As the temperatures fall, so are airfare prices. Frontier Airlines is running its «Full Size Sale», which provides fares as low as $19 to destinations around the United States. Best of all, the flights can be booked five days of the week, whereas previous promotions from Frontier have been more limited in date availability. The sale ends on October 31, 2024 at 11:59pm EST, however tickets can be purchased for travel through February 26, 2025. This makes the sale a great option for travelers and families looking to take a winter getaway, or fly to a destination with warmer temperatures. Travel + Leisure spotted a variety of one-way flight deals including: