Traveling on Southwest Air this summer? Say safe travels and Bon Voyage to Mr Peanut! No more peanuts on Southwest Airlines! Yesterday (July 31) was the last day. They say they are worried about too many peanut allergies. The will still offer free snacks. Mainly pretzels. Some folks are saving the old bags of peanuts as collector items! Check this link for the FREE snacks provided on Southwest and other airlines.