Direct (non-stop) flights from SeaTac (SEA) to Denver (DEN)
Find comprehensive flight information, schedules, and booking details for direct flights from SeaTac (SEA) to Denver (DEN). This popular route is operated by 5 airlines, offering multiple daily departures.• Flight Duration: 2h 30m - 2h 59m (average flight time)• Distance: 1028 miles (1654 km) (air miles between airports)• Daily Flights: 10-20 flights (scheduled departures per day)
SeaTac (SEA)
Denver (DEN)
FLIGHT TIME
2h 30m - 2h 59m
FLIGHT DISTANCE
1028 miles (1654 km)
2h 30m - 2h 57m
05:00
20:35
1028 miles (1654 km)
March
5 (Show)
121
Flight Schedule
December 2025
Airlines with direct flights from SeaTac (SEA) to Denver (DEN)
Route Insights
Duration variability: Flight duration on this route can vary based on aircraft type, wind conditions, and airline scheduling. Average duration is 2h 30m - 2h 59m.
Pricing patterns: March typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 5:00, 8:00, 12:00, offering more flight options and potentially better connections.
SeaTac (SEA) - Denver (DEN) flight price statistics
$122
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$40
Feb$36
Mar$45
Apr$70
May$246
Jun$247
Jul$130
Aug$98
Sep$128
Oct$108
Nov$248
DecRelated Information
Airports: SEA • DEN Airport
Airlines operating this route: Southwest Airlines (WN), United Airlines, Delta Air Lines, AS - Alaska Airlines
Frequently Asked Questions
How many flights operate from SEA to DEN?
There are 16 direct flights operating from SEA to DEN. Approximately 10-20 flights daily.
Which airlines operate flights from SEA to DEN?
4 airlines operate on this route: Southwest Airlines, United Airlines, Delta Air Lines, Alaska Airlines.
How long is the flight from SEA to DEN?
The flight duration from SEA to DEN is approximately 2h 30m - 2h 59m.
What is the distance from SEA to DEN?
The distance from SEA to DEN is 1028 miles (1654 km).
What is the flight time range for this route?
Flight times on this route range from 2h 30m - 2h 57m.
What are the earliest and latest flight departure times?
The earliest flight departs at 05:00 and the latest flight departs at 20:35.
What is the cheapest month to fly from SEA to DEN?
March is typically the cheapest month to fly on this route.
How many flights operate per week on this route?
Approximately 121 flights operate per week from SEA to DEN.
What types of aircraft operate on this route?
This route is served by Boeing 737MAX 8 Passenger, Airbus A320, Airbus A220-100, Boeing 737-900 (winglets) Passenger/BBJ3, Airbus A319 and 4 more aircraft types.
What is the average flight price from SEA to DEN?
The average flight price for a round-trip ticket from SEA to DEN is approximately $122 USD. Prices can vary based on booking time, season, and airline.
When is the best time to book flights from SEA to DEN for the lowest prices?
March is typically the cheapest month to fly from SEA to DEN. Booking in advance and avoiding peak travel seasons can help you find better deals.
How many airlines offer flights from SEA to DEN?
4 airlines offer direct flights from SEA to DEN, providing travelers with multiple options for scheduling and pricing.
How far is DEN from SEA?
The distance from SEA to DEN is 1028 miles (1654 km). This is a long-haul flight route.
How long does it take to fly from SEA to DEN?
The flight time from SEA to DEN is approximately 2h 30m - 2h 59m. Actual flight duration may vary based on weather conditions, aircraft type, and routing.