Cheap Flights from Seattle, WA to Denver, CO from $48

Return flight: Denver – Seattle
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On Cheapflightsplus.com you will find 37 direct and 233 connecting flights from Seattle to Denver. You can compare airfare deals from 7 airlines and multiple travel sites from $48, book and save on cheap plane tickets and last minute offers. Also check out SEA-DEN flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Seattle to Denver Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $48 (one-way), $82 (round-trip).
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Best Flights from Seattle to Denver Today

Take a look at the list of non stop flights and flights with layovers from Seattle to Denver with the lowest price of $48. The fastest direct flight takes 2h 40m and the fastest connecting – 4h 11m.
Price Departure Arrival Flight Duration Airline Flight
from $48
Find flight
12:30
Seattle
Seattle-Tacoma Intl
 16:15
Denver
Denver International
 2h 45m Sun Country Airlines
SY1698
from $49
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06:25
Seattle
Seattle-Tacoma Intl
 10:12
Denver
Denver International
 2h 47m Frontier Airlines
F93406
from $77
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20:17
Seattle
Seattle-Tacoma Intl
 23:59
Denver
Denver International
 2h 42m Hawaiian Airlines
HA6652
from $68
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13:50
Seattle
Seattle-Tacoma Intl
 20:42
Denver
Denver International
 5h 52m
layover
0h 51m - Ontario
 Frontier Airlines
F93163
F92908
from $96
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15:11
Seattle
Seattle-Tacoma Intl
 23:08
Denver
Denver International
 6h 57m
layover
2h 10m - Las Vegas
 Frontier Airlines
F94830
F94612
Show all tickets
*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on September 18, 2025
Full flight schedule will help you in detecting at what time planes fly from Seattle to Denver. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
Departure Arrival Flight Details Flight Duration Price
05:07 — 08:48
05:07 — 08:48 UA2269 United Airlines
Seattle — Denver
2h 41m
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from$105
06:25 — 10:12
06:25 — 10:12 F93406 Frontier Airlines
Seattle — Denver
2h 47m
Find flight
from$49
08:06 — 11:53
08:06 — 11:53 AS682 Alaska Airlines
Seattle — Denver
2h 47m
Find flight
from$122
08:45 — 12:28
08:45 — 12:28 UA1505 United Airlines
Seattle — Denver
2h 43m
Find flight
from$105
10:50 — 14:36
10:50 — 14:36 UA1061 United Airlines
Seattle — Denver
2h 46m
Find flight
from$147
11:04 — 14:51
11:04 — 14:51 UA1049 United Airlines
Seattle — Denver
2h 47m
Find flight
from$126
12:30 — 16:15
12:30 — 16:15 SY1698 Sun Country Airlines
Seattle — Denver
2h 45m
Find flight
from$48
13:09 — 16:49
13:09 — 16:49 HA6651 Hawaiian Airlines
Seattle — Denver
2h 40m
Find flight
from$118
14:24 — 18:15
14:24 — 18:15 UA2859 United Airlines
Seattle — Denver
2h 51m
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from$136
15:00 — 18:54
15:00 — 18:54 F94546 Frontier Airlines
Seattle — Denver
2h 54m
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from$97
15:49 — 19:32
15:49 — 19:32 HA6650 Hawaiian Airlines
Seattle — Denver
2h 43m
Find flight
from$118
16:59 — 20:47
16:59 — 20:47 F91176 Frontier Airlines
Seattle — Denver
2h 48m
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from$51
17:59 — 21:46
17:59 — 21:46 HA6654 Hawaiian Airlines
Seattle — Denver
2h 47m
Find flight
from$77
17:59 — 21:46
17:59 — 21:46 AS1163 Alaska Airlines
Seattle — Denver
2h 47m
Find flight
from$80
19:00 — 22:40
19:00 — 22:40 UA1218 United Airlines
Seattle — Denver
2h 40m
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from$105
20:17 — 23:59
20:17 — 23:59 HA6652 Hawaiian Airlines
Seattle — Denver
2h 42m
Find flight
from$77
20:17 — 23:59
20:17 — 23:59 AS642 Alaska Airlines
Seattle — Denver
2h 42m
Find flight
from$81
20:23 — 00:05
+1 day
20:23 — 00:05 HA6455 Hawaiian Airlines
Seattle — Denver
2h 42m
Find flight
from$118
*Departure and arrival times - local. Updated on September 18, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from Seattle to Denver depends on and how to choose the most interesting flight option for you.

Distance between Seattle and Denver is 1644 miles. Time difference between the cities is 1h. Airplanes depart 00:20 to 23:59 from 3 Seattle airports and arrive 00:20 to 23:59 to 2 Denver airports. Average flight time is 2h 45m.

  • The fastest flight 2h 40m
  • Average flight time 2h 45m
  • The earliest flight 00:20
  • The latest flight 23:59
  • Distance 1022 ml

The cheapest months to travel to Denver are may (from 48 $), june (from 49 $), december (from 68 $).

The most expensive months are november (from 217 $), february (from 101 $), october (from 80 $).

What is the lowest airfare Seattle to Denver?

The cheapest plane ticket found by our users is $48. This airfare is for economy class on one-way SY1698 flight by Sun Country Airlines for May 30, 2025 which leaves Seattle-Tacoma Intl in Seattle at 12:30 am and arrives at Denver Denver International at 16:15.

Economy class
$48
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Business class
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First class
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Popular Airlines on the Route

The flight Seattle — Denver is served by 7 regular airlines and 3 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 54 departures per week at the price of from $ 80 . And the most expensive tickets are offered by Turkish Airlines airline - from $ 1563.

Direct flights

There are 37 nonstop flights on the route. The fastest direct flight is UA1218 by United Airlines takes 2h 40m and the cheapest is SY1698 by Sun Country Airlines for $48.

  • AS - Alaska Airlines
    from $80
    Find
  • F9 - Frontier Airlines
    from $49
    Find
  • SY - Sun Country Airlines
    from $48
    Find
  • HA - Hawaiian Airlines
    from $77
    Find
  • UA - United Airlines
    from $105
    Find
See more direct flights

Connecting Flights

There are 233 flights with layovers on the route. The fastest connecting flight is HA6826 by Hawaiian Airlines takes 4h 11m and the cheapest is SY1698 by Sun Country Airlines for $68.

  • AS - Alaska Airlines
    from $111
    Find
  • F9 - Frontier Airlines
    from $68
    Find
  • SY - Sun Country Airlines
    from $132
    Find
  • TK - Turkish Airlines
    from $1563
    Find
  • HA - Hawaiian Airlines
    from $102
    Find
  • UA - United Airlines
    from $139
    Find
  • NK - Spirit Airlines
    from $135
    Find
See more connecting flights

Airports

You can fly from Seattle to Denver from 3 airports (Boeing Field International Airport, Seattle-Tacoma Intl, Kenmore Air Harbor SPB).

Seattle airports

  • Boeing Field International Airport-BFI
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  • Seattle-Tacoma Intl-SEA
    from $48
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  • Kenmore Air Harbor SPB-LKE
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Denver airports

  • Denver International-DEN
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  • Arapahoe Co-APA
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Airplanes

There are flights to Denver from Seattle by 7 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.

Top Domestic Destinations from Seattle

You may also consider searching for discounted plane tickets to some other popular places from Seattle within United States.

Top International Destinations from Seattle

Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.

How to book a plane ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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