| Llanidloes Windsor Locks | Eastern Time | 05:00 |
| Llanidloes Plainsboro Center | Eastern Time | 05:00 |
| Llanidloes Placerville | Pacific Time | 08:00 |
| Llanidloes Plaffeien | Central European Time | -01:00 |
| Llanidloes Pittsford | Eastern Time | 05:00 |
| Llanidloes Pismo Beach | Pacific Time | 08:00 |
| Llanidloes Pittsboro | Eastern Time | 05:00 |
| Llanidloes Pitlochry | United Kingdom Time | 00:00 |
| Llanidloes Pithari | Eastern European Time | -02:00 |
| Llanidloes Oberbüren | Central European Time | -01:00 |
| Llanidloes Oberkorn | Central European Time | -01:00 |
| Llanidloes Oberlin | Eastern Time | 05:00 |
| Llanidloes Obernberg am Brenner | Central European Time | -01:00 |
| Llanidloes Oberstaufen | Central European Time | -01:00 |
| Llanidloes Obertrubach | Central European Time | -01:00 |
| Llanidloes Oberhausen-Rheinhausen | Central European Time | -01:00 |
| Llanidloes Oberwesel | Central European Time | -01:00 |
| Llanidloes Oak Bluffs | Eastern Time | 05:00 |
| Llanidloes Oak Brook | Central Time | 06:00 |
| Llanidloes Oak Park Heights | Central Time | 06:00 |
| Llanidloes Oak Hill | Eastern Time | 05:00 |
| Llanidloes Oak Island | Eastern Time | 05:00 |
| Llanidloes Oaxaca | Central Time | 06:00 |
| Llanidloes Oamaru | New Zealand Time | -11:00 |
| Llanidloes Oakdale | United Kingdom Time | 00:00 |
| Llanidloes Oakdale | Pacific Time | 08:00 |
| Llanidloes Oakham | United Kingdom Time | 00:00 |
| Llanidloes Oakhurst | Pacific Time | 08:00 |
| Llanidloes Oaklands Park | Central Australia Time | -08:30 |
| Llanidloes Pathiyavaram | India Standard Time | -04:30 |
| Llanidloes Patho | Eastern Australia Time | -09:00 |
| Llanidloes Patchway | United Kingdom Time | 00:00 |
| Llanidloes Pataskala | Eastern Time | 05:00 |
| Llanidloes Patagonia | Mountain Time | 08:00 |
| Llanidloes Pass Christian | Central Time | 06:00 |
| Llanidloes Paul | Mountain Time | 07:00 |
| Llanidloes Pattaya | Indochina Time | -06:00 |
| Llanidloes Patterdale | United Kingdom Time | 00:00 |