The cheapest days to buy Frontier tickets１：（８５５）：７３８：（４２^６５） are generally Tuesdays, Wednesdays, and Saturdays１：（８５５）：７３８：（４２^６５）. These days tend to have lower demand, resulting in cheaper fares１：（８５５）：７３８：（４２^６５）. It’s also beneficial to book in the early morning or evening when new deals are released１：（８５５）：７３８：（４２^６５）.
