What are the cheapest airlines flying from Glasgow to Chicago round-trip?

Cheapflights users have booked flights from Glasgow to Chicago round-trip from £439. Other airlines that can offer you cheap pricing are British Airways, from £475, and KLM, from £489. Icelandair is 26% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from Glasgow to Chicago one-way?

The cheapet airlines for a one-way flight from Glasgow to Chicago are Icelandair (£406), Aer Lingus (£528), and British Airways (£788).

What is the cheapest day to fly from Glasgow to Chicago?

Travellers seeking maximum savings on their Glasgow to Chicago flight should consider departing on Wednesday at midday when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular airlines that fly from Glasgow to Chicago?

Consider Air France, British Airways or Aer Lingus when booking your flight. These represent the most popular airlines when flying from Glasgow to Chicago.

What is the cheapest day to fly round-trip from Glasgow to Chicago?

Travelers have found that booking a Tuesday departure is the best way to save up to 19% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

How far in advance should I book a flight from Glasgow to Chicago?

Users have found that booking a flight from Glasgow to Chicago at least 51 days early can save you up to 117% on average compared to booking a flight this week. If booking 51 days before your flight isn’t an option for you, users have found flights from Glasgow to Chicago for as little as £397 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £751 for flights departing within the next 3 days.

What is the cheapest month to fly from Glasgow to Chicago?

February is one of the best times of the year to fly to Chicago from Glasgow. Prices for February average £599 per person but you can even find prices for as low as £375. The most expensive prices can be found in the month of July. Opting for a February flight can save you 33% on your journey compared to booking in July

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

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

How can I find direct flights from Glasgow to Chicago?

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

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

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

£254+ Flights from Glasgow to Chicago

Cheapflights Tip: The best prices from Glasgow to Chicago are usually found in February or November, booked 50 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from Glasgow to Chicago

Round-trip from	£439
One-way from	£254
Popular in	July
Cheapest in	February
Average price	£601

Icelandair
3/5-13/5
2 total stops
21h 50m total
Glasgow to Chicago

Search Deals

20/5
2 total stops
39h 09m total
Glasgow to Chicago

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£99 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Find flight deals from Glasgow to Chicago

Cheapest flights from Glasgow to Chicago
Explore the most affordable flight options available from Glasgow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 April 2025.

Sat 3/514:25GLA - ORD

1 stop9h 50mIcelandair

Tue 13/519:25ORD - GLA

1 stop12h 00mIcelandair

Deal found 1/4£439

Thu 1/511:30GLA - ORD

1 stop12h 45mBritish Airways

Thu 8/517:40ORD - GLA

1 stop10h 35mBritish Airways

Deal found 1/4£475

Fri 16/507:00GLA - ORD

1 stop13h 40mMultiple Airlines

Fri 23/519:15ORD - GLA

1 stop10h 55mMultiple Airlines

Deal found 1/4£479

Thu 1/506:00GLA - ORD

2 stops15h 29mKLM

Thu 8/516:20ORD - GLA

1 stop24h 50mKLM

Deal found 1/4£489

Fri 16/507:00GLA - ORD

1 stop12h 50mIberia

Fri 23/516:40ORD - GLA

2 stops13h 30mIberia

Deal found 1/4£503

Thu 24/406:00GLA - MDW

2 stops18h 20mVirgin Atlantic

Thu 8/513:08MDW - GLA

2 stops13h 02mVirgin Atlantic

Deal found 1/4£517

Thu 1/506:00GLA - MDW

2 stops14h 22mKLM

Thu 8/513:08MDW - GLA

2 stops13h 02mKLM

Deal found 1/4£564

Tue 26/806:00GLA - ORD

2 stops18h 40mDelta

Tue 9/910:10ORD - GLA

2 stops16h 00mDelta

Deal found 1/4£565

Thu 24/406:10GLA - ORD

2 stops18h 05mLufthansa

Thu 8/521:40ORD - GLA

2 stops19h 25mLufthansa

Deal found 2/4£568

Wed 25/605:50GLA - ORD

1 stop14h 00mAmerican Airlines

Thu 3/719:10ORD - GLA

1 stop12h 25mAmerican Airlines

Deal found 1/4£621

Thu 1/506:00GLA - MDW

2 stops17h 19mDelta

Thu 15/509:16MDW - GLA

2 stops16h 54mDelta

Deal found 1/4£623

Fri 27/606:00GLA - ORD

2 stops32h 25mVirgin Atlantic

Sat 5/714:00ORD - GLA

2 stops36h 25mVirgin Atlantic

Deal found 1/4£656

Best flights from Glasgow to Chicago
Discover carefully curated flight deals from Glasgow to Chicago that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 April 2025.

