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

ONT Airport Page →
1,697 mi airlines charter/private 14/wk
On-time Some delays Frequent delays
Flight Schedule 4 flights Verified 9m ago
Nonstop Charter / private 1-Stop 2-Stop Hide separate tickets Hide overnight Hide codeshares
  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop
✓
→
UA2171
UA United
739
6:10 AM
PDT T2
12:25 PM
CDT
4h 15m
—
M T W T F S S
Prices
✓
→
UA1121
UA United
738
7:00 AM
PDT T2
1:10 PM
CDT
4h 10m
—
M T W T F S S
Prices
✓
←
UA2800
UA United
738
8:06 PM
CDT T1
10:35 PM
PDT
4h 29m
20%
M T W T F S S
Prices
✓
←
UA658
UA United
739
8:18 PM
CDT T3
10:51 PM
PDT
4h 33m
20%
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
DEN Denver 5h 43m ACF9UA → AAACAY Denver (DEN) to Chicago flights
LAS Las Vegas 5h 46m EJAF9WN → AAACAV Las Vegas (LAS) to Chicago flights
PHX Phoenix 5h 49m AAPDWN → AAACAY Phoenix (PHX) to Chicago flights
SLC Salt Lake City 5h 57m AFAMDL → AAACAF Salt Lake City (SLC) to Chicago flights
SMF Sacramento 6h 23m WN → AAACLH Sacramento (SMF) to Chicago flights
AUS Austin 6h 35m WN → AAACAS Austin (AUS) to Chicago flights
BNA Nashville 6h 39m WN → AAACAS Nashville (BNA) to Chicago flights
DFW Dallas-Fort Worth 6h 41m AABAF9 → AAACAV Dallas-Fort Worth (DFW) to Chicago flights
SFO San Francisco 6h 45m ACCMF9 → AAACAY San Francisco (SFO) to Chicago flights
CVG Cincinnati / Covington 6h 49m AS → AAACAS Cincinnati / Covington (CVG) to Chicago flights
✦ 1-STOP More options, longer trips
✧ 2-STOP Loading... Reach the hardest destinations
Ontario to Chicago
2 carriers, 14 flights/week nonstop.
2 Airlines 1,697 mi 4h 13m nonstop +2h ahead

ONT–ORD is served by 2 airlines with nonstop service. United Airlines and Eastern Airlines LLC lead the route. The flight covers 1,697 miles in approximately 4h 13m. Beyond nonstop, 1-stop connecting options are also available.

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

Airline Landscape

All carriers operating nonstop ONT–ORD service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
UA United Airlines 14 738, 739 4h10-4h15 84% Star Alliance –
2D Eastern Airlines LLC 0 – – 84% – –
Aircraft on this route
738 Boeing 737-800 – UA
739 Boeing 737-900 – UA
Alliance coverage
Star Alliance: UA (14 flights/wk, 100%)
Unaffiliated: 2D (0 flights/wk, 0%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.
Schedule

Weekly Schedule Pattern

Nonstop flight frequency by day of week, ONT to ORD direction.
Mon
2
flights
Tue
2
flights
Wed
2
flights
Thu
2
flights
Fri
2
flights
Sat
2
flights
Sun
2
flights
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
2
Nonstop flights
14
Outbound / wk
14
Return / wk
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for ONT to ORD.
1-STOP
One-Stop Connections
25
Hubs
~5h
Fastest
~42h
Longest
DEN ~5h 43m LAS ~5h 46m PHX ~5h 49m SLC ~5h 57m SMF ~6h 23m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
2,138
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
ONT → ORD
84%
Generally reliable. Most flights run on time.
Departing
84%
Arriving
98%
Return
ORD → ONT
78%
Generally reliable. Most flights run on time.
Departing
78%
Arriving
80%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. ONT delays → ORD delays →
Alternatives

Other ways to reach Chicago from Ontario

Nearby airports with service to Chicago O'Hare International Airport.
Metric ONT→ORD SNA→ORD LGB→ORD
Distance from ONT – 30 mi 36 mi
Nonstop airlines 2 13 2
Weekly flights 14 180 –
Flight time 4h 13m 3h 59m 4h 10m
Departure OTP 84% – –
Santa Ana (SNA) to Chicago flights · Long Beach (LGB) to Chicago flights · Los Angeles (LAX) to Chicago flights
Airports within 200 miles of ONT with service to Chicago O'Hare International Airport.
Know before you go

Travel Essentials

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

When it's 6:00 PM in Ontario, it's 8:00 PM in Chicago.
Distance & Flight Time
1,697 mi / 2,730 km
Nonstop flight time is approximately 4h 13m gate to gate.
Getting from ORD

CTA Blue Line runs 24/7 from O'Hare to downtown Chicago (45 min, $5). Taxis use a flat-rate zone system; downtown is around $40–45 plus tip. Ride-shares are typically $30–50.The Airport Transit System (ATS) connects all terminals and parking. Metra commuter rail does not serve O'Hare directly; transfer downtown via Blue Line.

Chicago Climate

Continental climate with four distinct seasons. Summers are warm and humid (25–32°C) with afternoon thunderstorms. Winters are cold (−10 to −2°C) with heavy snowfall that regularly delays flights December through March.

Spring and fall are mild but unpredictable. Pack layers. Lake Michigan moderates temperatures near the lakefront, but O'Hare sits inland and runs colder.

Check current weather forecasts before travel.
Facts

ONT–ORD Quick Facts

Key statistics for the Ontario to Chicago route.
Route details
Distance1,697 mi / 2,730 km
Flight time4h 13m
Time difference+2 hours
Airlines (nonstop)2
Weekly flights14 out / 14 return
1-stop connectionsAvailable
Origin: ONT
Full nameOntario International Airport
IATA / ICAOONT / KONT
TimezoneAmerica/Los_Angeles
Passengers/yr7.0M
Elevation944 ft / 288 m
Destination: ORD
Full nameChicago O'Hare International Airport
IATA / ICAOORD / KORD
TimezoneAmerica/Chicago
Passengers/yr80.0M
Elevation680 ft / 207 m
FAQ

Frequently Asked Questions

Common questions about ONT to ORD flights.
Nonstop flights from Ontario International Airport to Chicago O'Hare International Airport take about 4h 13m gate to gate. The route covers 1,697 miles.
2 airlines operate flights from ONT to ORD: United Airlines and Eastern Airlines LLC.
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 Denver, Harry Reid and Phoenix Sky Harbor.
Chicago is 2 hours ahead of Ontario.
Yes, return flights from ORD to ONT are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include SNA, LGB and LAX. 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 ONT to ORD

Ontario International Airport (ONT) and Chicago O'Hare International Airport (ORD) are connected by nonstop service from United Airlines and Eastern Airlines LLC. With 14 weekly departures, this is a well served route.

ONT to ORD Flight Duration and Schedule

Nonstop flight time from ONT to ORD is about 4 hours 13 minutes gate to gate. The route covers a distance of 1,697 miles (2,730 km). There are approximately 14 weekly flights outbound and 14 return, totaling 28 flights per week in both directions.

Connecting Options and Alternatives

1-stop connecting options are also available, commonly via Denver, Harry Reid and Phoenix Sky Harbor. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Santa Ana (SNA), Long Beach (LGB) and Los Angeles (LAX).