Passengers aboard a Southwest Airline jet that took a dramatic plunge to avoid an oncoming aircraft were told by the pilot that they nearly struck another plane before landing safely in Las Vegas. The Boeing 737 jet dropped hundreds of feet in a little over 30 seconds during a flight on Friday, according to a flight tracking website.

A Southwest Airlines flight dropped several hundred feet in a matter of seconds to avoid a midair collision, after the Federal Aviation Administration said pilots were alerted to another aircraft's presence in the area.

The Southwest flight 1496 to Las Vegas swiftly descended to avoid a midair collision after takeoff from Burbank.