Travel deals aren't something you necessarily associate with the annual deluge of Fourth of July sales, but it's probably time to forge that association. Tons of airlines --- Southwest's sale has $45 one-way fares -- are offering deep discounts over the holiday. Even budget airlines are tamping down prices. Frontier's new sale has one-way flights for as little as $20.
Frontier's "Our Best Deals" page usually has the airline's lowest fares. However, the cheapest fares currently listed are $49 one-way. Yet, if you dig into those flights and look for trips between August 14 and September 12, you can find $20 fares, which result in round-trip tickets for as low as $38.40.
Cities in the sale include Atlanta, Austin, Chicago, Denver, Detroit, Minneapolis, Orlando, Philadelphia, and Washington DC, among other locations.