Raleigh/Durham (RDU) to Seattle (SEA)
Flight time
≈ 5h 30m
Bearing
304° NW
Raleigh/Durham (RDU) to Seattle (SEA) is 2,349 miles (3,780 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies RDU–SEA
Filed traffic dataIn May 2026, Alaska Airlines operated the most departures, one of 3 carriers flying nonstop RDU–SEA; the Boeing 737-900ER was the most common aircraft at 51% of departures; flights ran 83% full.
Departures
185
May 2026
Seats
32,469
both directions
Passengers
26,861
both directions
Load factor
82.7%
RPM ÷ ASM
Who flies RDU–SEA?
Alaska Airlines operated the most nonstop RDU–SEA departures in May 2026 (123), one of 3 carriers on the route.
- AS
123 departures · 21,537 seats
Share of departures66.5%82.4%
Load
- DL
61 departures · 10,766 seats
Share of departures33.0%83.1%
Load
- UA
1 departures · 166 seats
Share of departures0.5%97.0%
Load
What plane flies RDU–SEA?
In May 2026, the Boeing 737-900ER flew 51% of RDU–SEA departures — more than any other aircraft type.
- Boeing 737-900ER
95 departures · 83.0% load
51.3% - Boeing 737 MAX 9
56 departures · 81.7% load
30.3% - Boeing 737-800
27 departures · 82.8% load
14.6% - Boeing 737 MAX 8
6 departures · 87.0% load
3.2% - Airbus A321neo
1 departures · 91.2% load
0.5%
How has RDU–SEA traffic changed?
Nonstop RDU–SEA departures rose from 180 in June 2025 to 185 in May 2026.
Monthly nonstop RDU–SEA traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
180 departures · 28,576 passengers
89.2%
Load
July 2025
188 departures · 30,705 passengers
91.6%
Load
August 2025
172 departures · 28,012 passengers
91.9%
Load
September 2025
152 departures · 21,938 passengers
82.2%
Load
October 2025
129 departures · 17,803 passengers
81.0%
Load
November 2025
131 departures · 17,253 passengers
77.8%
Load
December 2025
143 departures · 20,991 passengers
87.2%
Load
January 2026
125 departures · 15,745 passengers
74.9%
Load
February 2026
108 departures · 13,953 passengers
77.0%
Load
March 2026
138 departures · 19,998 passengers
85.3%
Load
April 2026
162 departures · 22,365 passengers
80.7%
Load
May 2026
185 departures · 26,861 passengers
82.7%
Load
By direction
Each direction is filed separately — they rarely match.
SEA → RDU
78.8% full
94 departures · 13,007 passengers
RDU → SEA
86.8% full
91 departures · 13,854 passengers
Nonstop RDU–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Raleigh/Durham (RDU) from Seattle (SEA)?
RDU to SEA is 2,349 miles (3,780 km / 2,041 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from RDU to SEA?
A nonstop covers the 2,349-mile great-circle distance in roughly 5h 30m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies RDU–SEA?
In May 2026, the Boeing 737-900ER flew the largest share of departures (51.3%), followed by the Boeing 737 MAX 9 (30.3%).
What mileage do I earn flying RDU–SEA?
Distance-based programs credit off the 2,349-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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