Santa Rosa to Ontario (STS–ONT) — Airlines, Schedules & Connections

STS Airport Page →
423 mi airlines 7/wk
On-time Some delays Frequent delays
Flight Schedule 2 flights Verified 12m ago
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  Flight Airline AC Dep Arr Dur OTP Sched  
✓
→
AS3273
AS Alaska
E75
2:12 PM
PDT
3:42 PM
PDT
1h 30m
—
M T W T F S S
Prices
✓
←
AS3273
AS Alaska
E75
4:22 PM
PDT T2
6:22 PM
PDT
2h
—
M T W T F S S
Prices

No flights match your filters.

No nonstop flights on this route. connecting options below.

✦ 1-STOP
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Santa Rosa to Ontario
1 carrier, 7 flights/week nonstop.
1 Airlines 7 Flights/wk 423 mi 1h 30m nonstop 11 1-stop hubs

STS–ONT is served by 1 airline with nonstop service. Alaska Airlines leads the route. The flight covers 423 miles in approximately 1h 30m. Beyond nonstop, 11 hubs offer 1-stop connections.

Also explore STS Routes ONT Routes STS Live Flights ONT Live Flights ONT Delays
Carriers on this route

Airline Landscape

All carriers operating nonstop STS–ONT service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
AS Alaska Airlines 7 E75 1h30 – Oneworld –
Aircraft on this route
E75 Embraer E175 – AS
Alliance coverage
Oneworld: AS (7 flights/wk, 100%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.
Schedule

Weekly Schedule Pattern

Nonstop flight frequency by day of week, STS to ONT direction.
Mon
1
flight
Tue
1
flight
Wed
1
flight
Thu
1
flight
Fri
1
flight
Sat
1
flight
Sun
1
flight
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
1
Nonstop flights
7
Outbound / wk
7
Return / wk
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for STS to ONT.
1-STOP
One-Stop Connections
11
Hubs
~2h
Fastest
~22h
Longest
VNY ~2h 52m BUR ~3h 17m SLC ~4h 31m DAL ~8h 58m MDW ~9h 12m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
212
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.
Reliability

On-Time Performance

What to expect at each end of your journey.
Outbound
STS → ONT
100%
Generally reliable. Most flights run on time.
Arriving
100%
Return
ONT → STS
100%
Generally reliable. Most flights run on time.
Departing
100%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. ONT delays →
Alternatives

Other ways to reach Ontario from Santa Rosa

Nearby airports with service to Ontario International Airport.
Metric STS→ONT OAK→ONT SFO→ONT
Distance from STS – 63 mi 66 mi
Nonstop airlines 1 1 4
Weekly flights 7 52 50
Flight time 1h 30m 1h 20m 1h 24m
Oakland (OAK) to Ontario flights · San Francisco (SFO) to Ontario flights · Sacramento (SMF) to Ontario flights
Airports within 200 miles of STS with service to Ontario International Airport.
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
0h
Ontario is 0 hours the same as Santa Rosa.
STS: PDT · ONT: PDT

When it's 6:00 PM in Santa Rosa, it's 6:00 PM in Ontario.
Distance & Flight Time
423 mi / 681 km
Nonstop flight time is approximately 1h 30m.
Facts

STS–ONT Quick Facts

Key statistics for the Santa Rosa to Ontario route.
Route details
Distance423 mi / 681 km
Flight time1h 30m
Time difference0 hours
Airlines (nonstop)1
Weekly flights7 out / 7 return
1-stop connections11 hubs
Origin: STS
Full nameCharles M. Schulz Sonoma County Airport
IATA / ICAOSTS / KSTS
TimezoneAmerica/Los_Angeles
Passengers/yr0.8M
Elevation128 ft / 39 m
Destination: ONT
Full nameOntario International Airport
IATA / ICAOONT / KONT
TimezoneAmerica/Los_Angeles
Passengers/yr7.0M
Elevation944 ft / 288 m
FAQ

Frequently Asked Questions

Common questions about STS to ONT flights.
Nonstop flights from Charles M. Schulz Sonoma County Airport to Ontario International Airport take approximately 1h 30m. The route covers 423 miles.
1 airline operates nonstop service: Alaska Airlines.
There are approximately 7 nonstop flights per week from STS to ONT. The return direction has about 7 weekly flights.
Yes, 1-stop connections are available through VNY, BUR, SLC, DAL, MDW, FLL, DEN, PDX, LAS, PHX and SEA. These options provide additional schedule flexibility.
Yes, return flights from ONT to STS are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include OAK, SFO and SMF. See the Alternatives section for a full comparison.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.

Flights from STS to ONT

Charles M. Schulz Sonoma County Airport (STS) and Ontario International Airport (ONT) are connected by nonstop service from Alaska Airlines. With 7 weekly departures, this is a regularly served route.

STS to ONT Flight Duration and Schedule

Nonstop flight time from STS to ONT ranges from 1 hours 30 minutes. The route covers a distance of 423 miles (681 km). There are approximately 7 weekly flights outbound and 7 return, totaling 14 flights per week in both directions.

Connecting Options and Alternatives

11 one-stop connections are available, with the fastest taking approximately 2 hours via VNY. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Oakland (OAK), San Francisco (SFO) and Sacramento (SMF).