Cheap flights from Barcelona-El Prat Airport to London from £20

In general, January is the cheapest month to fly from Barcelona-El Prat Airport to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £100. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from Barcelona-El Prat Airport averaging around £106.

On average, the least expensive day to fly to London Heathrow Airport from Barcelona-El Prat Airport is on a Sunday. momondo users have found tickets for Sunday departures for as low as £124. 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 £164.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Barcelona-El Prat Airport to London Heathrow Airport in the morning for as low as £136. 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 £229 on average. Flights to London Heathrow Airport from Barcelona-El Prat Airport 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-El Prat - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Barcelona-El Prat Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £129 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-El Prat Airport for as low as £106 on momondo.

There are 4 cabin classes available to choose from on Barcelona-El Prat Airport 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.

Historically, on average around 14% 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 117 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. Thursday 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 10% of their flights experiencing any sort of delay.

As of October 2026, there are 12 flights per day flying from Barcelona-El Prat Airport to London Heathrow Airport. The most common time of day flights depart is 07:00, with 34% of flights taking off at midday.

As of October 2026, there are 84 flights per week flying from Barcelona-El Prat Airport to London Heathrow Airport. The most common day of the week flights depart is Wed, with 44% of flights taking off on this day.