Seattle (SEA) → Denver (DEN)
About Seattle to Denver Flights
Discover the best flights from Seattle to Denver, covering 1,645 km in approximately 2h 33m. Seattle (SEA) to Denver (DEN) 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 Seattle to Denver.
12-Month Price History
Flight prices from Seattle to Denver vary significantly throughout the year. February typically offers the best deals with average prices around $264, while July sees the highest prices, averaging $444. Savvy travelers can save up to 41% 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
43 days
For best prices
Booking Tips
For the best prices on Seattle to Denver flights, we recommend booking 76 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 |
|---|---|---|---|
Frontier Airlines F9 | $310 | - | - |
Southwest Airlines WN | $310 | - | - |
SkyWest Airlines OO | $400 | $1590 | $2610 |
Delta Air Lines DL | $440 | $1680 | $2980 |
Alaska Airlines AS | $480 | $1820 | $2790 |
United Airlines UA | $500 | $1680 | $2210 |
Frontier Airlines
F9
Economy
$310
Business
-
First
-
Southwest Airlines
WN
Economy
$310
Business
-
First
-
SkyWest Airlines
OO
Economy
$400
Business
$1590
First
$2610
Delta Air Lines
DL
Economy
$440
Business
$1680
First
$2980
Alaska Airlines
AS
Economy
$480
Business
$1820
First
$2790
United Airlines
UA
Economy
$500
Business
$1680
First
$2210
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 Seattle to Denver?
The flight time from Seattle (SEA) to Denver (DEN) 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 Seattle and Denver?
The aerial distance between Seattle and Denver is 1,645 kilometers (1,022 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Seattle to Denver?
Several airlines operate flights between Seattle and Denver, 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 Seattle to Denver?
Based on historical data, February typically offers the lowest airfares for flights from Seattle to Denver. 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 Denver?
For the best prices on Seattle to Denver flights, we recommend booking 46 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 Seattle to Denver?
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 Seattle and Denver?
Seattle operates on America/Los_Angeles time zone, while Denver is in the America/Denver time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.