Are you sure that $5 isn't Travelocity's service fee? If it is, then:
Originally Posted by Travelocity
The Low Price Guarantee applies only to the base cost, and not taxes and fees (or service fees), of standalone Flight, Hotel, Car, and Cruise bookings. For such bookings, any service fee or tax recovery charge is not considered in determining whether you have found a Qualifying Lower Rate. For example, with respect to a standalone Flight booked on Travelocity, the Low Price Guarantee applies only to the base cost of airfare, not including any taxes and fees. For all Activities and vacation packages, including Flight + Hotel, Flight + Hotel + Car, Flight + Car, Hotel + Car, and Hotel + Activities packages, taxes and fees are included in determining whether you have found a Qualifying Lower Rate.
I found this at:
http://svc.travelocity.com/info/info..._TERMS,00.html