The best discount code for flyfrontier.com currently is SAVE50. This code offers a 50% discount on the base fare for your next flight. The offer is valid for nonstop and connect domestic and international travel on Tuesdays, Wednesdays, & Saturdays. The discount applies to base fare only, not to government taxes and fees or carrier-imposed fees. Round trip purchase and 21 day advance purchase are required. Please note that route exclusions apply. The promo code must be applied directly by the customer on flyfrontier.com or requested of a Frontier Airlines call center agent. The offer is valid until August 7, 2023, and the travel must be completed by November 15, 2023. Blackout dates apply: September 5, 2023, and October 10, 2023.