St Mary's
KSM · PASMSt Mary's Airport
Passengers a year
12.4K
#246 busiest in the U.S.
4
nonstop destinations
7
airlines
9
departures a day
35.6%
load factor
Airlines
Grant Aviation is the largest carrier at St Mary's, with 55% of all passengers. 7 airlines fly from here.
Share of passengers · each carrier as a slice of the whole airport
Grant Aviation holds 55% of the airport — the 60th most concentrated of 120 non-hub airports. The nearest comparison is ANI at 56%.
| Airline | Share | Passengers | |
|---|---|---|---|
GV Grant Aviation52% full | 54.9% | 6.8K | 3 |
6F Fox Aircraft35% full | 27.7% | 3.4K | 3 |
K2 Yute Commuter Service17% full | 14.2% | 1.8K | 4 |
7S Ryan Air35% full | 2.6% | 325 | 1 |
V8 Iliamna Air Taxi27% full | 0.4% | 52 | — |
Share, passengers and destinations count each airline’s own flights plus the regional flying sold under its brand.
Destinations
4 nonstop destinations from St Mary's, all domestic.
100% domestic · 0% international · by departing passengers
Top domestic destinations
Grant Aviation · Yute Commuter Service · Fox Aircraft
Mountain Village (MOU)
1.6K1,620 departing · 37% full
Grant Aviation · Fox Aircraft · Yute Commuter Service
800800 departing · 8% full
Fox Aircraft · Yute Commuter Service · Grant Aviation · Ryan Air
Yute Commuter Service
All nonstop destinations
4 nonstop · 4 airlines · 4 domestic / 0 intl
Aircraft
By share of departures at St Mary's.
Cessna C206
1,868 departures · 18% full
56.5%
Cessna 208 Caravan
808 departures · 51% full
24.4%
Piper PA-31
427 departures · 37% full
12.9%
Gipps Aero Ga8 Airvan
101 departures · 33% full
3.0%
Cessna C208B
56 departures · 26% full
1.7%
Pilatus PC-12
31 departures · 39% full
0.9%
De Havilland DHC2 Beaver
13 departures · 0% full
0.4%
Cessna 172 Skyhawk
4 departures · 17% full
0.1%
When St Mary's is busiest
Departures by month over the trailing year. Bars scale to the busiest month.
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Departures a month · peak September 2025
Annual passengers since 1990
Total passengers, arriving and departing, in every year on record.
Passengers a year
Every year
- 1990
- 9,315
- 1991
- 2,191
- 1992
- 4,213
- 1993
- 6,747
- 1994
- 6,130
- 1995
- 2,614
- 1996
- 900
- 2000
- 8
- 2002
- 18,239
- 2003
- 19,210
- 2004
- 20,688
- 2005
- 18,450
- 2006
- 29,273
- 2007
- 30,168
- 2008
- 24,205
- 2009
- 19,760
- 2010
- 22,153
- 2011
- 26,176
- 2012
- 26,432
- 2013
- 29,009
- 2014
- 29,777
- 2015
- 29,845
- 2016
- 27,442
- 2017
- 25,809
- 2018
- 23,861
- 2019
- 23,301
- 2020
- 5,703
- 2021
- 8,926
- 2022
- 13,452
- 2023
- 13,629
- 2024
- 12,264
- 2025
- 12,335
- 2026
- 7,349 so far
Frequently asked
How busy is St Mary's Airport (KSM)?
St Mary's Airport handled about 12.4K passengers over the trailing 12 months, ranking #246 among U.S. airports by passengers, with roughly 9 departures a day.
Which airline is the largest at St Mary's Airport (KSM)?
Grant Aviation is the largest carrier at St Mary's (KSM), flying about 55% of its passengers. 7 airlines serve St Mary's in total.
How many places can you fly nonstop from St Mary's Airport (KSM)?
St Mary's (KSM) has 4 nonstop destinations, all domestic.
What aircraft flies most from St Mary's Airport (KSM)?
The Cessna C206 flew the largest share of departures from St Mary's (KSM), about 56% of the total.
Departing counts passengers leaving St Mary's. Data: traffic August 2025 – July 2026. Source: US DOT Bureau of Transportation Statistics (T-100 Segment).