Most of the deals for slots at the US slot constrained airports have been on alease basis, although buying and selling there is legal. Average slots prices between 1990 and 1997 were around US$1 million, with a US Airways deal in 2000 valued at just under $1 million per air carrier slot, and much lower for commuter slot. The same source also highlighted the large variation in value between peak and off-peak period, the difference at New York, La Guardia Airport being four times.24
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