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 June 2026, Southwest Airlines operated the most departures, one of 3 carriers flying nonstop DAL–SEA; the Boeing 737 MAX 8 was the most common aircraft at 54% of departures; flights ran 88% full.
Departures
71
June 2026
Seats
11,824
both directions
Passengers
10,421
both directions
Load factor
88.1%
RPM ÷ ASM
Who flies DAL–SEA?
Southwest Airlines operated the most nonstop DAL–SEA departures in June 2026 (68), one of 3 carriers on the route.
- WN
68 departures · 11,482 seats
Share of departures95.8%90.0%
Load
- DL
2 departures · 181 seats
Share of departures2.8%48.6%
Load
- AS
1 departures · 161 seats
Share of departures1.4%0.0%
Load
What plane flies DAL–SEA?
In June 2026, the Boeing 737 MAX 8 flew 54% of DAL–SEA departures — more than any other aircraft type.
- Boeing 737 MAX 8
38 departures · 91.8% load
53.5% - Boeing 737-800
20 departures · 83.4% load
28.2% - Boeing 737-700
11 departures · 87.9% load
15.5% - Boeing 757-200
1 departures · 61.1% load
1.4% - Airbus A220-100
1 departures · 40.4% load
1.4%
How has DAL–SEA traffic changed?
Nonstop DAL–SEA departures rose from 67 in July 2025 to 71 in June 2026.
Monthly nonstop DAL–SEA traffic, trailing 12 months through June 2026. Bars scale to the busiest month; months with no filed service show as zero.
July 2025
67 departures · 10,345 passengers
94.2%
Load
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
By direction
Each direction is filed separately — they rarely match.
DAL → SEA
86.1% full
36 departures · 5,085 passengers
SEA → DAL
90.1% full
35 departures · 5,336 passengers
Nonstop DAL–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through June 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 June 2026, the Boeing 737 MAX 8 flew the largest share of departures (53.5%), followed by the Boeing 737-800 (28.2%).
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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