Riyadh Air, the new airline from Saudi Arabia, launched its daily flights between Riyadh and London in October last year (read more here) with a spare aircraft. Tickets were not available for these services.

The airline, however, is set to receive its first and much-delayed Boeing 787-9 aircraft shortly, which will begin commercial service between Riyadh and London on July 1st, and for which you can also buy a ticket. The airline has not yet confirmed any additional destinations, beyond that it should shortly start service to Dubai.
A great solo travel tip spotted this week on LoyaltyLobby.