best choice
 

hi am planning a trip from tlv to nyc in feb i am an allitalia gold (feccacia allata) i was wondering which airline is my best bet air france, ilm or alitalia. thanx for your help.;)

Depends on several factors: itinerary (and connecting airport), class of service, aircraft type, cost.
Of course, if with Freccia Alata you are able to upgrade on AZ...

I disagree with the unfavourable comments about Alitalia. In fact, it is arguably the best J service of the lot, for instance.

does every economy ticket get upgraded and if yes whats the upgrade

I suggest you read Freccia alata's T&C. My idea is that a Gold member should know what to expect from the program he's a member of... (including spelling its name ;) )

TLV-NYC? Take the Delta non-stop.

Without further information here's two rules of thumb:
1. You will benefit most from yiur status when flying the aurline that your frequent flyer program is from. So Alitalia in your case.
2. In Economy, European legacy carriers such as AF, KL, AZ, LH, OS, LX, BA offer a better product than the three big US carriers.