Direct (non-stop) flights from SeaTac (SEA) to Washington (IAD)
Find comprehensive flight information, schedules, and booking details for direct flights from SeaTac (SEA), US to Washington (IAD), US. This popular route is operated by 3 airlines, offering multiple daily departures.• 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 - 5h 7m
08:00
22:20
2313 miles (3722 km)
January
3 (Show)
30
Terminal 2 & Terminal 1 (SeaTac (SEA))
Main Terminal & Concourse A (Washington (IAD))
Flight Schedule
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Airlines Operating This Route
United Airlines (UA), Alaska Airlines (AS), Delta Air Lines (DL)
Click any airline to view their specific flight schedules, policies, and route details for this connection. You can also explore flights from SeaTac (SEA) and flights to Washington (IAD).
Route Insights
Route Demand
With 30 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 Seattle (SEA) and Washington (IAD). 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 Seattle (SEA) and Washington (IAD), requiring larger aircraft and extended flight times.
Flight Duration
Flight duration averages 4h 50m - 5h 17m, with actual times ranging from 4h 54m - 5h 7m depending on aircraft type, wind conditions, and routing.
Airline Comparison
Available Airlines
Travelers have 3 airline options on this route: United Airlines, Alaska Airlines, Delta Air Lines. 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 United Airlines and Delta Air Lines.
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Best Time to Visit & Travel Planning
Cheapest Day
Cheapest Month
Average Fare
$377
Travel Planning Tips for SeaTac (SEA) to Washington (IAD)
- Best Day to Book
Wednesday typically offers the lowest fares for flights from SeaTac (SEA) to Washington (IAD). Consider booking on this day for potential savings.
- Best Month to Travel
September is generally the cheapest month to fly from SeaTac (SEA) to Washington (IAD). Plan your trip during this month for the best deals.
- Average Flight Price
The average fare for flights from SeaTac (SEA) to Washington (IAD) is approximately $377. Prices may vary based on booking time, season, and airline.
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Related Pages
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Frequently Asked Questions
How many flights operate from Seattle (SEA) to Washington (IAD)?
There are 4 direct flights operating from Seattle (SEA) to Washington (IAD). Approximately 3-6 flights daily.
Which airlines operate flights from Seattle (SEA) to Washington (IAD)?
3 airlines operate on this route: United Airlines, Alaska Airlines, Delta Air Lines.
How long is the flight from Seattle (SEA) to Washington (IAD)?
The flight duration from Seattle (SEA) to Washington (IAD) is approximately 4h 50m - 5h 17m.
What is the distance from Seattle (SEA) to Washington (IAD)?
The distance from Seattle (SEA) to Washington (IAD) is 2313 miles (3722 km).
What is the flight time range for this route?
Flight times on this route range from 4h 54m - 5h 7m.
What are the earliest and latest flight departure times?
The earliest flight departs at 08:00 and the latest flight departs at 22:20.
What is the cheapest month to fly from Seattle (SEA) to Washington (IAD)?
January is typically the cheapest month to fly on this route.
How many flights operate per week on this route?
Approximately 30 flights operate per week from Seattle (SEA) to Washington (IAD).
What types of aircraft operate on this route?
This route is served by Boeing 737-800 Passenger, Boeing 737-900 (winglets) Passenger/BBJ3, Airbus A220-300, Boeing 737MAX 9 Passenger.
What is the average flight price from Seattle (SEA) to Washington (IAD)?
The average flight price for a round-trip ticket from Seattle (SEA) to Washington (IAD) is approximately $413 USD. Prices can vary based on booking time, season, and airline.
When is the best time to book flights from Seattle (SEA) to Washington (IAD) for the lowest prices?
January is typically the cheapest month to fly from Seattle (SEA) to Washington (IAD). Booking in advance and avoiding peak travel seasons can help you find better deals.
How many airlines offer flights from Seattle (SEA) to Washington (IAD)?
3 airlines offer direct flights from Seattle (SEA) to Washington (IAD), providing travelers with multiple options for scheduling and pricing.
How far is Washington (IAD) from Seattle (SEA)?
The distance from Seattle (SEA) to Washington (IAD) is 2313 miles (3722 km). This is a long-haul flight route.
How long does it take to fly from Seattle (SEA) to Washington (IAD)?
The flight time from Seattle (SEA) to Washington (IAD) is approximately 4h 50m - 5h 17m. Actual flight duration may vary based on weather conditions, aircraft type, and routing.
What city does Washington (IAD) serve?
Washington (IAD) serves Washington, US.