(CNN)– Frontier Airlines is offering a free checked bag on certain flights this summer. In a statement released Tuesday, March 18, Frontier’s CEO said this can be considered the ultimate “divorce your old airline deal”. Last week, Southwest announced an end to its long-time policy of t wo-free checked bags. Frontier officials say customer response will help determine if its free service will become permanent. People who want to take advantage of the deal must book a trip by Monday, March 24. Categories: News Tags: frontier airlines ...read more read less