Cheap flights from Glasgow to London from £50

In general, February is the cheapest month to fly from Glasgow to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £27. The month of November is another great option to travel to London Heathrow Airport, with average flight prices from Glasgow averaging around £51.

On average, the least expensive day to fly to London Heathrow Airport from Glasgow is on a Friday. momondo users have found tickets for Friday departures for as low as £562. 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 £633.

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 to London Heathrow Airport in the evening for as low as £496. 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 £660 on average. Flights to London Heathrow Airport from Glasgow 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 - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Glasgow when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £132 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 for as low as £104 on momondo.

There are 4 cabin classes available to choose from on Glasgow 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.

British Airways is the most popular carrier operating from Glasgow to London Heathrow

British Airways, easyJet and Loganair are the top three most popular airlines that fly to London Heathrow Airport from Glasgow according to our data. British Airways is the first choice among our users, with 96% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 4 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

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 96 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. Sunday 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 May 2026, there are 16 flights per day flying from Glasgow to London Heathrow Airport. The most common time of day flights depart is 13:00, with 41% of flights taking off in the afternoon.

115 flights are operational weekly from Glasgow to London Heathrow Airport as of May 2026. The most popular departure day for this route is Wed, with 34% of flights per week taking off on this day.