Philadelphia (PHL) to Seattle (SEA)
Flight time
≈ 5h 33m
Bearing
299° NW
Philadelphia (PHL) to Seattle (SEA) is 2,372 miles (3,818 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies PHL–SEA
Filed traffic dataIn July 2026, American Airlines operated the most departures, one of 3 carriers flying nonstop PHL–SEA; the Airbus A321 was the most common aircraft at 41% of departures; flights ran 93% full.
Departures
353
July 2026
Seats
65,104
both directions
Passengers
60,425
both directions
Load factor
92.8%
RPM ÷ ASM
Who flies PHL–SEA?
American Airlines operated the most nonstop PHL–SEA departures in July 2026 (170), one of 3 carriers on the route.
- AA
170 departures · 32,204 seats
Share of departures48.2%93.4%
Load
- AS
122 departures · 21,440 seats
Share of departures34.6%91.5%
Load
- DL
61 departures · 11,460 seats
Share of departures17.3%93.5%
Load
What plane flies PHL–SEA?
In July 2026, the Airbus A321 flew 41% of PHL–SEA departures — more than any other aircraft type.
- Airbus A321
145 departures · 93.2% load
41.1% - Airbus A321neo
67 departures · 93.6% load
19.0% - Boeing 737 MAX 9
55 departures · 90.3% load
15.6% - Boeing 737-900ER
51 departures · 92.8% load
14.4% - Boeing 737-800
24 departures · 94.4% load
6.8% - Boeing 737 MAX 8
11 departures · 91.6% load
3.1%
How has PHL–SEA traffic changed?
Nonstop PHL–SEA departures rose from 270 in August 2025 to 353 in July 2026.
Monthly nonstop PHL–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
270 departures · 47,543 passengers
95.4%
Load
September 2025
243 departures · 39,573 passengers
88.5%
Load
October 2025
242 departures · 36,456 passengers
81.8%
Load
November 2025
173 departures · 24,884 passengers
79.2%
Load
December 2025
184 departures · 28,493 passengers
84.5%
Load
January 2026
127 departures · 17,557 passengers
74.5%
Load
February 2026
106 departures · 14,774 passengers
75.0%
Load
March 2026
147 departures · 23,397 passengers
86.4%
Load
April 2026
228 departures · 34,242 passengers
83.4%
Load
May 2026
313 departures · 47,960 passengers
83.6%
Load
June 2026
339 departures · 53,144 passengers
86.5%
Load
July 2026
353 departures · 60,425 passengers
92.8%
Load
By direction
Each direction is filed separately — they rarely match.
SEA → PHL
92.1% full
177 departures · 29,974 passengers
PHL → SEA
93.6% full
176 departures · 30,451 passengers
Nonstop PHL–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 Philadelphia (PHL) from Seattle (SEA)?
PHL to SEA is 2,372 miles (3,818 km / 2,061 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from PHL to SEA?
A nonstop covers the 2,372-mile great-circle distance in roughly 5h 33m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies PHL–SEA?
In July 2026, the Airbus A321 flew the largest share of departures (41.1%), followed by the Airbus A321neo (19.0%).
What mileage do I earn flying PHL–SEA?
Distance-based programs credit off the 2,372-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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