The airplane featured was an American Airlines 747-123; the red, white, and blue cheatlines give it away. I am not sure where the "Columbia" name came from, as the picture was released by Universal. The aircraft featured was the sold by the airline and converted to a freighter.
The Trans Global Airways 707 featured in the original Airport was a -349C originally delivered to Flying Tigers (the same airplane played both the roles of the jet involved in the in-flight explosion and the jet stuck in the snow and blocking the runway). That airplane passed through many hands before ending up flying cargo for TransBrasil, in whose hands it crashed in 1989.
The aeroplane has unveiled for us the true face of the earth. -Antoine de Saint-Exupery