sentences:  In 1980 and 1981, Air Sierra was operating nonstop flights to Fresno with Piper Navajo twin prop aircraft.Also in 1981, Wings West Airlines was operating direct flights to Santa Monica (SMO) and Sacramento (SMF) via an intermediate stop at Mammoth Lakes Yosemite Airport as well as nonstop service to Oakland (OAK) with Cessna 402 twin prop aircraft.In 1983, Mojave Airlines was operating flights to Los Angeles (LAX), San Diego (SAN), Ontario (ONT), Inyokern (IYK) and Fox Field (WJF) in Lancaster with Beechcraft C99 commuter turboprops.