The short hop from Portland to Seattle is one of the most well-traveled air corridors in the Pacific Northwest, linking two cities that share a regional identity yet offer distinctly different urban experiences. Flights from PDX to SEA cover roughly 145 miles and typically last just under an hour, making it one of those routes where you barely have time to finish a coffee before the cabin crew prepares for landing. For many travelers, the flight serves as a gateway to onward connections at Seattle-Tacoma International Airport, though Seattle itself is more than worth a dedicated visit. Alaska Airlines dominates this route with numerous daily departures, offering a shuttle-like frequency that makes last-minute travel surprisingly convenient. Delta Air Lines also operates several flights throughout the day, giving passengers solid options when it comes to scheduling and loyalty program preferences. On clear days, window seat passengers are treated to sweeping views of Mount St. Helens, Mount Rainier, and the volcanic spine of the Cascades, a visual experience that rivals routes many times the distance. The question of when to fly depends largely on what you plan to do upon arrival. Seattle shines brightest from June through September, when the infamous gray skies give way to warm sunshine and the city comes alive with outdoor festivals, farmers markets, and waterfront dining. Autumn brings its own charm with fall foliage and fewer tourists, while winter appeals to those heading to nearby ski resorts like Stevens Pass or Snoqualmie. Spring can be unpredictable but rewards visitors with blooming gardens and mild temperatures. Because the route between Portland and Seattle is so short, many travelers weigh flying against driving or taking the Amtrak Cascades train. The train offers scenic river views along the Columbia River Gorge and through farmland, but at roughly three and a half hours, it demands more of your schedule. Flying makes the most sense when connecting to other flights or when time is a priority. A practical tip for this route is to pack light and stick with carry-on luggage. The quick turnaround means checked bags can sometimes be delayed, and traveling with just a carry-on lets you move through both airports with ease. Portland International Airport is consistently praised for its efficient layout and excellent food options, so arriving early is never a chore. Whether you are a business commuter making the trip weekly or a weekend explorer heading north to explore Pike Place Market and the neighborhoods of Capitol Hill, this Pacific Northwest corridor remains one of the most practical and scenic short flights on the West Coast.
Flying from Portland to Seattle: A Quick Northwest Hop
About this route
The flight from Portland to Seattle is one of the shortest you'll take in the Pacific Northwest — just under an hour in the air. Alaska Airlines dominates this route, though Delta and other carriers also operate frequent daily service between PDX and SEA. That frequency is good news for last minute travelers, as open seats are often available even on short notice. The route follows the I-5 corridor north, and on clear days you may catch views of Mount Rainier, Mount St. Helens, or the Cascades. Seattle is a year-round destination, though summer months bring the driest weather and longest days. Fall offers fewer crowds and lower fares. Because this is such a popular commuter route, last minute fares tend to stay reasonable compared to longer domestic flights. Many travelers also use SEA as a connecting hub for flights to Alaska and Asia.