Originally Posted by
giblet
I've looked at some other threads but I know that this answer often hinges on time of day. I've got a flight arriving at DMK at 4:20 p.m. and then a long-haul flight leaving at BKK at 9:15 p.m.
I'm assuming this is fine but need some reassurance.

There are a couple of options available.
- First remember that the distance between Suvarnabhumi Airport (BKK) and Don Muang Airport (DMK) is 29.5 miles (47.5 km).
- The free shuttle that runs to and from BKK and DMK has a transfer time of anywhere from 50 minutes to two hours depending on the time of day and traffic.
- Taxi rates between BKK and DMK or vice versa should run approximately 350-450 baht. There will be some small toll fees in addition to the fare (approx 60-65 thb).
- There is a public bus (#554 & #555) that runs between Suvarnabhumi Airport and Don Muang Airport. The fare is approx. 35 baht. If you have luggage, it’s best to use alternative options.
- Buses that depart from Don Mueang Airport (DMK) and arrive at BKK and drop off at level 4, gate 5.
- You can also use Uber Bangkok.
For more details,
http://www.pausethemoment.com/bkk-to-dmk-for-free/