My mother flies from PHL to MCO all the time to visit me, I have not flown that route since last year. Her last visit was in July/Aug - drinks, but no snacks provided. I think you can purchase their box lunches (EXPENSIVE). She is usually on a 757 - not overly spacious, but for her traveling alone it is fine. She has had great on time performance - rarely late unless it is weather related - beyond the control of the airline. Her last flight back to PHL in August had to turn back on the runway due to mechanical problem (and she flew out the day all the new restrictions went into place early in the mornng). This is a first for her in over 16 visits in three years. She has always remarked how well they treat her!
I was just looking for flights for her to come down on XMAS Eve, and the flight we had looked at last week was sold out $190 vs $254/$299 now, so I put her on SWA for $143 (inc tax/fees).
In the past, I was always able to get good prices on US Air, as we were usually flexible in her dates.times. She was familiar with the gates, etc at both ends - so there was some comfort level there.... I do always check SW now, since she flew them to Austin and at least is familiar enough with the PHL end.