How to get a cheap airfare?

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• How to get a cheap airfare?

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Boeing 737 --- American Airlines
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• 737 Seat Maps
• First class 16 Seats
• Economy class 132 Seats
• Total 148 Seats

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???? ?????,??????,???????????? 4 7 ??(?? 21
????)? Cheapair.com ??2012???5?6000??????,????????
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?????? ?????????? Travelocity?Expedia?Orbitz?
Priceline ? Kayak ????????????but they do not
search southwest.com ? (Southwest
Airlines??????????????) ? ?????? ??????????????
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• ?????????
• http//www.airfarewatchdog.com/ Search for Best
  Airfare Deals ???????????
• http//www.cheapoair.com/
• http//www.bing.com/travel/ (Farecast.com)
  ?????????????????????????????????????????(??50????
  )?????????????????????????????????????????

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1. Airlines lower fares on different routes everyday
   without advertising them. A fare could be 400
   today and 98 tomorrow, and then 500 the next
   day.
2. To buy "good" ticket from DFW to DCA (or IAD) for
   the 5/24 - 5/27 weekend, you may need to continue
   checking the webs for the next two weeks (it
   seems to me that Wednesday morning is good to
   check the fare from AA.com, also try
   http//www.cheapoair.com/ or travelocity.com),
   but if you need to buy the tickets now, maybe you
   can consider flying to Baltimore (BWI). The fare
   is under 200 from DFW to BWI (round trip) now.