Flights Denver → Seattle
DEN → SEA
Route overview
The flight route from Denver to Seattle operates with an average on-time performance of 80%, with flights typically experiencing a mean delay of 9.5 minutes. Over the course of a year, this route sees around 1325 flights using various aircraft models including Boeing 737 series and Airbus A319/A320 variants.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The Denver (DEN) → Seattle (SEA) route is operated by American Airlines, Alaska Airlines, Frontier Airlines, United Airlines, Southwest Airlines. Across 1808 flights monitored in recent months, 78% arrived on time (within 15 min of schedule), with an average delay of 11 minutes. The cancellation rate is 1.71%. FlightGuard's average computed risk is 20.9/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Seattle the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from Denver the average ATFM delay is 2.0 minutes.
Heading to Seattle: what to expect in this direction
Flying from Denver (DEN) to Seattle (SEA) heads north-west for about 1,645 km, a flight time of roughly 2h 29m.
Departures from Denver on this leg cluster in the overnight window: about 42% of DEN-SEA flights take off then.
Air-traffic congestion: departing Denver the average ATFM delay is 2.0 min (atfm); arriving into Seattle it is 2.0 min (atfm).
Across 1,808 tracked DEN-SEA flights, 78% left on time with an average delay of 11 min and a 1.7% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| United Airlines (UA) | 74% | 10 min | 6.9% |
| American Airlines (AA) | 74% | 16 min | 3.0% |
| Frontier Airlines (F9) | 74% | 15 min | 2.2% |
| Southwest Airlines (WN) | 73% | 6 min | 3.1% |
| Alaska Airlines (AS) | 67% | 10 min | 11.9% |
Airlines operating DEN-SEA
Airports
Frequently asked questions about DEN-SEA
On the Denver (DEN) -> Seattle (SEA) route, on-time performance is 78% with an average delay of 11 minutes, based on 1808 tracked flights.
The cancellation rate on Denver-Seattle is 1.71% across 1808 monitored flights.
The route is operated by 5 airlines: American Airlines, Alaska Airlines, Frontier Airlines, United Airlines, Southwest Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Seattle, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
