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Cheap Flights from Ontario to Chicago - ONT to CHI (reverse)

Popular Flights from Ontario to Chicago

  • Airfare from Ontario to Chicago on American from $290 round trip
  • Airfare from Ontario to Chicago on Delta from $290 round trip
  • Airfare from Ontario to Chicago on United from $290 round trip
  • Airfare from Ontario to Chicago on US Airways from $290 round trip
  • Airfare from Ontario to Chicago on Alaska from $580 round trip

Did You Know?

  • 8 airlines operate between Ontario, CA and Chicago, IL
  • Southwest has the most nonstop flights between Ontario, CA and Chicago, IL.
  • Southwest has 1 nonstop flight between Ontario, CA and Chicago, IL.
  • The smallest aircraft operated by KLM flying between Ontario, CA and Chicago, IL is a 737 with 144 seats.
  • 118,819 seats are available per day to fly out of Ontario, CA connecting to Chicago, IL
  • Denver, CO is the most popular connection for one stop flights between Ontario, CA and Chicago, IL.
  • 89 flights per week fly out of Ontario, CA connecting to Chicago, IL
  • The shortest flight between Ontario, CA and Chicago, IL on United is 1,702 miles.

Advance Purchase Prices from Ontario to Chicago

  • Carrier
    0 Days
    1 Day
    3 Days
    7 Days
    10 Days
    14 Days
    21 Days
  • Alaska
    $1013
    $1013
    $1013
    $809
    $809
    $663
    $663
  • American
    $811
    $811
    $301
    $241
    $241
    $311
    $351
  • Continental
    $819
    $819
    $819
    $289
    $289
    $359
    $359
  • Delta
    $811
    $811
    $811
    $281
    $281
    $429
    $429
  • US Airways
    $439
    $439
    $439
    $249
    $249
    $319
    $319
  • United
    $819
    $819
    $819
    $289
    $289
    $359
    $359

Daily Non-stop Flight Schedules from Ontario International to Chicago Midway

  • Airline
    Mon
    Tue
    Wed
    Thu
    Fri
    Sat
    Sun
    Earliest Flight
    Latest Flight
  • Southwest
    1
    1
    1
    1
    1
    1
    1
    7:00 AM
    2:00 PM

Cheap Domestic Flights from Ontario - ONT

Flights
Airline
Lowest Price
American, US Airways, Alaska, United, Delta
$176
United, Alaska, US Airways
$136
Delta, US Airways, United, Alaska, American
$233
Alaska, American, US Airways, Delta, United
$176
United, US Airways, American, AirTran
$296
Cheap Flights from Ontario to Chicago, from $290 Round trip from ONT to CHI