Reaching Portland, Maine from Millbrae involves a long-haul flight from San Francisco International Airport to Portland International Jetport. You will likely connect through a hub like Boston or Newark. The total distance is over 4,900 kilometers. Once in Portland, the city is highly walkable, especially the Old Port district. This journey takes you from the Pacific Coast to the rugged Atlantic shoreline.
Total Distance: 4,950 km driving distance; 4,400 km straight-line air distance.
If flights to PWM are expensive, fly to Boston Logan and take the Concord Coach Lines bus to Portland.
July to August for warm coastal weather and lobster season.