flight_takeoff SEA → DEN

Cheap Flights from Seattle to Denver

Compare fares on the medium-haul flight from Seattle to Denver — a southeastbound route of about 1,022 miles, typically flown nonstop in around 2h 35m.

Fares from $93 one-way, economy · as of Jul 7, 2026

straighten

Distance

1,022 mi

1,645 km

schedule

Est. flight time

2h 35m

nonstop

flight

Nonstop service

Available

5 carriers

language

Time difference

1 hour ahead

Denver

Flying from Seattle to Denver

Flights from Seattle Tacoma International Airport (SEA) to Denver International Airport (DEN) cover roughly 1,022 miles (1,645 km) on a southeastbound heading, a nonstop flight of about 2h 35m. The route crosses 1 time zone — Denver is 1 hour ahead of Seattle. It's served by 5 airlines.

Lets Fly Travel compares live fares across hundreds of airlines to find the best deal on this route — and every booking is reviewed by a real travel agent before ticketing.

Airlines on this route

Airlines with recent nonstop fares on the SEA–DEN route (as of Jul 7, 2026):

flightAlaska flightAmerican flightDelta flightFrontier flightJetBlue flightSouthwest flightUnited

Airline availability and fares change over time — search your dates for current options.

Best time to fly Seattle to Denver

Fare patterns and travel conditions vary by season. Here's what to expect on the SEA–DEN route throughout the year.

Jan–Feb

Winter weekdays on the Seattle–Denver route are often lightly booked — a good window for budget-conscious travelers.

Mar–May

Spring demand picks up, especially around school break periods. Searching Tuesday–Thursday departures usually surfaces the cheapest fares.

Jun–Aug

Summer travel is busy on this medium-haul flight. Booking 3–5 weeks out and avoiding Friday/Sunday departures helps keep costs down.

Sep–Oct

Post-summer shoulder period often brings the lowest fares on the SEA–DEN route. Weather is usually still pleasant at both ends.

Nov–Dec

Holiday travel between Seattle and Denver books up fast. Set a fare alert and book as soon as you confirm your plans.

flight_land Arriving at

Denver International Airport

Denver is served by Denver International Airport (IATA: DEN , ICAO: KDEN). Allow time for baggage claim and ground transportation after landing.

IATA Code

DEN

Flight Time

~2h 35m

Distance

1,022 mi

tips_and_updates Arrival tips

›Check in online to save time at the airport.
›Arrive 2 hours before departure.
›Compare fares across several nearby dates for best value.

Seattle to Denver — FAQs

How long is the flight from Seattle to Denver? expand_more

A nonstop flight from Seattle (SEA) to Denver (DEN) takes approximately 2h 35m, covering a distance of about 1022 miles (1645 km). Actual flight time varies with aircraft, routing and winds.

How much is a flight from Seattle to Denver? expand_more

Recent one-way economy fares from Seattle to Denver have started around $93 (as of July 2026). Prices change frequently, so search live results for current fares.

Which airlines fly from Seattle to Denver? expand_more

Airlines with recent nonstop fares on the SEA–DEN route include Alaska, American, Delta, Frontier, JetBlue, Southwest, United. Use our search to compare current carriers, schedules and fares.

Is there a nonstop flight from Seattle to Denver? expand_more

Yes. The SEA–DEN route has nonstop service. Nonstop availability can vary by season and day of week, so check live results for your dates.

How far is Denver from Seattle? expand_more

The distance from Seattle (SEA) to Denver (DEN) is about 1022 miles (1645 km) as the crow flies.

What is the time difference between Seattle and Denver? expand_more

Denver is 1 hour ahead of Seattle. Factor the time change into your arrival and connection planning.

When is the best time to book flights from Seattle to Denver? expand_more

For domestic routes like Seattle to Denver, booking about 1–3 months ahead and choosing mid-week departures usually finds the best prices. Avoid peak Friday and Sunday travel where possible.