"I THINK" The Incredible Hulk had an airplane episode where Bixby had to land the airplane.
"I THINK" VOYAGERS had an airplane episode and claimed a famous person was on it - a lookalike passed off to viewers claiming to be Jimmy Carter.
"I THINK" Family Matters had Urkel on a plane. I blocked the rest out.
"I THINK" a Boy Meets World episode had Ben Savage and that Tapioca girl and a pilot in a small craft.
"I THINK" Growing Pains had Alan Thicke and Kirk Cameron on an airplane, I don't remember why, but I think the pilot's name was "Captain Kirk" as a joke.
"I THINK" Later, Kirk Cameron and wife Chelsea Noble on WB's "Kirk" series had an episode on a plane because I remember Kirk Cameron doing a fairly decent Captain Kirk impression to her.
"THE WEST WING" - "Angel Maintenance". The Airforce One landing gear won't extend, press secretary CJ Cregg cuts the phone lines to prevent the media from reporting it while President Bartlett wants to land to kill a bill he can only sign in person on the ground. The pilot was Colonel McQueen from "Space: Above & Beyond", James Morrison his name? A number of other episodes had extended scenes on the plane, including the multi-episode arc when Bartlett went to Korea in a wheelchair. Toby Zeigler's first scene in the first episode was on an airplane.
"QUANTUM LEAP" - The Bermuda Triangle episode ENTIRELY takes place on a plane, which of course was stock footage of "Cutter's Goose" from "Tales of the Gold Monkey" series.
It's not a plane, but "Blake's 7" episode "Orbit" was Avon and Vila trapped on a ship too heavy to break orbit and going to crash.
"THE DEAD ZONE" had an episode where Johnny kept getting visions of the plane he and Reverend David Ogden Stiers was on crashing and he couldn't figure out how or why or how to stop it because I think it kept changing.
That Heroes episode where all the super powered people were captured in orange jumpsuits on the plane, I don't remember how much of that took place on the plane before it crashed.
I remember X-Files episode on planes.
"THE OUTER LIMITS". I believe it was Bruce Boxleitner as a Senator and a black woman from the future only he can see and hear kept telling him he was important to history and he was going to die because the plane was going to crash and he had to parachute out.