Ontario to St Louis (ONT–SUS) — Airlines, Schedules & Connections
Flight Schedule
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No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
✦ 1-Stop
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Hub OTP
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Combos
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Fastest
estimated
Schedule
Unknown
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✧ 2-Stop
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Ontario to St Louis
Route information for ONT to SUS.
+2h ahead
Reliability
On-Time Performance
What to expect at each end of your journey.
Outbound
ONT → SUS
75%
Generally reliable. Most flights run on time.
Departing
75%
Return
SUS → ONT
75%
Generally reliable. Most flights run on time.
Arriving
75%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots.
ONT delays →
Alternatives
Other ways to reach St Louis from Ontario
Nearby airports with service to Spirit of St Louis Airport.
| Metric | ONT→SUS | SNA→SUS | BUR→SUS |
|---|---|---|---|
| Distance from ONT | – | 30 mi | 44 mi |
| Nonstop airlines | – | 4 | 1 |
| Weekly flights | – | – | – |
| Departure OTP | 75% | – | – |
Santa Ana (SNA) to St Louis flights · Burbank (BUR) to St Louis flights · Los Angeles (LAX) to St Louis flights
Airports within 200 miles of ONT with service to Spirit of St Louis Airport.
Know before you go
Travel Essentials
Practical planning for this route.
Time Difference
+2h
St Louis is 2 hours
ahead of
Ontario.
ONT: PDT · SUS: CDT
When it's 6:00 PM in Ontario, it's 8:00 PM in St Louis.
ONT: PDT · SUS: CDT
When it's 6:00 PM in Ontario, it's 8:00 PM in St Louis.
Facts
ONT–SUS Quick Facts
Key statistics for the Ontario to St Louis route.
Route details
Time difference+2 hours
Airlines (nonstop)0
Origin: ONT
Full nameOntario International Airport
IATA / ICAOONT / KONT
TimezoneAmerica/Los_Angeles
Passengers/yr7.0M
Elevation944 ft / 288 m
Destination: SUS
Full nameSpirit of St Louis Airport
IATA / ICAOSUS / KSUS
TimezoneAmerica/Chicago
Elevation463 ft / 141 m
FAQ
Frequently Asked Questions
Common questions about ONT to SUS flights.
St Louis is 2 hours ahead of Ontario.
Yes, return flights from SUS to ONT are available. Use the direction toggle at the top to view the return schedule.
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.
Connecting Options and Alternatives
Nearby alternative airports include Santa Ana (SNA), Burbank (BUR) and Los Angeles (LAX).