Washington (IAD) → Seattle (SEA)
About Washington to Seattle Flights
Discover the best flights from Washington to Seattle, covering 3,701 km in approximately 5h 8m. Washington (IAD) to Seattle (SEA) is one of the popular medium-haul routes within United States. With 3 major airlines operating this route including direct flights, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Washington to Seattle.
12-Month Price History
Flight prices from Washington to Seattle vary significantly throughout the year. February typically offers the best deals with average prices around $552, while July sees the highest prices, averaging $923. Savvy travelers can save up to 40% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
79 days
For best prices
Booking Tips
For the best prices on Washington to Seattle flights, we recommend booking 52 days in advance. Domestic flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
United Airlines UA | $920 | $3310 | $4070 |
Alaska Airlines AS | $930 | $2880 | $4530 |
Delta Air Lines DL | $980 | $3190 | $4860 |
United Airlines
UA
Economy
$920
Business
$3310
First
$4070
Alaska Airlines
AS
Economy
$930
Business
$2880
First
$4530
Delta Air Lines
DL
Economy
$980
Business
$3190
First
$4860
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
Washington → Seattle
Ronald Reagan Washington National (DCA) to Seattle-Tacoma International (SEA)
Distance: 3,738 km
Average price: $661
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Frequently Asked Questions
How long is the flight from Washington to Seattle?
The flight time from Washington (IAD) to Seattle (SEA) is approximately 5 hours and 8 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between Washington and Seattle?
The aerial distance between Washington and Seattle is 3,701 kilometers (2,300 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Washington to Seattle?
Several airlines operate flights between Washington and Seattle, including Delta Air Lines, United Airlines, Alaska Airlines. Direct flights are available on this route.
What is the cheapest month to fly from Washington to Seattle?
Based on historical data, February typically offers the lowest airfares for flights from Washington to Seattle. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to Seattle?
For the best prices on Washington to Seattle flights, we recommend booking 43 days in advance. Domestic flights can sometimes offer good last-minute deals, but advance booking is usually cheaper.
Do I need a visa to travel from Washington to Seattle?
Visa requirements depend on your nationality and the purpose of your visit. Since this is a domestic flight, no visa is required for citizens.
What is the time difference between Washington and Seattle?
Washington operates on America/New_York time zone, while Seattle is in the America/Los_Angeles time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.