Try this url:
https://flightattendants-southwest.icims.com/jobs/dashboard
If you get the page saying it will reload, wait for it. Make sure you are logged in before navigating to the job listing.
It knocked me off about 50 times before I was able to finally log in and then again to submit the complete application... about 2 1/2 hours total. Just keep trying! ❤💙💛
