Atlanta

The crew of Delta Air Lines Flight 55 last Thursday couldn't legally fly from Lagos, Nigeria, to Atlanta unless they waited a day due to new limits on how much pilots can fly in a rolling 28-day period. The trip would have to be canceled.

Instead, Delta headquarters told the captain to fly to San Juan, Puerto Rico, which they could reach within their duty limits. There, two new pilots would be waiting to take the Boeing 767 on to Atlanta. The plane arrived in San Juan at 2:44 a.m., quickly took on fuel and pilots, and landed in Atlanta only 40 minutes late.

The episode, unorthodox in the airline industry, illustrates the fanaticism Delta now has for avoiding cancellations. Last year, Delta canceled just 0.3% of its flights, according to flight-tracking service FlightStats.com. That was twice as good as the next-best airlines, Southwest and Alaska, and five times better than the industry average of 1.7%.

On 72 days last year, Delta didn't cancel a single one of its 2,500 flights. "We're posting numbers that we've never seen in our industry,'' said Delta President Edward Bastian in an interview.