Southwest Airlines Up to 40% Off Base Fares

• Southwest Airlines now offers flight fare discounts, with base fares up to 40% off, no promo code needed, discount shown at checkout.
• Travel dates: October 5, 2026 – March 3, 2027.
• Eligibility: Some dates and flights are excluded, see page for details.
• Offer ends September 17.
• Buy >>

Editor's Pick: Book by September 17, then choose flights between October 5 and March 3 of next year to use this discount. The system applies it automatically, no code needed. If your travel falls during fall break or winter break, picking your dates early and booking ahead makes things easier. Some dates and routes are excluded, so check the terms before you book.