Focused on Indian Ocean carriers and routes, the Vanilla Alliance was formed in 2015 by it's 5 member airlines. The Vanilla Alliance is the world's smallest alliance, carrying a mere 2.3 million passengers per year, compared to SkyTeam's 665.4 million passengers per year. Serving all of the 'Vanilla Islands', Vanilla's member airlines travel from Seychelles, Mauritius, Madagascar, the Comoros, Reunion, Mayotte, and the Maldives to 89 different destinations.
Unless you're flying a major airline from one of the three global alliances, you'll surely end up on Vanilla Alliance when traveling to vacation destinations in the Indian Ocean. As such, loyalty program and elite status benefits will only serve those who frequent the island nations of the Indian Ocean.