Beginning of main content
Trip Type
Flight 1
Flight 2
Flight 3
Flight 4
Flight 5
Due to coronavirus (COVID-19) travel advisories, some destinations may be unavailable for certain dates. Find out more.

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights


Amazing United DEN to SEA Flight Deals

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were $121 round trip and $64 one way. Prices and availability subject to change. Additional terms may apply.


Carrier Flight Depart DEN Arrive SEA Wed
8/5
Thu
8/6
Fri
8/7
Sat
8/8
Sun
8/9
Mon
8/10
Tue
8/11
Stops
UA 404 11:15 am 01:12 pm Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
UA 1823 01:55 pm 03:55 pm Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
UA 2223 07:35 pm 09:35 pm Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
UA 2502 05:25 pm 07:15 pm - Check fare - - - - - 0 stop(s)
UA 2559 01:50 pm 03:40 pm - - - - Check fare - - 0 stop(s)

FAQs about United Airlines Flights from DEN to SEA

What terminal is United Airlines at Denver Airport?

Flights routinely take off from the main terminal at Denver, CO Airport (DEN-Denver Intl.) if you've booked a ticket with United Airlines. Traveling to Seattle, WA Airport (SEA-Seattle - Tacoma Intl.)? Touch base with your airline (or do some online research) to see exactly which terminal you'll be exiting the plane at.

Are there United Airlines non-stop flights from DEN to SEA?

You'll be happy to hear there are. Lock in a nonstop flight with United Airlines from Denver, CO Airport (DEN-Denver Intl.) to Seattle, WA Airport (SEA-Seattle - Tacoma Intl.), and you won't have to stress about lengthy stopovers or missing your connecting flight.

How long is an United Airlines flight from DEN to SEA?

Bring that novel on board you've been desperate to read. A flight from Denver, CO Airport (DEN-Denver Intl.) to Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) with United Airlines takes around 4 hours and 10 minutes. It'll be enough time to immerse yourself in the plot.

What type of aircraft does United Airlines fly from DEN to SEA?

Thinking about booking a flight between Denver, CO Airport (DEN-Denver Intl.) and Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) with United Airlines? On this route, you'll usually be climbing aboard the Boeing 737-800 or the Boeing 737-900 type aircraft.

How many direct and indirect flights does United Airlines fly from DEN to SEA?

When journeying from DEN to SEA, you'll discover around 5 United Airlines daily flights to select from.

Flying Tips & Tricks How do I find my flight number?
  • Your itinerary contains essential information for your forthcoming trip, including your flight number. Not sure what it looks like? There's an IATA airline code at the beginning, which is usually a couple of letters then a single digit. Following that are several other numerals — your flight number.
How early can you check bags for a flight?
  • If you're jetting off on an international flight, you can usually check-in your bags three hours before a flight. For domestic services, two hours is standard. Why not remove some of the stress of traveling and get to the airport with plenty of time to spare? That way, you don't have to worry about missing the bag drop altogether. It generally closes 45 minutes prior to a domestic flight and one hour before internationals.

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.