I had to stay here due to canceled flight, and I think that hotel Meritum provides a very good alternative to nearby airport hotels at Prague airport, for about a third of price (which even includes breakfast). Hotel Meritum is located in Ruzyne, which is moreless a small village on the outskirts of Prague (within the boundaries of Prague), but you still get city bus lines to get to Prague (approx. 35 minutes). Hotel is located about 6 km from PRG airport (under 10 minutes of driving), trip to the center of Prague takes about 20 minutes by car or taxi.
Hotel is pretty basic, with no air conditioning (might be a problem during summer), but it has clearly undergone a renovation and it provides you with decent, clean and quiet place to stay, free parking, free wi-fi and a restaurant across the parking place. I would not recommend this location for longer stay in Prague as the daily commuting would take a lot of your time (unless you are on budget and willing to take this compromise), but for passengers left stranded at the airport hotel Meritum is pure gold and I can only recommend it.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC