The website wording has been vague since they added Polaris years ago. Yes, you have access at IAH on your way to SAT if you originate in Europe in business class on UA. The IAH-SAT flight can be in any class of service, just as long as you came over to IAH in business on an international long haul (many IAH-central/south America flights do not qualify). Europe is fine.
-RM
Last edited by RobOnLI; Jan 10, 2023 at 6:30 pm
Reason: grammar