Pitiur Airstrip (ICAO: SEIU) is a small, uncontrolled airstrip located in the Pitiur area of Ecuador. It serves as a vital access point for remote communities in the region, supporting light general aviation and humanitarian or missionary flight operations. Due to its remote location, the airstrip primarily handles small propeller-driven aircraft and plays an important logistical role for communities that lack adequate road infrastructure. It is not served by scheduled commercial airlines.