Why is the airport tax at some airport charged outside the airfare ticket but instead must be paid at the airport? Example from Uyuni airport
cai
grand-canyon
entertainment
landmarks
kbv
rio-de-janeiro
space
phl
nizhni-novgorod
swimming
star-alliance
pek
allegiant-air
bed-bugs
british-airways
livorno
gate-check
extreme-sports
mst
ruins
mexican-citizens
siberia
los-cabos
environment
french-polynesia
bergamo
greece
iguazu-falls
munich
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