Changing between Suvarnabhumi (BKK) and Don Mueang (DMK) means leaving one airport, travelling across Bangkok and completing departure formalities at the other. Before booking, check that the whole journey works: getting off the first aircraft, entering Thailand if required, collecting bags, finding transport, crossing the city and reaching the next gate.
There is no single connection time that makes every BKK–DMK itinerary safe. If the plan only works with an on-time arrival, a short queue and clear roads, choose a later flight, an overnight stop or a flight from the same airport. Use the worksheet below to expose those assumptions before paying.
Official information checked on 6 October 2026. This guide covers changing airports in either direction.
Start with the airport codes on both tickets
Write down the arrival airport and the departure airport, including the date. “Bangkok” alone is not enough, and an airline's name is not a substitute for checking the actual booking.
At Don Mueang, Terminal 1 is the international terminal and Terminal 2 is domestic. Verify the terminal again in your airline's flight details. Don Mueang airport information
Then ask the airline or booking provider:
- Is this a protected connection, or am I responsible for making the second flight?
- Who arranges the road transfer and handles my checked baggage?
- What happens if the first flight is delayed and I miss the second?
- Must I contact someone before buying replacement travel?
Keep the answers with the booking. Buying two flights in one transaction does not tell you how an airport change will be handled. For a self-transfer, plan to take responsibility for your bags and the journey between airports unless the provider explicitly confirms otherwise.
Work out the arrival steps before choosing transport
An international arrival followed by a road transfer requires entry into Thailand. Check your passport and entry eligibility with the relevant Thai embassy or the official Thai e-Visa service before booking. Do not apply an airside-transit assumption to a trip that leaves the airport.
For non-Thai travellers entering Thailand, the Immigration Bureau's TDAC guidance says the arrival card should be submitted within the three-day submission window, including arrival day. Its transit exemption applies when you do not pass immigration; leaving the airport requires TDAC. Check the official TDAC guidance for your circumstances.
Allow separate time for disembarking, passport control where applicable, baggage collection and customs. Don Mueang's published arrival process puts these steps before public transport. If a checked bag fails to arrive, speak to the airline's baggage service before leaving the reclaim area. Don Mueang arrival procedure
A domestic arrival usually removes the entry-immigration step, but you still need to reach the public arrivals area and collect checked luggage. Carry-on-only travel removes a baggage-collection task; it does not remove the road journey or the next airport's departure checks.
Using the free inter-airport shuttle
The free shuttle is for passengers connecting between flights at the two airports. Suvarnabhumi's published rules require an onward flight ticket or confirmation and a passport or national ID. Save the itinerary offline and keep the identification document accessible. The ordinary service is not open to general visitors without a flight connection. AOT shuttle rules
From Suvarnabhumi to Don Mueang
AOT lists boarding at the main terminal's Level 2, Gate 3, inner curb. Its published schedule is 05:00 to midnight, every 30 minutes. Ask the shuttle counter about the next departure and current journey conditions; a published interval does not guarantee an immediate seat. Do not confuse this bus with the airport's internal circulator. Suvarnabhumi transport information
From Don Mueang to Suvarnabhumi
AOT confirms the free service for connecting passengers, but its current pages give conflicting boarding locations and closing-time information. Before heading outside, ask public-arrivals information staff where to register and board the BKK shuttle, and confirm the next departure. For advance enquiries, the airport lists its 24-hour information centre at +66 2 535 1192. Don Mueang information centre, inter-airport shuttle listing
If your transfer depends on the first or last bus, get that departure confirmed before relying on it. Keep a paid alternative in the budget.
When a paid transfer makes more sense
A taxi or arranged car can be useful outside shuttle availability, when the queue is long or when your group needs particular luggage space. It may reduce waiting; it cannot remove road congestion.
Use the airport's designated taxi service, an authorised pickup point or a confirmed transfer booking. Show the driver the airport name, code and departure terminal. Before leaving, clarify the fare basis and whether tolls, airport charges and luggage charges are included. Avoid a fare estimate that leaves you without enough money for the complete journey.
