From Thai Tourism Authority 

The State Railway of Thailand (SRT) is organising a special excursion train from Bangkok to Ayutthaya with steam locomotive to celebrate its 127th anniversary on 26 March 2024.

Travellers will get a chance to ride on a Pacific steam locomotive, numbers 824 and 850, from the World War II era. The special steam train ride will leave from Hua Lamphong.

Train No. 901/902 will depart the station at 08.10 Hrs. and will arrive in Ayutthaya at 10.20 Hrs. Passengers will have six hours to tour the ancient capital, before the train leaves for Bangkok at 16.40 Hrs. and arrive in Bangkok at 18.50 Hrs.

The train will stop at Sam Sen, Bang Sue, Don Mueang, and Rangsit stations, so passengers can board or disembark at any of these stations.

Bookings open on 25 February 2024, from 08.30 Hrs. onwards via D-Ticket mobile application and website (www.dticket.railway.co.th) or at the ticket booths at SRT stations across Thailand.

Round-trip prices for adults and children are 329 Baht for third-class, 529 Baht for second-class air-conditioned, and 799 Baht for sleeper and special air-conditioned cars. The price includes snacks and drinks on both the outbound and return trips.

 

too bad I will not be there . I'd certainly splurge  on special air-conditioned on such special occasion

13 hours ago, reader said:

Round-trip prices for adults and children are 329 Baht for third-class, 529 Baht for second-class air-conditioned, and 799 Baht for sleeper and special air-conditioned cars. The price includes snacks and drinks on both the outbound and return trips.

 

Not quite sure why there is reference to a sleeper on a day trip, although catering for a nap and a fuck opportunity is always welcome!