Seattle to Denver flights
Round trip · Economy · Prices per person in USD
Prices updated
Buy now or wait? We're still learning this route. We have 1 day of prices so far and need about a week to say whether to book or wait.
Not ready to book? Get an email when Seattle → Denver drops below your price.Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| September 2026 | No fares found yet |
| October 2026 | $145 (cheapest month) |
| November 2026 | No fares found yet |
| December 2026 | No fares found yet |
| January 2027 | No fares found yet |
| February 2027 | No fares found yet |
| March 2027 | No fares found yet |
| April 2027 | $338 |
Cheapest dates in the next 4 months
Round trip, per person-
Oct 28 – Nov 1 4 nights · leave Wed$145$145 Book
Frontier Airlines 1 stop · 4h 45m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Plan the rest of your trip
Denver · Oct 28 – Nov 1Travel insurance · EKTA Airport transfer · Kiwitaxi
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Flights to Denver from other cities
All flights to Denver Flying the other way? Denver to Seattle from $168
Seattle to Denver: questions
How much is a flight from Seattle to Denver?
The cheapest round trip we have found right now is $145, leaving October 28 and returning November 1. Prices are per person, economy, in USD.
About this route
We track round-trip economy fares from Seattle (United States) to Denver (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $145, departing October 28 and returning November 1. The cheapest month to fly in our data is October, from $145. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.