When the bus crashes into the plane at the end, the company logo on the plane is "Pacific Courier." This fictional company name also appears in "Die Hard"--it's on the truck the terrorists show up in (except Karl and Theo, who arrive by car). Jan de Bont, who directed "Speed," was DP on "Die Hard."
In the first scripts, the idea was to make the bus go in circles in the LA Dodger's stadium parking, but the studio couldn't get the rights to film there.
When we first see the bus in the airport you see a plane go over the bus. That scene took 50 takes.
When they show the gap the bus has to jump for the first you see birds fly through the gap. The birds were digitally edited in and the gap was digitally added on to a real bridge.