The difference between a four in the afternoon arrival and an eleven at night arrival has very little to do with the flight. It is about what is still open once you have the bag, the rental car and the airport loop behind you. Las Vegas has a reputation for feeding anybody at any hour, and that reputation is earned almost entirely by the Strip and the casino floors. Kitchens in the rest of the valley keep ordinary hours.
A great deal of travel into this city never touches the Boulevard. Passengers arrive for a conference in the southwest, a family visit in the south valley, or a week in a rented house instead of a tower suite. Those trips get planned around departure times and check-in windows. Dinner is the part nobody thinks about until the terminal doors open and everyone in the car is tired.
There is a second variable, which is how far from the airport your bed is. A hotel on the Boulevard puts a hundred kitchens inside a ten minute walk. A rental in the south or southwest valley puts you in a car for anything you want, and the businesses within reach are ordinary neighborhood operations with posted hours, a lunch rush and a closing time. That geography is worth understanding before you land rather than after.
Checking posted hours against your arrival is a two minute job that saves a wasted drive. Smash and Slice, a smash burger and New York-style pizza kitchen with addresses on South Maryland Parkway and South Fort Apache Road, publishes hours of eleven in the morning to nine at night on its own site and takes orders online for each location separately. A seven o'clock landing sits comfortably inside that. A ten o'clock landing does not, and knowing which one you booked is the entire difference.
The same arithmetic applies to ordering rather than sitting. If you land mid evening with a drive still ahead of you, placing the order from the curb is more useful than hunting for a table. Two addresses on opposite sides of the south valley also turns the question into which one is on your route, rather than whether anything is on your route at all.
Departure day runs the other way around. An early flight out of Harry Reid means your last real meal in the city was the night before, while a late morning flight leaves room for lunch if the kitchen opens before you have to return the car. Hours are published and routes are known. Both are worth five minutes of attention while you are still packing.