Airports feared losing revenue to Uber and Lyft. Here's what happened.

Airport officials were understandably nervous when Uber and Lyft drivers began pulling up at terminals across the country a few years ago.

After all, more fliers using the relatively cheap ride-hailing services could mean that fewer would pay for airport parking and rental car services - two significant sources of airport revenue.

"At the time, all we knew was there was some uncertainty around it," said Ryan Yakubik, deputy executive director and chief financial officer at Los Angeles International Airport.

But a look at Southern California airport budgets shows that the move to let ride-hailing services pick up and drop off passengers - and pay a fee to do it - was not the financial disaster some had feared.

Technology-amped, gig-economy start-ups have disrupted many industries in the last decade but