Denver (DEN) to Seattle (SEA) flights
There are direct flights from Denver International Airport to Seattle Tacoma International Airport, sold by 5 airlines (including codeshares): American Airlines, Alaska Airlines, Frontier Airlines, United Airlines and Southwest Airlines. The distance is 1,645 km, about 2h 30m in the air. There are also 16 one-stop options, via airports such as Vancouver, Portland and Salt Lake City.
Live fares for DEN → SEASee all routes on the mapDirect flights from Denver to Seattle
| Route | Airlines (incl. codeshares) | Distance | Time (est.) |
|---|---|---|---|
| DEN → SEA | American Airlines, Alaska Airlines, Frontier Airlines, United Airlines, Southwest Airlines | 1,645 km | ~2h 30m |
Best one-stop connections
Through the biggest hubs first. Times include about 100 minutes to change planes.
| Via | Airlines | Distance | Time (est.) |
|---|---|---|---|
| YVR Vancouver | Air Canada and United Airlines then American Airlines and Air Canada | 1,994 km | ~5h 5m |
| PDX Portland | Frontier Airlines and United Airlines then Alaska Airlines and United Airlines | 1,800 km | ~4h 50m |
| SLC Salt Lake City | Frontier Airlines and United Airlines then Alaska Airlines and Southwest Airlines | 1,734 km | ~4h 45m |
| BOI Boise | United Airlines and Southwest Airlines then Alaska Airlines | 1,683 km | ~4h 45m |
| COS Colorado Springs | United Airlines then Alaska Airlines | 1,833 km | ~4h 55m |
| GEG Spokane | Frontier Airlines and United Airlines then Alaska Airlines | 1,702 km | ~4h 45m |
| EUG Eugene | Frontier Airlines and United Airlines then Alaska Airlines | 1,976 km | ~5h 5m |
| PSC Pasco | United Airlines then Alaska Airlines | 1,645 km | ~4h 40m |
| RDM Redmond-Bend | United Airlines then Alaska Airlines | 1,809 km | ~4h 50m |
| MFR Medford | United Airlines then Alaska Airlines | 2,113 km | ~5h 15m |
| BZN Bozeman | Frontier Airlines and United Airlines then Alaska Airlines | 1,715 km | ~4h 45m |
| MSO Missoula | United Airlines then Alaska Airlines | 1,715 km | ~4h 45m |
More from Denver and Seattle
- Seattle (SEA) to Denver (DEN) · return route
- All direct flights from Denver (DEN)
- All direct flights from Seattle (SEA)
- Denver to Istanbul (IST)
- Denver to Frankfurt (FRA)
- Denver to Chicago (ORD)
- Denver to Dallas-Fort Worth (DFW)
- Denver to Munich (MUC)
- Denver to London (LHR)
- Denver to Atlanta (ATL)
- Denver to Houston (IAH)
- Denver to New York (JFK)
- Denver to Newark (EWR)
- Denver to Toronto (YYZ)
- Denver to Los Angeles (LAX)
- Istanbul (IST) to Seattle
- Amsterdam (AMS) to Seattle
- Paris (CDG) to Seattle
- Frankfurt (FRA) to Seattle
- Dubai (DXB) to Seattle
- Beijing (PEK) to Seattle
- Chicago (ORD) to Seattle
- Dallas-Fort Worth (DFW) to Seattle
- Shanghai (PVG) to Seattle
- London (LHR) to Seattle
- Atlanta (ATL) to Seattle
- Houston (IAH) to Seattle
Routes come from current airline fares, updated weekly (last update 9 November 2026), plus older schedule data for airports with few recent fares. “Direct” can include a few same-plane flights with a stop. Flight times are estimates from distance. Always check with the airline before booking.