Back in the day, commercial air travel was something like dining at a buffet — the fare covered everything from the Jell-O salad to the vanilla pudding and everyone paid the same no matter how they piled on their plates. Air travel now is increasingly à la carte. The ticket price buys just the entree — transportation from point to point. If you want a salad — or to check a second bag — you pay extra.

Delta Air Lines this week announced it is joining a few other airlines in charging an extra $25 for checking a second bag, adding $50 to the cost of a round-trip ticket starting May 1.

Here is a brief look at the à la carte offerings — from extra legroom to video games — on some domestic flights out of Atlanta's Hartsfield-Jackson International Airport.

Luggage

The first checked bag is free, but the second will cost you $25 on Delta, United and US Airways. Spirit Airlines, a discount carrier with five daily flights out of Atlanta to Fort Lauderdale with connections to the Caribbean and Latin America, hits you for $5 to $10 per bag for all checked luggage. And that's if you pay in advance online. The charge is $10 to $20 at the airport, so you might want to mail the souvenirs home.

Legroom

Extra legroom is yours for a few extra bucks on AirTran Airways and Northwest Airlines. Northwest charges $5-$35 for seats with a bit more room such as those on the emergency exit row. AirTran charges $20 for an exit row seat.

AirTran, under certain conditions, also lets you move up to business class for $40-$80 each way. Spirit has a similar program called Big Front Seat that can cost up to $33.

Lunch

Airline food was never great, but once upon a time it was free.

A chicken bistro salad is now $8 in Delta coach. Other items on the menu developed by celebrity chef Todd English include hummus with vegetables ($7,) and cheddar, turkey bacon and apple butter croissant ($6.) Non-celebrity-chef Pringles are $3.

Spirit Airlines charges $2 for soft drinks.

Leisure

The in-flight magazine is still gratis, but Delta coach customers pay $5 for on-demand movies on airplanes with the new in-seat entertainment systems. A portrait of Lincoln also gets you access to solitaire, poker and 10 other video games.