Seattle-Tacoma International ⇄ General Edward Lawrence Logan International SEA–BOS
Airlines flew 4,924 flights between Seattle-Tacoma International SEA in Seattle, WA and General Edward Lawrence Logan International BOS in Boston, MA 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 284 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 |
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.
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.
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 General Edward Lawrence Logan International BOS; all routes.