Pullman-Moscow Regional Airport — Pullman, United States

Pullman-Moscow Regional Airport, with the code PUW, jointly serves Pullman, Washington, and Moscow, Idaho, two neighboring college towns home to Washington State University and the University of Idaho respectively. PUW's traffic is heavily driven by academic-year travel patterns, with students, faculty, and university visitors making up a large share of passengers on flights typically connecting through Seattle. The airport's binational-sounding name reflects its unusual position straddling a state line to serve a shared university community. Seasonal fluctuations tied to semester schedules and sporting events are a notable feature of PUW's traffic, distinguishing it from airports serving purely commercial or industrial regions.