Hi PrettyThe price from ATL to LAX won't be too much. If you're going round trip, it will probably be about $250, and 1/2 that for 1 way. I'm just guessing, but that seems about right and I'm sure I'm within $50.I'm not sure what "church attending attire" means, but the dress code is pretty relaxed. They don't want you to wear cut off shorts, tube tops, tank tops, etc. But jeans are fine, your running shoes are ok, t-shirts are even ok, but I usually don't go that casual. Once, in the past, there were no jeans allowed in first class, nor running shoes, but these days, it seems pretty laid back. I haven't heard a thing about dress codes for years.As for arrival time at the airport, typically you won't know if there is a seat for you until about 10 to 15 min. before departure. If you get to the gate 1 hour before the flight, you will have more than enough time. The real issue is how long the security line at the airport is -- I would add 30 more min for that. If you are very risk-averse, make it 2h before the flight.Any more questions, feel free to ask!