What are the cheapest airlines to fly from Glasgow Intl Airport to Illinois one-way?

The cheapet airlines for a one-way flight from Glasgow Intl Airport to Illinois are Aer Lingus (£481), Icelandair (£515), and British Airways (£563).

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 £424, or £707 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 £562. You can even find prices in February for less than £562, as users have found deals to Illinois from as low as £354. 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 33%.

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.

£400+ Flights from Glasgow Intl Airport to Illinois

Cheap flight deals from Glasgow Intl to Illinois

Round-trip from	£400
Popular in	July
Cheapest in	February
Average price	£748

21/8-31/8
4 total stops
53h 50m total
Glasgow to Illinois

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£94 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 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 1 July 2025.

Thu 21/813:45GLA - ORD

2 stops32h 25mMultiple Airlines

Sun 31/818:00ORD - GLA

2 stops21h 25mMultiple Airlines

Deal found 29/6£400

Wed 1/1014:20GLA - ORD

1 stop12h 55mIcelandair

Wed 8/1019:25ORD - GLA

1 stop12h 00mIcelandair

Deal found 27/6£445

Tue 8/705:50GLA - ORD

1 stop12h 05mBritish Airways

Thu 11/922:35ORD - GLA

1 stop12h 55mBritish Airways

Deal found 30/6£459

Tue 26/808:55GLA - ORD

1 stop11h 15mDelta

Tue 9/913:25ORD - GLA

2 stops20h 45mDelta

Deal found 30/6£505

Wed 8/1006:00GLA - MDW

2 stops18h 36mDelta

Wed 22/1013:00MDW - GLA

2 stops13h 10mDelta

Deal found 29/6£509

Tue 7/1021:20GLA - ORD

1 stop20h 30mFinnair

Thu 23/1020:35ORD - GLA

1 stop11h 00mFinnair

Deal found 29/6£540

Mon 7/706:00GLA - ORD

1 stop14h 10mVirgin Atlantic

Thu 11/910:15ORD - GLA

2 stops15h 55mVirgin Atlantic

Deal found 29/6£561

Wed 9/706:00GLA - ORD

2 stops16h 33mKLM

Thu 11/916:20ORD - GLA

1 stop14h 40mKLM

Deal found 30/6£565

Wed 9/705:50GLA - ORD

2 stops16h 24mAmerican Airlines

Thu 11/913:59ORD - GLA

2 stops14h 16mAmerican Airlines

Deal found 30/6£567

Sun 5/1008:35GLA - MDW

1 stop13h 49mMultiple Airlines

Thu 23/1013:59MDW - GLA

2 stops17h 26mMultiple Airlines

Deal found 29/6£636

Thu 9/1006:10GLA - STL

2 stops39h 34mLufthansa

Mon 13/1012:25STL - GLA

2 stops28h 25mLufthansa

Deal found 30/6£804

Fri 7/1112:40GLA - MLI

2 stops33h 57mLufthansa

Tue 11/1110:50MLI - GLA

2 stops19h 10mLufthansa

Deal found 28/6£804

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 1 July 2025.

