Southwest Airlines offers up to 50% off select flights, valid for travel within Aug. 6-Dec. 18, using promo code BDAY before June 13.

Southwest Airlines is offering up to 50% off flights to celebrate its birthday. The discount applies to select flights booked before June 13, with travel dates between Aug. 6 and Dec. 18 within the continental U.S., or between Aug. 20 and Dec. 17 for flights to Hawaii, Puerto Rico and international destinations. Blackout dates apply. Use promo code BDAY to access the discount.