Unlimited flying on JetBlue for $600

(expires August 21)

JetBlue offers an unlimited flying pass for its entire route network.  The $599 All-You-Can-Jet pass lets you fly on confirmed seats (with 3 days of advance purchase) during the period of September 8 to October 8 anywhere JetBlue flies, including the Bahamas, Costa Rica, Bermuda, New York, and Los Angeles.  Domestic flights are completely free, but you will have to pay taxes on International flights and flights to Puerto Rico.  For anyone thinking of living on an airplane next month to earn frequent flier miles, you'll only earn 35 frequent flier points for buying the pass and none for the actual flights.

If you don't have time to jet around like a bum, you can also use code MLNTH09 for 20% off JetBlue flights through October 31.