Cheap flights from London Heathrow Airport to Barcelona from £27

If you aren’t able to travel during the month of December, then book flights to Barcelona from London Heathrow Airport during January instead. Flights to Barcelona in January, while not as cheap as those in December, still average around £125.

Our data shows that Monday is the least expensive day to fly to Barcelona. Tickets to fly out on this day can be as low as £118. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Barcelona for around £144.

Flying to Barcelona from London Heathrow Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as £120 when looking at flights departing in the afternoon. Flights in the morning are often more expensive, with an average ticket price of £137.

Fly from London Heathrow to Barcelona-El Prat for the best London Heathrow - Barcelona flight prices

You are more likely to see cheaper flights to Barcelona from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Barcelona for around £145 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona from London Heathrow Airport for as low as £125 on momondo.

Vueling is the most popular carrier operating from London Heathrow to Barcelona

Vueling, British Airways and Iberia are the top three most popular airlines that fly to Barcelona from London Heathrow Airport according to our data. Vueling is the first choice among our users, with 53% of people opting to fly with this airline when travelling to Barcelona. Keep in mind that there are 9 different airlines that fly to Barcelona on a routine basis, so you have a few additional options to choose from.

Historically, on average around 19% of flights between London and Barcelona have experienced a delay on any given week. The average delay length over the past 12 months has been 115 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon 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. Friday 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 18% of their flights experiencing any sort of delay.

The number of flights available between London Heathrow Airport and Barcelona is 18 per day as of May 2026. The most frequent departure time is 09:00, with 45% of daily flights leaving at midday.

As of May 2026, 126 flights take off from London Heathrow Airport and land in Barcelona each week. The most common flight departure day for this route is Mon, with 26% of weekly flights taking off on this day.