Dallas (DAL) to Seattle (SEA)
Flight time
≈ 4h 08m
Bearing
315° NW
Dallas (DAL) to Seattle (SEA) is 1,668 miles (2,685 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies DAL–SEA
Filed traffic dataIn July 2026, Southwest Airlines was the only carrier flying nonstop DAL–SEA; the Boeing 737 MAX 8 was the most common aircraft at 51% of departures; flights ran 94% full.
Departures
68
July 2026
Seats
11,520
both directions
Passengers
10,834
both directions
Load factor
94.0%
RPM ÷ ASM
Who flies DAL–SEA?
Southwest Airlines was the only carrier to fly nonstop DAL–SEA in July 2026 (68 departures).
- WN
68 departures · 11,520 seats
Share of departures100.0%94.0%
Load
What plane flies DAL–SEA?
In July 2026, the Boeing 737 MAX 8 flew 51% of DAL–SEA departures — more than any other aircraft type.
- Boeing 737 MAX 8
35 departures · 94.9% load
51.5% - Boeing 737-800
23 departures · 92.2% load
33.8% - Boeing 737-700
10 departures · 95.8% load
14.7%
How has DAL–SEA traffic changed?
Nonstop DAL–SEA departures rose from 65 in August 2025 to 68 in July 2026.
Monthly nonstop DAL–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
65 departures · 9,983 passengers
93.9%
Load
September 2025
60 departures · 8,735 passengers
90.3%
Load
October 2025
2 departures · 266 passengers
76.0%
Load
November 2025
0 departures · 0 passengers
—
Load
December 2025
0 departures · 0 passengers
—
Load
January 2026
0 departures · 0 passengers
—
Load
February 2026
0 departures · 0 passengers
—
Load
March 2026
54 departures · 7,842 passengers
84.3%
Load
April 2026
62 departures · 8,417 passengers
77.7%
Load
May 2026
62 departures · 9,612 passengers
88.9%
Load
June 2026
71 departures · 10,421 passengers
88.1%
Load
July 2026
68 departures · 10,834 passengers
94.0%
Load
By direction
Each direction is filed separately — they rarely match.
DAL → SEA
93.7% full
34 departures · 5,328 passengers
SEA → DAL
94.3% full
34 departures · 5,506 passengers
Nonstop DAL–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 Dallas (DAL) from Seattle (SEA)?
DAL to SEA is 1,668 miles (2,685 km / 1,450 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from DAL to SEA?
A nonstop covers the 1,668-mile great-circle distance in roughly 4h 08m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies DAL–SEA?
In July 2026, the Boeing 737 MAX 8 flew the largest share of departures (51.5%), followed by the Boeing 737-800 (33.8%).
What mileage do I earn flying DAL–SEA?
Distance-based programs credit off the 1,668-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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