Manila Airport and Terminals
There are 3 airports. One is the NAIA which is the all international airline airport. So, if you are United, Emirates, etc. Etc. It is Terminal 1.
Second is the PAL airport, Terminal 2.
Third is the Cebu Pacific Airport, Terminal 3.
The NAIA airport or Terminal 1, is a very busy airport. Like some of you have mentioned, there are 3 levels. The first level for departure. Second level for arrival, and right belows arrival through a walkway is the arrival greetings area. The arrival greetings area has lettering system, so go stand under your letter. People who come to wait, greet people at the airport, come to the greeting area and wait across a small street, fenced off from the lettered area, where you would be standing under. So, if someone is coming to the airport to greet you, you would generally find them in the greeting area and NOT in the arrival area. This is a common mistake made by people who are not familiar with NAIA.
Things I have figured out over the years:
1. You can also have people come up to the arrival area, but have them stand at one of the edges as you come out of the arrival door. As you come out of the door of arrival hall to the left or right ends of the area where taxis and buses are. This way, you can see them, tell the security, pull them in, and use the taxi in the arrival area which is safe.
2. Sometime, for newbies it is a scary thing to take taxis from the outside of the airport. If you go to the gteeting area, and you walk and meet someone, you may end up taking taxings from the meeting area. Please do not do this! Most or all taxis from the greeting areas will generally rip you off. Take your "greeter" back in. Tell them you are taking the luxury hotel buses. Then go back to the arrival area and take the white taxi or yellow metered taxi. These are safe. And tell the attendant where you are going, and ask him / her how much the taxi is going to cost.
3. You can also go back in, and go to departure hall. But the savings is not all that great where you have to lug yourself, and your luggage up and flag down taxi in an extremely crowded environment.
4. If you are taking cash out of ATM, there is couple of ATM machines inside the arrival hall. Get your money, stash it away safely, and come out. Keep about 500P handy so you can pay taxi driver until you get to your hotel, or however much it costs.
NAIA is a busy airport. Terminal 3, is also busy, but much more efficient. Just my opinion. Terminal 2 is PAL. And folks, these terminals are not next to each other where you can walk or something. There is NO shuttle bus. You have to take a taxi, and can take sometimes up to 30 to 45 minutes to get from one terminal to another.
For International Departure from NAIA:
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If you are late, do not panic. Have about 1000 pesos ready. Get to the airport, and go to a police officer / security as you get off the taxi. Tell him you need a "short cut". Don't say you are late. Just say you do not want to stand in line. He will tell you how much, and you will by-pass all the lines. I really cannot remember how much I paid, but it wasn't much.
Also, if you are taking Cebu Pacific to an international destination like Hong Kong, it is Terminal 3, and not NAIA (terminal 1).
Always ask your hotel before you leave which terminal your airline flies out of. Never assume. Actually never assume anything in Phillipines.
Be safe.