Delta: we get I think 14-15 days off a month. They can’t get give you a trip on your day off, but I think they can extend you into one (never happened to me). I live an hour from Newark and an hour and a half from JFK. Our short-call is promptly available (which everyone agrees is around 2 hours) from the nearest New York airport to your home, regardless of whether or not your airframe flies out of that airport. Short-call is I think a maximum of 6 days a month, no extra pay.
The absolute best deal at Delta is called rolling thunder. If you fly in your off days you get single credit above reserve guarantee PLUS you get your following on call days off. If you don’t have any off days at the end of the month those “pay back” days go into a bank and can be extremely valuable later in the year. If you’re local and flexible you can make a killing to work very little. My best month was 130 credit, 44 block, 9 days worked, month done by the 18th and I sat reserve for exactly zero seconds. The company hates this set up and are trying to get rid of it, but it was never a thing until they decided they didn’t want to staff categories properly.
I’ve bid reserve for the entire 5 years I’ve been here and don’t plan on switching it up.