服務日期起始時間從 06:23 出發於 2026年9月8日預定出發顯示 21公車行程至預定觀察到389Tring Railway Station06:26—389Tring Railway Station06:49—61Asda07:26—389Tring Railway Station07:31—61AAsda08:19—389Tring Railway Station08:43—61Asda09:26—61Asda11:06—61Asda12:26—61Asda14:26—63The Green, Cheddington15:16—63The Green, Cheddington16:06—61Asda16:21—63The Green, Cheddington16:46—63The Green, Cheddington17:21—389Pond17:33—63The Green, Cheddington17:56—61Asda18:06—63The Green, Cheddington18:36—63The Green, Cheddington19:11—61The Green19:21—預定和觀察到的數值分開保存。當缺少特定站點的即時觀察時，BustimeFinder 不會捏造即時出發。