[lacrew]

Don’t most drones bought ‘off the shelf’ operate in a narrow band of frequencies?...which I assume would not overlap with frequencies reserved for air travel?

Can they jam those frequencies?

[Yo-Yo]

Most use 2.4 GHz frequency hopping, the same frequencies that Wi-Fi and microwave ovens use. Because of Hedy Lamarr's frequency hopping technique, to jam you'd have to flood the entire band.

(That's Headly...)

[Red Badger]

The most commonly used remote control R/C communication link by commercial drones' manufacturer (such as Parrot AR Drones). Common R/C frequencies: Band 1: 2.4 MHz – WIFI g/b/n: ≈ 2.4 – 2.5 GHz. Band 2: 433 MHz ISM Band: 433.05-434.79 MHz.