Are there nonstop flights from Subang (SZB) to Seletar (XSP)?

Yes. Firefly fly this route. Flight time is about 53m.

Subang → Seletar

Sultan Abdul Aziz Shah International Airport (SZB) to Seletar Airport (XSP)・320 km

Nonstop flights available (1 airline). Flight time about 53m. Nonstop return flights also operate.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.