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Route

Ontario → Chicago

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

Chicago is currently 2 hours ahead of Ontario.

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 9 min
measured flight time
12 / 12
months seen

Through the year

Per day, month by month

  1. 2Jan2026
  2. 2Feb
  3. 2Mar
  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
ABX Airall year
Air Transport Internationalwinter

Through the day

Departure times

Local time in Ontario. Most departures between 02:00 and 05:00.

  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. 1.1Mon
  2. 2.4Tue
  3. 2.6Wed
  4. 2.5Thu
  5. 1.8Fri
  6. 1.9Sat
  7. 1.7Sun

Fleet

Aircraft observed

  1. Boeing 767-300B76396%
  2. Airbus A300-600A3063%
  3. Boeing 757-200B7521%
  4. Cessna 208 CaravanC2081%
  5. McDonnell Douglas MD-11MD110%
All the numbers in a table
MonthPer daySeenAirlines
January 2026260
  • UPS Airlines35×
  • Air Transport International13×
  • ABX Air12×
February 2026264
  • UPS Airlines36×
  • ABX Air28×
March 2026264
  • UPS Airlines36×
  • ABX Air28×
April 2026266
  • UPS Airlines39×
  • ABX Air26×
  • Air Transport International1×
May 2026254
  • ABX Air27×
  • UPS Airlines27×
June 2026265
  • UPS Airlines36×
  • ABX Air29×
July 2026269
  • UPS Airlines40×
  • ABX Air28×
August 2026258
  • UPS Airlines30×
  • ABX Air27×
  • Air Transport International1×
September 2026268
  • UPS Airlines37×
  • ABX Air30×
  • Air Transport International1×
October 2025244
  • UPS Airlines29×
  • ABX Air15×
November 2025244
  • UPS Airlines25×
  • Air Transport International14×
  • ABX Air5×
December 2025370
  • UPS Airlines45×
  • Air Transport International24×

Airlines observed on this route

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

ABX Air

GB · ABX

Hub: CVG Hebron

50 departure airportsView airline →

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

The airports on this route

Ontario International Airport

Ontario, United StatesONT / KONT

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

91 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center

Airport pageAll direct destinations

Chicago Rockford International Airport

Chicago, United StatesRFD / KRFD

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

51 °F · RainSource: 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.

SBD RFDSan Bernardino International AirportSan Bernardino is about 21 mi from Ontario.View route →LGB RFDLong Beach International AirportLong Beach is about 35 mi from Ontario.View route →BUR RFDHollywood Burbank/Bob Hope AirportBurbank is about 45 mi from Ontario.View route →ONT ORDChicago O'Hare International AirportChicago is about 63 mi from Chicago.View route →

About the route from Ontario to Chicago

The observed direct connection between Ontario International Airport (ONT) and Chicago Rockford International Airport (RFD) covers approximately 1,639 mi. The estimated flight time is around 3h 50m. ABX Air, 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 Ontario from Chicago by air?
The great-circle distance between Ontario International Airport and Chicago Rockford International Airport is approximately 1,639 mi.
How long is the flight from Ontario to Chicago?
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 Ontario to Chicago?
Yes, a direct connection between ONT and RFD has been observed in our route data.
Which airlines have been observed on this route?
In the available route data: ABX Air, Air Transport International and UPS Airlines.
How often is there a flight from Ontario to Chicago?
On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 726 observed flights. Mainly UPS Airlines, ABX Air, Air Transport International. That is an observation, not a timetable.
What is the current time difference between Ontario and Chicago?
Chicago is currently 2 hours ahead of Ontario.

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.