NAIA (Ninoy Aquino International Airport) as 'worst' airport again.

YAHOO PH - Manila's Ninoy Aquino International Airport (NAIA) Terminal 1 has just been voted, again, as among the world's worst airport in a reader poll.

According to travel website The Guide to Sleeping in Airports, NAIA tops the 2011 list of the world's least favorite when it comes to safety concerns, comfort, and facilities.

Manila's NAIA Terminal 1 also topped the list for Asia's worst in 2010.

"Forget about sleeping in this airport! You will not want to even close your eyes here! Bribery and theft exists," the travel site said, alongside contributed photos of the airport.

"Airport taxes are collected, but the money does not seem to go towards the betterment of the airport," it added.

The site said poll results are determined by the following: "site visitor votes; reviews submitted to the site over the past year; and information provided by airports regarding their facilities."

Users cited different concerns such as safety, airport staff attitude, the availability of comfortable seating, the state of the facilities, and poor access for people with long layovers.

The Guide to Sleeping in Airports also pointed out drawbacks such as the lack of luggage counters and pay-in lounges for transit passengers.

It also lamented that NAIA prohibits travelers from entering the airport premises three hours before their flight, a claim denied by a staff from the Manila International Airport office.

The site also mentioned a ceiling collapse incident earlier this year.

But if NAIA had "plus" points, it would be it's Free Public WiFi, and it's Terminal 3 being “clean” and “spacious,” although reportedly "structurally flawed."

Other "worst" airports in the list include Paris Beauvais Airport, Keflavik Airport, Bergamo Orio al Serio Airport, Kiev Airport, Frankfurt Hahn Airport, London Luton Airport, Pisa Airport, Paris CDG Airport and the Los Angeles Airport.

Singapore's Changi Airport meanwhile tops the list of the world's best with its modern amenities and wonderful restaurants. It was also praised for making the airport "fun."