Search for cheap flights and last-minute deals with Netflights. We've scanned all the flights from London Heathrow to Khon Kaen, across the six airlines that offer this route. We've found that 03 / Mar / 2026 is the cheapest date to travel at the moment, but it's best to go through the results to see which flight suits you.
The most popular airlines offering flights to Khon Kaen are Thai Airways International, Qatar Airways & Turkish Airlines. Thai Airways International is the most popular one, but that doesn’t mean their flights will be the cheapest. If you can't find a flight time that suits you, why not look at flying out from a different airport?
Generally speaking, the flight from London Heathrow to Khon Kaen takes around 18 hrs 5 mins. The fastest flight takes 15 hrs to cover the 9474 km distance. You can view all flight times yourself in the results list.
The cheapest month to fly to Khon Kaen is December, while April is when the prices of flights, hotels and car hire will be at their highest. If you need somewhere to stay for your trip to Thailand, take a look at our accommodation options.
