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Route

Chicago → Ontario

RFDChicagoChicago Rockford International Airport
ONTOntarioOntario International Airport
Distance
1,639 mi
Estimated flight time
~3h 50m

Ontario is currently 2 hours behind Chicago.

Observed nonstop

View the reverse route

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
3
busiest month · Dec
2
quietest month · Oct
3 hr 36 min
measured flight time
12 / 12
months seen

Through the year

Per day, month by month

  1. 2Jan2026
  2. 3Feb
  3. 3Mar
  4. 2Apr
  5. 2May
  6. 2Jun
  7. 2Jul
  8. 2Aug
  9. 2Sep
  10. 2Oct2025
  11. 2Nov
  12. 3Dec

Airlines

Who flies it

UPS Airlinesall year
Air Transport Internationalwinter

Through the day

Departure times

Local time in Chicago. Most departures between 14:00 and 17:00.

  1. 00:00
  2. 01:00
  3. 02:00
  4. 03:00
  5. 04:00
  6. 05:00
  7. 06:00
  8. 07:00
  9. 08:00
  10. 09:00
  11. 10:00
  12. 11:00
  13. 12:00
  14. 13:00
  15. 14:00
  16. 15:00
  17. 16:00
  18. 17:00
  19. 18:00
  20. 19:00
  21. 20:00
  22. 21:00
  23. 22:00
  24. 23:00

Through the week

By weekday

  1. 1.3Mon
  2. 2.6Tue
  3. 2.6Wed
  4. 2.4Thu
  5. 1.5Fri
  6. 0.5Sat
  7. 3.3Sun

Fleet

Aircraft observed

  1. Boeing 767-300B76394%
  2. Boeing 757-200B7524%
  3. Airbus A300-600A3063%
  4. McDonnell Douglas MD-11MD110%
All the numbers in a table
MonthPer daySeenAirlines
January 2026265
  • UPS Airlines39×
  • Air Transport International26×
February 2026372
  • UPS Airlines44×
  • Air Transport International28×
March 2026377
  • UPS Airlines48×
  • Air Transport International28×
April 2026268
  • UPS Airlines44×
  • Air Transport International24×
May 2026259
  • UPS Airlines35×
  • Air Transport International24×
June 2026250
  • UPS Airlines50×
July 2026250
  • UPS Airlines49×
  • Air Transport International1×
August 2026250
  • UPS Airlines49×
  • Air Transport International1×
September 2026245
  • UPS Airlines45×
October 2025245
  • UPS Airlines45×
November 2025265
  • UPS Airlines45×
  • Air Transport International20×
December 2025383
  • UPS Airlines57×
  • Air Transport International26×

Airlines observed on this route

From observed callsign routes on RFD-ONT - not a booking guarantee.

Air Transport International

8C · ATN

Hub: CVG Hebron

44 departure airportsView airline →

UPS Airlines

5X · UPS

Hub: SDF Louisville

154 departure airportsView airline →

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: 61.
  • Direct destinations observed from Ontario: 63.

The airports on this route

Chicago Rockford International Airport

Chicago, United StatesRFD / KRFD

Regional airport · 61 direct destinations · 2 runways · longest runway 10,003 ft

51 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center

Airport pageAll direct destinations

Ontario International Airport

Ontario, United StatesONT / KONT

Major airport · 63 direct destinations · 2 runways · longest runway 12,198 ft

82 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center

Airport pageAll direct destinations

Alternative airports for this journey

Same journey, a different airport nearby - with an observed direct connection.

RFD SBDSan Bernardino International AirportSan Bernardino is about 21 mi from Ontario.View route →RFD LGBLong Beach International AirportLong Beach is about 35 mi from Ontario.View route →RFD LAXLos Angeles International AirportLos Angeles is about 47 mi from Ontario.View route →ORD ONTChicago O'Hare International AirportChicago is about 63 mi from Chicago.View route →

About the route from Chicago to Ontario

The observed direct connection between Chicago Rockford International Airport (RFD) and Ontario International Airport (ONT) covers approximately 1,639 mi. The estimated flight time is around 3h 50m. Air Transport International and UPS Airlines 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 Rockford International Airport and Ontario International Airport is approximately 1,639 mi.
How long is the flight from Chicago to Ontario?
Based on the distance, the estimated flight time is about 3h 50m. This is an estimate, not a schedule.
Is there a direct connection from Chicago to Ontario?
Yes, a direct connection between RFD and ONT has been observed in our route data.
Which airlines have been observed on this route?
In the available route data: Air Transport International and UPS Airlines.
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 729 observed flights. Mainly UPS Airlines, Air Transport International. 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.