Chicago O'Hare International Airport
Chicago, United StatesORD / KORD
International hub · 259 direct destinations · 8 runways · longest runway 12,999 ft
51 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Chicago → Ontario
ORD
ChicagoChicago O'Hare International Airport
ChicagoChicago O'Hare International AirportONTOntarioOntario International Airport
OntarioOntario International Airport- Distance
- 1,696 mi
- Estimated flight time
- ~3h 55m
Ontario is currently 2 hours behind Chicago.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 2 flights a day, observed from October 2025 to September 2026.
- 2
- flights per day
- 2
- busiest month · Oct
- 1
- quietest month · Dec
- 3 hr 48 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 1Jan2026
- 1Feb
- 2Mar
- 2Apr
- 2May
- 2Jun
- 2Jul
- 2Aug
- 2Sep
- 2Oct2025
- 2Nov
- 1Dec
Airlines
Who flies it
United Airlinesall year
UPS Airlinesall year
American Airlineswinter
Volarisnow and then
Through the day
Departure times
Local time in Chicago. Most departures between 06:00 and 09:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 1Mon
- 1.6Tue
- 1.6Wed
- 1.7Thu
- 1.8Fri
- 1.9Sat
- 0.7Sun
Fleet
Aircraft observed
- Boeing 767-300B76344%
- Boeing 737-800B73824%
- Boeing 737-900B73919%
- Boeing 737 MAX 8B38M6%
- Boeing 737-700B7374%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 1 | 27 |
|
| February 2026 | 1 | 21 |
|
| March 2026 | 2 | 44 |
|
| April 2026 | 2 | 49 |
|
| May 2026 | 2 | 46 |
|
| June 2026 | 2 | 54 |
|
| July 2026 | 2 | 54 |
|
| August 2026 | 2 | 54 |
|
| September 2026 | 2 | 48 |
|
| October 2025 | 2 | 55 |
|
| November 2025 | 2 | 49 |
|
| December 2025 | 1 | 30 |
|
Airlines observed on this route
From observed callsign routes on ORD-ONT - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Chicago: 259.
- Direct destinations observed from Ontario: 63.
The airports on this route
Ontario International Airport
Ontario, United StatesONT / KONT
Major airport · 63 direct destinations · 2 runways · longest runway 12,198 ft
78 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
MDW ONTChicago Midway International AirportChicago is about 16 mi from Chicago.View route →ORD SNAJohn Wayne Orange County International AirportSanta Ana is about 30 mi from Ontario.View route →ORD HHRJack Northrop Field Hawthorne Municipal AirportHawthorne is about 43 mi from Ontario.View route →ORD LAXLos Angeles International AirportLos Angeles is about 47 mi from Ontario.View route →
About the route from Chicago to Ontario
The observed direct connection between Chicago O'Hare International Airport (ORD) and Ontario International Airport (ONT) covers approximately 1,696 mi. The estimated flight time is around 3h 55m. American Airlines, United Airlines, UPS Airlines and Volaris have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Chicago from Ontario by air?
- The great-circle distance between Chicago O'Hare International Airport and Ontario International Airport is approximately 1,696 mi.
- How long is the flight from Chicago to Ontario?
- Based on the distance, the estimated flight time is about 3h 55m. This is an estimate, not a schedule.
- Is there a direct connection from Chicago to Ontario?
- Yes, a direct connection between ORD and ONT has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: American Airlines, United Airlines, UPS Airlines and Volaris.
- How often is there a flight from Chicago to Ontario?
- On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 531 observed flights. Mainly United Airlines, UPS Airlines, American Airlines. That is an observation, not a timetable.
- What is the current time difference between Chicago and Ontario?
- Ontario is currently 2 hours behind Chicago.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.