Southwest Summer Sale: Up to 30% off flights in summer, early fall

SAVE UP TO 30%: Through May 1, use code SUMMER30 to take up to 30% off base fares for select Southwest flights taking place between May and October 2025.

Did you miss the “up to 30% off flights” sale that Southwest had in early April? No worries — you have another chance to find cheap vacation flights for this summer, because Southwest is basically holding the same sale all over again.

During the Southwest Summer Sale, use code SUMMER30 will unlock discounts of up to 30% on many Southwest flights booked by May 1 for travel coming up in late spring, summer, and early fall. Discounts on base fares apply to continental US travel between May 20 and Oct. 2 and travel to Hawaii, Puerto Rico, and select international destinations between August 17 and Oct. 3. Some specific blackout dates apply, and flights to certain destinations are only eligible on certain days of the week.

If you’ve been putting off booking a flight in hopes of strategically saving money, the timing of this sale is particularly advantageous: This is one of the last sales Southwest will have before its free bag policy as we know it goes away. The airline announced in March that it was axing one of its biggest draws — two free checked bags for everyone — for a more exclusive version of the policy, which mostly caters to Rapid Rewards A-List Preferred Members and Business Select passengers. Everyone else will have to start paying for their bags on any Southwest flight booked on or after May 28. This summer sale requires booking by May 1, so you’re in the clear there.

For now, Southwest still offers free iMessage and WhatsApp on every flight, so that’s something.