Min 1800, for non professionals I would say
What should be rating here for A class player or expert ?

Actually, there have been a lot of threads/posts in the past that have used stats to clearly show that of all the ratings on this site, Blitz ratings have the strongest correlation to OTB ratings. I'm not going to spend any time trying to dig any of them up right now, but you can.

That's possible because people may be using engines which is perhaps not prctbl in blitz chess. I personally do not like blitz at all, as it does not motivate me to play my best; it's too chancy.
I'd say 1700-1800 blitz at a minimum. I've even seen some masters with like 1700 1800 blitz ratings, so it happens. Some are older guys that aren't as good at the quicker time controls

"Says the 1300 blitz player"
Uh huh, I quite literally only play Blitz when I'm too tired or drunk, or whatever else to actually play chess but I still want to move pieces around. Aside from that having a low blitz rating doesn't make you stupid, that's a pretty absurd notion. What does make you stupid is saying any of the following things:
1. Your blitz rating will be lower because you have less time to think. (Totally ridiculous statement since the time control impacts every player in the rating pool, though it could be accurate for individuals it won't be statistically relevant)
2. "No ratings are accurate because they only measure limited pools xD" (This one is so stupid and it's repeated in every single thread about ratings. Look morons, if I play at a local USCF rated club with the same thirty to fifty players why in God's name would my rating be more accurate than playing on live chess standard with hundreds of thousands of players? Sometimes there are aberrations in rating pools, like with the prison population but generally your live chess standard rating is a very good indicator of your orb rating)
3. Chess.com blitz ratings are inflated compared to USCF orb ratings. (no, they are deflated, often by several hundreds of points though it does depend on the individual)

Lacks creativity is right however that a 1700-1800 blitz rating probably means you are about an expert in USCF rating. This won't hold true for everyone, but it's quite likely.

http://www.chess.com/forum/view/general/fide-ratings-vs-chesscom-ratings-explored
At the level of play that the OP is curious about, both the blitz and standard ratings on this website should be very close to the player's actual FIDE rating. 2K blitz or 2K standard ~ 2K FIDE.
2500+ for class A player. Everyone who's saying things like "1800" are stupid.
Are you perhaps confusing Class A with meaning top notch, first class with what an "A" player is in USCF, etc, which is 1800+?

What's a 'class A player'?
US thingy players are divided into brakets according to their ratings
http://www.chess.com/article/view/chess-rating-classes
Probably Standars rating now is close to USCF FIDE since the has this "fix" on them and so about 1800 Chess.com should be about Class A player.
Obviously blitz will have higherst correlation as it is most competitve here. For that linked article should give good enough answer
Thanks!

I wonder what is chess rating for expert or A class chess player ? Of course I think on standard rating, because blitz rating is not important.
Only Blitz ratings are reliable here. Standard ratings are way too inflated. Class A USCF should be around 1700-1900 Blitz. Or 2100-2300 standard.

Only Blitz ratings are reliable here. Standard ratings are way too inflated. Class A USCF should be around 1700-1900 Blitz. Or 2100-2300 standard.
How does a rating pool being inflated make it less reliable? That doesn't make any sense. Apples and oranges... Anyway, your rating estimations are WAY off. Like SO far off...

You are right that standard ratings here are really unreliable. People have really crazy standard ratings which say little about their actual skill level. So my guess 2100-2300 is, indeed, not very accurate...Blitz is the only rating here that comes close to someone's chess skill.
Your statement ("At the level of play that the OP is curious about, both the blitz and standard ratings on this website should be very close to the player's actual FIDE rating. 2K blitz or 2K standard ~ 2K FIDE.") doesn't make any sense. 90% of all players here have a Blitz rating that is 400 points below their standard rating. Including you!

You are right that standard ratings here are really unreliable. People have really crazy standard ratings which say little about their actual skill level. So my guess 2100-2300 is, indeed, not very accurate...Blitz is the only rating here that comes close to someone's chess skill.
Your statement ("At the level of play that the OP is curious about, both the blitz and standard ratings on this website should be very close to the player's actual FIDE rating. 2K blitz or 2K standard ~ 2K FIDE.") doesn't make any sense. 90% of all players here have a Blitz rating that is 400 points below their standard rating. Including you!
What are you talking about? I never said anything about standard rating here being highly unreliable. I believe the exact opposite. As for lower rated players such as myself having higher standard than blitz ratings, that is true. At the higher levels, it isn't.
I wonder what is chess rating for expert or A class chess player ? Of course I think on standard rating, because blitz rating is not important.