Southwest Airlines has gone back to boarding passengers in lots of 30, middle seats on many airlines are again being sold, and snacks and drinks are increasingly being served again, prompting many passengers on US airlines to wonder, pandemic, what pandemic?

Southwest’s boarding policy changed on March 15 with spokeswoman Brandy King explain that when Southwest started boarding in smaller groups last May, face masks weren’t as common, and people were just getting accustomed to social distancing in public places. Until then, the airline had restricted boarding to 10 passengers at a time to create more space between them.

Meanwhile, several other airlines that once blocked middle seats now sell out flights if they can. The last holdout is Delta Air Lines, which has extended empty middle seats through April 30.

A search of Delta flights in May showed middle seats for sale. A Delta spokesman said the airline hasn’t decided whether to extend the middle-seat ban, and if it does, passengers in middle seats can be moved to window and aisle seats.

Many airlines are also bringing back snacks and drinks after halting service last year to limit contact between flight attendants and passengers. Some, but not all, have resumed selling alcohol – Southwest is still dry; other airlines vary service by flight length and whether passengers are in first-class.

Tuesday marked the 13th straight day that more than 1 million passengers went through US airport checkpoints, according to the US Transportation Security Administration. Traffic is still down about half from the same period in 2019, however.