Direct (non-stop) flights from Washington (IAD) to SeaTac (SEA)
Find comprehensive flight information, schedules, and booking details for direct flights from Washington (IAD), US to SeaTac (SEA), US. This popular route is operated by 3 airlines, offering multiple daily departures.• Flight Duration: 5h 35m - 6h 04m (average flight time)• Distance: 2313 miles (3722 km) (air miles between airports)• Daily Flights: 3-4 flights (scheduled departures per day)
Washington (IAD)
US
SeaTac (SEA)
US
FLIGHT TIME
5h 35m - 6h 04m
FLIGHT DISTANCE
2313 miles (3722 km)
5h 54m - 6h 4m
07:15
18:34
2313 miles (3722 km)
January
3 (Show)
35
Main Terminal & Concourse A (Washington (IAD))
Terminal 1 & Terminal 2 (SeaTac (SEA))
Flight Schedule
Loading calendar...
Airlines Operating This Route
Delta Air Lines (DL), Alaska Airlines (AS), United Airlines (UA)
Click any airline to view their specific flight schedules, policies, and route details for this connection. You can also explore flights from Washington (IAD) and flights to SeaTac (SEA).
Route Insights
Route Demand
With 35 weekly flights, this route maintains steady demand throughout the week, providing travelers with frequent scheduling options.
Route Importance
Multiple airlines compete on this route (3 carriers), indicating its significance in connecting Washington (IAD) and Seattle (SEA). This competition often leads to competitive pricing and multiple daily departure options.
Best Time to Fly
Best Value Period
January typically offers the best value for travelers, with lower average fares compared to peak travel periods.
Price Trends
Price variation throughout the year is significant, with Jan being the most affordable month and prices increasing during peak travel seasons.
Distance & Duration Explained
Route Distance
At 2313 miles (3722 km), this is an ultra-long-haul route between Washington (IAD) and Seattle (SEA), requiring larger aircraft and extended flight times.
Flight Duration
Flight duration averages 5h 35m - 6h 04m, with actual times ranging from 5h 54m - 6h 4m depending on aircraft type, wind conditions, and routing.
Airline Comparison
Available Airlines
Travelers have 3 airline options on this route: Delta Air Lines, Alaska Airlines, United Airlines. Each airline offers different schedules, pricing, and service levels to meet various travel needs.
Flight Frequency
Alaska Airlines operates the most flights on this route with 2 daily departures, followed by Delta Air Lines and United Airlines.
Loading weather charts...
Best Time to Visit & Travel Planning
Cheapest Day
Cheapest Month
Average Fare
$383
Travel Planning Tips for Washington (IAD) to SeaTac (SEA)
- Best Day to Book
Tuesday typically offers the lowest fares for flights from Washington (IAD) to SeaTac (SEA). Consider booking on this day for potential savings.
- Best Month to Travel
September is generally the cheapest month to fly from Washington (IAD) to SeaTac (SEA). Plan your trip during this month for the best deals.
- Average Flight Price
The average fare for flights from Washington (IAD) to SeaTac (SEA) is approximately $383. Prices may vary based on booking time, season, and airline.
Loading price statistics...
Related Pages
Related Airports
Related Airlines
Frequently Asked Questions
How many flights operate from Washington (IAD) to Seattle (SEA)?
There are 4 direct flights operating from Washington (IAD) to Seattle (SEA). Approximately 3-4 flights daily.
Which airlines operate flights from Washington (IAD) to Seattle (SEA)?
3 airlines operate on this route: Delta Air Lines, Alaska Airlines, United Airlines.
How long is the flight from Washington (IAD) to Seattle (SEA)?
The flight duration from Washington (IAD) to Seattle (SEA) is approximately 5h 35m - 6h 04m.
What is the distance from Washington (IAD) to Seattle (SEA)?
The distance from Washington (IAD) to Seattle (SEA) is 2313 miles (3722 km).
What is the flight time range for this route?
Flight times on this route range from 5h 54m - 6h 4m.
What are the earliest and latest flight departure times?
The earliest flight departs at 07:15 and the latest flight departs at 18:34.
What is the cheapest month to fly from Washington (IAD) to Seattle (SEA)?
January is typically the cheapest month to fly on this route.
How many flights operate per week on this route?
Approximately 35 flights operate per week from Washington (IAD) to Seattle (SEA).
What types of aircraft operate on this route?
This route is served by Airbus A220-300, Boeing 737-900 (winglets) Passenger/BBJ3, Boeing 737-800 Passenger.
What is the average flight price from Washington (IAD) to Seattle (SEA)?
The average flight price for a round-trip ticket from Washington (IAD) to Seattle (SEA) is approximately $419 USD. Prices can vary based on booking time, season, and airline.
When is the best time to book flights from Washington (IAD) to Seattle (SEA) for the lowest prices?
January is typically the cheapest month to fly from Washington (IAD) to Seattle (SEA). Booking in advance and avoiding peak travel seasons can help you find better deals.
How many airlines offer flights from Washington (IAD) to Seattle (SEA)?
3 airlines offer direct flights from Washington (IAD) to Seattle (SEA), providing travelers with multiple options for scheduling and pricing.
How far is Seattle (SEA) from Washington (IAD)?
The distance from Washington (IAD) to Seattle (SEA) is 2313 miles (3722 km). This is a long-haul flight route.
How long does it take to fly from Washington (IAD) to Seattle (SEA)?
The flight time from Washington (IAD) to Seattle (SEA) is approximately 5h 35m - 6h 04m. Actual flight duration may vary based on weather conditions, aircraft type, and routing.
What city does Seattle (SEA) serve?
Seattle (SEA) serves Seattle, US.