Flights operate between Seattle (SEA) and Denver (DEN).
1 airline operates this route with 10-20 flights daily flights.
Average flight time is 2h 30m - 2h 59m.
Route distance is 1028 miles (1654 km).
Route Distance
1028 miles (1654 km)
Average Duration
2h 30m - 2h 59m
Airlines Operating This Route
United Airlines
Flight Frequency
Daily Flights
10-20 flights
Weekly Flights
121
Typical Departure Time Ranges
Earliest Departure
05:05
Latest Departure
19:13
Route Intelligence Dashboard
Overall Connectivity Score
70
GoodRoute Diversity
1
Direct Routes
United Airlines serves 1 destination from SEA
Weekly Frequency
35
Weekly Flights
Trend: Stable
Top 1 Most Frequent Routes - Details
| Route | Weekly Flights | Duration | Distance | Reliability |
|---|---|---|---|---|
| SEA → Denver (DEN) (DEN) | 35/week | 2h 30m - 2h 59m | 1,028 km | Very Stable |
Flight Schedule & Filters
United Airlines flights from SeaTac (SEA) to Denver (DEN)
United Airlines operates scheduled nonstop flights between SeaTac (SEA) and Denver (DEN). United Airlines operates 10-20 flights daily flights on this route.• 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)
US
Denver (DEN)
US
FLIGHT TIME
2h 30m - 2h 59m
FLIGHT DISTANCE
1028 miles (1654 km)
2h 42m - 2h 46m
05:05
19:13
1028 miles (1654 km)
March
1 (Show)
121
United Airlines Terminal Information & Contact
Departure Terminal - SeaTac (SEA)
Terminal: 1
Phone: 1-800-864-8331
Location: 1, Seattle, US
Arrival Terminal - Denver (DEN)
Terminal: 1
Phone: 1-800-864-8331
Location: 1, Denver, US
United Airlines Flight Schedule from SeaTac (SEA) to Denver (DEN)
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
UA2269 |  United Airlines | 05:05 | 08:50:00 | Airbus A320 |
UA1505 | United Airlines | 08:36 | 12:21:00 | Airbus A319 |
UA1263 | United Airlines | 12:00 | 15:46:00 | Airbus A320 |
UA757 | United Airlines | 15:48 | 19:30:00 | Boeing 737-900 Passenger |
UA1218 | United Airlines | 19:13 | 22:57:00 | Airbus A320 |
United Airlines Monthly Flight Calendar
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United Airlines Terminal Information
Departure Terminal at SeaTac (SEA):
• Terminal : United Airlines operates from this terminal
Terminal 1:
• United Airlines Terminal Phone: 1-800-864-8331
Arrival Terminal at Denver (DEN):
• Terminal : United Airlines operates from this terminal
Terminal 1:
• United Airlines Terminal Phone: 1-800-864-8331
Weather & Climate at Denver (DEN)
10.0°C
Avg Temperature52mm
Avg Rainfall11.5km/h
Avg Wind Speed52%
Avg HumidityBest Months to Visit
Challenging Months
12-Month Weather Overview
Wind Speed by Month
Humidity by Month
Best Time to Book Flights to Denver (DEN)
Best Booking Window
Book 2-3 months in advance for best prices
Booking Tip
Avoid booking during extreme weather months for better deals
Peak Travel Months
Expect higher prices and more crowds during these months. Book early to secure better rates.
Recommended Months
These months offer the best balance of weather, prices, and availability.
Monthly Booking Recommendations
Flight Price Trends for Denver (DEN)
Cheapest Months to Fly
Book flights during these months for the best deals and lowest prices.
Most Expensive Months
Prices are typically highest during these months. Consider booking well in advance or choosing alternative dates.
Price Trend Analysis
Prices are typically lower during shoulder seasons
Monthly Price Trends
Best Months to Fly United Airlines to Denver (DEN)
Best Months
Optimal conditions for travel with favorable weather, prices, and availability.
Shoulder Season
Transition periods with moderate conditions. Good balance of price and experience.
Challenging Months
These months may have less favorable conditions. Plan accordingly and book early.
Seasonal Insight
Best travel months: 2025-07, 2025-08, 2025-09
Seasonal Travel Calendar
United Airlines Contact Information and Customer Services
United Airlines Address
233 S. Wacker Drive
Chicago, IL 60606, United States
Customer Service Phone
+1-800-864-8331Official Website
united.comFrequently Asked Questions
How many United Airlines flights operate from Seattle (SEA) to Denver (DEN)?
United Airlines operates 5 flights from Seattle (SEA) to Denver (DEN).
What city does Denver (DEN) airport serve?
Denver (DEN) airport serves Denver, US.
How long is the United Airlines flight from Seattle (SEA) to Denver (DEN)?
The flight duration is approximately 2h 30m - 2h 59m.
What is the distance from Seattle (SEA) to Denver (DEN)?
The distance is 1028 miles (1654 km).
What aircraft does United Airlines use on this route?
United Airlines uses Airbus A320, Airbus A319, Boeing 737-900 Passenger on this route.
Which other airlines operate on this route?
4 other airlines operate on this route: Southwest Airlines, Delta Air Lines, Alaska Airlines and 1 more.
What are the earliest and latest United Airlines flight departure times?
The earliest United Airlines flight departs at 05:05 and the latest departs at 19:13.
View all United Airlines flights to Seattle (SEA) →
Popular United Airlines routes from Seattle include multiple destinations.
Route data verified regularly by Triposia Travel Research Team.