Is there any reason i can't check in with El Al for a trip JFK-ZUR, ZUR_TLV?
Maybe because there is no IATA code of ZUR?
In all seriousness though, you can't check-in for a code share flight operated by AA on the LY website. You need the AA record locator and the AA site will let you check-in online.
Is there any reason i can't check in with El Al for a trip JFK-ZUR, ZUR_TLV?
Could this be the case: I had a reservation by AA (maybe award) that included an LY flight. Reservation was changed and AA issued a new E-ticket. I was not able to OLCI with LY (LY requires E-ticket number as access to OLCI).
I called LY, they checked... and said: OOPS it was not updated on some system. Try in 1 hour. After 1 hour I could OLCI.