That's pushing it. Call out time is 3 hrs from the time you answer your phone to the time you're ready to push. In 3 years I've only been called once and asked "Can you get to the airplane as quick as I can?" The rest of the time they've been assigning me a trip 12+ hrs out. You'll have a good idea if you'll get a trip of not based on the reserve list and open time trips. You can do it no problem if you get Long Call.