Worst airports: 10. LaGuardia (New York) Worst: 9. Tegel Airport (Berlin) Worst: 8. Bergamo Airport (Italy) Worst: 6. Frankfurt-Hahn Airport (Germany) Paris Beauvais-Tille (France) Worst: 5. Tashkent International (Uzbekistan) Worst: 4. Ninoy Aquino International (Manila) Worst: 3. Tribhuvan International (Kathmandu) Worst: 2. King Abdulaziz Airport (Jeddah) Worst: 1. Islamabad International (Pakistan) World's best: 5. Vancouver International (Canada) Best: 4. Munich International (Germany) Best: 3. Helsinki International (Finland) Best: 2. Incheon International (S. Korea) Best: 1. Singapore Changi International Sleeping in Airports' annual survey highlights world's best and worst airports Airports judged on comfort, conveniences, cleanliness and customer service Singapore named world's best airport for 18th year in a row (CNN) -- Good news for air travelers passing through Manila: the city's international airport isn't quite as bad as it used to be. That's the only slightly uplifting word from The Guide to Sleeping in Airports, a travel website that produces an annual survey to identify the world's worst and best aviation terminals. After being crowned worst three years in a row, Manila's Ninoy Aquino International Airport has this year lost its place at the bottom of the heap to Pakistan's Islamabad Benazir Bhutto International. It's now climbed to the heady position of fourth worst. Despite the website's name, airports weren't just rated according to how easy it is to catch some shuteye. Readers were asked to judge facilities in four categories: comfort, conveniences, cleanliness and customer service. Is Islamabad's Benazir Bhutto International really so bad? Airport officials didn't reply to CNN's requests for a comment, but survey respondents were less than complimentary. "This airport is [like] a central prison," said one who complained of touts and aggressive taxi drivers. The survey ranked Saudi Arabia's busiest airport, Jeddah's King Abdulaziz International as second worst, followed by Nepal's Kathmandu Tribhuvan International. Manila's climb to fourth follows what many respondents said was a "slight improvement" created by the recent opening of its Terminal 3. Three European airports frequented by low-cost carriers were next in line. Paris Beauvais-Tille International Airport and "not-in-Frankfurt" Frankfurt Hahn International Airport tied for sixth. Bergamo Orio al Serio International Airport near Milan was listed as eighth worst. New York City's LaGuardia International Airport, ranked 10th, was the only U.S. entry to make top 10 list. MORE: 18 most annoying things people do in airports The rooftop pool at Singapore Changi Airport. Airport with a spa There were no surprises when it came to naming the best airport, with Singapore's Changi International taking the title it's held every year since the survey began 18 years ago. Its success is credited to the spa, pool, gym, four-story slide and movie theaters that make the airport a destination in itself. Offering almost as many cool perks as its Singapore counterpart, South Korean's Seoul Incheon International was named second best. Amsterdam Schiphol and Hong Kong International Airport (last year's third and fourth best airports) dropped out from the top five to ninth and seventh spots, respectively. Helsinki International Airport, Munich International Airport and Vancouver International Airport wrapped up the top five. READ: And the world's best airline for 2014 is... Worst Airports of 2014 Benazir Bhutto International Airport, Islamabad, Pakistan King Abdulaziz International Airport, Jeddah, Saudi Arabia Tribhuvan International Airport, Kathmandu, Nepal Manila Ninoy Aquino International Airport, Philippines Tashkent International Airport, Uzbekistan Paris Beauvais-Tille Airport, France Frankfurt Hahn Airport, Germany Bergamo Orio al Serio Airport, Italy Tegel Airport, Berlin, Germany LaGuardia Airport, New York City READ: Breathtaking photos of Hong Kong glory days Best Airports of 2014 Changi Airport, Singapore Incheon International Airport, South Korea Helsinki Airport, Finland Munich Airport, Germany Vancouver International Airport, Canada Kuala Lumpur International Airport, Malaysia Hong Kong International Airport, Hong Kong Tokyo Haneda International Airport, Japan Schiphol Amsterdam Airport, Netherlands Zurich Airport, Switzerland MORE: World's most scenic airport approaches