Trying to piece together a JFK/EWR -> PNH itinerary in Business on with a connection in Europe on Thai (e.g. JFK-ZRH-BKK-PNH or EWR-BRU-BKK-PNH), where the last two flights are on TG for late December of this year (e.g. December 25/26). United.com, expertflyer and Aeroplan all show TG availability but I'm getting the "THE ITINERARY YOU REQUESTED IS NOT AVAILABLE
We're sorry, but due to real-time availability, the itinerary you requested is no longer available." error message.
Anyone have more context on this? FWIW, it seems specifically that the Europe->BKK routing doesn't seem to be available. Searching an October flight that goes JFK-ICN-BKK-PNH works, for example.