We booked the night safari zoo trip through Viator before travelling to Singapore, and was definitely one of the trips we wanted to do in Singapore. Our pick up time from the hotel was 6pm. We were in the lobby from 5.50pm, and in fact...More
That tour starts at 9 and doesn't finish until just after 5 so I don't think you will have time for this one. I think they may have shorter ones though but I don't know if they pick up at the airport.