$209 Cheap Alaska Airlines flights Des Moines (DSM) to Seattle (SEA)

You can find cheap round-trip Alaska Airlines flights from $417 from DSM to SEA by filtering your results from “Price (lowest to highest)” on Expedia. Or look for bargains from $209 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines flights to Seattle are often more affordable in the off-peak months of January and February. Whether you’re after a one-way or round-trip ticket, you could land a better deal then.

For cheap Alaska Airlines fares from Des Moines Intl. Airport (DSM) to Seattle - Tacoma Intl. Airport (SEA), start searching one to three months before your intended departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect what you pay. Sunday tends to be the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Fill in your dates, hit search and use the “Nonstop” filter on Expedia to find any direct flights from DSM to SEA with Alaska Airlines or other carriers.

Sort your results by “Morning” and “Early Morning” to browse the earliest departures from DSM to SEA. Taking off early means you’re less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Get on an Alaska Airlines flight from Des Moines Intl. Airport (DSM) to Seattle, and you’re most likely to land at Seattle - Tacoma Intl. Airport (SEA). This is the airline’s main hub in this city.

Offering top-tier customer service and a rewarding loyalty program, Alaska Airlines is a favorite for many passengers heading from DSM to SEA. What’s more, if you’re a Mileage Plan and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which you can put toward future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your ticket type, a fee is typically charged if you cancel or change your booking more than 24 hours after it’s been confirmed. To secure flexible plane tickets, select our “No cancel fee” or “Changes included” filter while looking for flights. To learn more about changing or canceling your reservation, head to “Trips,” select your flight and click on “Manage Booking.”