Cheap flights from London Heathrow Airport to Southeast Europe from £54

The month of November is another great option to travel to Southeast Europe, with average flight prices from London Heathrow Airport averaging around £132.

The cheapest day to depart from London Heathrow Airport to Southeast Europe is on a Monday. Travellers who choose to depart for Southeast Europe on a Monday will often find tickets for as low as £193. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around £224. These prices are subject to change though, so be sure to set up a Price Alert for flights to Southeast Europe.

At midday is the cheapest time of day to fly from London Heathrow Airport to Southeast Europe when you can find flight prices for as low as £137. Flying to Southeast Europe at midday is an ideal time because this is during off-peak travel hours. Flights to Southeast Europe are more costly in the morning, with an average ticket price of £234. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from London Heathrow to Zagreb Franjo Tuđman for the best London Heathrow - Southeast Europe flight prices

You are more likely to see cheaper flights to Southeast Europe from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Southeast Europe for around £203 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southeast Europe from London Heathrow Airport for as low as £176 on momondo.

There are 3 cabin classes available to choose from on London Heathrow to Southeast Europe flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Croatia Airlines, British Airways, and Vueling are the most popular carriers operating from London Heathrow to Southeast Europe

British Airways, Aegean Airlines and Lufthansa are the top three most popular airlines that fly to Southeast Europe from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 57% of people opting to fly with this airline when travelling to Southeast Europe. Keep in mind that there are 21 different airlines that fly to Southeast Europe on a routine basis, so you have a few additional options to choose from.

As of March 2026, there are 12 flights per day flying from London Heathrow Airport to Southeast Europe. The most common time of day flights depart is 16:00, with 59% of flights taking off in the afternoon.

As of March 2026, there are 87 flights per week flying from London Heathrow Airport to Southeast Europe. The most common day of the week flights depart is Fri, with 28% of flights taking off on this day.