Seattle-Tacoma International ⇄ Philadelphia International SEA–PHL
Airlines flew 2,725 flights between Seattle-Tacoma International SEA in Seattle, WA and Philadelphia International PHL in Philadelphia, PA in the twelve months to July 2026, both directions together: 428,448 passengers in 499,542 seats, 86% of them filled, and 747,371 pounds of freight. 2,379 miles, about 271 minutes in the air, on 3 airlines: Alaska Airlines Inc. (1,297), American Airlines Inc. (1,262), Delta Air Lines Inc. (166). Planning to fly it yourself? The weather and winds along this route right now.
Flights by month both directions
By month, as a table
| flights | |
|---|---|
| 1/25 | 77 |
| 2/25 | 69 |
| 3/25 | 143 |
| 4/25 | 165 |
| 5/25 | 185 |
| 6/25 | 232 |
| 7/25 | 237 |
| 8/25 | 270 |
| 9/25 | 243 |
| 10/25 | 242 |
| 11/25 | 173 |
| 12/25 | 184 |
| 1/26 | 127 |
| 2/26 | 106 |
| 3/26 | 147 |
| 4/26 | 228 |
| 5/26 | 313 |
| 6/26 | 339 |
| 7/26 | 353 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 12,313 |
| 2/25 | 10,999 |
| 3/25 | 21,425 |
| 4/25 | 26,165 |
| 5/25 | 30,435 |
| 6/25 | 39,082 |
| 7/25 | 41,461 |
| 8/25 | 47,543 |
| 9/25 | 39,573 |
| 10/25 | 36,456 |
| 11/25 | 24,884 |
| 12/25 | 28,493 |
| 1/26 | 17,557 |
| 2/26 | 14,774 |
| 3/26 | 23,397 |
| 4/26 | 34,242 |
| 5/26 | 47,960 |
| 6/26 | 53,144 |
| 7/26 | 60,425 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Alaska Airlines Inc. AS | 1,297 | 199,355 | 87% | scheduled passenger service |
| American Airlines Inc. AA | 1,262 | 204,132 | 85% | scheduled passenger service |
| Delta Air Lines Inc. DL | 166 | 24,961 | 82% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Airbus Industrie A321Neoxlr | 821 | 190 | 137,799 |
| Boeing 737-900ER | 646 | 178 | 100,411 |
| Boeing B737 Max 900 | 583 | 178 | 89,555 |
| Airbus Industrie A321-200n | 445 | 195 | 67,093 |
| Boeing 737-800 | 129 | 162 | 18,001 |
| Boeing B737 Max 800 | 100 | 171 | 15,522 |
| Boeing 757-200 | 1 | 72 | 67 |
SEA → PHL this direction alone · flown January 2025 to July 2026
1,364 flights of 1,390 scheduled, 217,282 passengers in 249,988 seats, 504,241 pounds of freight, 21,000 pounds of mail. Alaska Airlines Inc. 649; American Airlines Inc. 631; Delta Air Lines Inc. 84.
PHL → SEA this direction alone · flown January 2025 to July 2026
1,361 flights of 1,392 scheduled, 211,166 passengers in 249,554 seats, 243,130 pounds of freight, 55,031 pounds of mail. Alaska Airlines Inc. 648; American Airlines Inc. 631; Delta Air Lines Inc. 82.
Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Seattle-Tacoma International SEA and Philadelphia International PHL; all routes.