Here's how:
Alitalia is running a promo until December 5th where you get 20% off their flights with code FRENZYTIME
Must book 1 person at a time to get the 20% off!
Valid for journeys made between 01/12/2016 and 28/03/2017
They are also having a promo that lets people bring 2 suitcases when flying TLV to north america
Amex has an offer for $160 credit when you spend $800+ on Alitalia.com
Example:
TLV-NYC on Jan 25 (1h 25m stop in FCO)
return on feb 2 (2h 10m stop in FCO)
price per person: $560
20% off brings the price to $449 per person
Book 2 separate tickets for $449 each to qualify for the amex promo and get $160 credit which brings the price for 2 people to $738.
Business class for the same dates is $2243. 20% off gets you to $1795 and the AMEX credit of $160 brings the total to $1635 for one person.