Cheap flights from Barcelona to London from £20

In general, February is the cheapest month to fly from Barcelona to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £40. The month of December is another great option to travel to London Heathrow Airport, with average flight prices from Barcelona averaging around £45.

On average, the least expensive day to fly to London Heathrow Airport from Barcelona is on a Sunday. momondo users have found tickets for Sunday departures for as low as £107. 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 £163.

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 Barcelona to London Heathrow Airport in the evening for as low as £118. 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 £231 on average. Flights to London Heathrow Airport from Barcelona at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to London Heathrow Airport from Barcelona when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £127 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 Barcelona for as low as £114 on momondo.

Historically, on average around 15% of flights between Barcelona and London 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 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, Vueling have had the fewest delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

As of May 2026, there are 16 flights per day flying from Barcelona to London Heathrow Airport. The most common time of day flights depart is 07:00, with 42% of flights taking off at midday.

The number of flights available between Barcelona and London Heathrow Airport is 112 per week as of May 2026. The most frequent departure day is Wed, with 32% of weekly flights leaving on this day.