Thu 21/813:45GLA - ORD

2 stops32h 25mMultiple Airlines

Sun 31/818:00ORD - GLA

2 stops21h 25mMultiple Airlines

Deal found 29/6£400

Wed 1/1014:20GLA - ORD

1 stop12h 55mIcelandair

Wed 8/1019:25ORD - GLA

1 stop12h 00mIcelandair

Deal found 27/6£445

Wed 8/1005:50GLA - ORD

1 stop12h 00mBritish Airways

Wed 22/1022:35ORD - GLA

1 stop11h 00mBritish Airways

Deal found 29/6£486

Tue 26/808:55GLA - ORD

1 stop11h 15mDelta

Tue 9/913:25ORD - GLA

2 stops20h 45mDelta

Deal found 30/6£505

Tue 7/1021:20GLA - ORD

1 stop20h 30mFinnair

Wed 22/1022:35ORD - GLA

1 stop11h 00mFinnair

Deal found 29/6£540

Thu 9/1006:10GLA - STL

2 stops39h 34mLufthansa

Mon 13/1012:25STL - GLA

2 stops28h 25mLufthansa

Deal found 30/6£804

Thu 9/1006:00GLA - STL

2 stops16h 40mKLM

Mon 13/1016:27STL - GLA

2 stops14h 33mKLM

Deal found 29/6£812

Fri 7/1106:35GLA - MLI

2 stops21h 12mAmerican Airlines

Tue 11/1118:39MLI - GLA

2 stops13h 56mAmerican Airlines

Deal found 30/6£812

Wed 8/1006:00GLA - MDW

2 stops18h 36mDelta

Wed 22/1013:00MDW - GLA

2 stops13h 10mDelta

Deal found 29/6£509

Sun 5/1008:35GLA - MDW

1 stop13h 49mMultiple Airlines

Thu 23/1013:59MDW - GLA

2 stops17h 26mMultiple Airlines

Deal found 29/6£636

Fri 7/1112:40GLA - MLI

2 stops33h 57mLufthansa

Tue 11/1110:50MLI - GLA

2 stops19h 10mLufthansa

Deal found 28/6£804

Mon 28/706:00GLA - STL

2 stops17h 08mDelta

Mon 4/814:15STL - GLA

2 stops16h 45mDelta

Deal found 30/6£1,207

Last-minute flights from Glasgow Intl to Illinois
Discover last-minute flight deals from Glasgow Intl to Illinois. Data last updated 1 July 2025 and is based on user searches.

Mon 7/706:00GLA - ORD

1 stop14h 10mVirgin Atlantic

Thu 11/910:15ORD - GLA

2 stops15h 55mVirgin Atlantic

Deal found 29/6£561

Mon 7/706:00GLA - MDW

2 stops18h 40mDelta

Thu 11/913:08MDW - GLA

2 stops13h 02mDelta

Deal found 29/6£565

Mon 7/706:00GLA - ORD

1 stop14h 10mDelta

Wed 10/907:00ORD - GLA

2 stops19h 10mDelta

Deal found 29/6£561

Tue 8/705:50GLA - ORD

1 stop12h 05mBritish Airways

Thu 11/922:35ORD - GLA

1 stop12h 55mBritish Airways

Deal found 30/6£459

Tue 8/709:15GLA - ORD

2 stops19h 36mMultiple Airlines

Thu 11/922:35ORD - GLA

1 stop12h 55mMultiple Airlines

Deal found 30/6£524

Tue 8/706:00GLA - ORD

1 stop14h 10mDelta

Tue 9/910:15ORD - GLA

2 stops15h 55mDelta

Deal found 29/6£591

Tue 8/706:00GLA - ORD

2 stops15h 00mAir France

Fri 12/916:20ORD - GLA

1 stop24h 50mAir France

Deal found 30/6£618

Tue 8/713:10GLA - ORD

2 stops30h 50mLufthansa

Wed 10/921:40ORD - GLA

2 stops19h 25mLufthansa

Deal found 29/6£822

Tue 8/709:10GLA - MDW

2 stops15h 30mKLM

Wed 10/913:08MDW - GLA

2 stops13h 02mKLM

Deal found 29/6£850

Wed 9/706:00GLA - ORD

2 stops16h 33mKLM

Thu 11/916:20ORD - GLA

1 stop14h 40mKLM

Deal found 30/6£565

Wed 9/705:50GLA - ORD

2 stops16h 24mAmerican Airlines

Thu 11/913:59ORD - GLA

2 stops14h 16mAmerican Airlines

Deal found 30/6£567

Wed 23/714:20GLA - ORD

1 stop12h 55mIcelandair

Fri 1/819:25ORD - GLA

1 stop12h 00mIcelandair

Deal found 30/6£753

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 1 July 2025.

