In 2026, the most common reason a Southwest Airlines login fails is a mismatch between the legal name on your ID and your Rapid Rewards profile, which has become a stricter requirement with the full implementation of "Touchless ID" and REAL ID. If you recently updated your passport or license and the spelling or middle name doesn't match your account exactly, the system may flag the login as a security risk. Other technical reasons include a "Held Status" on your account, which happens if there has been suspicious activity or if you haven't updated your password in several years. If you are using a VPN, Southwest's security filters may block the connection entirely to prevent cyber-attacks. To troubleshoot, first try clearing your browser's "cache and cookies" or using the Southwest mobile app, which is often more stable than the desktop site. If you are still locked out, you may need to call their Rapid Rewards support line to verify your identity and "re-link" your profile to your current email address.