General Edward Lawrence Logan International ⇄ Seattle-Tacoma International BOS–SEA
Airlines flew 4,924 flights between General Edward Lawrence Logan International BOS in Boston, MA and Seattle-Tacoma International SEA in Seattle, WA in the twelve months to July 2026, both directions together: 791,241 passengers in 912,217 seats, 87% of them filled, and 3,258,562 pounds of freight. 2,496 miles, about 341 minutes in the air, on 3 airlines: Alaska Airlines Inc. (2,412), Delta Air Lines Inc. (2,026), JetBlue Airways (486). 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 | 313 |
| 2/25 | 280 |
| 3/25 | 380 |
| 4/25 | 390 |
| 5/25 | 452 |
| 6/25 | 508 |
| 7/25 | 551 |
| 8/25 | 539 |
| 9/25 | 457 |
| 10/25 | 451 |
| 11/25 | 320 |
| 12/25 | 315 |
| 1/26 | 245 |
| 2/26 | 242 |
| 3/26 | 341 |
| 4/26 | 342 |
| 5/26 | 506 |
| 6/26 | 549 |
| 7/26 | 617 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 46,660 |
| 2/25 | 41,099 |
| 3/25 | 56,136 |
| 4/25 | 62,104 |
| 5/25 | 74,605 |
| 6/25 | 85,201 |
| 7/25 | 96,490 |
| 8/25 | 94,917 |
| 9/25 | 75,779 |
| 10/25 | 72,454 |
| 11/25 | 48,160 |
| 12/25 | 47,989 |
| 1/26 | 36,984 |
| 2/26 | 35,464 |
| 3/26 | 52,934 |
| 4/26 | 53,611 |
| 5/26 | 81,086 |
| 6/26 | 88,995 |
| 7/26 | 102,868 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Alaska Airlines Inc. AS | 2,412 | 376,566 | 88% | scheduled passenger service |
| Delta Air Lines Inc. DL | 2,026 | 333,842 | 85% | scheduled passenger service |
| JetBlue Airways B6 | 486 | 80,833 | 87% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Airbus Industrie A321-200n | 2,022 | 194 | 333,317 |
| Boeing B737 Max 900 | 1,124 | 178 | 177,027 |
| Boeing 737-900ER | 1,105 | 178 | 173,647 |
| Airbus Industrie A321Neoxlr | 384 | 200 | 67,071 |
| Boeing 737-800 | 144 | 160 | 20,210 |
| Airbus Industrie A320-100/200 | 100 | 162 | 13,428 |
| Boeing B737 Max 800 | 45 | 160 | 6,541 |
BOS → SEA this direction alone · flown January 2025 to July 2026
2,465 flights of 2,504 scheduled, 394,795 passengers in 456,847 seats, 958,084 pounds of freight, 53,174 pounds of mail. Alaska Airlines Inc. 1,204; Delta Air Lines Inc. 1,017; JetBlue Airways 244.
SEA → BOS this direction alone · flown January 2025 to July 2026
2,459 flights of 2,509 scheduled, 396,446 passengers in 455,370 seats, 2,300,478 pounds of freight, 118,853 pounds of mail. Alaska Airlines Inc. 1,208; Delta Air Lines Inc. 1,009; JetBlue Airways 242.
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: General Edward Lawrence Logan International BOS and Seattle-Tacoma International SEA; all routes.