Something is wrong with your search. Try clearing cookies/searching from a different IP etc. TLV-JFK today is wide open in economy...
Nothing is wrong with my search- all I get is REFUNDABLE Main Cabin or premium economy. No matter what booking engine, no matter what date, even Delta's website- May, June, July, August. And of course, refundable is significantly more expensive.
This is EVEN USING ITA MATRIX!
Are you seeing something else, PlatinumGuy? A main cabin non-refundable? No matter how I search, it bundles it with either premium economy or refundable main cabin on the TLV-JFK leg.