United Airlines traces its origins back to the early days of commercial aviation in the United States. It all began in 1926 when Varney Air Lines was established by Walter Varney, an aviation pioneer. Varney Air Lines operated airmail services as part of a contract with the U.S. Postal Service. The inaugural route connected Pasco, Washington, with Elko, Nevada, covering a distance of approximately 400 miles.
Source: https://flyustravels.com/blog/the-evolution-of-commercial-aviation-through-ual-flight-experience/
https://www.yelp.com/biz/qatar-airways-atlanta-3?hrid=3AwQ1737sEKmBZXGr56ZoA&utm_campaign=www_review_share_postreview&utm_medium=copy_link&utm_source=(direct)
https://www.yelp.com/biz/air-france-san-francisco?hrid=ZG8dzGaDxcfdbnUQNWbZ2g&utm_campaign=www_review_share_postreview&utm_medium=copy_link&utm_source=(direct)
https://www.yelp.com/biz/frontier-airlines-chicago-4?hrid=76skg8vFb9kIDswXX_Ag1Q&utm_campaign=www_review_share_postreview&utm_medium=copy_link&utm_source=(direct)
https://support.google.com/admanager/thread/307234014?hl=en&sjid=14243074588135422423-NC
https://support.google.com/admanager/thread/307234014?hl=en&sjid=14243074588135422423-NC
https://support.google.com/admanager/thread/307234014?hl=en&sjid=14243074588135422423-NC
https://support.google.com/admanager/thread/307234014?hl=en&sjid=14243074588135422423-NC
https://support.google.com/business/thread/307233168/%C2%BFc%C3%B3mo-hablar-con-un-agente-de-%F0%9D%94%BC%F0%9D%95%A9pedia?hl=id