Flying at 6:30Am form NAIA terminal 1 i am looking for a hotel just a short ride to the airport. Nothing fancy needed, just comfortable to checkout at 4Am.
When I came back I stayed at the Remington Hotel, very nice (but you need to eat out) but I chose because they provide a free shuttle Bus to and from the Airport which is about a 10 minute ride away and was very convenient for me...
My adult daughter and an aunt wanted a place that was close to the airport and the Mall of Asia so I booked them at the Red Planet Aseana last year. They said it was no-frills but clean and a pretty good value. Red Planet Aseana City, Manila - UPDATED 2017 Hotel Reviews & Price Comparison (Metro Manila/Paranaque, Philippines) - TripAdvisor
The Kabayan Hotel in Pasay is another nice place to stay. Next to the LRT/MRT station and near to mall of asia.
Perfect for first timers to and from NAIA. If my memory is right, their shuttle bus runs 24 hours and very easy to spot. My daughter liked it, though a bit pricey when your purpose is just to catch an early flight. We saw the new airport branch of Go Hotels recently btw.