Originally Posted by
sbm12
The GDS tools that all carriers use to indicate seats for sale are single-digit tools. So they max out at 9 (4 in some cases). You won't know how many more than 9 there are from those systems. And carriers are loathe to give out that data as they generally consider it secret/proprietary/whatever.
I often fly jetBlue non-revenue and have never been bumped because of checking the status of flights before listing. The best site I know of for this is Flightstats.com under "Flight Availability".
As SBM12 indicated, jetBlue shows up with a maximum of 4 seats at anytime. When I really want to make a flight I try to use both JetBlue.com's seatmap and flightstats.com. If flightstats says no flights available, I don't even bother listing.
jetBlue is extremely nice to standby flyers and have always been extremely honest with me when I call to list. They'll tell me my chances and sometimes if I get a nice manager he/she just assign me a seat if the flight is empty (almost always an exit row seat).
I know this is a little off topic but if you are listing for Revenue/Non Revenue travel jetBlue lets you call up to a month (maybe more?) in advance to list.
In my opinion jetBlue is the best airline to fly non-revenue/interline on (no I don't work for jetBlue).