Flight Routes from Chicago to Ontario

Compare cheap outbound and return flights from Chicago (CHI) to Ontario (ONT) and find the best offer from numerous airlines and travel agencies.

Trip type
Cheapest roundtrip flight
from€355
Fastest outbound flight
Fastest inbound flight
non-stop flights
9x / week
Flight distance
2,754 km
Time difference
Airports in Chicago
  1. O'Hare International Airport, IL
  2. Midway International Airport, IL
  3. Rockford, IL

Cheap flight offers from Chicago to Ontario

sorted by price and recency
filters
  1. –
    United Airlines
    –
    CHI–ONT
    1 stopover
    Alaska Airlines
    –
    ONT–CHI
    1 stopover
    €413
  2. –
    United Airlines
    –
    CHI–ONT
    1 stopover
    United Airlines
    –
    ONT–CHI
    1 stopover
    €476
  3. –
    Alaska Airlines
    –
    CHI–ONT
    1 stopover
    Alaska Airlines
    –
    ONT–CHI
    1 stopover
    €469
  4. –
    Aeroméxico
    –
    CHI–ONT
    3 stopovers
    Volaris
    –
    ONT–CHI
    2 stopovers
    €925
  5. –
    United Airlines
    –
    CHI–ONT
    1 stopover
    United Airlines
    –
    ONT–CHI
    1 stopover
    €467
  6. –
    Southwest Airlines
    –
    CHI–ONT
    non-stop flight
    Southwest Airlines
    –
    ONT–CHI
    non-stop flight
    €355

Flight schedule from Chicago (CHI) to Ontario (ONT)

Select a travel date in the flight schedule for the route from Chicago (CHI) to Ontario (ONT) and compare affordable flight deals.

offers
Active filtersnone
Matching outbound flightsCHI–ONT · 6 of 6
fromto
dep.arr.
durationstopovers
  1. November 8 – 14, 2026
  2. November 15 – 21, 2026
  3. November 22 – 28, 2026
    1. ORDONT
      nonstop
      1. United Airlines
    2. MDWONT
      nonstop
      1. Southwest Airlines
    3. MDWONT
      nonstop
      1. Southwest Airlines
    4. MDWONT
      nonstop
      1. Southwest Airlines
    5. MDWONT
      nonstop
      1. Southwest Airlines
    6. ORDONT
      nonstop
      1. United Airlines

      Important flight information

      Discover more flights around Chicago and Ontario

      Departure airport Airport Chicago-IL, all airports (CHI)
      Arrival airport Airport Ontario-CA (ONT)
      Destination country Flights to United States
      Departure airport - Destination country Chicago-IL, all airports - United States
      Alternative routes to United States
      Alternative flights to Ontario
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