Bangkok has two airports: Suvarnabhumi Airport (BKK) and Don Mueang Airport (DMK). You can travel between them in several ways. However, the cheapest way is to take a free shuttle bus from BKK to DMK or from DMK to BKK.

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We would recommend you use it because the bus is running all the way through the expressway (Din Daeng Expressway & Don Mueang Tollway). This bus is very convenient and, of course, free of charge.
The bus is white-colored and has air conditioning. There is a storage area for luggage inside the bus, so there is no problem with having big luggage. The service is first come, first served, so no pre-booking is required.
Bangkok Airport Shuttle Bus Timetable
While scheduled times of shuttle bus departure were previously displayed in the Airport Shuttle Bus Timetable found at the bus stop, they have been removed. However, you can find the digital board at the bus stop to see the estimated time of the next bus departure.

The free shuttle bus from BKK to DMK runs daily. The first bus starts running from both airports at 5:00, and the last bus leaves at 24:00. The bus currently departs every 30 minutes.
The journey to another airport takes approximately 50-60 minutes. However, it might take twice that time when using shuttle bus service during rush hour or heavy rain, as it may be delayed due to traffic congestion. The last time, we traveled from Suvarnabhumi Airport to Don Mueang Airport in 1 hour and 20 minutes.
If you will be arriving at Suvarnabhumi Airport on an international flight and will have a tight schedule for a transfer, book the Bangkok Airport Fast Track Immigration Service. to avoid long lines at the airport immigration and get to your domestic flight from Don Mueang Airport on time.
Bangkok Airport Shuttle Bus Route Map
At the bus stop, you can find a digital board displaying the shuttle bus route map. It also displays the estimated time of the next departure and the current location of all the buses on the route, as well as their estimated arrival time.

Documents Required for Transfer
To use the free shuttle bus between Bangkok airports BKK and DMK, you need to present the following documents:
Ticket, e-ticket, or confirmation (itinerary) of the departing flight on the same or next day.
Passport or ID card (for Thai citizens).

Free Shuttle Bus from Suvarnabhumi to Don Mueang (BKK to DMK)
On the way from Suvarnabhumi Airport to Don Mueang Airport, a shuttle bus uses the following pick-up and drop-off points.
Boarding the shuttle bus at Suvarnabhumi Airport (BKK)
The free shuttle bus to DMK Airport departs from the 2nd floor of Suvarnabhumi Airport (BKK) (Arrivals), outside Gate 3.

You will see a desk on the right side where you should contact the staff and show your passport and proof of travel (e-ticket or boarding pass for a connecting flight) on that day or the next day. The staff will check your flight details. You will also need to provide your name and telephone number in the passenger list before boarding the bus. In busier times, they still seem to use some kind of label or sticker to mark passengers eligible for the service, but that was not the case the last time we took the shuttle bus.

Dropping off at Don Mueang Airport (DMK)
At Don Mueang Airport, buses previously dropped passengers at the upper (departures) level. However, the last time we took the bus, they dropped us on the first floor at gate 6, where you normally board the bus when traveling from DMK airport to BKK. If it was just because of the delay of the bus due to the traffic jam or it is the usual drop-off point, it is yet to be confirmed.
Free Shuttle Bus from Don Mueang to Suvarnabhumi (DMK to BKK)
On the way from Don Mueang Airport to Suvarnabhumi Airport, a shuttle bus uses the following pick-up and drop-off points.
Boarding the shuttle bus at Don Mueang Airport (DMK)
The free shuttle bus to BKK departs from Terminal 1 of Don Mueang Airport (DMK). The bus stop is located on the 1st floor, at gate 6. You just need to follow the signs leading to the "shuttle bus" to find the correct place.

Pay attention that, contrary to Suvarnabhumi Airport, the shuttle bus counter at Don Mueang Airport is located inside the terminal building, on the right side of exit No. 6, and you need to check in there first before getting out to the bus stop.

Dropping off at Suvarnabhumi Airport (BKK)
Buses drop off passengers on the departure level of Suvarnabhumi Airport at the 4th floor, gate 5. After that, they go back to board new passengers on the 2nd floor, gate 3.
Tips
Make your airport transfer between Suvarnabhumi Airport and Don Muang Airport in Bangkok a breeze with this reliable private transfer service. Say goodbye to the hassle of arranging taxis or waiting for shuttles – simply meet the driver at the airport, get help with your luggage, and hop into your private vehicle.
If you don't qualify for a free transfer by shuttle bus between Bangkok airports or want to travel more comfortably, choose another mode of transportation to transfer from BKK to DMK or from DMK to BKK.
More information about other facilities at Bangkok airports can be found here:
Suvarnabhumi International Airport (BKK)
Don Mueang International Airport (DMK)
Book a discounted Thailand SIM card here: SIM Card for Thailand (Airport Pick Up), and pick it up at the airport. Otherwise, you can get eSIM Thailand by instant email delivery and use it right after landing in Bangkok.


