Drones with a max flight time of 12 hours or more

No drone in our catalog lists a max flight time of 12 hours (720 minutes) or more — the closest options are well short of that mark, though one comes with an important nuance.

Closest match: Quantum-Systems Reliant

The Quantum-Systems Reliant is the longest-endurance drone listed — a Group 2 hybrid VTOL fixed-wing UAS for long-range ISR, with a heavy-fuel engine, 160 km range, 9 kg payload, and two NVIDIA Jetson Orin NX modules for onboard edge AI processing. Note the tension: its catalog spec field lists 600 min (10 hours) of flight time, while its product description states 10+ hours endurance. So it's the only drone that might reach into the 12-hour territory in practice, but I can't verify that from its stated figures — 10 hours is the number the catalog carries. quantum-sy... +2quantum-systems.com ↗“hybrid VTOL fixed-wing UAS for long-range ISR with a heavy-fuel engine”quantum-systems.com ↗“drone.max_flight_time_min=600 min”quantum-systems.com ↗“heavy-fuel engine and 10+ hours endurance”

Other long-endurance options

For a long-endurance survey mission, the Reliant is your strongest candidate — its hybrid heavy-fuel powertrain and VTOL fixed-wing design are built exactly for that kind of long-range, long-duration ISR work. If a full 12-hour sortie is a hard requirement, I'd suggest confirming the actual endurance envelope (including payload/wind conditions) directly with Quantum-Systems via their Reliant page, since the published spec I found tops out at 10 hours.