Certainly, using a food delivery service like GrabFood to order food at the airport can be a convenient option while traveling. Grab is a popular platform in various countries that offers not only ride-hailing services but also food delivery.

Here's how you might use Grab to order food at the airport:

1. Download the Grab App: Make sure you have the Grab app installed on your smartphone. You can download it from the App Store (for iOS devices) or Google Play Store (for Android devices).

2. Create an Account: If you don't already have a Grab account, you'll need to create one. This usually involves providing some basic information and linking a payment method to your account.

3. Enter the Airport Location: Open the Grab app and enter the location of the airport. The app may have specific options for airport locations.

4. Browse Restaurants: Explore the list of available restaurants within the airport or in the surrounding area. GrabFood typically partners with various restaurants to offer a variety of cuisines.

5. Place Your Order: Select the restaurant you'd like to order from, browse the menu, and add items to your cart. Once you've made your selections, proceed to checkout.

6. Payment: Confirm your order and provide payment details. Grab usually accepts various payment methods, including credit/debit cards and digital wallets.

7. Delivery to Your Location: Enter your specific location within the airport, such as the terminal and gate number. Once your order is confirmed, a delivery driver will bring the food to you.

Using Grab to order food can be especially convenient if you have a layover or if you prefer not to leave the airport premises. However, it's essential to check if the airport allows food deliveries and if there are any specific guidelines you need to follow. Additionally, be mindful of the time it takes for the food to be prepared and delivered, considering your departure or boarding schedule.