Search nearby San Francisco or Los Angeles area airports When lower fares are sold out at one airport, they may be available at another. Sometimes a roundtrip itinerary is priced less than two one-way trips. Sometimes a lower fare is available if you stay over a Saturday night. Make holiday plans early Holidays and school vacations are generally the highest demand travel times. The earlier you plan, the better your chance of finding the lowest fare.
Some people plan six months in advance.