 55mIcelandair

Mon 29/919:25ORD - GLA

1 stop12h 00mIcelandair

Deal found 14/8£452

Thu 18/918:40GLA - ORD

2 stops27h 50mMultiple Airlines

Thu 2/1011:13ORD - GLA

2 stops20h 12mMultiple Airlines

Deal found 15/8£485

Tue 26/808:55GLA - ORD

1 stop11h 15mKLM

Tue 9/916:15ORD - GLA

1 stop24h 55mKLM

Deal found 13/8£503

Tue 26/808:55GLA - ORD

1 stop11h 15mDelta

Tue 9/907:00ORD - GLA

2 stops19h 10mDelta

Deal found 14/8£506

Mon 1/908:25GLA - ORD

1 stop12h 15mBritish Airways

Sat 4/1017:40ORD - GLA

1 stop11h 35mBritish Airways

Deal found 14/8£522

Fri 26/906:00GLA - MDW

2 stops21h 36mAir France

Fri 3/1018:15MDW - GLA

2 stops15h 55mAir France

Deal found 12/8£602

Fri 7/1110:40GLA - MLI

2 stops19h 00mAmerican Airlines

Tue 11/1117:22MLI - GLA

2 stops18h 53mAmerican Airlines

Deal found 12/8£808

Sat 31/112:35GLA - ORD

1 stop10h 45mIcelandair

Sat 14/319:30ORD - GLA

1 stop9h 25mIcelandair

Deal found 13/8£472

Wed 24/908:35GLA - ORD

1 stop14h 58mMultiple Airlines

Mon 29/908:40ORD - GLA

2 stops16h 10mMultiple Airlines

Deal found 14/8£498

Thu 9/1013:10GLA - STL

1 stop30h 20mLufthansa

Mon 13/1012:25STL - GLA

2 stops17h 55mLufthansa

Deal found 13/8£1,054

Wed 24/906:00GLA - MDW

2 stops17h 35mKLM

Mon 29/913:08MDW - GLA

2 stops13h 02mKLM

Deal found 14/8£533

Sun 31/806:00GLA - MDW

2 stops17h 37mDelta

Tue 30/913:08MDW - GLA

2 stops13h 02mDelta

Deal found 12/8£535

Last-minute flights from Glasgow Intl to Illinois
Discover last-minute flight deals from Glasgow Intl to Illinois. Data last updated 15 August 2025 and is based on user searches.

Sat 23/806:00GLA - MDW

2 stops18h 37mDelta

Thu 28/818:17MDW - GLA

2 stops15h 53mDelta

Deal found 11/8£780

Sun 24/814:20GLA - MDW

2 stops16h 00mMultiple Airlines

Fri 29/815:20MDW - GLA

2 stops16h 05mMultiple Airlines

Deal found 11/8£1,153

Sun 24/814:20GLA - MDW

2 stops16h 00mMultiple Airlines

Thu 28/815:20MDW - GLA

2 stops16h 05mMultiple Airlines

Deal found 11/8£1,191

Tue 26/808:55GLA - ORD

1 stop11h 15mKLM

Tue 9/916:15ORD - GLA

1 stop24h 55mKLM

Deal found 13/8£503

Tue 26/808:55GLA - ORD

1 stop11h 15mDelta

Tue 9/907:00ORD - GLA

2 stops19h 10mDelta

Deal found 14/8£506

Mon 1/908:25GLA - ORD

1 stop12h 15mBritish Airways

Sat 4/1017:40ORD - GLA

1 stop11h 35mBritish Airways

Deal found 14/8£522

Mon 1/916:55GLA - ORD

1 stop27h 15mKLM

Sat 4/1013:00ORD - GLA

2 stops14h 45mKLM

Deal found 13/8£532

Mon 1/908:55GLA - ORD

2 stops17h 28mDelta

Sat 4/1010:40ORD - GLA

2 stops17h 05mDelta

Deal found 14/8£546

Thu 18/906:00GLA - MDW

2 stops18h 35mDelta

Thu 2/1018:15MDW - GLA

2 stops15h 55mDelta

Deal found 15/8£540

Thu 18/908:35GLA - MDW

1 stop13h 49mMultiple Airlines

Thu 2/1009:35MDW - GLA

1 stop15h 15mMultiple Airlines

Deal found 15/8£666

Wed 24/914:20GLA - ORD

1 stop9h 55mIcelandair

Mon 29/919:25ORD - GLA

1 stop12h 00mIcelandair

Deal found 14/8£452

Wed 24/908:35GLA - ORD

1 stop14h 58mMultiple Airlines

Mon 29/908:40ORD - GLA

2 stops16h 10mMultiple Airlines

Deal found 14/8£498

One-way flights from Glasgow Intl to Illinois
Search for one-way flight options from Glasgow Intl to Illinois. Find affordable one-way fares based on user searches. Data last updated 15 August 2025.

