A Southwest Airways flight to Las Vegas needed to dive to keep away from hitting one other airplane midair … and now a pair flight attendants are nursing accidents.

Passengers on a Friday flight from Burbank to Las Vegas say their pilot needed to dive aggressively to keep away from a midair collision shortly after takeoff … sending passengers flying out of their seats, with some bumping their heads on the cabin ceiling.

Comic Jimmy Dore was on the flight and he says the pilot got here on the PA system and advised passengers his collision warning alert went off and he wanted to keep away from a airplane coming at them.

Southwest Airways tells TMZ … the crew “responded to 2 onboard site visitors alerts Friday afternoon whereas climbing out of Burbank … requiring them to climb and descend to adjust to the alerts.”

The airline says they’re working with the FAA to determine what the hell occurred.

Southwest provides … “No accidents had been instantly reported by Prospects, however two Flight Attendants are being handled for accidents.”

We have seen some lethal airplane crashes just lately all over the world … and it feels like these of us obtained fortunate on their approach to Vegas.