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.
Look up a route, or build a trip
Change the airports, or add stops for a multi-leg trip.
What actually flies PHL–SEA
Filed traffic dataIn May 2026, American Airlines operated the most departures, one of 3 carriers flying nonstop PHL–SEA; the Airbus A321 was the most common aircraft at 28% of departures; flights ran 84% full.
Departures
313
May 2026
Seats
57,354
both directions
Passengers
47,960
both directions
Load factor
83.6%
RPM ÷ ASM
Who flies PHL–SEA?
American Airlines operated the most nonstop PHL–SEA departures in May 2026 (142), one of 3 carriers on the route.
- AA
142 departures · 26,200 seats
Share of departures45.4%87.7%
Load
- AS
122 departures · 21,648 seats
Share of departures39.0%82.6%
Load
- DL
49 departures · 9,506 seats
Share of departures15.7%74.7%
Load
What plane flies PHL–SEA?
In May 2026, the Airbus A321 flew 28% of PHL–SEA departures — more than any other aircraft type.
- Airbus A321
87 departures · 86.0% load
27.8% - Boeing 737 MAX 9
64 departures · 82.9% load
20.4% - Airbus A321neo
60 departures · 76.7% load
19.2% - Boeing 737-900ER
54 departures · 82.4% load
17.3% - Boeing 737 MAX 8
36 departures · 92.4% load
11.5% - Boeing 737-800
12 departures · 87.0% load
3.8%
How has PHL–SEA traffic changed?
Nonstop PHL–SEA departures rose from 232 in June 2025 to 313 in May 2026.
Monthly nonstop PHL–SEA traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
232 departures · 39,082 passengers
91.6%
Load
July 2025
237 departures · 41,461 passengers
94.4%
Load
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
By direction
Each direction is filed separately — they rarely match.
SEA → PHL
81.0% full
157 departures · 23,317 passengers
PHL → SEA
86.2% full
156 departures · 24,643 passengers
Nonstop PHL–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 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 May 2026, the Airbus A321 flew the largest share of departures (27.8%), followed by the Boeing 737 MAX 9 (20.4%).
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.
Keep exploring
Every route below is its own page.
Popular long-haul routes