Cheap flights from London Heathrow Airport to Glasgow from £48

In general, February is the cheapest month to fly from London Heathrow Airport to Glasgow Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £125. If you’re not able to fly to Glasgow Intl Airport in February, then December is your next best option. Flight prices from London Heathrow Airport to Glasgow Intl Airport during December average around £125.

On average, the least expensive day to fly to Glasgow Intl Airport from London Heathrow Airport is on a Thursday. momondo users have found tickets for Thursday departures for as low as £79. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around £107. These prices are subject to change though, so be sure to set up a Price Alert for flights to Glasgow Intl Airport.

In the morning is the cheapest time of day to fly from London Heathrow Airport to Glasgow Intl Airport when you can find flight prices for as low as £85. Flying to Glasgow Intl Airport in the morning is an ideal time because this is during off-peak travel hours. Flights to Glasgow Intl Airport are more costly in the afternoon, with an average ticket price of £121. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from London Heathrow to Glasgow Intl for the best London Heathrow - Glasgow Intl flight prices

You are more likely to see cheaper flights to Glasgow Intl Airport from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Glasgow Intl Airport for around £142 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Glasgow Intl Airport from London Heathrow Airport for as low as £119 on momondo.

There are 3 cabin classes available to choose from on London Heathrow Airport to Glasgow Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 16% of flights between London and Glasgow have experienced a delay on any given week. The average delay length over the past 12 months has been 102 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 16% of their flights experiencing any sort of delay.

As of September 2026, there are 9 flights per day flying from London Heathrow Airport to Glasgow Intl Airport. The most common time of day flights depart is 18:00, with 49% of flights taking off in the evening.

As of September 2026, there are 69 flights per week flying from London Heathrow Airport to Glasgow Intl Airport. The most common day of the week flights depart is Fri, with 75% of flights taking off on this day.