More restaurants at Hartsfield-Jackson International are taking pre-orders from travelers via an app called Grab.

Atlanta-based Concessions International said it is expanding Grab to restaurants at Hartsfield-Jackson including Fly Burger, Lotta Frutta, Cafe Tazza, Paschal's, Fresh to Order and Dos Equis. Those restaurants are on Concourse B, where Concessions International operates.

September 2, 2015 Atlanta - Capt. Dave Oeser (center) waits for his lunch after placing an order at Fresh to Order inside the Hartsfield Jackson Atlanta International Airport on Wednesday, September 2, 2015. Restaurants inside the airport have challenges including limited space, tethered knives, mandatory knife inventory inspections and electric grills. JONATHAN PHILLIPS / SPECIAL

Credit: Kelly Yamanouchi

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Credit: Kelly Yamanouchi

The Grab app allows travelers to see menus, place orders, pay and set pick-up times, and also has terminal maps.

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Credit: Kelly Yamanouchi

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Credit: Kelly Yamanouchi

Concessions International also has restaurants in airports in Washington, D.C., Denver and Miami that work with Grab.

Other airport concessionaires also use Grab, including Paradies Lagardere and HMSHost. Delaware North also works with the Grab app at Hartsfield-Jackson restaurants Grindhouse Killer Burgers, Jamba Juice, 40/40 Club, Einstein Bros., Subway, Wolfgang Puck, Bojangles and others.