Which city does the airport code PWM refer to?

The airport code PWM refers to Portland, Maine. This code is derived from the first letters of "Portland" and "Maine," making it a logical and straightforward identifier for the city’s airport, Portland International Jetport. Understanding airport codes often involves familiarity with which letters represent specific locations, and in this case, it’s essential to recognize that PWM is uniquely associated with Portland, ME, as it does not correspond to the other cities mentioned in the options.