Https://www.mvsu.edu/sites/default/files/webform/cheap_daywhat_is_the_cheapest_day_to_book_with_spirit.pdf https://www.mvsu.edu/sites/default/files/webform/cheap_daywhat_is_the_cheapest_day_to_book_with_spirit.pdf https://www.mvsu.edu/sites/default/files/webform/cheap_daywhat_is_the_cheapest_day_to_book_with_spirit.pdf https://www.mvsu.edu/sites/default/files/webform/cheap_daywhat_is_the_cheapest_day_to_book_with_spirit.pdf