Cheap flights from Colombo to London from $521

The month of May is, on average, the cheapest month to fly to London Heathrow Airport from Colombo, with most prices found around $1,167. If you aren’t able to travel during the month of May, then book flights to London Heathrow Airport from Colombo during October instead. Flights to London Heathrow Airport in October, while not as cheap as those in May, still average around $1,223.

Fly from Colombo Bandaranaike Intl to London Heathrow for the best Colombo - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Colombo when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $1,331 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Colombo for as low as $1,087 on momondo.

There is only 1 cabin class available to choose from on Colombo 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.

Historically, on average around 15% of flights between Colombo and London have experienced a delay on any given week. The average delay length over the past 12 months has been 103 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the morning 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. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, SriLankan Airlines have had the fewest delays on this route over the last 12 months, with about 15% of their flights experiencing any sort of delay.

As of September 2026, there are 2 flights per day flying from Colombo to London Heathrow Airport. The most common time of day flights depart is 13:00, with 100% of flights taking off in the afternoon.

The number of flights available between Colombo and London Heathrow Airport is 14 per week as of September 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.