 CHICAGO, Nov. 19, 2020 GLOBE NEWSWIRE -- SP Plus Corporation SP, Nasdaq: SP, a leading provider of technology-driven mobility solutions for aviation, commercial, hospitality and institutional clients throughout North America, today announced the addition of Check N Fl y TM baggage check-in services exclusively for valet parking customers who are traveling on domestic flights with American Airlines or Delta Air Lines at William P. Hobby Airport HOU in Houston, Texas. 