Frontier Airlines Friends Fly FREE coupon code: Buy One Get One FREE select return flights

This May, enjoy the promotion that Frontier Airlines has for all of you: For a limited time, go to Frontier Airlines online store to buy one round trip Discount Den Fare and get another one for free on select routes and dates! Just use the promo code “FLYFREE” at checkout. Purchase must be made by May 19th, 2019. Travel has to take place by June 12th, 2019 or between June 18th – August 28th, 2019.