United sells its tickets on all major third party United Airlines telefono and OTAs such as Expedia or Orbitz even do a decent job of pointing out United’s Basic Economy restrictions. For international flights, you’ll often see United and other Star Alliance partner flights available for lower fares on some obscure third-party websites, Faredepot, JustFly, among many others.
https://www.i-customerservicenumber.com/united-airlines-telefono-espenol/
