Flights operate between Seattle (SEA) and Washington (IAD).
1 airline operates this route with 3-6 flights daily flights.
Average flight time is 4h 50m - 5h 17m.
Route distance is 2313 miles (3722 km).
Route Distance
2313 miles (3722 km)
Average Duration
4h 50m - 5h 17m
Airlines Operating This Route
Alaska Airlines
Flight Frequency
Daily Flights
3-6 flights
Weekly Flights
30
Typical Departure Time Ranges
Earliest Departure
09:35
Latest Departure
22:20
Route Intelligence Dashboard
Overall Connectivity Score
60
GoodRoute Diversity
1
Direct Routes
Alaska Airlines serves 1 destination from SEA
Weekly Frequency
14
Weekly Flights
Trend: Stable
Top 1 Most Frequent Routes - Details
| Route | Weekly Flights | Duration | Distance | Reliability |
|---|---|---|---|---|
| SEA → Washington (IAD) (IAD) | 14/week | 4h 50m - 5h 17m | 2,313 km | Moderate |
Flight Schedule & Filters
Alaska Airlines flights from SeaTac (SEA) to Washington (IAD)
Alaska Airlines operates scheduled nonstop flights between SeaTac (SEA) and Washington (IAD). Alaska Airlines operates 3-6 flights daily flights on this route.• Flight Duration: 4h 50m - 5h 17m (average flight time)• Distance: 2313 miles (3722 km) (air miles between airports)• Daily Flights: 3-6 flights (scheduled departures per day)
SeaTac (SEA)
US
Washington (IAD)
US
FLIGHT TIME
4h 50m - 5h 17m
FLIGHT DISTANCE
2313 miles (3722 km)
4h 54m - 4h 59m
09:35
22:20
2313 miles (3722 km)
January
1 (Show)
30
Alaska Airlines Terminal Information & Contact
Departure Terminal - SeaTac (SEA)
Terminal: 1
Phone: 1-800-252-7522
Location: 1, Seattle, US
Arrival Terminal - Washington (IAD)
Terminal: 1
Phone: 000 800 100 1051
Location: 1, Washington, US
Alaska Airlines Flight Schedule from SeaTac (SEA) to Washington (IAD)
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
AS406 |  Alaska Airlines | 09:35 | 17:34:00 | Boeing 737-900 (winglets) Passenger/BBJ3 |
AS367 | Alaska Airlines | 22:20 | 06:14:00 | Boeing 737MAX 9 Passenger |
Alaska Airlines Monthly Flight Calendar
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Alaska Airlines Terminal Information
Departure Terminal at SeaTac (SEA):
• Terminal : Alaska Airlines operates from this terminal
Terminal 1:
• Alaska Airlines Terminal Phone: 1-800-252-7522
Arrival Terminal at Washington (IAD):
• Terminal : Alaska Airlines operates from this terminal
Terminal 1:
• Alaska Airlines Terminal Phone: 000 800 100 1051
Weather & Climate at Washington (IAD)
14.4°C
Avg Temperature88mm
Avg Rainfall10.3km/h
Avg Wind Speed66%
Avg HumidityBest Months to Visit
Challenging Months
12-Month Weather Overview
Wind Speed by Month
Humidity by Month
Best Time to Book Flights to Washington (IAD)
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 Washington (IAD)
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 Alaska Airlines to Washington (IAD)
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: 2025-08
Seasonal Travel Calendar
Alaska Airlines Contact Information and Customer Services
Alaska Airlines Address
P.O. Box 68900
Seattle, WA 98168, USA
Customer Service Phone
+1 800 654 5669Official Website
alaskaair.com/Frequently Asked Questions
How many Alaska Airlines flights operate from Seattle (SEA) to Washington (IAD)?
Alaska Airlines operates 2 flights from Seattle (SEA) to Washington (IAD).
What city does Washington (IAD) airport serve?
Washington (IAD) airport serves Washington, US.
How long is the Alaska Airlines flight from Seattle (SEA) to Washington (IAD)?
The flight duration is approximately 4h 50m - 5h 17m.
What is the distance from Seattle (SEA) to Washington (IAD)?
The distance is 2313 miles (3722 km).
What aircraft does Alaska Airlines use on this route?
Alaska Airlines uses Boeing 737-900 (winglets) Passenger/BBJ3, Boeing 737MAX 9 Passenger on this route.
Which other airlines operate on this route?
2 other airlines operate on this route: United Airlines, Delta Air Lines.
What are the earliest and latest Alaska Airlines flight departure times?
The earliest Alaska Airlines flight departs at 09:35 and the latest departs at 22:20.
View all Alaska Airlines flights to Seattle (SEA) →
Popular Alaska Airlines routes from Seattle include multiple destinations.
Route data verified regularly by Triposia Travel Research Team.