[Benzgirl]

Passing out bags of pretzels or peanuts? Ok, seriously. You could do a lot with an Airplane Party theme.
If it's informal and you are inviting PNMs, send out "e-tickets". Pass out "boarding passes" as they arrive
Direct people to baggage claim
Have Gate numbers (maybe bumping stations)
Make announcements like the flight attendents do
Have a First Class Meal Service
I think you can buy milar balloons shaped like airplanes. If not, you can get airplane mobiles to hang from the ceiling. Docorate tables with toy airplanes and peanuts
Have "emergency exits" and "laveratories". For a craft, you could make paper airplanes (you can throw them if you want to have fun)
I would definitely dress in uniforms (plain navy skirts, vests, floppy ties and white blouses)
Thank them for flying Delta Airlines.
Maybe go to You Tube for some commercials and jingles: "We love to fly and it shows"