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There are a lot of things that can cause a flight to get diverted.

And for the most part, they’re all pretty understandable.

The blunder wasn’t discovered until about two hours into the flight over the Pacific Ocean.

pilot checks the plane before take off

A commercial airline pilot speaks into his headset before takeoff.Credit:zeljkosantrac/Getty Images

The pilot did not have their passport onboard, United said in a statement shared to multiple media outlets.

We arranged for a new crew to take our customers to their destination that evening.

Customers were provided with meal vouchers and compensation.

Which is exactly what happened here.