Sign up at
www.smarterliving.com
the will e-mail you the net-saaver web fares for all the airlines involving YOUR city. that way if an opportunity comes along you see if the two cities involved are available.There's pricematcher through
www.expedia.com and priceline where you bid for tickets, but you have to take what they give you and if you don't have a lot of time you could get Sat night, to Sun morning, rather than Sat morning until Sun night.
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DtG