Update: this popular deal may have sold out. See more deals >

Southwest has released an eleventh-hour discount coupon, which will knock 35% off the price of a round-trip fare. To redeem this offer, book your flights at Southwest.com and use the promo code THANKYOU.

Discounted fares are good for travel on the following dates: January 29, 30, February 13, 19, 20, 26, 27 and March 5. You must book by 11:59pm tonight, in the timezone of your originating flight.

Some restrictions apply to this offer. See the full details here.

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