For San Salvador-Mexico City flights, you can use El Salvador Intl. - Saint Oscar Arnulfo Romero y Galdamez Airport, Ilopango Airport as departure airport, and Atizapan - Jorge Jimenez Cantu National Airport, Mexico City Intl. Airport, Felipe Angeles Intl. - Santa Lucia Airport, Toluca Intl. - Licenciado Adolfo Lopez Mateos Intl. Airport for arrival.