Though the flight isn't lengthy, it's a wierd (in an effective way) flying working experience that travel nerds must be dying to try.  Having said that, it is vital to note that redeeming mileage with Delta may be highly-priced, and recent variations to your SkyMiles program are sure to possess https://businessflightshop.co.uk/blog/how-can-you-plan-short-day-trips-in-portugal-this-winter/