Sat 3/514:25GLA - ORD

1 stop9h 50mIcelandair

Tue 13/519:25ORD - GLA

1 stop12h 00mIcelandair

Deal found 1/4£439

Thu 1/507:00GLA - ORD

1 stop12h 55mBritish Airways

Thu 15/521:15ORD - GLA

1 stop12h 50mBritish Airways

Deal found 1/4£475

Fri 16/507:00GLA - ORD

1 stop13h 40mMultiple Airlines

Fri 23/519:15ORD - GLA

1 stop10h 55mMultiple Airlines

Deal found 1/4£479

Thu 1/506:00GLA - ORD

2 stops15h 29mKLM

Thu 8/516:20ORD - GLA

1 stop24h 50mKLM

Deal found 1/4£489

Fri 16/507:00GLA - ORD

1 stop12h 50mIberia

Fri 23/516:40ORD - GLA

2 stops13h 30mIberia

Deal found 1/4£503

Thu 24/406:00GLA - MDW

2 stops18h 20mVirgin Atlantic

Thu 8/513:08MDW - GLA

2 stops13h 02mVirgin Atlantic

Deal found 1/4£517

Tue 26/806:00GLA - ORD

2 stops18h 40mDelta

Tue 9/910:10ORD - GLA

2 stops16h 00mDelta

Deal found 1/4£565

Thu 24/406:10GLA - ORD

2 stops18h 05mLufthansa

Thu 8/521:40ORD - GLA

2 stops19h 25mLufthansa

Deal found 2/4£568

Wed 25/605:50GLA - ORD

1 stop14h 00mAmerican Airlines

Thu 3/719:10ORD - GLA

1 stop12h 25mAmerican Airlines

Deal found 1/4£621

Fri 27/613:05GLA - ORD

1 stop11h 55mAer Lingus

Sun 6/715:45ORD - GLA

1 stop11h 35mAer Lingus

Deal found 1/4£858

Thu 1/506:00GLA - MDW

2 stops14h 22mKLM

Thu 8/513:08MDW - GLA

2 stops13h 02mKLM

Deal found 1/4£564

Thu 1/506:00GLA - MDW

2 stops17h 19mDelta

Thu 15/509:16MDW - GLA

2 stops16h 54mDelta

Deal found 1/4£623

Last-minute flights from Glasgow to Chicago
Discover last-minute flight deals from Glasgow to Chicago. Data last updated 2 April 2025 and is based on user searches.

