It looks like they can attack anytime.
Distance from Tehran to Tel Aviv
Distance is 1588 kilometers or 987 miles or 858 nautical miles
http://www.timeanddate.com/worldclock/distanceresult.html?p1=246&p2=676
Lockheed Martin F-16 Specs
Length: 49 ft, 5 in.
Span: 32 ft, 8 in.
Takeoff weight: 37,500 lbs
Max speed: 1,500 mph
Max altitude: 50,000 ft plus
Range: 2,425 mi
Engine: One 27,000-lb-thrust Pratt & Whitney F100
That’s the ferry range mentioned, not the combat radius, which typically includes air to air missiles and (heavy) air to ground munitions. The combat radius of the F-16 is much lower, though they can still can hit Iran with their CFTs and tanker support.
http://www.globalsecurity.org/military/systems/aircraft/f-16-specs.htm
Divide the range numbers in 2, if not 3, for combat radius (barring refueling).
Personally, I would develop massive cheap drones, in large, large, numbers (say 1000), and have them kamikaze it after key radar and missle stations hit by missle.