Are there nonstop flights from Phaplu (PPL) to Kathmandu (KTM)?

Yes. Nepal Airlines, Summit Air (Nepal), Tara Air fly this route. Flight time is about 39m.

Phaplu → Kathmandu

Phaplu Airport (PPL) to Tribhuvan International Airport (KTM)・122 km

Nonstop flights available (3 airlines). Flight time about 39m. Nonstop return flights also operate.

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