Fri 12/921:20GLA - MDW

2 stops41h 58mMultiple Airlines

Deal found 12/8£295

Sat 27/915:35GLA - MDW

3 stops45h 48mMultiple Airlines

Deal found 11/8£359

Sun 28/921:20GLA - STL

3 stops41h 46mMultiple Airlines

Deal found 14/8£370

Wed 20/810:05GLA - ORD

1 stop35h 47mMultiple Airlines

Deal found 13/8£377

Sun 30/1120:10GLA - ORD

2 stops27h 10mMultiple Airlines

Deal found 14/8£392

Sat 29/1122:30GLA - ORD

3 stops45h 05mMultiple Airlines

Deal found 14/8£430

Wed 20/808:25GLA - MDW

3 stops38h 40mMultiple Airlines

Deal found 13/8£462

Tue 2/1208:20GLA - ORD

1 stop11h 40mAer Lingus

Deal found 14/8£477

Sun 14/913:50GLA - ORD

1 stop11h 10mAer Lingus

Deal found 13/8£521

Tue 28/1008:20GLA - ORD

1 stop11h 40mAer Lingus

Deal found 13/8£529

Mon 27/1008:20GLA - ORD

1 stop11h 40mAer Lingus

Deal found 13/8£543

Sun 28/906:10GLA - STL

1 stop13h 20mLufthansa

Deal found 14/8£791

Cheapflights Fare Finder

Use the filters below to find and compare flights from Glasgow Intl Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Wed 24/9

14:20-18:15

1 stop9h 55m

Chicago O'Hare Intl

Mon 29/9

19:25-13:25

1 stop12h 00m

£452

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Sat 31/1

12:35-17:20

1 stop10h 45m

Chicago O'Hare Intl

Sat 14/3

19:30-09:55

1 stop9h 25m

£472

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Thu 18/9

18:40-16:30

2 stops27h 50m

Chicago O'Hare Intl

Thu 2/10

11:13-13:25

2 stops20h 12m

£485

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Wed 24/9

08:35-17:33

1 stop14h 58m

Chicago O'Hare Intl

Mon 29/9

08:40-06:50

2 stops16h 10m

£498

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Tue 26/8

08:55-14:10

1 stop11h 15m

Chicago O'Hare Intl

Tue 9/9

16:15-23:10

1 stop24h 55m

£503

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Tue 26/8

08:55-14:10

1 stop11h 15m

Chicago O'Hare Intl

Tue 9/9

07:00-08:10

2 stops19h 10m

£506

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Mon 1/9

08:25-14:40

1 stop12h 15m

Chicago O'Hare Intl

Sat 4/10

17:40-11:15

1 stop11h 35m

£522

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Fri 12/9

14:20-21:15

1 stop12h 55m

Chicago O'Hare Intl

Fri 19/9

22:15-13:25

1 stop9h 10m

£524

GlasgowChicago

GLA - MDW

GLAMDW

Glasgow Intl

Wed 24/9

06:00-17:35

2 stops17h 35m

Chicago Midway

Mon 29/9

13:08-08:10

2 stops13h 02m

£533

GlasgowChicago

GLA - MDW

GLAMDW

Glasgow Intl

Sun 31/8

06:00-17:37

2 stops17h 37m

Chicago Midway

Tue 30/9

13:08-08:10

2 stops13h 02m

£535

Flights are sorted by cheapest return flights first.

Deals found on 12/8

Showing 1-10 of 40 results

Best time to book a flight from Glasgow Intl to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Glasgow Intl 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.

Cheapflights Insights

Everything you need to know about your flight from Glasgow Intl Airport to Illinois

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

Currently, January is the cheapest month in which you can book a flight from Glasgow Intl Airport to Illinois (average of £595). Flying from Glasgow Intl Airport to Illinois in July is currently the most expensive (average of £843). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from GLA to IL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Glasgow Intl Airport to Illinois as you normally would.

