Happy birthday to both of you!
Airline travel has changed quite a bit between 9/11 and technology advances.
* Read up on the luggage requirements for the airline you are using, and pack lightly.
* If you plan to carry on your bags, read up on the size of containers that hold liquid. They will need to be put in a clear bag and put into a bin at the security screening check.
* Getting through security can take a lot of time, but not always. Get to the airport early enough to do it without stressing, and be prepared to entertain yourselves should you end up with a good deal of time once you get through.
* Most security checkpoints make you take off your shoes and put them in a bin for x-ray, so wear socks (with no holes in them). They often make you take off a jacket and sometimes a sweater as well, so make sure that whatever you have on underneath is something you don’t mind having viewed in public. Sometimes, you have to also take off a belt and other metal items (hair clip, bulky watch, etc.)
* Don’t worry if security pulls you aside for a search. They do it if there is anything questionable or just randomly. It’s very common.
* On the plane, overhead bin space has become prime real estate. If you have a carry-on bag that won’t fit under the seat in front of you, you might consider getting a tag at the gate counter and checking the bag right before you board the plane. You’ll get it back once the plane lands, and you can buy-pass waiting in baggage claim.
* Meals on planes are a thing of the past, unless the flight is ~4 hours or more. If you can, eat before you leave home. Food/snacks are plentiful at the airport, but the prices are outrageous.
Have a wonderful time in Vegas!