Cheap flights from Slovenia to London from £68

In general, March is the cheapest month to fly from Slovenia to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £164. The month of October is another great option to travel to London Heathrow Airport, with average flight prices from Slovenia averaging around £164.

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 Slovenia to London Heathrow Airport in the evening for as low as £108. 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 afternoon when prices are £152 on average. Flights to London Heathrow Airport from Slovenia in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Ljubljana Joze Pucnik to London Heathrow for the best Slovenia - London Heathrow flight prices

There are 2 cabin classes available to choose from on Slovenia to London Heathrow 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 22% of flights between Slovenia and London have experienced a delay on any given week. The average delay length over the past 12 months has been 112 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. Monday 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 22% of their flights experiencing any sort of delay.

As of April 2026, there are 3 flights per week flying from Slovenia to London Heathrow Airport. The most common day of the week flights depart is Mon, with 33% of flights taking off on this day.

If you’re flying from a popular airport in Slovenia, such as Ljubljana or Maribor, and flying into London Heathrow Airport, then you can expect flight times to average 2h 20m and 25h 45m, respectively.