Hi there,
The agency sold you a ticket with 2 different PNRs: one for Air Calin from Nouméa to Singapore, and one for Emirates from Singapore to Nice via Dubai. So, you’ll need to go through border formalities, collect your luggage, and then clear customs in Singapore. You arrive at Terminal 3 in Singapore and depart from Terminal 1 with Emirates, so you’ll take the train that connects the terminals to get to Terminal 1. At the departures level, check in with Emirates for Nice. In Dubai, you won’t need to collect your luggage—they’ll go straight to Nice. You’ve got an 8-hour layover in Dubai in the same terminal, so relax and just check the screens for your departure gate to Nice if it’s not already on your boarding pass. You’ll do the same thing on the way back, but in reverse.
During your layover on the return trip in Singapore, you’ll have time to explore the airport, check out Jewel—it’s a one-of-a-kind experience in an airport, and it’s free! Experience Wonder at Jewel Changi Airport - Jewel Changi Airport
To confirm, when you check in your luggage in Nouméa, just ask the agent.
Cordialement,
Patrick.