Southwest Airlines plummeted to bottom of the pack in August in the on-time arrivals derby, as perennial frontrunner Delta Air Lines soared to a commanding victory among the four major domestic carriers, according to monthly results released Tuesday by airline data behemoth OAG.
Despite the horrors of last month’s Hurricane Harvey, which disrupted Delta’s operations less than it did United’s, Delta finished August with an impressive 83.8 percent of flights arriving on time.
The United States Department…