Airline Stock Roundup: DAL’s Environmentally-Friendly Deal, RYAAY’s Traffic & More Posted byMaharathi Basu October 6, 2021 Leave a comment on Airline Stock Roundup: DAL’s Environmentally-Friendly Deal, RYAAY’s Traffic & More Delta (DAL) inks a deal worth more than $ 1 billion to reduce carbon emissions. Ryanair’s (RYAAY) September traffic surges in excess of 100%.