U.S. News & World Report just released the results of a new survey about airlines in the U.S.

The Airline Quality Ratings looked at factors like on-time performance, mishandled baggage, and customer complaints. And they found that, overall, the "meanest" major airline is... United. United came in last place thanks mostly to its high customer complaint rate. Only Delta had more customer complaints.

Among regional carriers, American Eagle scored the worst due to its high number of mishandled bags and involuntary flight bumpings.

Here are the five worst major airlines in the biz:

5. Delta

4. Continental

3. Frontier

2. American Airlines

1. United Airlines

And the five worst regional airlines are:

5. SkyWest

4. Mesa

3. Comair

2. Atlantic Southeast

1. American Eagle

Here are some of the other "highlights" from the survey:

Highest complaint rate: Delta

Most likely to be unsafe: JetBlue. JetBlue had 17 documented "incidents" out of approximately 219,000 flights in 2010, which is obviously still really safe.

Most likely to overcharge for bags: Delta, US Airways and Continental

Most mishandled bags: American Eagle. American Eagle had the most incidents of mishandled baggage at 7.15 reports per 1,000 passengers. and the highest rate of involuntary denied boardings rate (4.02 per 10,000 passengers).

Most likely to involuntarily bump you: American Eagle. American Eagle had the highest rate of involuntary denied boardings at 4 per 10,000 passengers.

Worst on-time rate: Comair. In 2010, only 73.1% of Comair's flights arrived on time.

At the other end of the spectrum, the five "kindest" airlines are:

5. Southwest

4. Alaska Airlines

3. JetBlue

2. Hawaiian Airlines

1. AirTran