Reviews of airlines servicing Illinois

See what other customers who have flown with KLM, Virgin Atlantic, andAer Lingus from Glasgow Intl Airport to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

KLM

7.8

Good

1,384 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

KLM

7.8

Good

1,384 reviews

KLM

7.8

Good

1,384 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Virgin Atlantic

7.4

Good

657 reviews

KLM

7.8

Good

1,384 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Aer Lingus

7.1

Good

1,214 reviews

KLM

7.8

Good

1,384 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Icelandair

7.0

Good

526 reviews

KLM

7.8

Good

1,384 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

British Airways

6.7

Okay

7,267 reviews

KLM

7.8

Good

1,384 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

What are the most popular routes from Glasgow Intl Airport to Illinois?
The most popular flight routes from Glasgow Intl Airport to Illinois are Glasgow Intl - Chicago O'Hare Intl, Glasgow Intl - Chicago Midway and Glasgow Intl - Lambert-St Louis.
Can I find deals for flights from Glasgow Intl to Illinois that include hotel bookings?
Yes. In addition to deals on Glasgow Intl to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Glasgow Intl to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Glasgow Intl to Illinois.
Can I find deals for business class flights from Glasgow Intl to Illinois?
Yes. Cheapflights offers flight deals from Glasgow Intl to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Glasgow Intl Airport to Illinois?
Currently, January is the cheapest month in which you can book a flight from Glasgow Intl Airport to Illinois (average of £595). Flying from Glasgow Intl Airport to Illinois in July is currently the most expensive (average of £843). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

Illinois car hire

Chicago O'Hare Intl Airport car hire

Chicago Midway Airport car hire

Moline Quad-City Airport car hire

Greater Peoria Airport car hire

Bloomington-Normal Airport car hire

Springfield Capital Airport car hire

Champaign University-Willard Airport car hire

Chicago Greater Rockford Airport car hire

Belleville Airport car hire

Marion Williamson County Airport car hire

Quincy Regional Airport car hire

Direct flights to United States

Top 6 airlines flying from Glasgow Intl to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Aer Lingus	Cheapest£324	Average£530	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Air France	Cheapest£334	Average£461	FlexibilityNo cancel fee	On-time77%	Search Air France flights
British Airways	Cheapest£375	Average£464	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Icelandair	Cheapest£417	Average£722	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
KLM	Cheapest£467	Average£503	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Virgin Atlantic	Cheapest£493	Average£539	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights

Fly with Cheapflights

How does Cheapflights help users find flights from Glasgow Intl to Illinois?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Glasgow Intl to Illinois. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights simply makes it quick and affordable to book flights from Glasgow Intl to Illinois by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Glasgow Intl to Illinois with no change fees?

Certainly. Search results for flights to Illinois from Glasgow Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Of course! You can now track prices for flights from Glasgow Intl to Illinois and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from Glasgow Intl Airport to Illinois from £295

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Glasgow Intl to Illinois

Keep the following information in mind while searching for Glasgow Intl to Illinois flight deals. Data was last updated 15 August 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Glasgow Intl to Illinois

Cheapest flights from Glasgow Intl to IllinoisExplore the most affordable flight options available from Glasgow Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.

Explore the most affordable flight options available from Glasgow Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Glasgow Intl Airport to Illinois that are best for you.

Best time to book a flight from Glasgow Intl to Illinois

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

Cheapflights Insights

Everything you need to know about your flight from Glasgow Intl Airport to Illinois

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

What is the cheapest time of day to fly from GLA to IL?

Find hourly flight availability from Glasgow Intl to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 August 2025.

Reviews of airlines servicing Illinois

See what other customers who have flown with KLM, Virgin Atlantic, andAer Lingus from Glasgow Intl Airport to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Glasgow Intl to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the most popular routes from Glasgow Intl Airport to Illinois?

Can I find deals for flights from Glasgow Intl to Illinois that include hotel bookings?

How can I find direct flights from Glasgow Intl to Illinois?

Can I find deals for business class flights from Glasgow Intl to Illinois?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Glasgow Intl to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Glasgow Intl to Illinois

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Glasgow Intl to Illinois?

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

Can Cheapflights find flights from Glasgow Intl to Illinois with no change fees?

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

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Cheapest flights from Glasgow Intl to Illinois
Explore the most affordable flight options available from Glasgow Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.