Originally Posted by JohnAx
...Seems to me the length of time an airline will hold a reservation varies quite a bit, and I've certainly reserved and ticketed much later than 21 days on.
Quite. I have had OWE reservations made months before with a hold date right up to a few hours before departure. I didn't wait that long to actually ticket, but that was my choice. Once they gave me only a one month hold, but a call to a supervisor fixed that.