American airports lag behind their international counterparts when it comes to modern, efficient mass-transit access, according to a new survey released by the Global Gateway Alliance that compares airport access at the world's top 30 busiest airports for passenger traffic. Ranking categories included total travel time, cost, mode of transport, and number of transfers at the world's leading airports. Kennedy Airport in New York tied with Denver for last place. Philadelphia International Airport was not among the 30 airports surveyed. Here are the

Top 10 Rankings for Airport Access

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10. Hong Kong

9. Dallas-Fort Worth

8. (tie) Charles de Gaulle (Paris); Indira Gandhi (Delhi, India); McCarran (Las Vegas); Miami; O'Hare (Chicago); Singapore Changi

7. (tie) Haneda (Tokyo); Kuala Lumpur

6. (tie) Charlotte (N.C.) Douglas; Guangzhou Baiyun (Guangzhou, China)

5. (tie) Phoenix Sky Harbor; San Francisco

4. (tie) Beijing Capital; London Heathrow; Suvarnabhumi (Bangkok)

3. (tie) Hartsfield-Jackson Atlanta; Shanghai Pudong

2. (tie) Amsterdam Schiphol; Dubai; Frankfurt

1. Madrid-Barajas