Cheapest one-way
$ 223.00
Alaska Airlines · Nonstop · 3 hr 47 min
One-way tickets on SEA–DEN recently started around $ 223.00.
Flights from Seattle to Denver
BookingTrolley tracks the Seattle to Denver route (SEA–DEN), where tickets recently opened at $ 446.00. See how prices shift by airline, stops and season below.
Seattle to Denver flights overview
Covering around 1,645 km between SEA and DEN, the quickest nonstop flight takes about 3 hr 45 min. BookingTrolley found 4 airlines currently compete on the SEA–DEN corridor, with Alaska Airlines posting one of the lowest fares at $ 446.00. 3 of them offer nonstop options, which save layover time but can cost more than connecting itineraries.
The lowest fare BookingTrolley recently tracked from Seattle to Denver was $ 446.00. Based on this route's seasonal pattern, fares average roughly $ 460.00 over the year. Nov tends to be the cheapest month to fly (around $ 384.00), while Jun is usually the most expensive at about $ 571.00 — a swing of roughly 49%.
Frequently asked questions about flying from Seattle to Denver
Tuesday and Wednesday are typically the cheapest days to fly from Seattle to Denver. According to BookingTrolley fare data on the Seattle to Denver route (SEA–DEN), round-trip tickets started at $ 446.00. United States travellers often save by shifting 3–4 days around their preferred date on BookingTrolley.
The cheapest airlines on Seattle to Denver are Alaska Airlines (from $ 446.00), Delta Air Lines (from $ 500.00), United Airlines (from $ 549.00), according to BookingTrolley's multi-provider comparison priced for the United States market currency when available.
The cheapest flights from Seattle to Denver started at $ 446.00 round trip on a nonstop itinerary on Alaska Airlines, per BookingTrolley data relevant to United States shoppers. Fares fluctuate with demand.
A nonstop flight from Seattle to Denver takes about 3 hr 45 min in the air on the fastest outbound leg, based on BookingTrolley itinerary data from recent searches. Connecting flights add layover time and can extend total travel to a full day or more.
Shoulder season around peak holidays often pairs softer airfares with lighter crowds. According to BookingTrolley fare data on the Seattle to Denver route (SEA–DEN), round-trip tickets started at $ 446.00. BookingTrolley suggests booking 4–8 weeks ahead for routes like Seattle to Denver.
Use BookingTrolley's flexible-date comparison for Seattle (SEA) to Denver (DEN) to see which days cost least. Avoiding Friday–Sunday peaks is one of the fastest ways for United States travellers to cut the ticket price.
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