Denver to Seattle nonstop
Yes: United, Alaska, Southwest, Delta, Frontier and SkyWest fly direct from Denver (DEN) to Seattle (SEA) about 21 times a day, year-round.
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- Distance and flight time
- 1,024 miles nonstop, about 2 hr 40 min gate to gate. Flight time is an estimate from the great-circle distance; the filings carry distance, not scheduled elapsed time.
- Seasonality
- Flew every month of the last year: busiest in July 2026 (152 flights a week), quietest in January 2026 (97 flights a week).
- Sep 2025: 134 flights a week
- Oct 2025: 124 flights a week
- Nov 2025: 106 flights a week
- Dec 2025: 105 flights a week
- Jan 2026: 97 flights a week
- Feb 2026: 100 flights a week
- Mar 2026: 101 flights a week
- Apr 2026: 109 flights a week
- May 2026: 123 flights a week
- Jun 2026: 146 flights a week
- Jul 2026: 152 flights a week
- Aug 2026: 148 flights a week
Flights a week by month, Sep 2025 to Aug 2026, from US DOT on-time filings. - Who operates the flights
- United 30%, Alaska 24%, Southwest 21%, Delta 11%, Frontier 8%, SkyWest 5% (regional operator) of departures, counted across the August 2026 and February 2026 US DOT on-time filings.
- Fares
- Half of the 11,053 tickets in the US DOT fare survey for Q2 2025 sold between $125 and $250 one way, median $175. The survey runs a couple of quarters behind, so read it as the shape of the route's pricing rather than today's quote.
- Jul to Sep (Q3 2024): median $150 one way, middle half $100 to $225, 13,930 tickets
- Oct to Dec (Q4 2024): median $150 one way, middle half $100 to $250, 10,159 tickets
- Jan to Mar (Q1 2025): median $150 one way, middle half $100 to $225, 7,850 tickets
- Apr to Jun (Q2 2025): median $175 one way, middle half $125 to $250, 11,053 tickets
Jul to Sep, Oct to Dec and Jan to Mar trips were the cheapest (median $150 one way) and Apr to Jun trips cost the most (median $175), in the DOT ticket survey for Q3 2024 to Q2 2025. Bars show the middle half of one-way fares; the mark is the median.
Flying the other way? Seattle to Denver nonstop.
Also nonstop from Denver (DEN)
Busiest other routes out of the same airport
- Phoenix (PHX) about 23 times a day
- Los Angeles (LAX) about 21 times a day
- Salt Lake City (SLC) about 21 times a day
- Chicago (ORD) about 18 times a day
- Las Vegas (LAS) about 18 times a day
- San Diego (SAN) about 17 times a day
- Dallas/Fort Worth (DFW) about 17 times a day
- Minneapolis (MSP) about 17 times a day
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