Day 1 - Arrival at 2330 (UA), stay in Singapore
Day 2 - Go to Bintan at 0800, stay 1 night
Day 3 - Leave Bintan at evening back to Singapore
Day 4 - Morning flight back to HK
Day 1 - Arrive at 6:00 (CX), stay in Singapore
Day 2 - Go to Bintan at 1400
Day 3 - Stay at Bintan
Day 4 - Leave Bintan by Ferry at 0930 and flight back to HK at 1600