Travel often to Singapore?
- Global Entry members;
- Have been to Singapore at least 3 times in the prior 12 months;
- Aged 6 and above.
Members of other US Trusted Traveler programs such as NEXUS and SENTRI are not explicitly mentioned. Since all provide a Known Traveler Number, it is worth a try.
Application is free of charge.
Once in-principle online approval is granted, you must make an advance appointment for an in-person interview in Singapore. Details and interview centers listed here.
Upon approval you can pass through electronic immigration gates rather than the regular lines.