Originally Posted by
JacksonFlyer
the changes are minimal, however you are right..that is a hard connection. You need to call in.
No, it's a connection that is below MCT and can't be made, and the itinerary needs to be fixed; MCT at SEA isn't 5 minutes. The doors on the other plane would already be closed by the time OP's plane pulled up at the gate.
Agree that OP should call in though. Should be able to ask for a refund given that there's no same day itinerary. "Trip in vain" are the magic words to use here.