Air France and Lufthansa have round-trip flights from Seattle (SEA) to Beirut (BEY) for $621-$656 with a connection. Flights October to March. Extended weekends available.
Fare may operate as a Untied/Lufthansa code-share.
Fare is Regular Economy. Not Basic. Carry-on, checked bag, and seat selection are allowed without additional fee.
Priceline has “Express Deals” for about $645. With “Express Deals” the airline and exact flight are hidden until after purchase and those purchases are final. There is no 24-hour free cancellation for “Express Deals”. The flight is guaranteed to be on a major airline. Be sure to select the deal with 0 to 1 stops and a layover less than 4-hours.