M. R. Štefánik Airport — Bratislava, Slovakia

M. R. Štefánik Airport is Slovakia's main international airport, serving the capital city of Bratislava from a site on the eastern edge of the city. It honors Milan Rastislav Štefánik, a co-founder of Czechoslovakia and a noted astronomer and military figure in the early twentieth century. Coded BTS, the field is set 436 feet above sea level and operates two runways. Because Bratislava lies so close to Vienna, BTS has long marketed itself partly as a budget-friendly alternative for travelers willing to cross the border, and low-cost carriers have built a meaningful presence at the airport as a result. Passenger traffic through BTS includes both point-to-point European routes and connections serving the wider Bratislava and western Slovakia region, making it an important gateway despite operating in the shadow of its larger Austrian neighbor just up the Danube. Ground transport between the two capitals takes well under an hour by bus.