WhenbusComing soon to theApp Store

Singapore bus service

991B

Choa Chu Kang Int to Opp Choa Chu Kang Mkt.

6 stops · SMRT Buses

BP1NS42 rail connections

Towards Opp Choa Chu Kang Mkt

6 stops, Choa Chu Kang Int to Opp Choa Chu Kang Mkt.

#StopMon to FriSaturdaySunday
1Choa Chu Kang Int44009 · Choa Chu Kang LoopBP1NS412:18 am – 12:55 am12:18 am – 12:55 am12:18 am – 12:55 am
2Lot 1/Choa Chu Kang Stn44539 · Choa Chu Kang Ave 4BP1NS412:19 am – 12:56 am12:19 am – 12:56 am12:19 am – 12:56 am
3Opp Blk 21044399 · Choa Chu Kang Dr12:21 am – 12:58 am12:21 am – 12:58 am12:21 am – 12:58 am
4Opp Blk 20344111 · Choa Chu Kang Ave 112:22 am – 12:59 am12:22 am – 12:59 am12:22 am – 12:59 am
5Opp Blk 816A44889 · Keat Hong Link12:26 am – 1:03 am12:26 am – 1:03 am12:26 am – 1:03 am
6Opp Choa Chu Kang Mkt44099 · Choa Chu Kang Ave 112:29 am – 1:06 am12:29 am – 1:06 am12:29 am – 1:06 am

First and last bus are LTA's scheduled times for each stop, so they get later as the bus works along the route. Live arrival times are on each stop's own page. Data updated 2026-08-22.