The shape of the network
The BTS is the elevated one you can see, running above the main roads, with the Sukhumvit line covering the long north-south spine and the Silom line crossing it. They interchange at Siam, which is the single station worth memorising because almost every BTS journey either passes through it or changes there.
The MRT runs underground on a different alignment, and its Blue Line loops through areas the Skytrain does not reach, including the old city side and Chinatown. The two connect at several points, and the connections are walks between separate stations rather than a single concourse. MRT Sukhumvit and BTS Asok are the busiest example, linked through the metro station's Exit 3.
Choosing a ticket
For a first trip, the honest answer is usually the simplest one: buy a single journey card at the machine for each BTS ride and a token for each MRT ride, and stop optimising. The systems are distance-based, the machines have English, and the queue moves.
If you expect several Skytrain trips a day for several days, the Rabbit Card removes the per-trip machine queue. BTS sells it at station ticket offices for a 120 baht issuance fee with no separate deposit, and top-ups are available at BTS offices, the MRT Yellow and Pink Line offices, BRT offices and vending machines. The BTS also sells a one-day pass giving unlimited travel within the day it is registered.
On the MRT side, the operator publishes its own card options, including an EMV card alongside the traditional MRT and MRT Plus passenger cards, so the payment landscape there is moving on its own schedule.
| If you are | Buy | Why |
|---|---|---|
| Here three days, mostly walking | Single journey cards and tokens | No card fee, nothing left over |
| Riding the BTS daily | Rabbit Card | Skip the machine queue each time |
| Doing one heavy Skytrain day | BTS one-day pass | Unlimited trips within that day |
How a journey actually goes
When the train is the wrong choice
Rail is excellent along its corridors and useless off them. Large parts of the old city, including the Grand Palace area, sit away from the Skytrain, and that is where the river boats and the metro earn their place. A journey that looks like two trains and a long walk is often one boat ride or one short taxi.
Check the last train times against your evening plans, too. Published service ends around 01:00 on the BTS, and a night that runs later becomes a taxi night whether you planned it or not.