Chicago to Ontario (ORD–ONT) — Airlines, Schedules & Connections

ORD Airport Page →
1,697 mi airlines charter/private 7/wk
On-time Some delays Frequent delays
Flight Schedule 4 flights Verified 4m ago
Nonstop Charter / private 1-Stop 2-Stop Hide separate tickets Hide overnight Hide codeshares
  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop
✓
→
UA658
UA United
739
8:18 PM
CDT T1
10:51 PM
PDT
4h 33m
20%
M T W T F S S
Prices
✓
←
UA2826
UA United
739
6:05 AM
PDT T2
12:20 PM
CDT
4h 15m
—
M T W T F S S
Prices
✓
←
UA2171
UA United
739
6:10 AM
PDT T2
12:25 PM
CDT
4h 15m
—
M T W T F S S
Prices
✓
←
UA1314
UA United
739
6:30 AM
PDT T2
12:45 PM
CDT
4h 15m
—
M T W T F S S
Prices

No flights match your filters.

No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.

✦ 1-Stop connections via 10 hubs
PHX Phoenix 5h 51m AAACAY → AAEJAPD Phoenix (PHX) to Ontario flights
LAS Las Vegas 5h 54m AAACAV → F9WNY4 Las Vegas (LAS) to Ontario flights
DEN Denver 5h 57m AAACAY → ACF9UA Denver (DEN) to Ontario flights
SLC Salt Lake City 6h 17m AAACAF → AFAMDL Salt Lake City (SLC) to Ontario flights
DFW Dallas-Fort Worth 6h 37m AAACAV → AABAF9 Dallas-Fort Worth (DFW) to Ontario flights
BNA Nashville 6h 51m AAACAS → WN Nashville (BNA) to Ontario flights
CVG Cincinnati / Covington 7h AAACAS → AS Cincinnati / Covington (CVG) to Ontario flights
AUS Austin 7h 1m AAACAS → WN Austin (AUS) to Ontario flights
SFO San Francisco 7h 15m AAACAY → ACCMEJA San Francisco (SFO) to Ontario flights
ATL Atlanta 7h 26m AAACAF → AFAMDL Atlanta (ATL) to Ontario flights
✦ 1-STOP More options, longer trips
✧ 2-STOP Loading... Reach the hardest destinations
Chicago to Ontario
2 carriers, 7 flights/week nonstop.
2 Airlines 1,697 mi 4h 33m nonstop -2h behind

ORD–ONT is served by 2 airlines with nonstop service. United Airlines and Sun Country Airlines lead the route. The flight covers 1,697 miles in approximately 4h 33m. Beyond nonstop, 1-stop connecting options are also available.

Also explore ORD Routes ONT Routes ORD Live Flights ONT Live Flights ORD Delays ONT Delays
All flights from Ontario (ONT) Ontario to Chicago flights
Carriers on this route

Airline Landscape

All carriers operating nonstop ORD–ONT service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
UA United Airlines 7 739 4h33 67% Star Alliance –
SY Sun Country Airlines 1 – – 67% – –
Aircraft on this route
739 Boeing 737-900 – UA
Alliance coverage
Star Alliance: UA (7 flights/wk, 88%)
Unaffiliated: SY (1 flights/wk, 13%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.
Schedule

Weekly Schedule Pattern

Nonstop flight frequency by day of week, ORD 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
21
Return / wk
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for ORD to ONT.
1-STOP
One-Stop Connections
34
Hubs
~5h
Fastest
~31h
Longest
PHX ~5h 51m LAS ~5h 54m DEN ~5h 57m SLC ~6h 17m BUR ~6h 29m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
2,165
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
ORD → ONT
67%
Moderate delays possible. Allow buffer time.
Departing
67%
Arriving
61%
Return
ONT → ORD
100%
Generally reliable. Most flights run on time.
Departing
100%
Arriving
100%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. ORD delays → ONT delays →
Alternatives

Other ways to reach Ontario from Chicago

Nearby airports with service to Ontario International Airport.
Metric ORD→ONT MDW→ONT RFD→ONT
Distance from ORD – 15 mi 63 mi
Nonstop airlines 2 1 2
Weekly flights 7 8 2
Flight time 4h 33m 4h 5m 3h 49m
Departure OTP 67% – –
Chicago (MDW) to Ontario flights · Chicago/Rockford (RFD) to Ontario flights · Milwaukee (MKE) to Ontario flights
Airports within 200 miles of ORD with service to Ontario International Airport.
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
-2h
Ontario is 2 hours behind Chicago.
ORD: CDT · ONT: PDT

When it's 6:00 PM in Chicago, it's 4:00 PM in Ontario.
Distance & Flight Time
1,697 mi / 2,730 km
Nonstop flight time is approximately 4h 33m gate to gate.
Getting to ORD

CTA Blue Line runs 24/7 from downtown Loop stations to O'Hare (45 min, $5). Pace buses serve suburbs. Ride-shares cost $35–55 from downtown depending on traffic; add 30+ minutes during rush hour on the Kennedy Expressway.Economy parking lots E/F connect via ATS people mover. Terminal 5 (international) is separate from Terminals 1–3; allow extra time for inter-terminal transfers.

Facts

ORD–ONT Quick Facts

Key statistics for the Chicago to Ontario route.
Route details
Distance1,697 mi / 2,730 km
Flight time4h 33m
Time difference-2 hours
Airlines (nonstop)2
Weekly flights7 out / 21 return
1-stop connectionsAvailable
Origin: ORD
Full nameChicago O'Hare International Airport
IATA / ICAOORD / KORD
TimezoneAmerica/Chicago
Passengers/yr80.0M
Elevation680 ft / 207 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 ORD to ONT flights.
Nonstop flights from Chicago O'Hare International Airport to Ontario International Airport take about 4h 33m gate to gate. The route covers 1,697 miles.
2 airlines operate flights from ORD to ONT: United Airlines and Sun Country Airlines.
This route has daily service. Check the schedule above for departure days and times in each direction.
Yes, 1-stop connections are available, ranked by layover time. Common connecting points include Phoenix Sky Harbor, Harry Reid and Denver.
Ontario is 2 hours behind Chicago.
Yes, return flights from ONT to ORD are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include MDW, RFD and MKE. 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 ORD to ONT

Chicago O'Hare International Airport (ORD) and Ontario International Airport (ONT) are connected by nonstop service from United Airlines and Sun Country Airlines. With 7 weekly departures, this is a regularly served route.

ORD to ONT Flight Duration and Schedule

Nonstop flight time from ORD to ONT is about 4 hours 33 minutes gate to gate. The route covers a distance of 1,697 miles (2,730 km). There are approximately 7 weekly flights outbound and 21 return, totaling 28 flights per week in both directions.

Connecting Options and Alternatives

1-stop connecting options are also available, commonly via Phoenix Sky Harbor, Harry Reid and Denver. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Chicago (MDW), Chicago/Rockford (RFD) and Milwaukee (MKE).