Southwest Airlines and the 10-Minute Turn

The story

Southwest Airlines began flying on June 18, 1971, with three Boeing 737 jets connecting three Texas cities: Dallas, Houston and San Antonio. Its plan was simple: short flights, low fares and friendly service. In September 1971 it bought a fourth 737.

Money ran short fast. By the spring of 1972, the young airline had only $143 in the bank and was facing about $1.6 million in losses. Southwest's president, Lamar Muse, made a hard decision: sell the fourth plane. The sale brought in a profit of about $500,000 and kept the company alive. But it created a new puzzle. How could Southwest keep flying its full schedule, with 14 daily round trips between Dallas and Houston and more to San Antonio, with only three planes?

The answer came from the ground crew. A plane only earns money when it is in the air. If Southwest could get each plane back in the air faster after it landed, three planes could do the work of four. Bill Franklin, the head of ground operations, declared that the team would turn each plane around in 10 minutes. At the time, most airlines took close to an hour. More than 100 tasks had to happen in that window: passengers off, bags out, cabin cleaned, snacks restocked, new bags and passengers on. Teams studied race-car pit crews for ideas. Everyone pitched in, including pilots, and even co-founder Herb Kelleher was known to take out trash and restock peanuts. Passengers chose their own seats instead of having assigned ones, which helped boarding go faster. The crews did not always hit 10 minutes, but they hit it often enough that it became Southwest's signature.

Fast turns became the center of a whole low-cost way of doing business. Southwest flew only one type of plane, the Boeing 737, so every pilot, mechanic and crew member could work on any plane and spare parts were simpler. It flew mostly point-to-point, meaning direct trips between cities rather than sending everyone through a few giant hubs. All of this kept costs low, so fares could stay low, which brought in more customers who might otherwise have driven or stayed home.

The results were remarkable. After its loss in 1972, Southwest made a profit every single year for 47 years in a row, a record almost unheard of in the up-and-down airline business. It grew from three planes into a giant with more than 700 Boeing 737s and tens of thousands of employees. Its turns got longer as planes and rules changed; by 2011 the average was about 25 minutes, which was still among the fastest in the industry.

The streak finally ended in 2020, when the COVID-19 pandemic emptied airports and Southwest lost about $3.5 billion, not counting special items. Then, in December 2022, a winter storm set off a collapse in Southwest's operations that canceled about 16,900 flights and stranded more than 2 million passengers. In a 2023 settlement with the U.S. Department of Transportation, Southwest agreed to a record $140 million civil penalty. Even great systems need to keep improving.

Still, the 10-minute turn remains one of the best stories in business about turning a crisis into a strength. Southwest did not have more money or more planes. It had a team that found a smarter way to use what it had.