Cheap flights from Spain to London from £19

In general, January is the cheapest month to fly from Spain to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £98. The month of November is another great option to travel to London Heathrow Airport, with average flight prices from Spain averaging around £101.

On average, the least expensive day to fly to London Heathrow Airport from Spain is on a Sunday. momondo users have found tickets for Sunday departures for as low as £98. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Monday is £166.

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 Spain to London Heathrow Airport in the evening for as low as £83. 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 at midday when prices are £235 on average. Flights to London Heathrow Airport from Spain at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Bilbao to London Heathrow for the best Spain - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Spain when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £130 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 Spain for as low as £115 on momondo.

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

Vueling, British Airways, and KLM are the most popular carriers operating from Spain to London Heathrow

British Airways, Iberia and Vueling are the top three most popular airlines that fly to London Heathrow Airport from Spain according to our data. British Airways is the first choice among our users, with 61% 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 14% of flights between Spain and London have experienced a delay on any given week. The average delay length over the past 12 months has been 113 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. Saturday has historically seen more delays on average compared to the rest of the week.

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

As of March 2026, 97 flights take off from Spain and land in London Heathrow Airport each day. The most common flight departure time for this route is 15:00, with 49% of daily flights taking off in the afternoon.

As of March 2026, there are 684 flights per week flying from Spain to London Heathrow Airport. The most common day of the week flights depart is Sun, with 19% of flights taking off on this day.