Originally Posted by carlosdca

If you check-in online and have only a carry-on, you don't need to be at the airport that early since you can print your bp at the hotel and head straight to security.
Even with a bag, checking in online will save you time at the airport.
Miraflores to Airport mid-day will rarely take more than an hour. I would leave Miraflores at 13:30 the latest if you have to check a bag, 14:00 if no bags.

I would not stay at at airport hotel (Costa del Sol/Wyndham). It is overpriced and I don't see any pros to staying at the airport in this case.