by Barbara S. Peterson

If you were thinking of ducking work obligations for a month to take advantage of that wild JetBlue deal--a 30-day unlimited travel pass for $599--better cancel that meeting with the boss. JetBlue has halted sales of the pass ahead of its original deadline, August 21, due to what the airline claims was higher than expected demand.

Then again, you should be thinking of traveling in September even if you missed out on this one. September is typically one of the slowest months for the airlines, and that will be especially true this year if the disappointing summer numbers are any indication. So look for a flurry of short-term discounts to drive up sales.  And the notice can be short--very short, as in hours. So check out @JetBlueCheeps on Twitter every Monday, when it posts the latest and greatest discount fares, follow airlines such as @UnitedAirlines for sale notices, and check out travel forums. We found this discount deal from Southwest at about.com.