Magic Kingdom ride reliability

1. 1Main Street Vehicles13d 3h lost · 58 breakdowns · down on 60 of 60 days 59.1%
2. 2Walt Disney World Railroad - Fantasyland9d 4h lost · 87 breakdowns · down on 60 of 60 days 69.8%
3. 3Walt Disney World Railroad - Main Street, U.S.A.7d 6h lost · 68 breakdowns · down on 45 of 60 days 75.8%
4. 4Big Thunder Mountain Railroad3d 23h lost · 55 breakdowns · down on 60 of 60 days 87%
5. 5Tiana's Bayou Adventure3d 19h lost · 58 breakdowns · down on 60 of 60 days 87.5%
6. 6Seven Dwarfs Mine Train3d 9h lost · 63 breakdowns · down on 52 of 60 days 89%
7. 7Jungle Cruise2d 17h lost · 47 breakdowns · down on 60 of 60 days 90.8%
8. 8Astro Orbiter2d 13h lost · 48 breakdowns · down on 37 of 60 days 91.8%
9. 9Space Mountain2d 12h lost · 36 breakdowns · down on 33 of 60 days 91.8%
10. 10The Barnstormer2d 12h lost · 57 breakdowns · down on 40 of 60 days 91.9%
11. 11The Magic Carpets of Aladdin2d 6h lost · 43 breakdowns · down on 60 of 60 days 92.6%
12. 12The Many Adventures of Winnie the Pooh2d 0h lost · 64 breakdowns · down on 40 of 60 days 93.5%
13. 13Dumbo the Flying Elephant1d 22h lost · 41 breakdowns · down on 31 of 60 days 93.7%
14. 14Tomorrowland Transit Authority PeopleMover1d 17h lost · 37 breakdowns · down on 36 of 60 days 94.6%
15. 15Tomorrowland Speedway1d 14h lost · 31 breakdowns · down on 26 of 60 days 94.7%
16. 16Buzz Lightyear’s Space Ranger Spin1d 5h lost · 27 breakdowns · down on 29 of 60 days 96.1%
17. 17Pirates of the Caribbean1d 3h lost · 19 breakdowns · down on 60 of 60 days 96.1%
18. 18Peter Pan's Flight23h 10m lost · 12 breakdowns · down on 23 of 60 days 96.8%
19. 19Prince Charming Regal Carrousel1d 1h lost · 43 breakdowns · down on 45 of 60 days 96.9%
20. 20TRON Lightcycle / Run20h 22m lost · 20 breakdowns · down on 59 of 60 days 96.9%
21. 21Haunted Mansion21h 36m lost · 11 breakdowns · down on 60 of 60 days 97.1%
22. 22Under the Sea - Journey of The Little Mermaid14h 21m lost · 12 breakdowns · down on 24 of 60 days 98.2%
23. 23"it's a small world"13h 6m lost · 7 breakdowns · down on 14 of 60 days 98.2%
24. 24Mad Tea Party7h 37m lost · 12 breakdowns · down on 24 of 60 days 98.9%

Breakdowns cluster at 3pm, with 168 of the 935 closures that started before the park's final hour beginning then - so the ride you most want is safest earlier in the day, not saved for last. A further 199 rides simply were not running at opening, which is a late start rather than a fault and is counted separately. The other 21 closures start in the 10pm hour, when the park is shutting - those are rides finishing their day, not failing, so they are left out here.

The worst day in this window was 23 Aug, when 26.3% of the park's ride hours were lost and 19 of 25 rides went down at some point.