Cheap flights from London to Thailand from £289

In general, May is the cheapest month to fly from London to Thailand. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £572. If you are unable to visit Thailand during the month of May, then departing from London during the month September is also very affordable. Most momondo users find prices during this month for around £573.

The cheapest day to depart on your flight to Thailand is on a Monday when prices can be found for as low as £776. This is often the case because there is less demand to fly during this day of the week. On the other hand, Saturday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £826.

Our data shows that the cheapest London to Thailand flights are usually those with departure times in the evening. Our users have found flights to Thailand in the evening for as low as £772. In contrast, the most expensive time of day to depart to Thailand is in the morning when prices are around £879.

Fly from London Heathrow to Phuket City for the best London - Thailand flight prices

You are more likely to see cheaper flights to Thailand from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Thailand for around £699 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Thailand from London for as low as £663 on momondo.

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

China Eastern, Etihad Airways, and Qatar Airways are the most popular carriers operating from London to Thailand

EVA Air, Thai Airways and Etihad Airways are the top three most popular airlines that fly to Thailand from London according to our data. EVA Air is the first choice among our users, with 34% of people opting to fly with this airline when travelling to Thailand. Keep in mind that there are 42 different airlines that fly to Thailand on a routine basis, so you have a few additional options to choose from.

Historically, on average around 14% of flights between London and Thailand have experienced a delay on any given week. The average delay length over the past 12 months has been 91 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. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, EVA Air have had the fewest delays on this route over the last 12 months, with about 7% of their flights experiencing any sort of delay.

9 flights are operational daily from London to Thailand as of June 2026. The most popular departure time for this route is 21:00, with 69% of flights per day taking off in the evening.

As of June 2026, 69 flights take off from London and land in Thailand each week. The most common flight departure day for this route is Tue, with 16% of weekly flights taking off on this day.