Skytrax, the airport review site, surveyed 77 airports for PCR tests and found prices ranging from $8 in Mumbai to $404 in Japan’s Kansai. In the former Soviet space, the cheapest is Minsk: $15. At Kyiv’s two airport– Borispol and Zhulyany – the price for a test is $40. Few American airports offer testing. The cheapest is Fort Laud...