Cheap flights from the United Kingdom to London from £45

In general, January is the cheapest month to fly from United Kingdom to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £101. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from United Kingdom averaging around £102.

On average, the least expensive day to fly to London Heathrow Airport from United Kingdom is on a Sunday. momondo users have found tickets for Sunday departures for as low as £628. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £655.

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 United Kingdom to London Heathrow Airport in the evening for as low as £571. 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 morning when prices are £656 on average. Flights to London Heathrow Airport from United Kingdom in the morning 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 United Kingdom - London Heathrow flight prices

No. A direct flight is the cheapest option for a flight between United Kingdom to London Heathrow Airport.

British Airways and KLM are the most popular carriers operating from United Kingdom to London Heathrow

British Airways, easyJet and KLM are the top three most popular airlines that fly to London Heathrow Airport from United Kingdom according to our data. British Airways is the first choice among our users, with 98% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 3 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 13% of flights between United Kingdom and London have experienced a delay on any given week. The average delay length over the past 12 months has been 99 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 13% of their flights experiencing any sort of delay.

As of May 2026, 38 flights take off from United Kingdom and land in London Heathrow Airport each day. The most common flight departure time for this route is 10:00, with 40% of daily flights taking off at midday.

267 flights are operational weekly from United Kingdom to London Heathrow Airport as of May 2026. The most popular departure day for this route is Sat, with 57% of flights per week taking off on this day.