Frontier Airlines via DealBase discounts select Frontier Airlines Nationwide 1-Way Fares with fares starting from $28.30. (On the DealBase landing page, click on "Frontier Airlines" in the top line to see this sale.) That's the best price we could find for select routes today by at least $5. This price is valid on flights departing from Denver, CO, (DEN) with arrival in Seattle, WA, (SEA) on February 7. Book this travel deal by January 21 for travel on Tuesdays and Wednesdays from January 7 through May 23.

All prices, dates, and booking details were valid at the time of publication.