<Tr> <Td> United States (Pennsylvania) </Td> <Td> Harrisburg </Td> <Td> Harrisburg International Airport </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> United States (Pennsylvania) </Td> <Td> Philadelphia </Td> <Td> Philadelphia International Airport </Td> <Td> Hub </Td> <Td> </Td> </Tr> <Tr> <Td> United States (Pennsylvania) </Td> <Td> Pittsburgh </Td> <Td> Pittsburgh International Airport </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> United States (Rhode Island) </Td> <Td> Providence </Td> <Td> T.F. Green Airport </Td> <Td> </Td> <Td> </Td> </Tr>

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