The best time for seniors to book Frontier Airlines flights is two to eight weeks before departure, when lower fares are often available. Traveling on Tuesdays, Wednesdays, or Saturdays and avoiding peak holiday seasons can also help reduce ticket costs. Seniors should regularly check Frontier’s website for flash sales and promotional offers, as the airline frequently releases limited-time discounts. Being flexible with travel dates and booking early increases the chances of finding the lowest fares. Joining the FRONTIER Miles loyalty program can also provide additional savings by earning miles that can be redeemed for future flights.