[Expired]Today Only: Frontier Airlines 2021 Fares From $21
- Frontier Airlines offers 2021 Fares From $21.
- Fares are one-way for nonstop domestic travel in select markets on select days of the week.
- The following blackout dates apply: 12/16/20 - 1/4/21; 2/11 - 2/12, 2/15/21; 3/5 - 3/7, 3/12 - 3/14, 3/19 - 3/21/21; 3/26 - 4/5/21; 5/27 - 6/1/21; 6/29 - 7/13/21; 9/2 - 9/7/21; 10/7 - 10/12/21; 11/18 - 11/30/21. Additional blackouts apply to/from San Juan, PR and St. Thomas VI 1/5 - 1/13/21.
- Deal ends 12/4 23:59 PST.