One airline has made it easy and affordable to travel to three cities in the Caucasus: Baku, Kutaisi and Yerevan. Wizz Air has previously taken me from Budapest to the Azeri capital and from Luton to the main city in central Georgia. Next month, I shall fly on the carrier from Milan to the Armenian capital. Wait until June and Wizz Air will fly you to Yerevan nonstop from Luton. The Bedfordshire airport was the destination for the very first Wizz Air flight in 2004, from Katowice in southern Poland. Luton quickly became Wizz territory. While the airport is the location of easyJet ’s HQ, by then Gatwick had supplanted Luton as its biggest base. Ryanair were always around, but with a far smaller operation than from Stansted airport. So Luton made sense for a home in London, the biggest aviation market in Europe. Other airports have proved less successful. Cardiff, Doncaster and the Maldives are not locations that often feature in the same sentence.…