$79 Find Cheap Flights from Seattle to Denver - Compare and Save

While smoking is not allowed inside any of the terminals at Seattle-Tacoma International Airport, there are two locations outside where you may smoke. The first is near the north end of the baggage claim level, and the second is across from the small parking lot. To determine if you are allowed to smoke, look for ashtrays and double check that there are no airport signs prohibiting it.

In addition to periodic live music performances, Seattle-Tacoma International Airport also has a diverse Art Walk that is 0.5 mi long and begins near Gate A 14. There are also several Digiboo self-service kiosks located throughout the airport that allow travelers to download movies and televisions shows directly onto their portable devices.

There are several pet relief zones located in the centers of Terminals A, B, and C at Denver International Airport and they provide pet owners with waste disposal bags, trashcans, and running water. Additionally, there is a Paradise 4 Paws Pet Resort adjacent to the main terminal that offers both pet boarding and grooming services.

Boulder Beer Tap House is located in the Jeppesen Terminal of Denver International Airport and serves a selection of burgers, appetizers, and salads, while Cantina Grill is located nearby and has a Mexican-inspired menu. The Denver Chophouse is located near the A Gates and is known for its vegan and gluten-free meals.

When flying from Seattle to Denver, each passenger adds an average of 2304 lbs of carbon dioxide to the greenhouse effect. However, you have the option of flying more sustainably with Alaska Airlines and Frontier, as these two airlines provide flights that produce 52% less carbon dioxide emissions per passenger on this route.

SEA provides accessible services for individuals with special needs. The airport has wheelchair-accessible elevators, restrooms, shuttle buses, and parking spots. The airport provides boarding and deplaning assistance, wheelchair service, and gate access assistance. SEA also provides magnifying glasses, adjustable-height chairs, earplugs, and Braille signs.

DEN features several public transit alternatives. The RTD Airport Route connects downtown commuters to the airport. This bus route features citywide stops. The Flatiron Flyer operates from the airport to downtown Denver and back, with many stops. The University of Colorado A Line runs every 15 minutes between the airport and Union Station. You can also take a taxi from DEN to downtown.

In SEA, finding a parking spot is a breeze. Visitors to Denver can choose from a number of parking alternatives, including short-term, hourly, economy, and valet parking. The parking garage adjacent to the main terminal houses these parking alternatives. You can also make your parking arrangements ahead of time with the airport's online parking reservation system.

Yes, DEN does provide car rental services. At the airport, you can choose between Avis, Alamo, Budget, National, Dollar, Enterprise, and Hertz rental providers. On the lower level of the main terminal, toward the airport's western side, you'll find the car rental providers. If you want to ensure that your car choice is waiting for you on arrival, you may reserve it online in advance.

Yes. You can board a train to SEA You can take the Link Light Rail to the airport from the University of Washington and downtown Seattle. It is about a 30 minutes ride, departing every 6–15 minutes throughout the day. The Link Light Rail's Red Line connects the airport station with Beacon Hill and Capitol Hill neighborhoods.

Among airlines operating Seattle to Denver flights:

• Frontier: offers free seat selection
• Alaska Airlines: offers extra legroom; offers free seat selection
• United Airlines: offers extra legroom; offers free seat selection
• Delta: offers extra legroom; offers free seat selection
• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

6 airlines operate flights between Seattle and Denver. The airlines offering nonstop flights on this route include:

• United Airlines
• Alaska Airlines
• Southwest
• Delta
• Frontier
• American Airlines

Flights from Seattle to Denver usually depart from Seattle/Tacoma Intl (SEA) and arrive at Denver Intl (DEN).

Here are some options for this route, based on selected ticket types and cabin classes:

• Frontier: a cabin bag and a checked bag in Economy Class
• Alaska Airlines: a cabin bag and a checked bag in Economy Class
• United Airlines: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Four cabin classes are available on flights from Seattle to Denver:

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $199 round-trip via Ontario (ONT), compared to $250 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $35–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Airbus A321neo family is used most often on this route, operated mainly by United Airlines and Frontier. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

Connecting flights from Seattle to Denver most commonly pass through:

• Ontario (ONT) - 58% of one-stop connections
• Salt Lake City (SLC) - 42% of one-stop connections
Together, these airports account for 100% of one-stop bookings on this route.

On the Seattle to Denver route, being flexible with your departure day can save you up to 25%. Saturday is the cheapest day at $234 round-trip on average, while Sunday is the most expensive at $309: a $75 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Seattle to Denver route, 15% of flights were delayed in the past 3 months, with delays averaging 2 hours 22 minutes.

Morning is the busiest departure period on Seattle to Denver flights, with 42% of flights leaving in that window. Afternoon departures account for 41%, evening flights for 17%, and night flights for 0%.

Some of the most popular sights in Denver are Colorado Convention Center, Union Station Denver and Coors Field. These are among the most viewed places in Denver on KAYAK.

These are the earliest and latest flight times available from Seattle to Denver:

• Earliest: departs at 5:00 am and lands at 7:48 am
• Latest: departs at 9:15 pm and lands at 12:03 am.

The flight takes about 2h 48m.

Last-minute fares on this route - booked within 2 weeks of departure - run 37% above the route average of $250. Book 5 weeks before departure for the lowest fares.

A nonstop flight from Seattle to Denver takes 2h 48m, covering 1,022 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $138 to $881. That means the highest observed fare was about 6x higher than the lowest one.

One-way fares from Seattle to Denver are currently lower than usual. Average one-way flight prices are about $129, which is 27% below the typical average for this route.

United Airlines is slightly above the route average for timely arrivals, while Frontier has a lower on-time arrival rate. On-time arrival rates on Seattle to Denver flights are:

• United Airlines: 92% on time
• Frontier: 87% on time
• Alaska Airlines: 85% on time

Overall, flights on this route are on time 85% of the time on average.

Night flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 7h 38m, compared with 8h 36m via Ontario (ONT).

Denver is 1 hour ahead of Seattle (Mountain Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

Denver Intl Airport (DEN) hosts 5 major car rental companies, with daily rates starting from around $16 for economy cars. Top options include:
· Routes Car & Truck Rentals
· Ace
· NU Car
· Europcar
· Hertz

Round-trip flights from Seattle to Denver range from $168 to $338, with an average of $250 over the past 12 months. Anything below $168 counts as a good deal.

Three airlines offer in-flight Wi-Fi on Seattle to Denver flights:

• • Alaska Airlines
• • Delta
• • JetBlue