| https://travelcostarica.zohodesk.com/portal/en/kb/articles/tienes-dudas-con-telefono-de-united-airlines-el-salvador-asistencia-24-7 |
| https://travelcostarica.zohodesk.com/portal/en/kb/articles/has-probado-telefono-de-united-airlines-el-salvador-asistencia-24-7 |
| https://travelcostarica.zohodesk.com/portal/en/kb/articles/c%C3%B3mo-recibir-asistencia-24-7-con-telefono-united-airlines-el-salvador |
| https://travelcostarica.zohodesk.com/portal/en/kb/articles/has-probado-avianca-el-salvador-telefono-asistencia-24-7-horas |
| https://travelcostarica.zohodesk.com/portal/en/kb/articles/descubre-aeromexico-costa-rica-telefono-disponible-24-7-horas |
