Search & Compare - Denver to Seattle Flights & Tickets

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Cheap flights from Denver to Seattle (DEN to SEA)

Looking for a cheap last-minute deal or the best round-trip flight from Denver to Seattle? Find the biggest savings on one-way and round-trip tickets right here.

Recent airfare deals on Denver to Seattle

Southwest Airlines  WN
Southwest Airlines
Denver
2025-07-25
Seattle
2025-07-30
USD 135

One-way WN Nonstop fare found on 2025-06-03
Hawaiian Airlines  HA
Hawaiian Airlines
Denver
2025-07-25
Seattle
2025-07-30
USD 167

One-way HA Nonstop fare found on 2025-06-03
Hawaiian Airlines  HA
Hawaiian Airlines
Denver
2025-07-25
Seattle
2025-07-30
USD 178

One-way HA Nonstop fare found on 2025-06-03
Delta Airlines  DL
Delta Airlines
Denver
2025-07-25
Seattle
2025-07-30
USD 203

One-way DL Nonstop fare found on 2025-06-03
Frontier Airlines  F9
Frontier Airlines
Denver
2025-07-25
Seattle
2025-07-30
USD 257

One-way F9 Nonstop fare found on 2025-06-03
Southwest Airlines  WN
Southwest Airlines
Denver
2025-07-25
Seattle
2025-07-30
USD 261

One-way WN Nonstop fare found on 2025-06-03
Alaska Airlines  AS
Alaska Airlines
Denver
2025-07-25
Seattle
2025-07-30
USD 297

One-way AS Nonstop fare found on 2025-06-03
Sun Country Airlines  SY
Sun Country Airlines
Denver
2025-07-25
Seattle
2025-07-30
USD 300

One-way SY Nonstop fare found on 2025-06-03
United Airlines  UA
United Airlines
Denver
2025-07-25
Seattle
2025-07-30
USD 369

One-way UA Nonstop fare found on 2025-06-03
Southwest Airlines  WN
Southwest Airlines
Denver
2025-07-25
Seattle
2025-07-30
USD 393

One-way WN Nonstop fare found on 2025-06-03


*Prices are per person and are for e-tickets and include all taxes & fees in USD.
*Fareleaders always attempts to get accurate pricing, however, prices are not guaranteed.
*Fareleaders is not seller, we aggregate tones of data for you from other online travel agencies and external sources.

Facts to know while booking flights from Denver to Seattle

What are the airports in Denver?
DEN
What’s the most popular airline flying from DEN to SEA?
The most popular airline flying from Denver to Seattle are American Airlines, Hawaiian Airlines, JetBlue Airways, Sun Country Airlines, Southwest Airlines, Frontier Airlines, United Airlines, Alaska Airlines, Delta Airlines
Can I fly from DEN to SEA non-stop?
Yes, you can fly DEN to SEA non-stop on Hawaiian Airlines, Sun Country Airlines, Southwest Airlines, Frontier Airlines, United Airlines, Alaska Airlines, Delta Airlines
Which airlines fly nonstop between Denver and Seattle?
The non-stop flights between Denver and Seattle are Hawaiian Airlines, Sun Country Airlines, Southwest Airlines, Frontier Airlines, United Airlines, Alaska Airlines, Delta Airlines.
What’s the earliest departure time from DEN to SEA Airport?
The earliest flight leaves DEN at 5:00 am and lands in SEA - Seattle Tacoma International
What are the airports in Seattle?
SEA
Can I make changes to my Denver to Seattle flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from DEN to SEA?
Read the fare rules of the Denver to Seattle air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Denver and Seattle?
Oneworld, NULL, NULL, NULL, NULL, NULL, Star Alliance, Oneworld, SkyTeam operate flights between Denver and Seattle
How long does a flight from Denver to Seattle take?
It takes approximately 3 hour to fly non-stop from DEN to SEA, which is 1024.03 miles by air.
Which airlines provide the cheapest flights from Denver (DEN) to Seattle (SEA) ?
In the past couple of days, the cheapest tickets to SEA from DEN were found on Southwest Airlines : USD 261
Do I need a passport to fly between DEN and SEA?
No
What’s the latest departure time from DEN to SEA ?
The last flight leaves DEN at 10:3900 pm

Flights from Denver to Seattle

Origin AirportDenver International , Denver, US
Destination AirportSeattle Tacoma International , Seattle, US
Served by AirlinesAmerican Airlines, Hawaiian Airlines, JetBlue Airways, Sun Country Airlines, Southwest Airlines, Frontier Airlines, United Airlines, Alaska Airlines, Delta Airlines
Lowest PriceSouthwest Airlines : USD 261
Distance1024 miles

Airlines Flying from Denver International

Popular Routes

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