Thu 24/406:00GLA - MDW

2 stops18h 20mVirgin Atlantic

Thu 8/513:08MDW - GLA

2 stops13h 02mVirgin Atlantic

Deal found 1/4£517

Thu 24/406:10GLA - ORD

2 stops18h 05mLufthansa

Thu 8/521:40ORD - GLA

2 stops19h 25mLufthansa

Deal found 2/4£568

Thu 24/406:00GLA - ORD

2 stops16h 08mDelta

Thu 8/507:00ORD - GLA

2 stops19h 10mDelta

Deal found 1/4£580

Thu 1/507:00GLA - ORD

1 stop12h 55mBritish Airways

Thu 15/521:15ORD - GLA

1 stop12h 50mBritish Airways

Deal found 1/4£475

Thu 1/506:00GLA - ORD

2 stops15h 29mKLM

Thu 8/516:20ORD - GLA

1 stop24h 50mKLM

Deal found 1/4£489

Thu 1/506:00GLA - MDW

2 stops14h 22mKLM

Thu 8/513:08MDW - GLA

2 stops13h 02mKLM

Deal found 1/4£564

Thu 1/506:00GLA - MDW

2 stops17h 19mDelta

Thu 15/509:16MDW - GLA

2 stops16h 54mDelta

Deal found 1/4£623

Fri 2/513:30GLA - ORD

1 stop30h 40mAir France

Sun 18/517:10ORD - GLA

2 stops17h 00mAir France

Deal found 31/3£1,510

Fri 2/514:20GLA - MDW

2 stops24h 25mMultiple Airlines

Sun 18/509:40MDW - GLA

2 stops21h 45mMultiple Airlines

Deal found 31/3£2,533

Sat 3/514:25GLA - ORD

1 stop9h 50mIcelandair

Tue 13/519:25ORD - GLA

1 stop12h 00mIcelandair

Deal found 1/4£439

Fri 16/507:00GLA - ORD

1 stop13h 40mMultiple Airlines

Fri 23/519:15ORD - GLA

1 stop10h 55mMultiple Airlines

Deal found 1/4£479

Fri 16/507:00GLA - ORD

1 stop12h 50mIberia

Fri 23/516:40ORD - GLA

2 stops13h 30mIberia

Deal found 1/4£503

One-way flights from Glasgow to Chicago
Search for one-way flight options from Glasgow to Chicago. Find affordable one-way fares based on user searches. Data last updated 2 April 2025.

Tue 20/507:35GLA - ORD

2 stops39h 09mMultiple Airlines

Deal found 1/4£254

Thu 24/410:15GLA - MDW

2 stops32h 16mMultiple Airlines

Deal found 1/4£272

Sat 26/414:20GLA - ORD

1 stop9h 55mIcelandair

Deal found 31/3£406

Tue 3/620:10GLA - ORD

2 stops28h 05mAer Lingus

Deal found 1/4£528

Wed 16/407:00GLA - ORD

2 stops16h 50mBritish Airways

Deal found 2/4£788

Tue 3/613:10GLA - ORD

1 stop12h 45mLufthansa

Deal found 1/4£2,392

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Sat 3/5

14:25-18:15

1 stop9h 50m

Chicago O'Hare Intl

Tue 13/5

19:25-13:25

1 stop12h 00m

£439

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Thu 1/5

11:30-18:15

1 stop12h 45m

Chicago O'Hare Intl

Thu 8/5

17:40-10:15

1 stop10h 35m

£475

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Fri 16/5

07:00-14:40

1 stop13h 40m

Chicago O'Hare Intl

Fri 23/5

19:15-12:10

1 stop10h 55m

£479

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Thu 1/5

06:00-15:29

2 stops15h 29m

Chicago O'Hare Intl

Thu 8/5

16:20-23:10

1 stop24h 50m

£489

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Fri 16/5

07:00-13:50

1 stop12h 50m

Chicago O'Hare Intl

Fri 23/5

16:40-12:10

2 stops13h 30m

£503

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Thu 24/4

06:00-20:45

2 stops20h 45m

Chicago O'Hare Intl

Thu 8/5

16:20-23:10

1 stop24h 50m

£507

GlasgowChicago

GLA - MDW

GLAMDW

Glasgow Intl

Thu 24/4

06:00-18:20

2 stops18h 20m

Chicago Midway

Thu 8/5

13:08-08:10

2 stops13h 02m

£517

GlasgowChicago

GLA - MDW

GLAMDW

Glasgow Intl

Thu 1/5

06:00-14:22

2 stops14h 22m

Chicago Midway

Thu 8/5

13:08-08:10

2 stops13h 02m

£564

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Tue 26/8

06:00-18:40

2 stops18h 40m

Chicago O'Hare Intl

Tue 9/9

10:10-08:10

2 stops16h 00m

£565

GlasgowChicago

GLA - ORD

GLAORD

Glasgow Intl

Thu 24/4

06:10-18:15

2 stops18h 05m

Chicago O'Hare Intl

Thu 8/5

21:40-23:05

2 stops19h 25m

£568

Flights are sorted by cheapest return flights first.

Deals found on 1/4

Showing 1-10 of 22 results

Best time to book a flight from Glasgow to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Glasgow 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 to Chicago

How far ahead should I book a flight from Glasgow to Chicago?

The best time to book flights from Glasgow to Chicago is 50 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Glasgow to Chicago?

Currently, January is the cheapest month in which you can book a flight from Glasgow to Chicago (average of £595). Flying from Glasgow to Chicago 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 CHI?

When flying from Glasgow to Chicago, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 15% versus a flight in the evening.

Rainfall in Chicago by month

In terms of precipitation, rainfall in Chicago 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 Chicago when rainfall is around 43.0 mm.

