A THAI Upgrade Award can be used if a paid ticket shows a THAI operated flight number on the international sector that is being upgraded, and if the booking class is eligible for upgrading.
Eligible Booking Classes:
Economy Class: Y / B / M / H / Q
Premium Economy Class: U
Royal Silk Class: C / D / J
Upgrades can be redeemed for member’s own travel or for an Award Nominee and can be requested with THAI reservations worldwide at any time after a paid and eligible ticket has been issued, but not less than 24 hours prior to scheduled departure.
Upgrades are from the original paid fare and booking class as per the THAI Upgrade Award Chart (click here)
* Only international THAI operated flights, TG 3 digit flights, are eligible for upgrading using THAI Upgrade Awards. Promotional fares may not be eligible for upgrading miles. Promotional fares with THAI may not be eligible for upgrading.