Southwest Airlines has limited the number of seats they’d sell on each flight, so that no one would have to be in a middle seat and everyone would have some space between them. They’ve been in a camp with Delta, Alaska, and JetBlue offering customers greater comfort (both physical, and peace of mind during the pandemic) and in opposition to United Airlines and American that have been booking to full capacity.
We’ve known that this strategy wouldn’t last, and even Delta has said their capacity limits – which only blocks most middles – would last through the Christmas and New Year holidays.
Southwest Airlines now says their sales caps will only last through the end of November and Thanksgiving travel. They will start to book to full capacity December 1.
Where prices are similar, then, and where you’re either comparing two non-stop flights or two connecting itineraries, Delta represents better value for December travel.