Cheap flights from Glasgow Intl Airport to London from $81

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Glasgow Intl Airport, with most prices found around $149. If you’re not able to fly to London Heathrow Airport in February, then January is your next best option. Flight prices from Glasgow Intl Airport to London Heathrow Airport during January average around $152.

Our data shows that Friday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $766. The most expensive day to fly to London Heathrow Airport is Tuesday, with ticket prices averaging around $1,042.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Glasgow Intl Airport to London Heathrow Airport in the evening for as low as $721. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $949.

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

You are more likely to see cheaper flights to London Heathrow Airport from Glasgow Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $179 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Glasgow Intl Airport for as low as $156 on momondo.

There are 3 cabin classes available to choose from on Glasgow Intl Airport to London Heathrow 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 10% of flights between Glasgow and London have experienced a delay on any given week. The average delay length over the past 12 months has been 97 minutes.

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

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

According to our data, British Airways have had the least number of delays on this route over the last 12 months; with about 10% of their flights experiencing any sort of delay.

As of August 2026, 9 flights take off from Glasgow Intl Airport and land in London Heathrow Airport each day. The most common flight departure time for this route is 5:00PM, with 55% of daily flights taking off in the afternoon.

As of August 2026, there are 68 flights per week flying from Glasgow Intl Airport to London Heathrow Airport. The most common day of the week flights depart is Tue, with 72% of flights taking off on this day.