Southwest Airlines
Every day
starting at $124
Flaut.Travel was designed and developed by a team dedicated to making the process of searching, comparing and booking airline tickets as easy and convenient as possible. Our service helps travelers to find and buy the cheapest flights from Seattle to Denver. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.
The minimum one-way ticket price from Seattle to Denver is $109 (November 2026), while the maximum is $160 (December 2026). On average, a ticket costs $128–$275.
A non-stop flight is the most convenient and comfortable way to fly from Seattle to Denver, despite the fact that sometimes flights with transfers can cost significantly less.
The only airline operating direct flights from Seattle to Denver is Southwest Airlines. Flights operate every day.
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Answers to questions about the route that travelers are most interested in.
We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.
Ticket prices for Seattle — Denver follow a predictable curve: rise, peak, and decline. This typical seasonal pattern lets you plan your purchase to avoid overpaying.
Prices rise from November 2026 to December 2026 (+47%), then decline from October 2026 to November 2026 (5%). The cheapest tickets are in October 2026–November 2026 (averaging $112), while the priciest are in November 2026–December 2026 ($135).
For savings, plan your flight for October 2026–November 2026 — you could save up to 17%. Try to avoid November 2026–December 2026 when possible: prices are at their highest then.
Price spread on this route is 18%. Costs depend heavily on the season, so flexibility in choosing your departure month is especially valuable here.
Southwest Airlines
Every day
starting at $124
All airports
Seattle — Denver
11/10/2026
Departure
Direct flight
F93406
starting at $101
Seattle — Denver
11/15/2026
Departure
Direct flight
F93406
starting at $164
starting at $101
The route Seattle — Denver is served by a single airline — Frontier Airlines. This means that when planning your trip, you won’t need to spend time choosing between dozens of carriers: all flights are operated by one provider, which simplifies the booking process. Despite the limited choice, passengers can still plan ahead, select optimal departure dates, and buy tickets at the lowest price — from $101. Using our service, you can quickly compare available Frontier Airlines flights and book a seat in advance at a favorable rate.
The cheapest flight ticket from Seattle to Denver according to data for the last 48 hours costs $101
Often the best time to buy tickets from Seattle to Denver is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Seattle to Denver can be found flying in these months: November, October, December.
The fastest flights from Seattle to Denver start from 2 hours 48 minutes in the air.
The following airlines operate direct flights on the route Seattle — Denver: Frontier Airlines
We couldn't find any special offers for flights from Seattle to Denver
The cheapest one-way flight from Seattle to Denver departs on 11/10/2026, is operated by Frontier Airlines and costs $101
The cheapest roundtrip flight from Seattle to Denver departs on 12/23/2026, is operated by Frontier Airlines and costs $202
Fastest flight from Seattle to Denver takes 2h 48m
There are direct flights on this route 2 days a week: Su and Tu
The distance between Seattle and Denver is 1641km (1017 miles). The average flight duration is 2h 35m. There are 132 direct flights from Seattle to Denver. The time difference between Seattle and Denver is 1h. Flights from Seattle begin at 5:00 AM. The latest flight from Seattle departs at 9:15 PM