Daily rates at Long Term Parking usually beat on-airport taxi costs
Long Term Parking at Suvarnabhumi (BKK) sits in the dedicated long-stay area near the Main terminal, aimed at trips of 24 hours or more. You park your own car, keep your keys, and pay on exit based on the posted daily rate, which is typically cheaper than leaving a car in short-term for more than 2–3 days.
The car park connects to the Main terminal via shuttle transport, with ride times usually around 5–10 minutes depending on traffic on the internal airport roads. Factor that into your schedule on both departure and arrival. If your check-in closes 45 minutes before departure, pull into the lot at least 90 minutes before your flight time to leave room for parking, shuttle, and security.
This is an open, on-airport facility set up for long stays rather than quick drop-offs, so rows are longer and you may be walking a few hundred meters to the nearest shuttle pickup point. The trade-off is cost: over a 5–7 day trip, the total parking bill often undercuts a pair of city–airport taxi rides, especially at peak traffic times in Bangkok.
Payment usually happens at automatic machines or a manned booth close to the exit barrier. Bring cash or a working card, as some travellers report cards failing at Thai tolls and kiosks in general, and you do not want to be troubleshooting that with a queue of cars behind you at BKK.
Tip: Take a quick photo of your row sign and a nearby pole number before you board the shuttle; after a 10-day trip and a late-night arrival into the Main terminal, that picture can save you 15–20 minutes of wandering the lot with luggage.