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Cheap flights from Denver to Seattle

One-way from $107, found by travellers in the last 7 days. Aviasales checks the live price.

Departure
Return
Prices for nearby dates
Wed, Dec 16Any priceThu, Dec 17Any priceFri, Dec 18Any priceSat, Dec 19$107Sun, Dec 20Any priceMon, Dec 21Any priceTue, Dec 22Any priceWed, Dec 23Any price

Cheapest one-way tickets

Recent finds on different dates, for 1 adult. Baggage and fare rules are shown on Aviasales, where the price is checked live.

Cheapest
$107
Frontier Airlines, flight F9 4545Found 7 days ago, 1 adult
Check price on Aviasales
1:55pmDenverSat, Dec 19
Travel time 3h 11m, nonstopDENSEA
4:06pmSeattleSat, Dec 19
$125
Frontier Airlines, flight F9 4545Found 4 days ago, 1 adult
Check price on Aviasales
1:14pmDenverTue, Nov 24
Travel time 3h 8m, nonstopDENSEA
3:22pmSeattleTue, Nov 24
$125
Frontier Airlines, flight F9 4545Found 3 days ago, 1 adult
Check price on Aviasales
1:14pmDenverWed, Nov 25
Travel time 3h 8m, nonstopDENSEA
3:22pmSeattleWed, Nov 25
$145
Frontier Airlines, flight F9 2015Found 4 days ago, 1 adult
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6:42amDenverMon, Nov 23
Travel time 5h 10m, 1 stopDENSEA
10:52amSeattleMon, Nov 23
$155
Alaska Airlines, flight AS 309Found 6 days ago, 1 adult
Check price on Aviasales
9:42pmDenverTue, Dec 29
Travel time 3h 7m, nonstopDENSEA
11:49pmSeattleTue, Dec 29

Round trips

The cheapest return tickets found recently, price for the whole trip.

Plan the rest of the trip

  • Mobile data in United StatesTravel eSIM from $4, installed before you fly.
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  • Getting from the airportTransfers and car hire in Seattle, booked ahead at a fixed price.
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  • Things to do in SeattlePopular tours from $32 per person.
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  • Flight delayed?Delayed or cancelled? See which passenger rights cover this route.
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Price calendar

The lowest one-way fare found for each day over the next 60 days. A dash means no recent fare; you can still pick that day.

October 2026

MoTuWeThFrSaSu1234–5–6–7–8–9–10–11$18412$17213–14$16815–16–17–18–19–20–21–22–23–24–25–26–27–28–29–30–31–

November 2026

MoTuWeThFrSaSu1–2–3–4–5–6–7–8–9–10–11–12–13–14–15–16–17–18–19–20–21–22–23$14524$12525$12526–27–28–29–30–

December 2026

MoTuWeThFrSaSu1–2–345678910111213141516171819202122232425262728293031
$125 or lessGreen: the cheapest fifth of fares on this route. Lowest in these 60 days: Nov 24, $125.

Lowest fares by month

In the fares found this week, December has the lowest: from $107 one-way, against $168 in October. Pick a month to see its cheapest date.

$0$100$200OctNov$107DecJanFebMarAprMayJunJulAugSep
Show as a table
MonthCheapest one-wayDateStops
October$168Wed, Oct 14Nonstop
November$125Tue, Nov 24Nonstop
December$107Sat, Dec 19Nonstop
January 2027—
February 2027—
March 2027—
April 2027—
May 2027—
June 2027—
July 2027—
August 2027—
September 2027—

Questions travellers ask

What is the cheapest month to fly from Denver to Seattle?

In the fares found this week, December has the lowest: from $107 one-way, against $168 in October.

Are there direct flights from Denver to Seattle?

Yes. Recent fares include nonstop flights with Frontier Airlines and Alaska Airlines.

How long is the flight from Denver to Seattle?

A nonstop flight takes about 3h 5m. The distance is 1,022 mi.

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