Frontier Airlines is kicking off the end of summer with a limited-time sale offering round-trip flights starting at just $38 to destinations across the U.S., Caribbean, and Latin America. Available until August 21, these discounted fares make spontaneous getaways more affordable than ever. Frontier Miles members also benefit from triple miles on bookings made by August 26. Combined with new upgrades like UpFront Plus seating, Frontier continues to redefine budget-friendly travel with added comfort.