Where in Texas? It matters.
On Greyhound's web site, it indicates that a ticket from Phoenix to Amarillo would be $177.50 (one-way) if you wanted to leave tonight. You can get considerably better rates by purchasing in advance (at least 7 days ahead), about $84 one-way.
05:15am06:55am1h, 40m0GLI1258
08:20am10:00am1h, 40m0GLI1013
01:30pm03:35pm2h, 5m0GLI1003
04:45pm06:50pm2h, 5m0GLI0515
09:00pm11:05pm2h, 5m0GLI1248
I would call this a stupid question.
There are a few ways to find out about Greyhound Bus delays. They post delays on their official Facebook page and you can also call the company and ask about delays.
Yes, you can travel with the Greyhound bus from Amarillo TX to Oceanside CA.
It varies depending on a number of factors. You can look up the exact current fare on the Greyhould website, which will allow you to see various discount fare categories.