United has round-trip flights from Austin (AUS) to Portland (PDX) for $140-$144 with a connection. Flights March to April. No Sunday departures. Origin/Destination reversible.
Note: Not a lot of dates available here, but the weekend of April 12th is open.
Note: United “Basic Economy” fares do not include a free carry-on bag. Only a personal item (like a small laptop bag) is free. Seats are randomly assigned for free prior to boarding. If you have the United MileagePlus credit-card, use the “free checked bag” perk.Note: The personal item size on United flights is smaller (9-in/10-in/17-in) than Frontier or Spirit (8-in/14-in/18-in).