Temperature in Chicago by month

If weather is an important factor for your trip to Chicago, 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).

Reviews of airlines servicing Chicago

To help decide which airline to fly from Glasgow to Chicago, see what other customers have to say about Delta, KLM and Air France. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,898 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

7,898 reviews

Delta

8.0

Very Good

7,898 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,323 reviews

Delta

8.0

Very Good

7,898 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France

7.4

Good

1,427 reviews

Delta

8.0

Very Good

7,898 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic

7.4

Good

637 reviews

Delta

8.0

Very Good

7,898 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very Good

7,898 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What are the cheapest airlines flying from Glasgow to Chicago round-trip?
Cheapflights users have booked flights from Glasgow to Chicago round-trip from £439. Other airlines that can offer you cheap pricing are British Airways, from £475, and KLM, from £489. Icelandair is 26% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Glasgow to Chicago one-way?
The cheapet airlines for a one-way flight from Glasgow to Chicago are Icelandair (£406), Aer Lingus (£528), and British Airways (£788).
Can I find deals for flights from Glasgow to Chicago that include hotel bookings?
Yes. In addition to deals on Glasgow to Chicago flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Glasgow to Chicago?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Glasgow to Chicago.
Can I find deals for business class flights from Glasgow to Chicago?
Yes. Cheapflights offers flight deals from Glasgow to Chicago 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 to Chicago?
Currently, January is the cheapest month in which you can book a flight from Glasgow to Chicago (average of £595). Flying from Glasgow to Chicago 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

Alternative routes for Glasgow to Chicago

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Top 10 airlines flying from Glasgow to Chicago

Airline	Cheapest	Average	Flexibility	On-time
Aer Lingus	Cheapest£340	Average£611	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Air France	Cheapest£350	Average£484	FlexibilityNo cancel fee	On-time77%	Search Air France flights
British Airways	Cheapest£393	Average£535	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Icelandair	Cheapest£426	Average£747	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
KLM	Cheapest£477	Average£590	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Finnair	Cheapest£495	Average£572	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Virgin Atlantic	Cheapest£518	Average£560	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
United Airlines	Cheapest£535	Average£672	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	Cheapest£544	Average£653	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Lufthansa	Cheapest£558	Average£727	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights

Fly with Cheapflights

How does Cheapflights help users find flights from Glasgow to Chicago?

Cheapflights makes it easy to find Glasgow to Chicago flights 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 Glasgow to Chicago?

Cheapflights helps you find that perfect flight to Chicago from Glasgow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes, we can. To see specific flights from Glasgow to Chicago with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, Cheapflights offers price alerts on Glasgow to Chicago flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from Glasgow to Chicago from £254

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Glasgow to Chicago are usually found in February or November, booked 50 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from Glasgow to Chicago

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Glasgow to Chicago

Cheapest flights from Glasgow to ChicagoExplore the most affordable flight options available from Glasgow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 April 2025.

Explore the most affordable flight options available from Glasgow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 April 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Glasgow to Chicago

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

Cheapflights Insights

Everything you need to know about your flight from Glasgow to Chicago

How far ahead should I book a flight from Glasgow to Chicago?

Use this chart to determine the optimal time to book a return flight from Glasgow to Chicago. Price data was last updated on 28 March 2025.

What is the cheapest month to book a flight from Glasgow to Chicago?

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

Find hourly flight availability from Glasgow to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 April 2025.

Rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average rainfall totals by month.

Temperature in Chicago by month

Plan your trip to Chicago by taking into account the average temperature totals by month.

Reviews of airlines servicing Chicago

To help decide which airline to fly from Glasgow to Chicago, see what other customers have to say about Delta, KLM and Air France. You can also see how each airline stacks up 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 to Chicago. 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 flying from Glasgow to Chicago round-trip?

What are the cheapest airlines to fly from Glasgow to Chicago one-way?

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

How can I find direct flights from Glasgow to Chicago?

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

What is the cheapest month to book a flight from Glasgow to Chicago?

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 to Chicago

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

Top 10 airlines flying from Glasgow to Chicago

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 to Chicago?

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

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

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

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Cheapest flights from Glasgow to Chicago
Explore the most affordable flight options available from Glasgow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 April 2025.