Vuelos de United de Seattle (SEA) a Denver (DEN) desde

For information on any present DEN quarantine requirements and travel advice, visit the Covid-19 Travel Advisor. Look before you arrange your flight, so you don’t get caught out en route.

While we can’t say for certain exactly which terminal your United Airlines flight from SEA to Denver Airport will board from, we can tell you that it’s highly likely you’ll be disembarking at the main terminal.

In short, yes. Book a direct flight with United Airlines from Seattle - Tacoma Intl. Airport (SEA) to Denver Airport, and you won’t have to worry about a stopover or catching a connecting flight.

Your United Airlines flight should get you from SEA to DEN in about 3 hours and 48 minutes. If you’re not a fan of speaking to other passengers while you’re airborne, don’t stress — you won’t have to chitchat for too long.

United Airlines normally operates the Boeing 737-800 or the Boeing 737 MAX 9 between Sea-Tac Airport and DEN.

You can decide between around 5 flights per day with United Airlines from Sea-Tac Airport to Denver Airport.

For more info about changing your flight to DIA airport, please visit our Customer Service Portal.

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.