Southwest Airlines Base Fares Deal: Save 40% with Promo Code 40SALE at Southwes…
40SALE
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Updated March 28, 2026
Southwest Airlines is offering up to 40% off base fares with promo code 40SALE when you book by October 23, 2025. The discount applies to select flights between December 3, 2025, and March 4, 2026. Restrictions, exclusions, and blackout dates apply.
Promo Code: 40SALE
Book By: October 23, 2025
Travel Window: December 3, 2025 – March 4, 2026
Savings: Up to 40% off base fares
Note: Discount applies to base fare only and is calculated before taxes and government fees. Restrictions, exclusions, and blackout dates apply.
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