Cheap flights from London Heathrow Airport to Southeast Asia from £237

The month of November is, on average, the cheapest month to fly to Southeast Asia from London Heathrow Airport, with most prices found around £613. If you are unable to visit Southeast Asia during the month of November, then departing from London Heathrow Airport during the month September is also very affordable. Most momondo users find prices during this month for around £650.

Our data shows that Monday is the least expensive day to fly to Southeast Asia. Tickets to fly out on this day can be as low as £812. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Southeast Asia on Friday is £855.

In the afternoon is the cheapest time of day to fly from London Heathrow Airport to Southeast Asia when you can find flight prices for as low as £788. Flying to Southeast Asia in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around £943. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from London Heathrow to Ho Chi Minh City for the best London Heathrow - Southeast Asia flight prices

You are more likely to see cheaper flights to Southeast Asia from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Southeast Asia for around £698 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southeast Asia from London Heathrow Airport for as low as £657 on momondo.

There are 4 cabin classes available to choose from on London Heathrow Airport to Southeast Asia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Air China, Shenzhen Airlines, and Oman Air are the most popular carriers operating from London Heathrow to Southeast Asia

Etihad Airways, EVA Air and Air China are the top three most popular airlines that fly to Southeast Asia from London Heathrow Airport according to our data. Etihad Airways is the first choice among our users, with 30% of people opting to fly with this airline when travelling to Southeast Asia. Keep in mind that there are 48 different airlines that fly to Southeast Asia on a routine basis, so you have a few additional options to choose from.

As of August 2026, there are 53 flights per day flying from London Heathrow Airport to Southeast Asia. The most common time of day flights depart is 22:00, with 62% of flights taking off in the evening.

As of August 2026, there are 375 flights per week flying from London Heathrow Airport to Southeast Asia. The most common day of the week flights depart is Fri, with 15% of flights taking off on this day.