7 Safest U.S. Airlines, But Who's Counting?

VIDEO: After a passenger jet ripped open in the sky, officials re-evaluate Boeings 737.

It's easy enough to name the nation's seven safest airlines. It's hard, however, to say what good these lists are if your goal, as a traveler, is to avoid dying.

Consider the case of the passengers on the Southwest flight earlier this month who heard a loud bang and looked up to see daylight coming through the ceiling of their Boeing 737.

If, before belting-in, they had consulted the latest safety rankings, they'd have seen that Southwest's record is exemplary. On an incidents-per-flight basis, Southwest ranks as the safest of the major U.S. carriers and second-safest overall, coming in just behind much smaller, top-ranked AirTran Airways. (Southwest is in the process of acquiring AirTran.)

Knowing Southwest's safety ranking would have availed the passengers on the pop-top flight absolutely zip. That doesn't mean there aren't steps you can take to help ensure your safety in the air—and we'll get to those—only that studying rankings isn't one of them.

"These lists," says Bill Voss, head of the Flight Safety Foundation in Arlington, Virginia, "are effectively meaningless." Why? Death is whimsical. The reaper can reach you randomly. More importantly, says Voss, "the safety record in the U.S. is so good that it's very difficult to find enough accidents or incidents to draw much of a conclusion about who's safest. There aren't enough data points to draw distinctions between the very safe and the extremely safe."

The most popular rankings compare a carrier's number of flights against its number of safety "incidents." As determined by the FAA and NTSB, "incidents" are events that do not meet the aircraft damage or personal injury thresholds of more serious "accidents." For example, a midair collision between a plane and a bird would likely qualify as an incident. A collision in the air between a plane and another plane would be an accident.

For leading U.S. carriers, there are a whole lot of flights, few incidents and even fewer accidents. So, while it's possible to say mathematically that Southwest outranks US Airways, the difference between Southwest's 0.0000203 and US Airways' 0.0000212 is…small. Too small to have real-world significance, it's a splitting of hairs so tiny as to require nano-tweezers.

Rankings Show Airline Safety Record

AirTran, Incidents per flight: 0.0000196

Southwest, Incidents per flight: 0.0000203

US Airways, Incidents per flight: 0.0000212

Continental, Incidents per flight: 0.0000260

Delta, Incidents per flight: 0.0000386

United Airlines, Incidents per flight: 0.0000407

American Airlines, Incidents per flight: 0.0000701

--Source: FAA and NTSB

You'd think that Christopher White, spokesperson for AirTran, would like to do a little boasting about his carrier's safety supremacy, but he, too, emphasizes that the top carriers are interchangeable when it comes to safety. "Everyone is 'safest,'" says White. "Today's aviation system in America is the best in the world. At AirTran, we do have a couple of things going for us: We have an extremely young fleet, the youngest all-Boeing fleet in the U.S. Newer planes give you less to worry about, fewer mechanical issues." AirTran also has scored highly for overall customer satisfaction.

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