Magic Kingdom ride reliability

1. 1Walt Disney World Railroad - Fantasyland12d 4h lost · 76 breakdowns · down on 60 of 60 days 58.5%
2. 2Walt Disney World Railroad - Main Street, U.S.A.11d 12h lost · 68 breakdowns · down on 54 of 60 days 60.8%
3. 3Main Street Vehicles12d 6h lost · 58 breakdowns · down on 60 of 60 days 61%
4. 4Big Thunder Mountain Railroad4d 1h lost · 52 breakdowns · down on 60 of 60 days 86.6%
5. 5Tiana's Bayou Adventure3d 8h lost · 53 breakdowns · down on 60 of 60 days 88.8%
6. 6Seven Dwarfs Mine Train2d 23h lost · 57 breakdowns · down on 49 of 60 days 90.2%
7. 7Jungle Cruise2d 10h lost · 47 breakdowns · down on 60 of 60 days 91.7%
8. 8Astro Orbiter2d 3h lost · 45 breakdowns · down on 36 of 60 days 92.9%
9. 9The Barnstormer2d 1h lost · 50 breakdowns · down on 36 of 60 days 93.1%
10. 10The Magic Carpets of Aladdin1d 21h lost · 38 breakdowns · down on 60 of 60 days 93.6%
11. 11The Many Adventures of Winnie the Pooh1d 22h lost · 61 breakdowns · down on 40 of 60 days 93.7%
12. 12Tomorrowland Speedway1d 15h lost · 34 breakdowns · down on 29 of 60 days 94.5%
13. 13Space Mountain1d 14h lost · 31 breakdowns · down on 29 of 60 days 94.7%
14. 14Dumbo the Flying Elephant1d 14h lost · 37 breakdowns · down on 28 of 60 days 94.7%
15. 15Tomorrowland Transit Authority PeopleMover1d 11h lost · 31 breakdowns · down on 33 of 60 days 95.1%
16. 16Pirates of the Caribbean1d 7h lost · 23 breakdowns · down on 60 of 60 days 95.2%
17. 17Peter Pan's Flight1d 1h lost · 15 breakdowns · down on 25 of 60 days 96.5%
18. 18TRON Lightcycle / Run21h 47m lost · 21 breakdowns · down on 58 of 60 days 96.6%
19. 19Buzz Lightyear’s Space Ranger Spin23h 37m lost · 27 breakdowns · down on 30 of 60 days 96.7%
20. 20Haunted Mansion22h 53m lost · 15 breakdowns · down on 60 of 60 days 96.8%
21. 21Prince Charming Regal Carrousel1d 0h lost · 42 breakdowns · down on 44 of 60 days 96.9%
22. 22Under the Sea - Journey of The Little Mermaid9h 18m lost · 10 breakdowns · down on 23 of 60 days 98.8%
23. 23"it's a small world"8h 19m lost · 6 breakdowns · down on 11 of 60 days 99%
24. 24Mad Tea Party7h 10m lost · 12 breakdowns · down on 23 of 60 days 99%

Breakdowns cluster at 4pm, with 163 of the 895 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 223 rides simply were not running at opening, which is a late start rather than a fault and is counted separately. The other 14 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.