Cheap flights from London Heathrow Airport to Sofia from $99

The cheapest month to fly to Sofia from London Heathrow Airport is in January. Flight prices, which tend to average around $175, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Sofia from London Heathrow Airport during November instead. Flights to Sofia in November, while not as cheap as those in January, still average around $191.

According to our data, Wednesday is the cheapest day to fly to Sofia from London Heathrow Airport. The lowest ticket price found for a Wednesday departure recently was $158. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from London Heathrow Airport to Sofia on a Tuesday will generally be more expensive and average around $285. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

At noon is the cheapest time of day to fly from London Heathrow Airport to Sofia when you can find flight prices for as low as $156. Flying to Sofia at noon is an ideal time because this is during off-peak travel hours. In the afternoon is when there is more demand to fly to Sofia, so prices are often more expensive at around $236 per ticket.

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 $279 when searching weeks out. 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 $264 on momondo.

You could potentially save up to 21% on your flight if you consider stops on a London Heathrow Airport to Sofia flight.

As of May 2026, prices for London Heathrow Airport to Sofia flights are approximately 4% more expensive when compared to flights at the same time last year.

Historically, on average around 13% 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 116 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

According to our data, Bulgaria Air have had the least number of delays on this route over the last 12 months; with about 10% of their flights experiencing any sort of delay.