Initially, the check-in service at the Makkasan Station will be available only for people flying with Thai Airways International and Bangkok Airways. More airlines are expected to set up check-in counters in the future.

"Passengers who want to check in and load their luggage can do this from three to 13 hours before departing," said Yuthana Thapcharoen, governor of the State Railway of Thailand (SRT).

There are two train services: the Express Line, a 15-minute non-stop ride from Makkasan terminal to the airport and the City Line, a commuter train that stops at eight stations and takes about 30 minutes to travel.

Tickets for the Express Line are Bt150 ($5) per trip, while fares on the City Line range from Bt15 to Bt45 (45 cents and $1.50) per person, depending on the distance they travel.

Baggage can be checked in by passengers using both express and commuter trains.

The baggage check-in system was developed by the SRT and Airports of Thailand (AOT).

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