Cheapest one-way
C$ 305.51
Alaska Airlines · Nonstop · 3 hr 47 min
One-way tickets on SEA–DEN recently started around C$ 305.51.
Flights from Seattle to Denver
Recent BookingTrolley searches found Seattle to Denver fares from C$ 611.02 — compare live SEA–DEN prices, airlines and durations 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 C$ 611.02. 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 C$ 611.02. Based on this route's seasonal pattern, fares average roughly C$ 630.20 over the year. Nov tends to be the cheapest month to fly (around C$ 526.08), while Jun is usually the most expensive at about C$ 782.27 — a swing of roughly 49%.
Frequently asked questions about flying from Seattle to Denver
According to BookingTrolley fare data on the Seattle to Denver route (SEA–DEN), round-trip tickets started at C$ 611.02. Prices are shown in USD for comparison; Canada travellers should confirm the final checkout currency on BookingTrolley.
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.
Recent BookingTrolley comparisons list Alaska Airlines (from C$ 611.02), Delta Air Lines (from C$ 685.00), United Airlines (from C$ 752.13) among the lowest fares on Seattle to Denver. Carrier availability changes with season and sales.
Mid-week departures and shoulder seasons usually cost less. According to BookingTrolley fare data on the Seattle to Denver route (SEA–DEN), round-trip tickets started at C$ 611.02. BookingTrolley helps Canada travellers spot dips before peak travel.
Find cheap flights on popular routes
Explore fares from Seattle, into Denver, and on related corridors with BookingTrolley.
- Flights from Seattle to New York
- Flights from Seattle to New York
- Flights from Seattle to Los Angeles
- Flights from Seattle to San Francisco
- Flights from Seattle to Chicago
- Flights from Seattle to Miami
- Flights from Seattle to Dallas
- Flights from Seattle to Houston
- Flights from Seattle to Atlanta
- Flights from Seattle to Boston
- Flights from Seattle to Las Vegas