The group sent 20 representatives to file complaints at the Suvarnabhumi Airport police station at 11pm on Friday, saying they have lost Bt1.7 million.
Malee Sawaddee, 52, told police that she and friends bought the Bangkok-Hokkaido 5-day three-night package for Bt30,000 each from a tour agent in Samut Prakan.
But when they were came to the airport on Thursday to receive flight tickets for the trip, the tour agent did not turn up and the agent posted a message on the Line app saying that the tour would be indefinitely postponed without giving any explanation.