Denver (DEN) → Seattle (SEA)
About Denver to Seattle Flights
Discover the best flights from Denver to Seattle, covering 1,645 km in approximately 2h 33m. Denver (DEN) to Seattle (SEA) is one of the busy short-haul routes within United States. With 6 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 Denver to Seattle.
12-Month Price History
Flight prices from Denver to Seattle vary significantly throughout the year. February typically offers the best deals with average prices around $265, while July sees the highest prices, averaging $443. 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
47 days
For best prices
Booking Tips
For the best prices on Denver to Seattle flights, we recommend booking 78 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 |
|---|---|---|---|
Southwest Airlines WN | $390 | - | - |
Frontier Airlines F9 | $400 | - | - |
Alaska Airlines AS | $500 | $1940 | $2640 |
United Airlines UA | $620 | $2020 | $2700 |
SkyWest Airlines OO | $630 | $2250 | $3450 |
Delta Air Lines DL | $660 | $2030 | $3170 |
Southwest Airlines
WN
Economy
$390
Business
-
First
-
Frontier Airlines
F9
Economy
$400
Business
-
First
-
Alaska Airlines
AS
Economy
$500
Business
$1940
First
$2640
United Airlines
UA
Economy
$620
Business
$2020
First
$2700
SkyWest Airlines
OO
Economy
$630
Business
$2250
First
$3450
Delta Air Lines
DL
Economy
$660
Business
$2030
First
$3170
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
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Frequently Asked Questions
How long is the flight from Denver to Seattle?
The flight time from Denver (DEN) to Seattle (SEA) is approximately 2 hours and 33 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between Denver and Seattle?
The aerial distance between Denver and Seattle is 1,645 kilometers (1,022 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Denver to Seattle?
Several airlines operate flights between Denver and Seattle, including Delta Air Lines, United Airlines, Southwest Airlines and 3 more airlines. Direct flights are available on this route.
What is the cheapest month to fly from Denver to Seattle?
Based on historical data, February typically offers the lowest airfares for flights from Denver 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 Denver to Seattle flights, we recommend booking 35 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 Denver 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 Denver and Seattle?
Denver operates on America/Denver 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.