San Francisco International ⇄ Washington Dulles International SFO–IAD
Airlines flew 5,463 flights between San Francisco International SFO in San Francisco, CA and Washington Dulles International IAD in Washington, DC in the twelve months to July 2026, both directions together: 959,391 passengers in 1,117,477 seats, 86% of them filled, and 17,198,978 pounds of freight. 2,418 miles, about 270 minutes in the air, on 7 airlines: United Air Lines Inc. (5,374), Alaska Airlines Inc. (76), Delta Air Lines Inc. (5), Jet Aviation Flight Services, Inc. (4) and 3 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 | 381 |
| 2/25 | 351 |
| 3/25 | 458 |
| 4/25 | 574 |
| 5/25 | 547 |
| 6/25 | 550 |
| 7/25 | 535 |
| 8/25 | 508 |
| 9/25 | 415 |
| 10/25 | 496 |
| 11/25 | 458 |
| 12/25 | 491 |
| 1/26 | 401 |
| 2/26 | 382 |
| 3/26 | 418 |
| 4/26 | 461 |
| 5/26 | 537 |
| 6/26 | 471 |
| 7/26 | 425 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 71,714 |
| 2/25 | 59,370 |
| 3/25 | 77,294 |
| 4/25 | 88,264 |
| 5/25 | 96,242 |
| 6/25 | 98,081 |
| 7/25 | 94,210 |
| 8/25 | 90,374 |
| 9/25 | 74,900 |
| 10/25 | 89,500 |
| 11/25 | 82,612 |
| 12/25 | 82,744 |
| 1/26 | 60,870 |
| 2/26 | 57,753 |
| 3/26 | 73,837 |
| 4/26 | 79,194 |
| 5/26 | 92,606 |
| 6/26 | 88,776 |
| 7/26 | 86,225 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| United Air Lines Inc. UA | 5,374 | 948,072 | 86% | charter cargo service, scheduled passenger service |
| Alaska Airlines Inc. AS | 76 | 10,994 | 81% | scheduled passenger service |
| Delta Air Lines Inc. DL | 5 | 249 | 69% | charter passenger service |
| Jet Aviation Flight Services, Inc. 27Q | 4 | 7 | 13% | charter passenger service |
| Scott Aviation, LLC d/b/a Silver Air 3EQ | 2 | 5 | 18% | charter passenger service |
| American Airlines Inc. AA | 1 | 64 | 33% | charter passenger service |
| Southwest Airlines Co. WN | 1 | 0 | 0% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing B737 Max 900 | 2,582 | 179 | 388,731 |
| Boeing 737-900ER | 720 | 179 | 109,398 |
| B787-900 Dreamliner | 514 | 252 | 119,647 |
| Boeing 757-200 | 492 | 175 | 74,420 |
| Boeing 757-300 | 436 | 234 | 87,424 |
| Boeing 777-200ER/200LR/233LR | 334 | 359 | 103,002 |
| B787-800 Dreamliner | 288 | 243 | 62,156 |
| Boeing 767-300/300ER | 26 | 194 | 3,945 |
| Airbus Industrie A321-200n | 22 | 200 | 3,459 |
| Boeing 767-400/ER | 16 | 231 | 3,056 |
| Boeing 777-300/300ER/333ER | 14 | 250 | 2,506 |
| Boeing B737 Max 800 | 5 | 168 | 449 |
| Boeing 787-10 Dreamliner | 3 | 318 | 601 |
| Airbus Industrie A320-100/200 | 3 | 150 | 298 |
| Gulfstream G450 | 2 | 14 | 3 |
| Boeing 737-800 | 2 | 166 | 287 |
| Gulfstream III/V/ G-V Exec/ G-5/550 | 2 | 14 | 5 |
| Gulfstream Aerospace G500 | 1 | 11 | 3 |
| Dassault Falcon 7X | 1 | 14 | 1 |
SFO → IAD this direction alone · flown January 2025 to July 2026
2,741 flights of 2,730 scheduled, 490,673 passengers in 562,359 seats, 11,529,996 pounds of freight, 46,997 pounds of mail. United Air Lines Inc. 2,696; Alaska Airlines Inc. 38; Jet Aviation Flight Services, Inc. 3; Delta Air Lines Inc. 3; Scott Aviation, LLC d/b/a Silver Air 1.
IAD → SFO this direction alone · flown January 2025 to July 2026
2,722 flights of 2,729 scheduled, 468,718 passengers in 555,118 seats, 5,668,982 pounds of freight, 17,001 pounds of mail. United Air Lines Inc. 2,678; Alaska Airlines Inc. 38; Delta Air Lines Inc. 2; Jet Aviation Flight Services, Inc. 1; Scott Aviation, LLC d/b/a Silver Air 1; American Airlines Inc. 1; Southwest Airlines Co. 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: San Francisco International SFO and Washington Dulles International IAD; all routes.