This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $321 fare is the cheapest current round-trip from Portland (PDX) to BIL on Alaska Airlines flight AS2368, departing 2026-06-19 at 12:13 with return on 2026-06-25. Total flight time is not specified, with non-stop routing.

Clicking "Book this flight" opens Kiwi.com with this exact flight pre-filtered — same airline, same dates, same passenger count. Kiwi aggregates availability across the major GDSs and low-cost carrier inventories, and confirmation is instant once payment clears. Free cancellation typically available within 24 hours under most airline policies.

Prices on this route historically range $273–$546 depending on season, day of week, and booking lead time.