Iberia

Travellers who use Iberia services have the opportunity to sign up for the Iberia Plus discount system, where they can earn Avios points for their purchases, which they can then use on other trips and services.

Points are earned according to the length of the flight and the fare purchased (per mile from 0.25-2.50 Avios). Points can also be combined with airline partners (e.g. Level, Vueling, British Airways, American Airlines...).

Use points for other flights and services including accommodation or car rental.

Details of the program can be found on the airline's website here.