No, I did not make another Airport sequel while filming Slim. I did have two scenes that I filmed featuring an "airport". With TSA regulations the way they are, I decided not to bother asking any actual airport if my no budget movie could film there. Like any no budget filmmaker, I had to improvise. I knew that all I really needed was a nondescript background and a counter for tickets and luggage. A freestanding clothing rack became the metal detector. Sound effects would need to complete the illusion. Physically, the set didn't change much between the two airports, except one had brighter, more direct lighting.
Alissa was not available for filming that day, so instead of rescheduling everybody for another day, you guessed it--we improvised. One of my friends had a gigantic suitcase--so for these scenes, Snarion was traveling inside the suitcase.
The guest star of the day was my friend Katie as the ticket clerk. For the South American airport, she wore a normal business outfit. For the European airport, she simply modified her outfit a little.
Would anyone be able to tell that both airports were the same set? Of course! Does it matter? Of course not!