Alaska Airlines has launched its annual three-day fall sale, with flights starting at $39 one-way or 4,000 miles. The sale runs through tomorrow at 23:59 Pacific Time and is valid for travel from tomorrow to December 18. Because so many routes are on sale, Alaska Airlines has made it easier for customers to narrow their options down by choosing the departure city. As there are too many options to highlight, we chose a select few departure cities for this story.