I found a couple of old parking tickets from the Ninoy Aquino International Airport. Both are for overnight parking, which shows how cheaper overnight rates were before. The amounts to be paid then were also simpler to calculate since an overnight is automatically computed as either 40 or 300 pesos. Note that the 40-peso overnight fee was for the open parking lots of NAIA T2 and T3. The 300-peso fee was for the multi-level building of T3. I’ll just put these photos here for reference and those throwback moments.
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Caught (up) in traffic 
Hi, may i know if these posted rates are still the same rates today? I’m referring to the open parking right in front of T2 and T3
There’s a more recent post by a NAIA employee about the current rates. Kindly check the other posts about NAIA parking and the comments.
how much now your overnight parking fee?
Please see the other posts and comments for the updated rates.