Southwest AirlinesWN
Flights WN3409 09:05 Su
live
Direct flights from Seattle (SEA) to Colorado Springs (COS): 1 nonstop departure observed each week across 1 airline. The nonstop covers 1,716 km, an estimated 2 hours 42 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Colorado Springs. Updated 16 August 2026 at 10:25 UTC.
SEA
Seattle
heavy · +36
COS
Colorado Springs
tracking
1,716 km · ~2h 42m est.
Under pressure · 1 airline · 1x weekly · nonstop
52 / 100
route health from live SEA and COS delay boards
Search live fares for this route →Flight time~2h 42mestimated from route distance
Weekly departures1x1 direct airline on the leg
Current nonstop fares
SEA → COS · one way · economy · 1 adult
TodayChecking…Direct airline fares
TomorrowChecking…Direct airline fares
In one weekChecking…Direct airline fares
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Southwest Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysAirports right now
live boardsnext sweep in 120s
How the Seattle to Colorado Springs route actually runs
Pro Flight Search tracks every published board update for nonstop SEA to COS flights: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises. Fares link straight to the operating airline with no markups.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Seattle (SEA) to Colorado Springs (COS) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SEA-COS
SEA to COS questions
Is SEA–COS running on time right now?
Some delays possible. The departure side at SEA is the weaker end, route health score 52/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from SEA to COS?
Great-circle distance is 1,716 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 151–177 min gate-to-gate on this route.
How often does SEA–COS fly?
Southwest Airlines runs the route with about 1 flight a week (sun). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at SEA and arrival-side delay at COS, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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