An airport worker was run over by a vehicle on the tarmac at LaGuardia Airport Sunday morning — as startled jetsetters watched the aftermath out of their plane windows.

Passengers waited on a Delta jet for an hour as paramedics and police converged on the scene of the accident, which they were told was a “critical situation,” one flyer told The Post.

“People were shocked by the incident,” said Joseph Rotella, who tweeted photos as the situation unfolded.

“It’s such a fluke thing — we can’t move the plane because someone got hit behind it.”

A driver backed a “tug” — one of the little cars that pull planes around — into the Delta employee at around 10:15 a.m., injuring his leg, Port Authority police said.

Emergency responders eventually took the injured man to Elmhurst Hospital, but his wounds weren’t serious, a spokesman for the agency said.

But it didn’t look that way to passengers as the injured worker was immobilized on the ground and then carried into the ambulance on a stretcher, Rotella said.

“Nobody ever really said he was fine,” he said.

To make matters worse, the delayed flyers’ plane’s auxiliary power was busted, so they were without air conditioning and baking in “brutal” heat as they waited for their flight to Vermont to take off, Rotella added.