Flying in/from Tenerife
Depending on where you are travelling from, you will land at one of the two airports on Tenerife:
Aeropuerto de Tenerife Norte (TFN)
The older one is located in the North, and is used mostly for flights to and from other Spanish airports and especially Gran Canaria.
Aeropuerto de Tenerife Sur Reina Sofía (TFS)
This is bigger and newer, but as it is located in the South near the holiday centers, the commute is longer, approx. 1 hour by bus or taxi. This airport is used for the vast majority of flights and most likely the one you will arrive with.