what places close enough to walk are available to eat?
The hotel next to the Comfort Suites (Days Inn) has a great Cafe that will deliver to your room. Or you can dine in at the cafe.
Fritanga Monimbo when you turn left to NW 36th street has good food
We walked to Mc Donald's twice and to Subway once. The Subway we went to was NOT in a gas station. I would not walk at night as it is not a good area. There were plenty of delivery options and I think when we go again, we would take advantage of that.
We ate at a place in the opposite direction from Subway. It was a essentially a bar with loud Spanish music on the jukebox. Food was Cuban but after the long flight I was not in the mood to eat at a bar. Next time I passed through I ate at the airport. There are quite a few good restaurants there.
When you get to NW 36st Make a left. 10-15 mins walk will get you to Burger King & Pollo Tropical
We walked to McD's. Wouldn't walk in dark though. As before, plenty of menus in room.
There is Chinese restaurant (Ping House I think) on NW36st street very close to the hotel. Also Tom's NFL, a sports bar and McDonalds. In the other direction, keeping the airport on your left, in about 1/2 mile is Denny's and a Miami Subs.
We had Subway in our room, however you can sit down at Subway to eat. There are also a number of budget places to eat if you turn left when leaving the hotel. The all looked clean and only a 5 min walk.
The hotel had a number of food menus in the room of places that deliver. The Chinese food place nearby was very good and no delivery fee. It's not an area I'd want to take the kids out at night though which is why delivery was a good option.
Get an answer from Comfort Suites Miami Airport North staff and past guests.