What's the best source for additional discount codes

[luckofthedraw]

...on airlines, car rentals, etc? Where do you find the additional percentages that make a great deal too good to pass up?

 

[CapeCod53]

I used kayak.com for my airline tickets. You actually book with the airline, not kayak but they have all the flight info to compare including JetBlue which most search engines do not. For the rental car I used Mary's codes on Mousesavers.com. I also signed up for email notifications from the rental car companies I was interested in using, ie National & Dollar & get info from then on a regular basis including codes & coupons. I also get emails from CheapTickets.com, SmarterTravel.com, Booking Buddy, TravelZoo's top 20 (we got our deal on AirFrance flights last fall thru them). Some of them have good travel info articles as well.