Complex sentence: By April of 1968, the airline was operating Boeing 727 service on a routing of Los Angeles-Fresno-San Francisco-Eureka/Arcata routings and also San Francisco-Monterey-Los Angeles and Los Angeles-Fresno-Reno.
Split into simpler sentences: By April of 1968, the airline was operating Boeing 727 service on a routing of Los Angeles-Fresno-San Francisco-Eureka/Arcata. Other routings included San Francisco-Monterey-Los Angeles and Los Angeles-Fresno-Reno.