Transatlantic passengers heading for Miami had a 4-hour flight to nowhere, ending up back in Zurich

A Swiss International Airlines Airbus A340.

Robert Smith/MI News/NurPhoto via Getty Images

• A Swiss International Airlines flight to Miami landed back in Zurich after a four-hour journey.
• The Airbus A340 had "an irregularity with an engine," the airline said.
• The flight changed directions a couple of times over the ocean before circling Zurich for an hour.

Passengers expecting to travel transatlantic ended up on a four-hour flight-to-nowhere.

Swiss International...