Does this mean "up to 21 days" before flight or...

[nhrenee]

that the ticket must be purchased no sooner than 21 days before your flight? Sorry for the dumb question!! Tickets must be purchased from 21 days before departure or within one day of reservation, whichever comes first.

 

[Chicago526]

I believe it means you must book at LEAST 21 days prior to departure and within 24 hours of making the reservation, which ever comes first.

This means if you book the ticket exactly 21 days prior to departure, you'd have to buy the ticket by mid-night instead of getting the usual 24 hour hold on it.

Otherwise, if you book it 22 days or MORE prior to travel, you get the full 24 hour hold before you have to buy it.