St Mary's
KSM · PASMSt Mary's Airport
Passengers a year
12.4K
#247 busiest in the U.S.
6
nonstop destinations
10
airlines
9
departures a day
34.4%
load factor
Airlines
Grant Aviation is the largest carrier at St Mary's, with 55% of all passengers. 10 airlines fly from here.
Share of passengers · each carrier as a slice of the whole airport
Grant Aviation holds 55% of the airport — the 61st most concentrated of 118 non-hub airports. The nearest comparison is KOT at 55%.
| Airline | Share | Passengers | |
|---|---|---|---|
GV Grant Aviation52% full | 54.5% | 6.7K | 3 |
6F Fox Aircraft36% full | 27.6% | 3.4K | 4 |
K2 Yute Commuter Service17% full | 14.7% | 1.8K | 5 |
7S Ryan Air30% full | 1.6% | 200 | 1 |
7H NEW PACIFIC AIRLINES26% full | 0.5% | 61 | 1 |
+Other airlines | 1.0% | 126 | — |
Share, passengers and destinations count each airline’s own flights plus the regional flying sold under its brand.
Destinations
6 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)
1.6K1,628 departing · 38% full
Grant Aviation · Fox Aircraft · Yute Commuter Service
673673 departing · 7% full
Fox Aircraft · Yute Commuter Service · Grant Aviation · Ryan Air
Marshall (MLL)
167167 departing · 30% full
Yute Commuter Service · Fox Aircraft
3232 departing · 26% full
Yute Commuter Service
NEW PACIFIC AIRLINES
All nonstop destinations
6 nonstop · 5 airlines · 6 domestic / 0 intl
Aircraft
By share of departures at St Mary's.
Cessna C206
1,909 departures · 18% full
57.1%
Cessna 208 Caravan
785 departures · 50% full
23.5%
Piper PA-31
445 departures · 37% full
13.3%
Gipps Aero Ga8 Airvan
107 departures · 35% full
3.2%
Cessna C208B
58 departures · 27% full
1.7%
Pilatus PC-12
21 departures · 37% full
0.6%
De Havilland DHC2 Beaver
13 departures · 0% full
0.4%
De Havilland DHC8-100 Dash-8
4 departures · 26% full
0.1%
Cessna 172 Skyhawk
3 departures · 10% full
0.1%
When St Mary's is busiest
Departures by month over the trailing year. Bars scale to the busiest month.
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
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
- 4,712 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 #247 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. 10 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 6 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 57% of the total.
Departing counts passengers leaving St Mary's. Data: traffic June 2025 – May 2026. Source: US DOT Bureau of Transportation Statistics (T-100 Segment).