Which flights should you avoid this summer? Here’s a list of the 10 most delayed domestic flights, courtesy of the Transportation Department.

1. Mesa 7124 (Chicago-Mosinee, Wis.)
Late 91 percent of time
Average delay: 37 minutes

2. United 334 (Chicago-Port Columbus, Ohio)
Late 87 percent of time
Average delay: 62 minutes

3. Southwest 1223 (Newark, N.J.-Chicago)
Late 87 percent of time
Average delay: 85 minutes

4. SkyWest 6380 (San Francisco-Boise, ID)
Late 85 percent of time
Average delay: 58 minutes

5. JetBlue 1297 (Boston-Pittsburgh)
Late 85 percent of time
Average delay: 60 minutes

6. Mesa 7155 (Chicago-Springfield, Ill.)
Late 84 percent of time
Average delay: 67 minutes

7. Mesa 7333 (Traverse City, Mich.-Chicago)
Late 83 percent of time
Average delay: 67 minutes

8. Southwest 2565 (Burlington, Vt.-Newark, N.J.)
Late 82 percent of time
Average delay: 66 minutes

9. SkyWest 1989 (Covington, Ky.-Dallas)
Late 82 percent of time
Average delay: 43 minutes

10. American 791 (New York/La Guardia-Dallas)
Late 80 percent of time
Average delay: 66 minutes

Note: the government defines a flight as “delayed” if it arrives 15 or more minutes later than it’s schedule, which is extremely generous. These numbers are from the first quarter of 2008. The full list is here.