There's no shortcut for this one, and that's precisely what makes it interesting: business class from San Antonio to Timisoara requires at least one, often two connections, since no US carrier or European partner threads this route directly. The realistic total transit time runs well beyond the advertised 11.5-hour flight time once you factor in a hub stop, and having flown this corridor via multiple routings, I can say the Frankfurt or Munich connection on Lufthansa is the most reliable choice, particularly now that Lufthansa Allegris is rolling out on select long-haul aircraft with proper closing doors and a genuinely private suite feel — though you'll want to confirm the aircraft type before booking, as Allegris isn't yet fleet-wide. Turkish Airlines via Istanbul is the other strong contender, and its Istanbul Airport lounge remains one of the most lavish in the world, worth arriving early just to experience. TAROM (RO) does operate the Timisoara leg regionally from Bucharest, so a Lufthansa or Turkish long-haul segment paired with a TAROM regional hop into TSR is often the final piece of the puzzle.
San Antonio International only recently expanded its international connectivity, so most itineraries will route you through Houston, Dallas, or a US East Coast gateway before crossing the Atlantic — I'd recommend building in a two-hour minimum connection window given SAT's smaller-scale customs and security flow compared to hub airports. My insider tip: book the westbound return leg with extra buffer in Munich or Istanbul, since winter weather delays in Central Europe can cascade quickly, and Turkish Airlines' rebooking desk in Istanbul is noticeably faster than calling a US reservations line.
January through March and again in October and November are consistently the softest months for premium fares on this Europe-bound corridor, as Romanian business travel demand dips outside conference season. Given the routing complexity and the way award and paid fares fluctuate across three different carriers and alliances, this is exactly the kind of route where setting up automated fare alerts pays off — letting the deal come to you rather than chasing it manually across multiple airline sites.