Flybe passengers who book and fly with the regional airline in March can earn double Avios.
The promotion is valid on all flights operated by the carrier and those by its franchise partners Loganair and Stobart Air.
Martin Smith, Flybe's marketing director, said: "We are delighted to be launching this Avios promotion, which we know will be very popular with our customers. We're dedicated to offer seamless connectivity and pride ourselves as being, faster and cheaper than rail, so with this promotion there is now an even bigger incentive to switch to Flybe."
Flybe recently announced it will operate a weekly service between Cardiff and Dusseldorf this summer (see news, January 8).