Budget carrier Frontier is countering Southwest’s move to charge for seat assignments and checked luggage by offering its own economy bundle deal. Customers can book nonstop flights with a seat assignment and carry-on bag without an extra fee, available from Tuesday through March 24 for travel until August 18. Additionally, free checked bags are included on flights departing May 28 through August 18 if booked using promo code FREEBAG. This promotion aims to attract customers who prioritize affordable fares over extras.
Source: https://www.cnbc.com/2025/03/18/frontier-airlines-free-checked-bags-promo-southwest.html