Https://mechatronics.ucmerced.edu/sites/g/files/ufvvjh1226/f/webform/support-how-early-is-it-to-get-a-delta-airlines-boarding-pass.pdf https://mechatronics.ucmerced.edu/sites/g/files/ufvvjh1226/f/webform/support-how-early-is-it-to-get-a-delta-airlines-boarding-pass.pdf