Cheapest Flights from London to Bangkok: Complete 2026 Guide

Finding the Cheapest Flights from London to Bangkok

The London to Bangkok route is one of the most popular long-haul connections from the UK, with millions of travelers making the journey each year to explore Thailand's stunning beaches, vibrant street food scene, and ancient temples. The good news is that intense competition among airlines keeps prices remarkably affordable for such a long flight.

Best Airlines for London to Bangkok

Direct flights are operated by British Airways (from Heathrow) and Thai Airways (from Heathrow), with flight times of approximately 11 hours. However, the cheapest options often involve a single stopover:

When to Book for the Lowest Prices

Our data shows the best time to book London to Bangkok flights is 6-8 weeks before departure for economy class. Here are the seasonal price trends:

Money-Saving Tips

1. 1.Be flexible with dates — flying midweek (Tuesday-Thursday) can save £50-100
2. 2.Consider nearby airports — Bangkok's Don Mueang (DMK) serves budget airlines and can be cheaper than Suvarnabhumi (BKK)
3. 3.Use fare alerts — set up price alerts on flyingradar24 to catch flash sales
4. 4.Book one-way tickets — sometimes two one-way tickets on different airlines are cheaper than a return
5. 5.Check stopover deals — Emirates and Qatar often offer free hotel stays during long layovers

What to Expect on the Route

The total journey from London to Bangkok covers approximately 9,540 km. Direct flights take around 11 hours eastbound and 12 hours westbound due to prevailing winds. With a stopover, expect 14-18 hours total travel time, though some connections can stretch to 24+ hours with longer layovers.

Bangkok's Suvarnabhumi Airport (BKK) is well-connected to the city center via the Airport Rail Link, taking just 30 minutes to reach downtown Bangkok.