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

ORD Airport Page →
1,697 mi airlines 15/wk
On-time Some delays Frequent delays
Flight Schedule 5 flights Verified 6h ago
Nonstop 1-Stop 2-Stop Hide separate tickets Hide overnight
  Flight Airline AC Dep Arr Dur OTP Sched  
✓
→
UA658
UA United
73G
8:00 PM
CDT T1
10:26 PM
PDT
4h 26m
—
M T W T F S S
Prices
✓
→
UA1851
UA United
737
8:09 PM
CDT T1
10:10 PM
PDT
4h 1m
—
M T W T F S S
Prices
✓
→
UA8115
UA United
B38M
11:43 PM
CDT
1:09 AM+1
PDT
3h 26m
—
M T W T F S S
Prices
✓
←
UA2247
UA United
7M9
7:00 AM
PDT T2
12:58 PM
CDT
3h 58m
—
M T W T F S S
Prices
✓
←
UA552
UA United
B38M
11:59 PM
PDT T2
6:02 AM+1
CDT
4h 3m
—
M T W T F S S
Prices

No flights match your filters.

No nonstop flights on this route. connecting options below.

✦ 1-STOP
✧ 2-STOP Loading...
Chicago to Ontario
1 carrier, 15 flights/week nonstop.
1 Airlines 15 Flights/wk 1,697 mi 3h 26m nonstop -2h behind 45 1-stop hubs

ORD–ONT is served by 1 airline with nonstop service. United Airlines leads the route. The flight covers 1,697 miles in approximately 3h 26m. Beyond nonstop, 45 hubs offer 1-stop connections.

Also explore ORD Routes ONT Routes ORD Live Flights ONT Live Flights ORD Delays ONT Delays
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 15 737, 73G, B38M 3h26-4h26 27% Star Alliance –
Aircraft on this route
737 Boeing 737-700 – UA
73G Boeing 737-700 – UA
B38M – UA
Alliance coverage
Star Alliance: UA (15 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, ORD to ONT direction.
Mon
2
flights
Tue
2
flights
Wed
2
flights
Thu
2
flights
Fri
2
flights
Sat
2
flights
Sun
3
flights
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
3
Nonstop flights
15
Outbound / wk
14
Return / wk
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for ORD to ONT.
1-STOP
One-Stop Connections
45
Hubs
~5h
Fastest
~35h
Longest
VNY ~5h 27m SAF ~6h 22m SDF ~6h 23m COS ~6h 30m IND ~6h 39m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
2,212
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
ORD → ONT
27%
Frequent delays expected. Consider flexible booking.
Departing
27%
Arriving
100%
Return
ONT → ORD
67%
Moderate delays possible. Allow buffer time.
Departing
67%
Arriving
85%
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 1 1 2
Weekly flights 15 14 2
Flight time 3h 26m 4h 15m 3h 52m
Departure OTP 27% – –
Chicago (MDW) to Ontario flights · Chicago/Rockford (RFD) 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 3h 26m to 4h 26m.
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 time3h 26m to 4h 26m
Time difference-2 hours
Airlines (nonstop)1
Weekly flights15 out / 14 return
1-stop connections45 hubs
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 approximately 3h 26m to 4h 26m. The route covers 1,697 miles.
1 airline operates nonstop service: United Airlines.
There are approximately 15 nonstop flights per week from ORD to ONT. The return direction has about 14 weekly flights.
Yes, 1-stop connections are available through VNY, SAF, SDF, COS, IND, RFD, CVG, MEM, STS, EWR, HOU, GSO, PHL, MLB, FLL, MIA, SBA, BOI, ANC, SJD, BJX, YUL, KOA, IAH, BNA, ATL, DFW, DEN, LAS, PHX, SLC, SJC, SFO, MDW, SMF, AUS, SEA, CLT, PDX, GDL, BWI, DAL, MLM, TPE and HNL. These options provide additional schedule flexibility.
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 and RFD. 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. With 15 weekly departures, this is a well served route.

ORD to ONT Flight Duration and Schedule

Nonstop flight time from ORD to ONT ranges from 3 hours 26 minutes to 4 hours 26 minutes. The route covers a distance of 1,697 miles (2,730 km). There are approximately 15 weekly flights outbound and 14 return, totaling 29 flights per week in both directions.

Connecting Options and Alternatives

45 one-stop connections are available, with the fastest taking approximately 5 hours via VNY. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Chicago (MDW) and Chicago/Rockford (RFD).