The Howard W. Cannon Aviation Museum is a very nice free museum. There are lots of historical items on display. This area is located in Terminal 1 on the Esplenade which is outside of security. If you are on a connecting at McCarran you are allowed to exit security and re-enter security as long as you have a valid boarding pass for that day. There are more items on display throughout the airport.
If you're in McCarran airport and have some time to spare, this baby museum is packed with tons of Las Vegas aviation history. The displays are educational and each one is packed with lots of reading to keep you busy. The visuals included pilot uniforms, airport and airplane parts artifacts, tons of vintage black and white aviation pictures. This is a nice little stop if you have about 15-30 minutes to spare. The readings are definitely more interesting than the displays themself. The C & D gate TSA entrances are close by and can be seen from the museum. It's definitely worth checking out once if you're in the McCarran airport. Safe travels!
Museum? If this is a museum, then every plaque on the side of the road is now a national park. This is a small aviation history display that you can easily miss even if you're careful. I actually missed it, and when this popped up on maps I thought "How did I miss a whole museum at the airport?". Turns out I hadn't. I'd walked by it twice. There are a few panels talking about aviation history and whatnot. Theres also a small static display of a plane hung up off the edge of the railing nearby. Woooooo... I could barely contain my excitement. It's totally free at least. Unless you paid for parking, in which case, they gotcha.
This was a pretty cool place to visit while waiting for a flight. There are instillations scattered throughout the airport, but the main one is before security near terminals a, b, and c. It tells the story is Nevada's aviation and the history of the Las Vegas airport.
Great place for learning about Vegas airport. It is not look like it does on the app it's a small display of old fashioned features.