Flights Seattle → Denver

One way · Economy · 1 adult · price per person · next 14 days from September 10, 2026

Last observed price on Aviasales for 5 of 15 dates; the lowest is $125. Prices are not guaranteed and are confirmed at booking time.

Last observed price by date

Date	Last observed price	Flight	Departure	Arrival	Stops
Thu, Sep 10	$189	Frontier Airlines F94204 (1st of 2 flights)	9:45 PM Sea-Tac (SEA)	10:07 AM (+1) Denver (DEN)	1 stop · Las Vegas Harry Reid
Fri, Sep 11	—	—	—	—	—
Sat, Sep 12	—	—	—	—	—
Sun, Sep 13	$152	Frontier Airlines F94204 (1st of 2 flights)	9:45 PM Sea-Tac (SEA)	10:07 AM (+1) Denver (DEN)	1 stop · Las Vegas Harry Reid
Mon, Sep 14	—	—	—	—	—
Tue, Sep 15	—	—	—	—	—
Wed, Sep 16	—	—	—	—	—
Thu, Sep 17	$125lowest	Frontier Airlines F93406	4:27 PM Sea-Tac (SEA)	8:21 PM Denver (DEN)	Direct
Fri, Sep 18	—	—	—	—	—
Sat, Sep 19	—	—	—	—	—
Sun, Sep 20	$151	Frontier Airlines F92276 (1st of 2 flights)	10:53 AM Sea-Tac (SEA)	9:35 AM (+1) Denver (DEN)	1 stop · Ontario
Mon, Sep 21	—	—	—	—	—
Tue, Sep 22	$138	Frontier Airlines F94668 (1st of 2 flights)	10:57 AM Sea-Tac (SEA)	6:33 PM Denver (DEN)	1 stop · Las Vegas Harry Reid
Wed, Sep 23	—	—	—	—	—
Thu, Sep 24	—	—	—	—	—

Price not guaranteed: it is confirmed on Aviasales at booking time. How it works

Seattle, United States (SEA, city code)

Seattle-Tacoma (SEA).

Denver, United States (DEN, city code)

Denver International (DEN).

FromToDeparture date