Airports · King County International Airport - Boeing Field
Flights from Seattle (BFI)
Airlines flew 4,582 departures out of King County International Airport - Boeing Field (BFI) carrying 28,784 passengers over the 12 months through April 2026. Here's what actually flew — the busiest routes, the carriers, and the aircraft — from US DOT T-100 filings.
What flies from Seattle
US DOT T-100 · filed dataWhat airlines actually flew out of Seattle — departures, seats, and passengers filed with the US DOT (T-100) over the trailing 12 months, not a schedule.
Departures
4,582
April 2026
Seats flown
74,645
Passengers
28,784
Load factor
38.6%
passengers ÷ seats
Busiest routes from Seattle
Where flights from Seattle go most, by departures over the trailing 12 months.
1,514 departures · 8,069 passengers
64.5%
Load
1,394 departures · 2,434 passengers
17.8%
Load
994 departures · 5,488 passengers
67.3%
Load
175 departures · 14 passengers
1.1%
Load
58 departures · 313 passengers
37.6%
Load
24 departures · 66 passengers
1.7%
Load
21 departures · 799 passengers
55.4%
Load
18 departures · 53 passengers
46.5%
Load
17 departures · 1,068 passengers
37.7%
Load
15 departures · 666 passengers
32.3%
Load
14 departures · 434 passengers
24.4%
Load
13 departures · 424 passengers
27.2%
Load
12 departures · 26 passengers
30.2%
Load
12 departures · 420 passengers
48.9%
Load
11 departures · 29 passengers
43.9%
Load
Airlines at Seattle
Ranked by seats flown — the capacity each carrier actually operated out of Seattle.
- M5
Kenmore Air Harbor
23,147 seats · 61.4% load
31.0%
Share
- X4
Air Excursions
12,595 seats · 18.0% load
16.9%
Share
- SY
7,544 seats · 20.6% load
10.1%
Share
- DL
6,832 seats · 40.7% load
9.2%
Share
- AS
4,552 seats · 31.0% load
6.1%
Share
- GCA
3,224 seats · 20.8% load
4.3%
Share
- 37Q
2,939 seats · 37.8% load
3.9%
Share
- AC
Air Canada
2,504 seats · 71.9% load
3.4%
Share
- BY
Britannia Airways
2,296 seats · 0.0% load
3.1%
Share
- X9
1,735 seats · 0.0% load
2.3%
Share
Aircraft flown from Seattle
Aircraft types by share of departures — what actually operated, not what's based here.
Cessna 208 Caravan
2,580 departures · 64.0% load
56.3%
Share
Pilatus PC-12
1,670 departures · 19.3% load
36.4%
Share
66 departures · 25.1% load
1.4%
Share
63 departures · 45.3% load
1.4%
Share
52 departures · 45.5% load
1.1%
Share
24 departures · 34.1% load
0.5%
Share
17 departures · 18.5% load
0.4%
Share
Cessna Citationjet
10 departures · 41.2% load
0.2%
Share
8 departures · 0.0% load
0.2%
Share
Bombardier Global 6000
8 departures · 26.8% load
0.2%
Share
8 departures · 8.8% load
0.2%
Share
Bombardier BD-100-1A10 Challenger 300
7 departures · 21.3% load
0.1%
Share
Monthly departures from Seattle
Monthly departures from Seattle, trailing 12 months through April 2026. Bars scale to the busiest month.
May 2025
309 departures · 2,055 passengers
47.2%
Load
June 2025
453 departures · 2,915 passengers
40.0%
Load
July 2025
577 departures · 2,692 passengers
49.1%
Load
August 2025
599 departures · 3,692 passengers
55.2%
Load
September 2025
513 departures · 2,694 passengers
39.0%
Load
October 2025
463 departures · 3,539 passengers
39.8%
Load
November 2025
342 departures · 2,232 passengers
40.2%
Load
December 2025
309 departures · 2,081 passengers
32.9%
Load
January 2026
313 departures · 1,806 passengers
27.8%
Load
February 2026
263 departures · 1,298 passengers
31.1%
Load
March 2026
211 departures · 1,857 passengers
25.9%
Load
April 2026
230 departures · 1,923 passengers
36.1%
Load
Source: US DOT Bureau of Transportation Statistics, T-100 Segment. Data through April 2026. The DOT publishes roughly three months in arrears.