Frontier Airlines via ShermansTravel discounts select nationwide 1-way fares, with prices starting from $29. That's the lowest price we could find for select routes by $5. Book this travel deal by June 30 for travel from June 18 through August 28. Buy Now Tips On the ShermansTravel landing page, click on "" in the top paragraph to see this sale; we found lower fares within. We found this price on flights departing on June 19 from Las Vegas, NV (LAS) to San Diego, CA (SAN). All prices, dates, and booking details were valid at the time of publication.