Alaska Airlines is expanding its international network with a new nonstop route from Seattle (SEA) to Seoul, South Korea. The service begins September 12, 2025, and to celebrate, the airline is offering travelers a limited-time Seattle to Seoul flights deal that’s hard to ignore.
Through September 12, fliers who purchase an economy seat on the Seattle-to-Seoul route can book a second ticket for a travel companion by paying only the taxes and fees. The buy-one-get-one promotion makes it easier for couples, families, and friends to explore South Korea together without stretching their budgets.
The Details of the Deal
The savings are significant. For September travel, fares start as low as $229 one-way, plus about $160 in taxes and fees. To unlock the discount, travelers must use the promo code SEOULBOGO when searching for flights on Alaska’s website.
The deal isn’t limited to cash fares. Alaska Airlines is also offering one-way award flights starting at just 20,000 Atmos points. Like the BOGO offer, award tickets must be booked by September 12, 2025, to qualify. Both promotions are valid only for itineraries of two travelers and apply to flights between September 12 and December 15, 2025.
Why This Matters for Travelers
The new nonstop service creates a direct link between the Pacific Northwest and one of Asia’s most dynamic cities. Seoul is a hub for culture, technology, and food, offering visitors everything from centuries-old palaces and markets to K-pop, high fashion, and world-class dining. For travelers who have been waiting for a more affordable way to get there, this Seattle to Seoul flights deal makes the journey much more accessible.
The timing is also ideal. Autumn in South Korea is known for its mild weather and stunning fall foliage, while early winter brings holiday festivals and seasonal food experiences. The travel window between September and December gives fliers flexibility to plan the kind of trip that best fits their interests.
What to Keep in Mind
The offer does come with a few conditions. Tickets must be booked no later than September 12, 2025, and availability is limited, especially during peak dates. Both the BOGO and award deals apply only when two travelers are booked together on the same itinerary. Taxes and fees are not included in the promotion and should be factored into the total cost.
Travelers should also double-check baggage rules and other add-on charges before finalizing their booking. While the fares are low, extras such as seat selection or checked luggage may increase the final price.
Final Thoughts
Alaska Airlines’ Seattle to Seoul flights deal is one of the best international promotions of the year. With nonstop service, low fares, and a generous buy-one-get-one offer, the route opens the door for more Americans to experience South Korea.
If Seoul is on your list, this is the moment to book. Whether you’re using cash or Atmos points, the promotion ends September 12, 2025, and covers travel through mid-December. With savings this steep, seats won’t last long.