I'm flying to Las Vegas next week on Southwest airlines, I can't find any information as to whether a covid test is required.... does anyone know? I've called the airlines and can't get a direct answer. Thank you in advance.

I flew southwest out of long Beach at the end of August, wasn't asked to show either proof of vaccine or negative test

No test. Just wear a mask. I was on Southwest.

I felt to Salt Lake on Tuesday of this week. No covid testing was required to board my plane...

Within the USA , all are treated as unvaccinated: no requirements to show test or vaccination status. International flights might, depending on countries involved and if you are just passing through or staying there. Germany requires currently, a registration of where you will observe quarantine, for example. I have flown SW, United and Lufthansa in the last 14 days..( between LAX, PDX, SAT, IAH and Frankfurt)...

If you haven't gotten the Covid Vaccing you will probably be required to do a test. But if your vaccinated then you just need to show proof. Hope this helps