Best and worst on-time performance at the largest airports in the U.S.

Facilities upgrades, better weather, and fewer flights combined and now U.S. airlines are on pace to post their best year for on-time arrivals. Here is a list of what percent of domestic flights at some of the nation's largest airports arrived on-time in the first six months of 2012:

1: Salt Lake City 89.72

A commuter jet on the tarmac at Salt Lake City airport. Photo by Daniel Betts.

2: Charlotte, N.C. 87.54

3: Minneapolis/St. Paul 87.14

4: Phoenix 86.85

5: Las Vegas 86.67

6: Chicago Midway 86.16

7: Baltimore 86.14

8: Atlanta 85.91

9: Detroit 85.73

10: Portland, Ore. 85.37

11: Tampa, Fla. 85.35

12: Seattle 85.10

13: Orlando, Fla. 84.92

14: San Diego 84.70

15: Denver 84.52

16: New York JFK 84.35

17: Dallas/Fort Worth 84.23

18: Miami 84.21

19: Los Angeles 83.70

20: Fort Lauderdale, Fla. 83.59

21: Washington National 83.18

22: Philadelphia 82.73

23: Boston 82.56

24: Chicago O'Hare 81.91

25: Washington Dulles 81.02

26: New York, LaGuardia 80.32

27: Houston 79.70

28: San Francisco 73.35

29: Newark, N.J. 70.61

Source: Bureau of Transportation Statistics