Washington Dulles International ⇄ San Diego International IAD–SAN
Airlines flew 2,779 flights between Washington Dulles International IAD in Washington, DC and San Diego International SAN in San Diego, CA in the twelve months to July 2026, both directions together: 417,735 passengers in 494,293 seats, 85% of them filled, and 56,284 pounds of freight. 2,253 miles, about 298 minutes in the air, on 4 airlines: United Air Lines Inc. (2,058), Alaska Airlines Inc. (718), Delta Air Lines Inc. (2), American Airlines Inc. (1). 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 | 243 |
| 2/25 | 223 |
| 3/25 | 246 |
| 4/25 | 237 |
| 5/25 | 248 |
| 6/25 | 236 |
| 7/25 | 243 |
| 8/25 | 245 |
| 9/25 | 233 |
| 10/25 | 235 |
| 11/25 | 230 |
| 12/25 | 242 |
| 1/26 | 215 |
| 2/26 | 199 |
| 3/26 | 229 |
| 4/26 | 221 |
| 5/26 | 240 |
| 6/26 | 243 |
| 7/26 | 247 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 39,565 |
| 2/25 | 32,598 |
| 3/25 | 39,672 |
| 4/25 | 40,955 |
| 5/25 | 40,743 |
| 6/25 | 38,480 |
| 7/25 | 39,260 |
| 8/25 | 37,249 |
| 9/25 | 32,772 |
| 10/25 | 34,722 |
| 11/25 | 33,235 |
| 12/25 | 35,619 |
| 1/26 | 29,097 |
| 2/26 | 28,515 |
| 3/26 | 35,672 |
| 4/26 | 35,146 |
| 5/26 | 36,107 |
| 6/26 | 39,899 |
| 7/26 | 39,702 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| United Air Lines Inc. UA | 2,058 | 320,508 | 87% | scheduled passenger service |
| Alaska Airlines Inc. AS | 718 | 96,790 | 77% | scheduled passenger service |
| Delta Air Lines Inc. DL | 2 | 260 | 98% | charter passenger service, scheduled passenger service |
| American Airlines Inc. AA | 1 | 177 | 93% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing B737 Max 900 | 1,314 | 179 | 198,712 |
| Boeing 737-900ER | 1,299 | 179 | 197,826 |
| Boeing 737-800 | 102 | 163 | 12,552 |
| Boeing B737 Max 800 | 59 | 164 | 7,748 |
| Boeing 757-300 | 2 | 234 | 460 |
| Boeing 757-200 | 1 | 72 | 69 |
| Airbus Industrie A321Neoxlr | 1 | 190 | 177 |
| Airbus Industrie A321-200n | 1 | 194 | 191 |
IAD → SAN this direction alone · flown January 2025 to July 2026
1,384 flights of 1,403 scheduled, 203,988 passengers in 246,248 seats, 28,054 pounds of freight, 55 pounds of mail. United Air Lines Inc. 1,029; Alaska Airlines Inc. 355.
SAN → IAD this direction alone · flown January 2025 to July 2026
1,395 flights of 1,409 scheduled, 213,747 passengers in 248,045 seats, 28,230 pounds of freight, 669 pounds of mail. United Air Lines Inc. 1,029; Alaska Airlines Inc. 363; Delta Air Lines Inc. 2; American Airlines Inc. 1.
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: Washington Dulles International IAD and San Diego International SAN; all routes.