Denver (DEN) to Seattle (SEA)
Flight time
≈ 2h 51m
Bearing
307° NW
Denver (DEN) to Seattle (SEA) is 1,022 miles (1,645 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
Look up a route, or build a trip
Change the airports, or add stops for a multi-leg trip.
What actually flies DEN–SEA
Filed traffic dataIn July 2026, United Airlines operated the most departures, one of 5 carriers flying nonstop DEN–SEA; the Boeing 737 MAX 8 was the most common aircraft at 18% of departures; flights ran 88% full.
Departures
1,353
July 2026
Seats
234,590
both directions
Passengers
207,201
both directions
Load factor
88.3%
RPM ÷ ASM
Who flies DEN–SEA?
United Airlines operated the most nonstop DEN–SEA departures in July 2026 (405), one of 5 carriers on the route.
- UA
405 departures · 71,945 seats
Share of departures29.9%88.8%
Load
- AS
337 departures · 59,187 seats
Share of departures24.9%87.1%
Load
- WN
302 departures · 51,786 seats
Share of departures22.3%90.8%
Load
- DL
185 departures · 24,244 seats
Share of departures13.7%83.7%
Load
- F9
124 departures · 27,428 seats
Share of departures9.2%89.3%
Load
What plane flies DEN–SEA?
In July 2026, the Boeing 737 MAX 8 flew 18% of DEN–SEA departures — more than any other aircraft type.
- Boeing 737 MAX 8
241 departures · 90.4% load
17.8% - Airbus A321neo
223 departures · 90.4% load
16.5% - Boeing 737-900ER
208 departures · 85.9% load
15.4% - Boeing 737-800
202 departures · 89.1% load
14.9% - Airbus A220-300
175 departures · 84.6% load
12.9% - Boeing 737 MAX 9
136 departures · 87.0% load
10.1% - Airbus A320
77 departures · 86.2% load
5.7% - Boeing 737-700
28 departures · 91.4% load
2.1% - Airbus A321
28 departures · 86.9% load
2.1% - Airbus A320neo
28 departures · 92.8% load
2.1% - Airbus A220-100
3 departures · 92.0% load
0.2% - Airbus A319
2 departures · 65.9% load
0.1% - Boeing 757-200
1 departures · 93.1% load
0.1% - Boeing 787-9
1 departures · 94.2% load
0.1%
How has DEN–SEA traffic changed?
Nonstop DEN–SEA departures rose from 1,275 in August 2025 to 1,353 in July 2026.
Monthly nonstop DEN–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
1,275 departures · 202,035 passengers
92.1%
Load
September 2025
1,149 departures · 171,901 passengers
88.2%
Load
October 2025
1,104 departures · 159,436 passengers
85.6%
Load
November 2025
912 departures · 125,010 passengers
83.3%
Load
December 2025
929 departures · 131,752 passengers
87.0%
Load
January 2026
864 departures · 112,844 passengers
84.0%
Load
February 2026
808 departures · 106,434 passengers
83.7%
Load
March 2026
891 departures · 123,455 passengers
89.0%
Load
April 2026
940 departures · 130,644 passengers
86.1%
Load
May 2026
1,093 departures · 158,982 passengers
85.4%
Load
June 2026
1,256 departures · 190,193 passengers
87.3%
Load
July 2026
1,353 departures · 207,201 passengers
88.3%
Load
By direction
Each direction is filed separately — they rarely match.
DEN → SEA
89.6% full
678 departures · 104,817 passengers
SEA → DEN
87.0% full
675 departures · 102,384 passengers
Nonstop DEN–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Denver (DEN) from Seattle (SEA)?
DEN to SEA is 1,022 miles (1,645 km / 888 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from DEN to SEA?
A nonstop covers the 1,022-mile great-circle distance in roughly 2h 51m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies DEN–SEA?
In July 2026, the Boeing 737 MAX 8 flew the largest share of departures (17.8%), followed by the Airbus A321neo (16.5%).
What mileage do I earn flying DEN–SEA?
Distance-based programs credit off the 1,022-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
Trip reports on YouTube
Fliers post trip reports from this route to YouTube. These three were matched automatically from public YouTube listings — The Frequent Flier does not host, review, or endorse them.
The Flip Flop Traveller
Floored! (and Grounded) · DELTA AIRLINES A220 First Class 🇺🇸 Denver to Seattle《 The US Series 》
19:53 · Apr 2025
The Trip Reporter
TRIP REPORT | Delta Air Lines (First Class) | Denver to Seattle | Airbus A220-300
22:01 · Dec 2024
MedJet Aviation
Trip Report: Southwest Airlines Seattle to Denver. SEA-DEN
8:07 · Jan 2026
Source: YouTube. Titles, thumbnails, and channel names come from YouTube. Playing a video loads the YouTube player, and using it means you agree to the YouTube Terms of Service; the Google Privacy Policy applies.
Keep exploring
Every route below is its own page.
Popular long-haul routes