Magic Kingdom ride reliability

1. 1Walt Disney's Carousel of Progress26d 8h lost · 9 breakdowns · down on 52 of 59 days 21.1%
2. 2Main Street Vehicles16d 7h lost · 57 breakdowns · down on 59 of 59 days 51.7%
3. 3Walt Disney World Railroad - Fantasyland8d 3h lost · 87 breakdowns · down on 59 of 59 days 75.6%
4. 4Tiana's Bayou Adventure4d 15h lost · 57 breakdowns · down on 59 of 59 days 86.3%
5. 5Big Thunder Mountain Railroad4d 5h lost · 55 breakdowns · down on 59 of 59 days 87.5%
6. 6Seven Dwarfs Mine Train4d 0h lost · 69 breakdowns · down on 47 of 59 days 88.2%
7. 7Space Mountain3d 11h lost · 46 breakdowns · down on 40 of 59 days 89.4%
8. 8The Barnstormer2d 22h lost · 64 breakdowns · down on 45 of 59 days 91.3%
9. 9Jungle Cruise2d 16h lost · 47 breakdowns · down on 58 of 59 days 92%
10. 10Astro Orbiter2d 9h lost · 47 breakdowns · down on 35 of 59 days 92.9%
11. 11The Magic Carpets of Aladdin2d 7h lost · 42 breakdowns · down on 58 of 59 days 93.2%
12. 12The Many Adventures of Winnie the Pooh2d 5h lost · 73 breakdowns · down on 41 of 59 days 93.3%
13. 13Pirates of the Caribbean2d 5h lost · 35 breakdowns · down on 58 of 59 days 93.4%
14. 14Dumbo the Flying Elephant2d 4h lost · 43 breakdowns · down on 31 of 59 days 93.5%
15. 15Haunted Mansion2d 0h lost · 20 breakdowns · down on 59 of 59 days 94%
16. 16Tomorrowland Transit Authority PeopleMover1d 20h lost · 44 breakdowns · down on 38 of 59 days 94.5%
17. 17Prince Charming Regal Carrousel1d 6h lost · 56 breakdowns · down on 53 of 59 days 96.2%
18. 18Buzz Lightyear’s Space Ranger Spin1d 5h lost · 23 breakdowns · down on 35 of 59 days 96.3%
19. 19"it's a small world"22h 29m lost · 14 breakdowns · down on 23 of 59 days 97%
20. 20Under the Sea - Journey of The Little Mermaid22h 48m lost · 18 breakdowns · down on 24 of 59 days 97.2%
21. 21TRON Lightcycle / Run20h 42m lost · 29 breakdowns · down on 57 of 59 days 97.5%
22. 22Walt Disney World Railroad - Main Street, U.S.A.12h 37m lost · 5 breakdowns · down on 4 of 59 days 98.4%
23. 23Mad Tea Party9h 49m lost · 26 breakdowns · down on 29 of 59 days 98.8%
24. 24Peter Pan's Flight9h 2m lost · 14 breakdowns · down on 33 of 59 days 98.9%
25. 25Tomorrowland Speedway3h 23m lost · 4 breakdowns · down on 3 of 59 days 99.6%

Breakdowns cluster at 3pm, with 136 of the 954 recorded closures starting in that hour - so the ride you most want is safest earlier in the day, not saved for last. A further 159 rides simply were not running at opening, which is a late start rather than a fault and is counted separately. A further 30 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 6 Aug, when 21.4% of the park's ride hours were lost and 20 of 25 rides went down at some point.