| Los Angeles to Cusco via Lima. Horrible baggage service and terrible follow-up customer service. We booked through United Airlines and flew on United from San Francisco to Los Angeles, then changed airlines to Avian to fly to Lima, then change planes again to fly to Cusco. Our luggage didn't arrive with our flight so we asked why. Avianca baggage service told us United didn't transfer the bags to them on time to make the flight. They told us they'd have the bags brought to our hotel in Cusco later that same day. I called United Airlines baggage service to see why they delayed our bags and they told me that they didn't delay them, they transferred the bags to Avianca within 10 minutes of our flight landing in L.A. and 90 minutes before our Avianca flight departed. Avianca didn't deliver our bags by early evening, so I called baggage service again, after a lengthy wait on hold I was told that our bags hadn't arrived from Los Angeles yet but they would have them delivered to us early the next morning. Next morning, still no luggage so I called again, another lengthy wait on hold, then told that our bags left Lima but they couldn't gat any confirmation that they had arrived in Cusco. Baggage service in Cusco had no idea. We got very stressed out because we were leaving the next day to hike the Inca Trail with no change of clothes or hiking gear, not knowing if our luggage would ever arrive or if we needed to go buy all new clothes and gear. Several phone calls later and more "we don't knows" from Avianca and our bags finally arrived late afternoon of the 2nd day. I had told baggage service I wanted to file a formal complaint. They told be their Customer Service would contact me by Oct. 1st. It's now Oct. 29th and still no one has contacted me. I've called them but they're either closed for the day or no one speaks English and someone will call me soon. Still waiting for that call. Obviously they don't care about their customers.