The 2nd transcontinental airway was established across the country from New York to Los Angeles in mid 1929.. . However, not all the beacons were completed by July 1929. Transcontinental Air Transport (C. Lindbergh) established the route as a plane-and-train service coast-to-coast. They partnered with Pennsylvania and Santa Fe Railroads for night travel where beacons were not ready. Result – coast-to-coast in 48 hrs.

Southwestern blowup view of above graphic.