Cheap flights from Glasgow Intl Airport to London from £63

In general, February is the cheapest month to fly from Glasgow Intl Airport to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £113. The month of March is another great option to travel to London Heathrow Airport, with average flight prices from Glasgow Intl Airport averaging around £119.

On average, the least expensive day to fly to London Heathrow Airport from Glasgow Intl Airport is on a Friday. momondo users have found tickets for Friday departures for as low as £625. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Sunday is £680.

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 £562. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £704 on average. Flights to London Heathrow Airport from Glasgow Intl Airport in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 £135 when searching weeks before you fly. 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 £122 on momondo.

There are 4 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 9% 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 98 minutes.

Generally, flights departing at night 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. Thursday 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 9% of their flights experiencing any sort of delay.

As of October 2026, 8 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 13:00, with 56% of daily flights taking off in the afternoon.

As of October 2026, there are 62 flights per week flying from Glasgow Intl Airport to London Heathrow Airport. The most common day of the week flights depart is Fri, with 81% of flights taking off on this day.