프론티어에서 프레지던트데이 세일로 오늘만 2월 20일에서 27일 사이의 도메스틱 왕복을 99% 세일한다네요. 

대부분의 도메스틱 왕복이 Tax & Fee만 별도로 약 70불정도 나오네요.

https://www.flyfrontier.com/deals/sales/promo-code/save99

Tickets must be purchased by 11:59 pm Eastern time on Feb. 17, 2020 for nonstop domestic travel, and nonstop travel between United States and Puerto Rico/Canada.  The discount is valid for travel Feb. 20 – 27, 2020.  Round trip purchase required. The 99% discount applies to base fare only, not to fees or taxes, and requires purchase at FlyFrontier.com using promo code SAVE99.