For detailed arrival-transport choices, see Suvarnabhumi to Bangkok or Don Mueang to Bangkok. A rail-based alternative needs its own door-to-door calculation, including interchanges, station walks and service hours. Do not improvise an unfamiliar route solely because a road estimate has worsened.
Fill in this connection worksheet
Use Bangkok local dates and times throughout. Record the airline's actual requirements, then add your planning allowances. A counter-closing time is a deadline for completing a task, not a sensible target for joining its queue.
1. Next flight and deadlines
- Airport, terminal, flight number and departure: ______
- Check-in, document-check and bag-drop deadlines: ______
- Required gate reporting time: ______
Online check-in may leave baggage and document checks outstanding. For example, Bangkok Airways' check-in instructions distinguish these tasks and give separate gate requirements. Use the rules for your own airline, airport and flight.
2. Target arrival at the second airport
Work backwards from both the counter requirements and the gate reporting time. Allow for check-in queues, security, departure immigration if applicable and walking to the gate. Choose an airport-arrival target early enough to meet both sets of requirements, including the airline's recommended reporting time.
- My target time at the departure terminal: ______
3. Ground-transfer allowance
Keep the waiting and driving parts separate. Include finding the counter, registration, the next available vehicle, loading, road travel and walking from the drop-off point. Review traffic for the relevant day and time, and add room for deteriorating conditions rather than using only the fastest estimate.
- Waiting, boarding and loading: ______
- Road travel and terminal access: ______
- Extra disruption reserve: ______
- Target time to be ready for transport at the first airport: ______
4. Time needed after the first flight
- Scheduled arrival, including the date: ______
- Disembarking and reaching arrivals: ______
- Immigration, if applicable: ______
- Baggage collection and customs, if applicable: ______
- Extra time for assistance or travelling with children: ______
Subtract these allowances from your transport-ready target. Compare the resulting latest planned flight-arrival time with the first flight's schedule. How much delay could you absorb? If a routine setback consumes the entire margin, revise the itinerary.
Arithmetic example only: suppose your chosen arrival target at the second airport is 15:00, and your ground-transfer allowance plus reserve totals 2½ hours. You need to be ready for transport at 12:30. A first flight scheduled to arrive at 11:30 leaves only an hour for all arrival steps. These invented inputs demonstrate the calculation; they are not recommended journey times or a safe-connection promise.
Finally, repeat the worksheet with a later first-flight arrival and a longer road journey. Consider the cost of failure: an onward long-haul ticket, the day's last flight or a fixed event deserves a more cautious booking than a flexible afternoon plan.
If the connection starts to fail
Check both flights before leaving for the airport and again after landing. Once the remaining time no longer fits your worksheet, contact the onward airline or booking provider promptly. Explain that you are changing airports and ask about changes, no-show consequences and available alternatives. Do not assume a displayed flight delay also moves check-in deadlines.
Compare three practical options: a later departure from the intended airport, a suitable flight from the airport where you already are, or an overnight stay followed by travel the next day. Check seats and the full replacement cost before committing to another cross-city journey. Keep baggage receipts, delay evidence and transport receipts for any claim you are eligible to make; reimbursement is not guaranteed.
If you stay overnight, consider accommodation near the airport of the next departure and confirm its transfer arrangements. Leave enough time for the next morning's airport process too.
Save this mini checklist
- Both airport codes, terminals and local dates checked
- Entry eligibility and TDAC requirements checked
- Baggage responsibility and connection protection understood
- Airline counter, document, baggage and gate deadlines saved
- Shuttle documents ready; boarding point and next departure confirmed
- Paid transport and a later-flight or overnight fallback budgeted
- Worksheet includes waiting, road disruption and arrival formalities
The useful question is how much disruption your plan can absorb. Book a connection with enough room for the steps you actually need, and a fallback you can afford to use.