The cheapest times to fly from LHR to DMK are

  • October 22nd to November 18th (except the week of October 29th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from LHR to DMK is mid November. Prices can be as high as $1311 for Friday flights during late October to early November, or as low as $665 for Thursday flights around mid November.


When to Fly to Bangkok

Flying from London (LHR) to Bangkok (DMK) will usually cost between $681 to $1002 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid November with an average ticket price of $779. Due to high demand the most expensive time to fly is late October to early November, with an average price of $902. Planning your trip to low-cost times can easily save you $123 on economy flights and even more on first-class flights. Generally, any price below $841 can be considered a good price for a round-trip LHR to DMK flight.

See below for a graph of average weekly prices for the LHR to DMK route. All prices are for round-trip tickets in USD.

LHR to DMK Flight Prices

Compared to other flights, the LHR to DMK flight is cheaper than the average and costs slightly more than the average flight leaving from London. The average price per mile (for a direct flight) is $0.09, which is far below average.


Flight Prices by Day of the Week

Thursday is usually the cheapest day to depart and return on this flight. Fridays are the most expensive days to fly to Bangkok, and Mondays are the most expensive days to return to London. Selecting flights on the least expensive days could save you up to $122 (13%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Thursday and returning a week later will cost an average of $780. Return trip prices are from the DMK to LHR flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from LHR to DMK can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 11 hour 40 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from LHR to DMK while comparing.

Destination alternative #1: Suvarnabhumi International Airport (BKK) in Bangkok

  • 19 miles (31 km) away from DMK
  • Usually 37.10% less expensive than DMK
  • Nonstop flights available

See LHR to BKK flights


Flight Hacking LHR to DMK

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from LHR to DMK — but Champion Traveler does!

Hack #1: Athens (LHR > ATH > DMK)

  • Price for both tickets: $642
  • Average savings: $199 (23.66%)

See LHR to KUL flights

Hack #2: Kuala Lumpur (LHR > KUL > DMK)

  • Price for both tickets: $658
  • Average savings: $183 (21.76%)

See LHR to ATH flights

Hack #3: Singapore (LHR > SIN > DMK)

  • Price for both tickets: $667
  • Average savings: $175 (20.75%)

See LHR to SIN flights


Flight Questions Answered

Still have questions about flying from LHR to DMK? We’ve got answers.

Which airlines fly this route?

You can find 22 major airlines flying this route most often: Air China, Air India, AirAsia, Beijing Capital, Cathay Pacific, China Eastern, China Southern, Etihad, Finnair, Hainan, Kuwait Airways, Malindo Air, Nok Air, NokScoot, Oman Air, Qatar Airways, Shandong, Shenzhen, Thai AirAsia, Thai Lion Mentari, Tianjin Airlines, Vietnam Airlines, and potentially more during busy seasons.

How far away is it from Don Mueang International Airport to London Heathrow Airport?

The distance between the two airports is roughly 5932 miles or 9547 kilometers.

How long does it take to fly from LHR to DMK?

The real-world flight time for a nonstop LHR to DMK flight is about 11 hour 40 minutes.

How many flights go between London and Bangkok?

It depends on the day of the week and the date, but a typical day might have around 9 available flights from LHR to DMK.


Airport Location Info


Departing Airport

Origination code LHR
Origination airport name London Heathrow Airport
City London
Country the United Kingdom
Latitude 51.5
Longitude -0.5

Return Airport

Destination code DMK
Destination airport name Don Mueang International Airport
City Bangkok
Country Thailand
Latitude 13.9
Longitude 100.6


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.