...I think you're over-estimating the market from USA to former eastern European countires such as Poland, Czech Republic, Slovakia, Hungary. Sure, American tourists flood those cities/countries in the summer, but what about the rest of the year? People in those countries typically earn ~$10-15000 per year, they're NOT going to take vacations in the USA, and definitely NOT to PHL or PIT or CLT or PHX. Plus each of those countries flag carriers offers service to the USA: usually to JFK (OK, LOT, Malev) and usually at cheap prices (Czech Airlines prices in the off season ~$500 tops)....