I just looked at my account and saw I had a code for:
Premier Cardmember 15% Off
Thank you for being a Rapid Rewards Credit Cardmember. Use this code for a 15% discount off all travel (excluding Basic Fare)
Expiration: Aug 01, 2026 11:59pm (Central)

The Fine Print:
Terms & Conditions
Southwest® 15% Promotion Code: Cardmembers with a Southwest Rapid Rewards® Premier Credit Card or Southwest Rapid Rewards® Premier Business Credit Card will receive one 15% promotion code each account anniversary year. “Account anniversary year” means the year beginning with your account open date through the first statement after the anniversary of your account open date, and each 12 billing cycles after that. The 15% promotion code will appear in your Rapid Rewards® account within 15 days of account anniversary. The promotion code will be valid within one year of delivery, the exact date of which will be listed in your Rapid Rewards® account. The 15% promotion code savings is not valid on Basic fare bookings. Promotion code must be entered in the Promo Code box and will be applied to the base fare before government taxes and fees. Please note that the Department of Transportation (DOT) requires advertised fares to include all government taxes and fees, however this promotion code savings applies to the base fare only. All flights are subject to taxes, fees, and other government or airport-imposed charges of at least $5.60 per one-way trip. Applicable taxes, fees, and other government or airport-imposed charges can vary significantly based on your arrival and departure destination. The payment of any taxes, fees, and other government or airport-imposed charges is the responsibility of the Passenger and must be paid at the time travel is booked with a credit card, flight credit, or Southwest gift card. Fares are subject to change until ticketed. The promotion code is not redeemable for cash and may not be used in conjunction with other promotion codes, special offers, or toward the purchase of a gift card or previously booked flight, or change to a previously booked flight. The promotion code is only valid on Southwest.com and Southwest app and is not valid on group travel or Southwest Vacations®, Getaways by Southwest™, fares booked via swabiz.com, our Southwest Partner Services API or through Global Distribution Systems, or special fares, such as military and government fares. Credit card account must be open and not in default at the time of fulfillment. Chase is not responsible for the provision of, or failure to provide, the stated benefits and services.