Border between Thailand and Cambodia have severely impacted tourism, with widescale hotel cancellations in some provinces.
Group hotel bookings in provinces where conflict broke out have all been cancelled, the Tourism Authority of Thailand (TAT) said.
TAT Governor Thapanee Kiatphaibool said bookings were 100% cancelled for Ubon Ratchathani, Sa Kaeo, and Si Sa Ket.
Other nearby provinces where martial law was imposed also saw very high rates of cancellations.
It has also impacted popular island tourist areas.
Tourist visits to Koh Chang were down by up to 30%, and by more than half to Koh Kood.
In Surin, about 80% of group tour hotel bookings were cancelled.
In Buri Ram, 70% were cancelled.
Thapanee said she hoped the current ceasefire would restore tourism confidence.
