Update: December 13th - The fare war to Central America appears to be over. Prices on all airlines look to be back up to the $700-$1000 range.
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Update: December 12th - The crazy prices to Central America continue, with Delta and Continental getting in on the action now. Delta & Continental look to have matched many of the prices put out by AA, on certain dates.

There's a very interesting unadvertised sale going on with Delta at the moment, to many cities in Europe that never usually go on sale.

United, American Airlines, Continental, and Delta just engaged in a serious fare ware to Central America!

For some reason Delta's flight from December 24 to January 9 from Vancouver to Warsaw, Poland is unusually cheap, at $747 roundtrip after taxes.

UPDATE: September 9th - Take this blog post, and substitute the city of New York for Philadelphia (PHL) or Charlotte (CLT) on United. They've dropped their prices to those cities down to about $329 roundtrip after taxes, across the board, throughout 2011 and 2012.

It's been an interesting day for flights out of YVR to U.S. cities. First the flights to New York, Washington and Cleveland on Delta, and now flights to Memphis and Atlanta on United have dropped by nearly 60% as well.

Delta just made a massive price cut on their flights to Newark (EWR), Washington D.C., and Cleveland (CLE). When searching for Washington, use code WAS, which will search both airports.

Delta just dropped certain fares to Boston by about 50%, down to $181 roundtrip after tax. Even from Seattle that's a ridiculously cheap price.

Delta just dropped an unannounced bombshell on prices to Europe out of the U.S.