New York LaGuardia Is North America's Least Favorite Airport

America's most-hated big-city airport is New York LaGuardia — and it's not even close.

That's the verdict from J.D. Power, which on Thursday released its 2016 North America Airport Satisfaction Study. Travelers hated LaGuardia even more this year than last.

The reason? The Port Authority of New York and New Jersey, which operates the airport, is spending $8 billion to construct a new, modern facility. Travelers will begin to see benefits by 2018, though it will take at least four more years before the project is substantially completed. For now, though, LaGuardia is not a pleasant experience for anyone. Travelers are not just complaining about the usual issues — like overcrowded terminals and underwhelming concessions — but they also gripe about construction-related woes.

The top four larger airports on J.D. Power's remain the same as in 2015, with travelers preferring Portland, Oregon, Tampa, Las Vegas, and Orlando. But the fifth airport, Miami International, made a major jump, up from 18th last year. It's not fully clear why Miami jumped so many spots, but J.D. Power credited Miami for improving its concessions.

The J.D. Power study, now in its 11th year, asked travelers for their opinions on six factors, including terminal facilities, security screening, baggage claim, food and retail. The company conducted its survey from January-October and received 36,465 usable responses.

While travelers are losing patience with LaGuardia, and nearby Newark Liberty International, which finished second-to-last, they are being increasing satisfied by U.S. airports, according to the study.

J.D. Power ranks airports on a 1,000 point scale, and this year's average of 731 was a six-point increase from 2015. Travelers seem most happy about improved food, beverage, and shopping options at airports, according to the study.

The survey also ranked medium-sized airports. In the medium category, travelers preferred Indianapolis, Buffalo, and Southwest Florida International Airport in Fort Myers, while they disliked airports in Maui, Hartford, and Cleveland.

Here is the full list.