This deal has expired, but be sure to check out our Top 25 deals of the week for savings on trips to destinations around the globe.

The first few weeks of May, before Memorial Day kicks off the summer travel season, present a sweet spot for domestic travel. You’ll find pleasant spring weather in most of the country, without the crowds and heat that can plague July and August vacations. Take advantage with Frontier’s nationwide fare sale, which is slashing rates on routes between popular destinations, including New York, Los Angeles, Denver, and San Antonio. Tickets drop to as little as $44 each way, including most taxes and fees.

Sample Fares (O/W):

Albuquerque – Denver: $ 44+
Denver – Tucson: $ 49+
Denver – Phoenix: $54+
Des Moines – Milwaukee: $59+
Spokane – Denver: $69+
Los Angeles – Denver: $74+
New York (LGA) – Milwaukee: $84+
Madison – Denver:  $99+
Minneapolis/St. Paul – Kansas City: $109+
San Antonio – Milwaukee: $114+

THE VALUE: One week after the sale, fares on the Albuquerque to Denver route jump to $99 each way – more than double the current price.

THE CATCH: You’ll have to act fast: Tickets must be booked by May 18 for travel through May 25.

WE’VE GOT MORE: Use our Travel Search price comparison tool to find the lowest rates on hotels and other travel deals.