The deal starts in March and was negotiated through MediaVest. The multi-media sponsorship will involve podcast sponsorship, on-line and on-air competitions.
Aer Lingus has opened up new routes from Gatwick to European destinations including Faro, Munich and Nice. The partnership aims to build awareness of the airline with Londoners.
Capital FM is part of the Global Radio group. The London station has 981,000 weekly listeners.