The flights have a layover in Lisbon, Portugal in each direction, with a long layover on the inbound flight.
The price is for a Light ticket, which does not include checked luggage. Checked-in luggage for the return flight comes at an additional cost of €188. Still a very good deal, as this is a 13,699-mile journey so overall the cost is an extremely low 2.36 Cents Per Mile flown.
The best deals on this route are for March 2021. Availability is limited, and the offer is available at the time of the publishing of the post. Here is a sample itinerary in March 2021 (March 3 – March 20):