Santa Rosa

STS · KSTS

Charles M. Schulz Sonoma County Airport

38.51°, -122.81°CA, United States

Passengers a year

796K

#157 busiest in the U.S.

14

nonstop destinations

13

airlines

17

departures a day

81.8%

arrivals on time

1.5%

flights cancelled

75.6%

load factor

The ten busiest routes from STS, by passengers: SEA, SAN, LAX, SNA, PDX, BUR, PHX, LAS, DFW, PSPSTSPDXSEADFWLASPHXPSPBURSNASANLAX
Nonstop routes — the ten busiest. Filed traffic, June 2025 – May 2026.

Airlines

Alaska Airlines is the largest carrier at Santa Rosa, with 78% of all passengers. 13 airlines fly from here.

Share of passengers · each carrier as a slice of the whole airport

Alaska Airlines holds 78% of the airport — the 25th most concentrated of 118 non-hub airports. The nearest comparison is BRW at 80%.

AirlineSharePassengersSeats YoY
AS
Alaska77% fullOperated by SkyWest, Horizon
78.2%622.8K+25.4%
AA
American75% fullAmerican Eagle · operated by Envoy, SkyWest
14.0%111.2K+0.2%
WN
Southwest64% full
4.2%33.6K—
XP
Avelo Airlines72% full
3.5%27.7K-87.2%
UA
United0% fullUnited Express · operated by SkyWest
0.1%583—

Share, passengers and destinations count each airline’s own flights plus the regional flying sold under its brand. On-time covers the airline's own aircraft only — regional affiliates report to the government separately. Seats year on year compares the latest twelve months against the twelve before them.

Destinations

14 nonstop destinations from Santa Rosa, all domestic.

100% domestic · 0% international · by departing passengers

Top domestic destinations

  • Seattle (SEA)

    59.5K departing · 73% full

    Alaska Airlines

  • San Diego (SAN)

    57.4K departing · 78% full

    Alaska Airlines · Southwest Airlines

  • Los Angeles (LAX)

    48.2K departing · 73% full

    Alaska Airlines

  • Santa Ana (SNA)

    45.5K departing · 81% full

    Alaska Airlines

  • Portland (PDX)

    45.2K departing · 77% full

    Alaska Airlines

  • Burbank (BUR)

    43.8K departing · 80% full

    Alaska Airlines · Avelo Airlines · Southwest Airlines

  • Phoenix (PHX)

    39.6K departing · 72% full

    American Airlines

  • Las Vegas (LAS)

    29.5K departing · 80% full

    Alaska Airlines · Southwest Airlines · Avelo Airlines

  • Dallas-Fort Worth (DFW)

    14.9K departing · 79% full

    American Airlines

  • Palm Springs (PSP)

    7.2K departing · 65% full

    Alaska Airlines

All nonstop destinations

14 nonstop · 4 airlines · 14 domestic / 0 intl

Aircraft

By share of departures at Santa Rosa.

Body class · share of departures

  • Embraer E175

    5,165 departures · 79% full

    Regional

    84.0%

  • Boeing 737-800

    347 departures · 67% full

    Narrowbody

    5.6%

  • Boeing 737-700

    316 departures · 68% full

    Narrowbody

    5.1%

  • Airbus A319

    163 departures · 70% full

    Narrowbody

    2.6%

  • Bombardier CRJ-700

    98 departures · 80% full

    Regional

    1.6%

  • Boeing 737 MAX 8

    38 departures · 69% full

    Narrowbody

    0.6%

  • Cessna Citationjet

    5 departures · 26% full

    0.1%

  • Beechcraft Super King Air

    3 departures · 30% full

    0.1%

  • Pilatus PC-12

    3 departures · 23% full

    0.1%

  • Bombardier CRJ-200

    3 departures · 8% full

    Regional

    0.1%

When Santa Rosa 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 May 2026

Annual passengers since 1990

Total passengers, arriving and departing, in every year on record.

Passengers a year

Every year
1990
90,499
1991
70,415
1992
52,053
1993
26,120
2006
4
2007
107,374
2008
200,805
2009
199,873
2010
214,718
2011
228,022
2012
234,882
2013
247,868
2014
252,695
2015
272,022
2016
338,890
2017
400,502
2018
432,839
2019
477,111
2020
193,001
2021
429,527
2022
606,671
2023
635,007
2024
764,953
2025
772,598
2026
325,661 so far

Arriving on time

Of every 100 flights landing at Santa Rosa, 82 touch down within 15 minutes of schedule, 16 arrive late, and 2 are cancelled.

See live FAA delays

Every 100 arrivals

On time 82Late 16Cancelled 2

12 min

average delay

82

flights cancelled

5.3K

arrivals measured

What holds flights up

Share of delay minutes

Most reliable here

Envoy Air 89.5%

Least reliable here

Southwest Airlines 70.4%

Among US airports

#157

On time, month by month

Darker is better · 67.2%–89.6%

The weak spot is July 2025, when 67.2% of arrivals landed on time — 14.6 points below the year. The strongest was March 2026 at 89.6%.

Frequently asked

How busy is Charles M. Schulz Sonoma County Airport (STS)?

Charles M. Schulz Sonoma County Airport handled about 796K passengers over the trailing 12 months, ranking #157 among U.S. airports by passengers, with roughly 17 departures a day.

Which airline is the largest at Charles M. Schulz Sonoma County Airport (STS)?

Alaska Airlines is the largest carrier at Santa Rosa (STS), flying about 78% of its passengers. 13 airlines serve Santa Rosa in total.

How many places can you fly nonstop from Charles M. Schulz Sonoma County Airport (STS)?

Santa Rosa (STS) has 14 nonstop destinations, all domestic.

How often do flights arrive on time at Charles M. Schulz Sonoma County Airport (STS)?

About 81.8% of flights arriving at Santa Rosa (STS) touch down within 15 minutes of schedule, per US DOT figures. About 1.5% are cancelled.

What aircraft flies most from Charles M. Schulz Sonoma County Airport (STS)?

The Embraer E175 flew the largest share of departures from Santa Rosa (STS), about 84% of the total.

Departing counts passengers leaving Santa Rosa. Data: traffic June 2025 – May 2026, on-time July 2025 – June 2026. Source: US DOT Bureau of Transportation Statistics (T-100 Segment, On-Time Performance).