Washington Dulles International ⇄ Boeing Fld/King County International IAD–BFI
Airlines flew 4 flights between Washington Dulles International IAD in Washington, DC and Boeing Fld/King County International BFI in Seattle, WA in the twelve months to July 2026, both directions together: 178 passengers in 500 seats, 36% of them filled. 2,305 miles, about 314 minutes in the air, on 2 airlines: Alaska Airlines Inc. (2), Delta Air Lines Inc. (2). 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 | |
|---|---|
| 2/25 | 2 |
| 3/25 | 1 |
| 5/25 | 2 |
| 1/26 | 2 |
| 6/26 | 1 |
| 7/26 | 1 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 2/25 | 2 |
| 3/25 | 51 |
| 5/25 | 10 |
| 1/26 | 115 |
| 6/26 | 63 |
| 7/26 | 0 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Alaska Airlines Inc. AS | 2 | 115 | 32% | charter passenger service |
| Delta Air Lines Inc. DL | 2 | 63 | 44% | charter passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing 757-200 | 2 | 72 | 63 |
| Boeing B737 Max 900 | 2 | 178 | 115 |
IAD → BFI this direction alone · flown February 2025 to June 2026
2 flights, 110 passengers in 250 seats. Alaska Airlines Inc. 1; Delta Air Lines Inc. 1.
BFI → IAD this direction alone · flown February 2025 to July 2026
2 flights, 68 passengers in 250 seats. Alaska Airlines Inc. 1; Delta Air Lines 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 Boeing Fld/King County International BFI; all routes.