Direct (non-stop) flights from Denver (DEN) to SeaTac (SEA)
Find comprehensive flight information, schedules, and booking details for direct flights from Denver (DEN), US to SeaTac (SEA), US. This popular route is operated by 5 airlines, offering multiple daily departures.• Flight Duration: 2h 50m - 3h 16m (average flight time)• Distance: 1028 miles (1654 km) (air miles between airports)• Daily Flights: 8-20 flights (scheduled departures per day)
Denver (DEN)
US
SeaTac (SEA)
US
FLIGHT TIME
2h 50m - 3h 16m
FLIGHT DISTANCE
1028 miles (1654 km)
3h 0m - 3h 14m
00:25
22:35
1028 miles (1654 km)
March
5 (Show)
106
Flight Schedule
December 2025
Airlines with direct flights from Denver (DEN) to SeaTac (SEA)
Route Insights
Duration variability: Flight duration on this route can vary based on aircraft type, wind conditions, and airline scheduling. Average duration is 2h 50m - 3h 16m.
Pricing patterns: March typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 6:00, 8:00, 12:00, offering more flight options and potentially better connections.
Denver (DEN) - SeaTac (SEA) flight price statistics
$165
ApproximateThe numbers are average prices found based on user searches for direct flights between the airports. It's calculated from the cheapest prices found per month for a round-trip with 1 adult and can vary depending on the amount of data we have for this particular route.
$67
Jan$53
Feb$39
Mar$39
Apr$402
May$413
Jun$224
Jul$130
Aug$124
Sep$128
Oct$128
Nov$228
DecRelated Information
Airports: Denver (DEN) • Seattle Airport (SEA)
Airlines operating this route: United Airlines (UA), Delta Air Lines, Alaska Airlines, WN - Southwest Airlines
Frequently Asked Questions
How many flights operate from Denver (DEN) to Seattle (SEA)?
There are 18 direct flights operating from Denver (DEN) to Seattle (SEA). Approximately 8-20 flights daily.
Which airlines operate flights from Denver (DEN) to Seattle (SEA)?
4 airlines operate on this route: United Airlines, Delta Air Lines, Alaska Airlines, Southwest Airlines.
How long is the flight from Denver (DEN) to Seattle (SEA)?
The flight duration from Denver (DEN) to Seattle (SEA) is approximately 2h 50m - 3h 16m.
What is the distance from Denver (DEN) to Seattle (SEA)?
The distance from Denver (DEN) to Seattle (SEA) is 1028 miles (1654 km).
What is the flight time range for this route?
Flight times on this route range from 3h 0m - 3h 14m.
What are the earliest and latest flight departure times?
The earliest flight departs at 00:25 and the latest flight departs at 22:35.
What is the cheapest month to fly from Denver (DEN) to Seattle (SEA)?
March is typically the cheapest month to fly on this route.
How many flights operate per week on this route?
Approximately 106 flights operate per week from Denver (DEN) to Seattle (SEA).
What types of aircraft operate on this route?
This route is served by Boeing 737-800 Passenger, Boeing 737-900 (winglets) Passenger/BBJ3, Boeing 737-800 (winglets) Passenger/BBJ2, Boeing 737MAX 9 Passenger, Airbus A320 and 4 more aircraft types.
What is the average flight price from Denver (DEN) to Seattle (SEA)?
The average flight price for a round-trip ticket from Denver (DEN) to Seattle (SEA) is approximately $165 USD. Prices can vary based on booking time, season, and airline.
When is the best time to book flights from Denver (DEN) to Seattle (SEA) for the lowest prices?
March is typically the cheapest month to fly from Denver (DEN) to Seattle (SEA). Booking in advance and avoiding peak travel seasons can help you find better deals.
How many airlines offer flights from Denver (DEN) to Seattle (SEA)?
4 airlines offer direct flights from Denver (DEN) to Seattle (SEA), providing travelers with multiple options for scheduling and pricing.
How far is Seattle (SEA) from Denver (DEN)?
The distance from Denver (DEN) to Seattle (SEA) is 1028 miles (1654 km). This is a long-haul flight route.
How long does it take to fly from Denver (DEN) to Seattle (SEA)?
The flight time from Denver (DEN) to Seattle (SEA) is approximately 2h 50m - 3h 16m. Actual flight duration may vary based on weather conditions, aircraft type, and routing.
What city does Seattle (SEA) serve?
Seattle (SEA) serves Seattle, US.