Vuelos de Frontier Airlines de Denver (DEN) a Seattle (SEA) desde $34

It’s prudent to know about any quarantine requirements and travel advice reports in effect in your destination city. Ensure you go to our Covid-19 Travel Advisor for up-to-date info on flying to SEA.

If you’re flying between DEN and Sea-Tac Airport with Frontier Airlines, you’ll most likely be taking off from the main terminal. Your airline should be able to let you know exactly which terminal you’ll be arriving at.

With Frontier Airlines offering direct flights from Denver Airport to SEA, your next great adventure is just a flight away. Say goodbye to the stress, hassle and delays that often come with layovers, and book your seat today.

As it will take around 4 hours and 7 minutes for your Frontier Airlines flight to get from Denver Intl. Airport (DEN) to Seattle - Tacoma Intl. Airport (SEA), consider packing some fun travel games in your carry-on. You never know — the person sitting next to you might love the chance to play to break up the journey.

When you zip through the clouds between DEN and SEA with Frontier Airlines, you’re likely to be doing it aboard the Airbus A320neo. The carrier also operates the Airbus A321 on this flight path.

Planning a trip between DIA airport and SEA is a breeze. There are no fewer than 7 Frontier Airlines flights connecting DEN and SEA each week.

For more info about changing your flight to Seattle - Tacoma Intl. Airport (SEA), 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.