Restaurants aren't the only business that charge a la carte. Low-cost carriers may have started the add-on fees, but now other airlines are charging passengers extra for everything from carry-on bags to more leg room.
Now Delta has partnered with Amazon.com to offer Internet access in the air. It's currently free, but it won't be for long.
As the cost of a ticket continues to rise, airlines are also figuring out "what else" they can charge you for while you're held captive at 30,000 feet.
"The travelers are realizing they're going to pay for those things. They want to pay upfront. It's not something they're going to revolt against because if they have to travel, they have to travel," Kay Parrott with AAA Travel said.
Right now, Delta is letting fliers get online for free, but the airline plans to charge about $18 for unlimited WiFi access. Delta actually made the most from add-on fees in the third quarter of last year--some $814 million.
"It's one of those, they get you hooked on it and then you realize, 'I kind of like doing this,' and okay, now we're going to charge you for it," Parrott said.
"Would I pay for Internet access? Probably not. They've upped the prices on the boarding; you have to pay for snacks, all this other stuff. It's just another fee they want to add on and I don't think we should have to pay it. They make enough money on everything else; all the other add-ons. I think they should allow for free Internet," passenger Anthony Halverson said.
"I found out they charge. It's not worth my while to sign on. I'll wait until I get to my destination," passenger Lois Wagh said.
But some passengers are willing to put up with the extra fees.
"Do you think it's fair to passengers how airlines are trying to make extra money? Sure. It's called business. This is not Obama care. Everything is not free," passenger Fred Stinger said.
Others question what else the airlines will come up with to charge them for next.
"Whatever people will put up with. At one point, there was an airline in the UK that was talking about charging for using the restroom. It could happen. I hope not, but it could happen," Parrott said.
While some discount airlines already charge for carry-ons, other airlines are thinking of imposing a $25 fee for people who bring oversized carry-on bags on the plane.