airport to any hotel : SGD45 single trip
** this is same price for all 7-seat car,
this 7-seat car is on call service, if not go to airport, it is count by meter.
For peak hour 5-8 pm, there is 35% surcharge.
You may ask the hotel to call this 7-seat car for you when you already checked-in.
If you have SG local phone card, you may call the driver-Richard , SG code+92330884.
I called him from Hard Rock Hotel to SG zoo and China Town last week.
Benz 7-seat car require SGD50 single trip,
you may call from the airport where there is such transport service desk.
If you take SMRT, from airport to Harbourfront Station, 2A2C only costs < SG$10. If you have hotel confirmation, u are free to take Monorail from Harbourfont Station to Sentosa. It's much cheaper!
You can take a van. It only charges S$45 from airport to Festive Hotel.
Remeber to take out your hotel vouchers which can waive the toll fee via the bridge to Sentosa; otherwise, @$2 per car.
For inter cities, if your kids are under/or 3 years, you can take one taxi instead of 2. That's my experience.