Sat 12/707:35GLA - ORD

3 stops55h 20mMultiple Airlines

Deal found 29/6£462

Wed 10/908:35GLA - ORD

1 stop11h 25mAer Lingus

Deal found 30/6£481

Sun 24/814:20GLA - ORD

1 stop9h 55mIcelandair

Deal found 30/6£515

Wed 10/905:50GLA - ORD

2 stops16h 07mBritish Airways

Deal found 29/6£563

Sat 12/707:35GLA - MDW

3 stops42h 06mMultiple Airlines

Deal found 29/6£580

Fri 5/906:00GLA - ORD

2 stops17h 37mDelta

Deal found 30/6£1,258

Fri 5/906:00GLA - MDW

2 stops17h 37mDelta

Deal found 30/6£1,258

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

Thu 21/8

13:45-16:10

2 stops32h 25m

Chicago O'Hare Intl

Sun 31/8

18:00-21:25

2 stops21h 25m

£400

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Wed 1/10

14:20-21:15

1 stop12h 55m

Chicago O'Hare Intl

Wed 8/10

19:25-13:25

1 stop12h 00m

£445

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Wed 8/10

05:50-11:50

1 stop12h 00m

Chicago O'Hare Intl

Wed 22/10

22:35-15:35

1 stop11h 00m

£486

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Tue 26/8

08:55-14:10

1 stop11h 15m

Chicago O'Hare Intl

Tue 9/9

13:25-16:10

2 stops20h 45m

£505

GlasgowChicago

GLA - MDW

GLAMDW

Glasgow Intl

Wed 8/10

06:00-18:36

2 stops18h 36m

Chicago Midway

Wed 22/10

13:00-08:10

2 stops13h 10m

£509

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Tue 7/10

21:20-11:50

1 stop20h 30m

Chicago O'Hare Intl

Thu 23/10

20:35-13:35

1 stop11h 00m

£540

GlasgowChicago

GLA - MDW

GLAMDW

Glasgow Intl

Sun 5/10

08:35-16:24

1 stop13h 49m

Chicago Midway

Thu 23/10

13:59-13:25

2 stops17h 26m

£636

GlasgowSt. Louis

GLA - STL

GLASTL

Glasgow Intl

Thu 9/10

06:10-15:44

2 stops39h 34m

Lambert-St Louis

Mon 13/10

12:25-22:50

2 stops28h 25m

£804

GlasgowMoline

GLA - MLI

GLAMLI

Glasgow Intl

Fri 7/11

12:40-16:37

2 stops33h 57m

Moline Quad-City

Tue 11/11

10:50-12:00

2 stops19h 10m

£804

GlasgowSt. Louis

GLA - STL

GLASTL

Glasgow Intl

Thu 9/10

06:00-14:16

2 stops14h 16m

Lambert-St Louis

Mon 13/10

17:45-16:10

2 stops16h 25m

£812

Flights are sorted by cheapest return flights first.

Deals found on 29/6

Showing 1-10 of 20 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 Delta, KLM, andFinnair 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.

Delta

8.0

Very Good

7,973 reviews

Check prices

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!

Delta

8.0

Very Good

7,973 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

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!

KLM

7.8

Good

1,366 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

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!

Finnair

7.6

Good

1,301 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

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!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

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!

Aer Lingus

7.1

Good

1,140 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

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!

Related info for your journey

What are the cheapest airlines to fly from Glasgow Intl Airport to Illinois one-way?
The cheapet airlines for a one-way flight from Glasgow Intl Airport to Illinois are Aer Lingus (£481), Icelandair (£515), and British Airways (£563).
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£320	Average£533	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Air France	Cheapest£330	Average£456	FlexibilityNo cancel fee	On-time77%	Search Air France flights
British Airways	Cheapest£371	Average£460	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Icelandair	Cheapest£413	Average£715	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
KLM	Cheapest£461	Average£498	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Virgin Atlantic	Cheapest£488	Average£528	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 £400

This is the cheapest retur 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.

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 1 July 2025.

Round-trip 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 1 July 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 1 July 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 1 July 2025.

Reviews of airlines servicing Illinois

See what other customers who have flown with Delta, KLM, andFinnair 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 cheapest airlines to fly from Glasgow Intl Airport to Illinois one-way?

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 1 July 2025.