Cheap United flights Denver (DEN) to Seattle Paine Field Intl. Airport (PAE)

You can find budget-friendly return United Airlines flights from DEN to PAE by filtering your results from “Price (lowest to highest)” on Expedia. Or look for bargains 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.

Look for round-trip or one-way flights to Seattle in January or February. You could find an affordable fare with United Airlines during these off-peak travel months.

Search for cheap United Airlines flights from Denver Intl. Airport (DEN) to Snohomish County - Paine Field Airport (PAE) one to three months prior to your departure date. 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. Regardless of fare class and journey, the best day to book a domestic flight is usually Sunday and the most expensive day is typically 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 find out if there’s a direct journey from DEN to PAE with United Airlines or another carrier, use our “Nonstop” filter when browsing for tickets.

Sort your results by “Early Morning” and “Morning” to find the earliest flights from DEN to PAE. Taking off early means flight cancellations are less likely.**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.

United Airlines flights from Denver Intl. Airport (DEN) to Seattle come in to Snohomish County - Paine Field Airport (PAE). This is the main entry point to this city.

With a rewarding loyalty program, United Airlines is a popular choice for many passengers departing from DEN to PAE. Plus, if you’re a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Typically, you can cancel or modify your flight, although additional charges may apply if you booked over 24 hours ago. Need to keep your options open? Use our “Changes included” or “No cancel fee” filter to find flights that won’t penalize you if you need to alter your plans. To make modifications, go to “Trips,” select your flight and click on “Manage Booking” for further information.