What are the secrets to finding the cheapest airfare?

We live in Salt Lake City and we booked our hotel in Cancun, Mexico for a week long vacation in June. What are the secrets to finding the cheapest airfare?

This is a great site. It checks multiply sites at the same time. Due to some glitch with yahoo, I'm unable to give you a clickable link. just add the http://www.
before the link and you are good to go.
bookingbuddy.com

The trick to getting the best airfare deals are
1... to check all the sites often starting 6 months out before vacation.
2...If you fine a good price and it fits your budget, also check the airline website, they are sometimes cheaper.
3... Many times the airlines will refund your money if the airfare drops, as long as it's the same itinerary. One year we were going to St Maarten and the airline dropped the price, they refunded to my credit card the difference. Of course you have to call. Ask to speak to a supervisor if you don't get results from the first airline rep.
4.....Booking the air and land together many times saves hundreds of dollars.
5.....I do my research on line, after I know where I want to go and I have a price, I go to my local travel agency and see what they can do for me. Often they will match the price or do better. That was the case, this past May when we traveled to Cancun. We saved several hundred dollars by booking through a travel agency. It doesn't happen all the time.

I wish you a great trip and I hope these tips help you out now or in the future)

take a look at this website http://allyourtravelinfo.com it has a few articles and a travel secrets book check it out

Your best bet would be to contact the airlines directly.
Mexicana and Aeromexico are the cheapest airline flying into cancun.