Due to popular demand by an overwhelming proportion of its passengers, THAI became a total non-smoking airline in March 1999. If you lose an entire or a partially-used ticket, please contact the nearest THAI office immediately. Refund or replacement of the ticket is at THAI's discretion and requires your presenting proof of loss. In some cases, you may be asked to buy a new ticket and file a claim for a refund later. THAI no longer requires that you reconfirm your flight but please contact THAI to cancel your reservation if your travel plans change.
Many airlines still require reconfirmation.
If your journey includes a portion on another airline you may have to reconfirm onward journeys at least 72 hours before departure. Please cancel your reservation as soon as you intend to change your travel plans. Flight changes or cancellation should be made at least 3 hours prior to flight departure. On domestic services, no-show penalty will be levied if you fail to cancel your booked reservation. Refunds may be granted if a refund application is filed with THAI not more than 30 days after the ticket's expiration date.