Cheap flights from London Heathrow Airport to Sofia from £73

The month of January is, on average, the cheapest month to fly to Sofia from London Heathrow Airport, with most prices found around £130. If you aren’t able to travel to Sofia during the month of January, then flying in November is also cheap. Prices for this month can be found on momondo for an average of £142.

On average, the least expensive day to fly to Sofia from London Heathrow Airport is on a Thursday. momondo users have found tickets for Thursday departures for as low as £124. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Sofia for around £196.

Our data shows that the cheapest London Heathrow Airport to Sofia flights are usually those with departure times in the evening. Our users have found flights to Sofia in the evening for as low as £135. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £191 on average. Flights to Sofia from London Heathrow Airport in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to Sofia from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around £210 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from London Heathrow Airport for as low as £183 on momondo.

There are 2 cabin classes available to choose from on London Heathrow Airport to Sofia 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 22% on your flight if you consider stops on a London Heathrow Airport to Sofia flight.

As of June 2026, prices for London Heathrow Airport to Sofia flights are approximately 61% more expensive when compared to flights at the same time last year.

British Airways and Air Serbia are the most popular carriers operating from London Heathrow to Sofia

Bulgaria Air, British Airways and Lufthansa are the top three most popular airlines that fly to Sofia from London Heathrow Airport according to our data. Bulgaria Air is the first choice among our users, with 36% of people opting to fly with this airline when travelling to Sofia. Keep in mind that there are 7 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

Historically, on average around 12% of flights between London and Sofia have experienced a delay on any given week. The average delay length over the past 12 months has been 121 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights departing in the early afternoon 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, Bulgaria Air have had the fewest delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

Warsaw (WAW) was the most common stop: 48% of momondo users choosing one-stop flights on this route connected there.

Flights via Munich (MUC) offer the lowest average return price of £208.

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 5h 16m.

Frankfurt am Main (FRA) has the shortest average stopover time for this route: 1h 26m.