Upgrade Awards on THAI
This Award is valid if your paid ticket shows a THAI operating flight number on the sector that is being upgraded, and if the booking class is eligible for upgrading.
Codeshare flight numbers with other airlines that are THAI or partner operated are not eligible for upgrading using miles.
Mileage Upgrades are closely linked to the original paid fare. With a paid Economy Class ticket in Y/B/M booking classes the least number of miles are required for upgrading which is automatically to Royal Silk Class.
With a paid Economy Class ticket in other stipulated booking classes, the number of miles determines upgrading to Premium Economy Class or Royal Silk Class.
With a paid Premium Economy Class ticket upgrades are to Royal Silk Class, while upgrades from Royal Silk Class take you to the luxurious comfort of Royal First Class.
Mileage Upgrade Awards can be requested at anytime after your paid ticket has been issued, but not less than 24 hours prior to your scheduled departure.
Treat yourself soon or one of your Award Nominees, with a Mileage Upgrade on THAI.