Seattle-Tacoma International ⇄ San Diego International SEA–SAN
Airlines flew 9,075 flights between Seattle-Tacoma International SEA in Seattle, WA and San Diego International SAN in San Diego, CA in the twelve months to July 2026, both directions together: 1,233,866 passengers in 1,491,402 seats, 83% of them filled, and 797,548 pounds of freight. 1,050 miles, about 139 minutes in the air, on 6 airlines: Alaska Airlines Inc. (5,399), Delta Air Lines Inc. (3,365), Southwest Airlines Co. (300), SkyWest Airlines Inc. (5) and 2 more. 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 | 701 |
| 2/25 | 606 |
| 3/25 | 699 |
| 4/25 | 732 |
| 5/25 | 829 |
| 6/25 | 845 |
| 7/25 | 873 |
| 8/25 | 838 |
| 9/25 | 764 |
| 10/25 | 677 |
| 11/25 | 633 |
| 12/25 | 697 |
| 1/26 | 661 |
| 2/26 | 608 |
| 3/26 | 760 |
| 4/26 | 818 |
| 5/26 | 843 |
| 6/26 | 869 |
| 7/26 | 907 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 87,603 |
| 2/25 | 79,741 |
| 3/25 | 88,439 |
| 4/25 | 98,262 |
| 5/25 | 103,230 |
| 6/25 | 115,783 |
| 7/25 | 125,830 |
| 8/25 | 124,270 |
| 9/25 | 97,001 |
| 10/25 | 88,396 |
| 11/25 | 81,025 |
| 12/25 | 90,945 |
| 1/26 | 82,120 |
| 2/26 | 82,632 |
| 3/26 | 99,742 |
| 4/26 | 110,080 |
| 5/26 | 114,766 |
| 6/26 | 125,232 |
| 7/26 | 137,657 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Alaska Airlines Inc. AS | 5,399 | 789,998 | 84% | charter passenger service, scheduled passenger service |
| Delta Air Lines Inc. DL | 3,365 | 401,328 | 80% | charter passenger service, scheduled passenger service |
| Southwest Airlines Co. WN | 300 | 42,189 | 88% | scheduled passenger service |
| SkyWest Airlines Inc. OO | 5 | 76 | 20% | scheduled passenger service |
| Horizon Air QX | 4 | 275 | 90% | scheduled passenger service |
| Sun Country Airlines d/b/a MN Airlines SY | 2 | 0 | 0% | charter passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing 737-800 | 3,040 | 160 | 391,033 |
| Boeing 737-900ER | 2,464 | 178 | 368,506 |
| Boeing B737 Max 900 | 2,012 | 178 | 299,376 |
| A220-300 BD-500-1A11 | 479 | 130 | 52,375 |
| A200-100 BD-500-1A10 | 477 | 109 | 45,549 |
| Boeing B737 Max 800 | 279 | 166 | 40,075 |
| Boeing 737-700/700LR/Max 7 | 147 | 135 | 17,399 |
| Airbus Industrie A319 | 98 | 132 | 10,921 |
| Airbus Industrie A321Neoxlr | 47 | 190 | 5,516 |
| Embraer ERJ-175 | 9 | 76 | 351 |
| Boeing 737-900 | 8 | 178 | 1,241 |
| Airbus Industrie A321-200n | 8 | 194 | 1,079 |
| Boeing 757-200 | 5 | 72 | 140 |
| Airbus Industrie A320-100/200 | 2 | 157 | 305 |
SEA → SAN this direction alone · flown January 2025 to July 2026
4,544 flights of 4,620 scheduled, 613,734 passengers in 747,071 seats, 374,476 pounds of freight, 28,255 pounds of mail. Alaska Airlines Inc. 2,708; Delta Air Lines Inc. 1,680; Southwest Airlines Co. 152; SkyWest Airlines Inc. 3; Horizon Air 1.
SAN → SEA this direction alone · flown January 2025 to July 2026
4,531 flights of 4,630 scheduled, 620,132 passengers in 744,331 seats, 423,072 pounds of freight, 171,048 pounds of mail. Alaska Airlines Inc. 2,691; Delta Air Lines Inc. 1,685; Southwest Airlines Co. 148; Horizon Air 3; SkyWest Airlines Inc. 2; Sun Country Airlines d/b/a MN Airlines 2.
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 San Diego International SAN; all routes.