I have a flight early in the morning, and I'm planning to reach the airport around 11 PM without having had dinner. Are there any food places at the airport that still serve meals at that time?
At Keflavík, there are scheduled arrivals and departures as late as 2AM. The tax free shop is open 24h, but it is difficult to find the opening hours for the other shops, cafés and restaurants. At least Kaffitár, a coffee shop, is open until 1AM and serves snacks and light meals.