Cheap flights from Bulgaria to London from £55

In general, June is the cheapest month to fly from Bulgaria to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £0. The month of March is another great option to travel to London Heathrow Airport, with average flight prices from Bulgaria averaging around £137.

On average, the least expensive day to fly to London Heathrow Airport from Bulgaria is on a Thursday. momondo users have found tickets for Thursday departures for as low as £113. 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 £226.

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 Bulgaria to London Heathrow Airport in the evening for as low as £135. 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 £217 on average. Flights to London Heathrow Airport from Bulgaria in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Sofia to London Heathrow for the best Bulgaria - London Heathrow flight prices

There are 2 cabin classes available to choose from on Bulgaria 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.

You could potentially save up to 35% on your flight if you consider stops on a Bulgaria to London Heathrow Airport flight.

Air Serbia is the most popular carrier operating from Bulgaria to London Heathrow

Bulgaria Air, British Airways and LOT are the top three most popular airlines that fly to London Heathrow Airport from Bulgaria according to our data. Bulgaria Air is the first choice among our users, with 52% 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 12% of flights between Bulgaria and London have experienced a delay on any given week. The average delay length over the past 12 months has been 91 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.

Saturday 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 10% of their flights experiencing any sort of delay.

As of September 2026, 4 flights take off from Bulgaria and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 50% of weekly flights taking off on this day.

If you’re flying from a popular airport in Bulgaria, such as Sofia or Burgas, and flying into London Heathrow Airport, then you can expect flight times to average 3h 20m and 7h 10m, respectively.