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The British Airways flight into San Diego used to be a 747-400 that flew LGW-PHX-SAN and return. Since the flight had very little fuel in white into and out of SAN, it wasn't much a problem. BA wanted to make the flight nonstop, but because of the runway length and terrain obstructions around the airport, a 747-400 wasn't possible. Just last week they made the flight nonstop with a 777-200 that has the range and capability. The PHX-LGW nonstop also went to a 777-200.
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