$173 Cheap Delta flights Duluth (DLH) to Seattle (SEA)

You’ll discover affordable return Delta Air Lines flights from $291 from DLH to SEA by organizing your results from “Price (lowest to highest)” on Expedia. Or search for deals from $173 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.

Browse for round-trip or one-way flights to Seattle in January or February. You could find lower fares with Delta Air Lines during these off-peak travel months.

Look for cheap Delta Air Lines flights from Duluth Intl. Airport (DLH) to Seattle - Tacoma Intl. Airport (SEA) one to three months ahead of your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and journey, the ideal day to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**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.

To figure out if there’s a direct journey from DLH to SEA with Delta Air Lines or another airline, check the “Nonstop” box when browsing for flights.

To find the earliest departures from DLH to SEA with Delta Air Lines, filter your search by “Early Morning” and “Morning.” Booking an early flight generally means you’ll experience fewer 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.

Seattle - Tacoma Intl. Airport (SEA) is the main Seattle gateway for Delta Air Lines flights from Duluth Intl. Airport (DLH).

With a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is a favorite for many travelers flying from DLH to SEA. What’s more, if you’re a Delta SkyMiles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can go toward future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You can usually cancel or modify your flight, although there may be additional charges if you booked over 24 hours ago. Need flexible options? Use Expedia’s “Changes included” or “No cancel fee” filter to find flights that won’t charge extra if you need to adjust your plans. To make changes, visit “Trips,” select your flight and click on “Manage Booking” for more details.