Even on flights under two hours, United serves some form of meal. Go to USAirways website and look up in flight services.
What type of aircraft? Just a word of warning that domestic first class is not always very special. On a 737, for instance, the seats are slightly wider, and there may be a little more legroom, but not much special.
On United, meals may include: beverages before take off; hot nuts; Asian chicken salad; Trader Vics meals on Hawaii flights; ice cream sundaes with hot fudge sauce
For a true first class experience, the aircraft usually needs to be a 767 or larger. International first class is a considerable difference, with lie flat beds on long haul routes, amenity kits, eye shades, personal entertainment, often massage seats, and even sleeping kits with pyjamas.
A typical first class long haul flight on Lufthansa meal service may be something like: preflight beverage; appetizer and aperatif; entree; dessert and coffee/tea service; midflight snack; breakfast with hot and cold choices. The main meal includes bread and hot buns offered up from a basket. Meals are produced under the direction of renowned chefs. Coffee service includes Lindt chocolates.
The amenity kit includes earplugs, eye shades, and some form of higher end toiletries. There is usually a 'surprise' gift waiting at each seat ie during World Cup we received each some form of collectable soccer themed items.
On landing, one can use the showers in the arrivals lounge.
I fly first a lot with miles or paid, and just want to give you the heads up as you may be envisioning international first class, and don't want you to be disappointed..... you will most likely also have access to the lounge before departure, so that is something to consider. But lounges vary widely as to services offered
If you can list the type of aircraft, I can try and describe it for you.