$123 Flight Deals from Chicago to Ontario International Airport

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Stops

Nonstop

from $310

Up to 1 stop

$232

Up to 2 stops

$261

Airlines

Alaska Airlines

$232

American Airlines

$320

Delta Air Lines

$256

Frontier Airlines

$247

Hawaiian Airlines

$260

United Airlines

$310

Cabin Class

Economy

$232

Departure Airports

Chicago Midway Airport

$247

Chicago O Hare Airport

$232

Arrival Airports

Ontario International Airport

$232

Layover Airports

Charlotte Douglas International Airport

$336

Dallas Fort Worth International Airport

$320

Denver International Airport

$247

Detroit Metropolitan Airport

$261

George Bush Intercontinental Houston Airport

$347

Harry Reid International Airport

$247

Hartsfield Jackson Atlanta International Airport

$256

Minneapolis-St Paul International/Wold-Chamberlain Airport

$256

Phoenix Sky Harbor International Airport

$320

Salt Lake City International Airport

$256

San Francisco International Airport

$336

Seattle Tacoma International Airport

$232

Best Price. GUARANTEED.

Exclusively for Priceline Members
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On average save $240 per traveler

Alaska Airlines

05/09/25

5:56pm

ORD

6h 3m

SEA

05/09/25

11:59pm

ONT

Alaska Airlines

05/13/25

1:56pm

ONT

10h 3m

SEA

05/13/25

11:59pm

ORD

^$232

Free cancellation within 83 hours of booking

Frontier Airlines

05/09/25

6:15am

MDW

7h 1m

LAS

05/09/25

1:16pm

ONT

Frontier Airlines

05/12/25

12:59am

ONT

18h 9m

DEN

05/12/25

7:08pm

MDW

^$247

Free cancellation within 83 hours of booking

Delta Air Lines

05/29/25

7:15pm

ORD

4h 27m

SLC

05/29/25

11:42pm

ONT

Delta Air Lines

06/03/25

8:25am

ONT

9h 20m

MSP

06/03/25

5:45pm

ORD

^$256

Free cancellation within 83 hours of booking

Delta Air Lines

05/10/25

7:30am

ORD

4h 45m

SLC

05/10/25

12:15pm

ONT

Delta Air Lines

05/17/25

1:45pm

ONT

7h 55m

SLC

05/17/25

9:40pm

ORD

^$256

Free cancellation within 83 hours of booking

Delta Air Lines

06/03/25

5:30am

ORD

5h 38m

ATL

06/03/25

11:08am

ONT

Delta Air Lines

06/09/25

1:15pm

ONT

8h 55m

SLC

06/09/25

10:10pm

ORD

^$256

Free cancellation within 83 hours of booking

Delta Air Lines

05/08/25

5:30am

ORD

5h 38m

ATL

05/08/25

11:08am

ONT

Delta Air Lines

05/16/25

10:00pm

ONT

10h 35m

ATL

05/17/25

8:35am

ORD

^$256

Free cancellation within 83 hours of booking

Delta Air Lines

05/09/25

7:15am

ORD

SEA

05/09/25

2:15pm

ONT

Delta Air Lines

05/16/25

10:00pm

ONT

10h 35m

ATL

05/17/25

8:35am

ORD

^$256

Free cancellation within 83 hours of booking

Delta Air Lines

06/06/25

4:15pm

MDW

6h 14m

ATL

06/06/25

10:29pm

ONT

Delta Air Lines

06/10/25

9:41am

ONT

8h 45m

SLC

06/10/25

6:26pm

MDW

^$256

Free cancellation within 83 hours of booking

Hawaiian Airlines

05/09/25

5:56pm

ORD

6h 3m

SEA

05/09/25

11:59pm

ONT

Hawaiian Airlines

05/13/25

1:56pm

ONT

10h 3m

SEA

05/13/25

11:59pm

ORD

^$260

Free cancellation within 83 hours of booking

Delta Air Lines

05/29/25

4:15pm

MDW

6h 14m

ATL

05/29/25

10:29pm

ONT

Delta Air Lines

06/01/25

10:01am

ONT

11h 26m

SLC

ATL

06/01/25

9:27pm

MDW

^$261

Free cancellation within 83 hours of booking

Delta Air Lines

05/15/25

11:05am

ORD

8h 28m

DTW

ATL

05/15/25

7:33pm

ONT

Delta Air Lines

05/19/25

10:00pm

ONT

12h 3m

ATL

05/20/25

10:03am

ORD

^$261

Free cancellation within 83 hours of booking

Frontier Airlines

05/16/25

5:21pm

ORD

6h 38m

DEN

05/16/25

11:59pm

ONT

Frontier Airlines

05/27/25

12:59am

ONT

22h 53m

DEN

05/27/25

11:52pm

ORD

^$277

Free cancellation within 83 hours of booking

Delta Air Lines

05/12/25

5:40pm

ORD

6h 2m

MSP

SLC

05/12/25

11:42pm

ONT

Delta Air Lines

05/14/25

1:45pm

ONT

7h 55m

SLC

05/14/25

9:40pm

ORD

^$281

Free cancellation within 83 hours of booking

Delta Air Lines

05/25/25

7:30am

ORD

4h 45m

SLC

05/25/25

12:15pm

ONT

Delta Air Lines

06/01/25

7:00am

ONT

10h 45m

SLC

MSP

06/01/25

5:45pm

ORD

^$281

Free cancellation within 83 hours of booking

Delta Air Lines

05/13/25

7:30am

ORD

4h 45m

SLC

05/13/25

12:15pm

ONT

Delta Air Lines

05/16/25

10:00pm

ONT

14h 28m

ATL

DTW

05/17/25

12:28pm

ORD

^$281

Free cancellation within 83 hours of booking

Delta Air Lines

05/08/25

5:30am

ORD

5h 38m

ATL

05/08/25

11:08am

ONT

Delta Air Lines

05/15/25

7:05pm

ONT

12h 44m

SEA

DTW

05/16/25

7:49am

ORD

^$292

Free cancellation within 83 hours of booking

United Airlines

05/29/25

7:55pm

ORD

2h 31m

Direct

05/29/25

10:26pm

ONT

United Airlines

06/03/25

6:20am

ONT

6h 22m

Direct

06/03/25

12:42pm

ORD

^$310

Free cancellation within 83 hours of booking

United Airlines

05/31/25

7:55pm

ORD

2h 31m

Direct

05/31/25

10:26pm

ONT

United Airlines

06/04/25

5:38pm

ONT

6h 21m

Direct

06/04/25

11:59pm

ORD

^$310

Free cancellation within 83 hours of booking

United Airlines

05/30/25

7:55pm

ORD

2h 31m

Direct

05/30/25

10:26pm

ONT

United Airlines

06/03/25

8:15am

ONT

6h 24m

Direct

06/03/25

2:39pm

ORD

^$310

Free cancellation within 83 hours of booking

Frontier Airlines

05/24/25

6:00am

ORD

27h 15m

DEN

05/25/25

9:15am

ONT

Frontier Airlines

05/28/25

7:37pm

ONT

25h 25m

LAS

05/29/25

9:02pm

ORD

^$314

Free cancellation within 83 hours of booking

American Airlines

05/23/25

6:00am

ORD

5h 50m

DFW

05/23/25

11:50am

ONT

American Airlines

05/27/25

11:45pm

ONT

6h 8m

Direct

05/28/25

5:53am

ORD

^$320

Free cancellation within 83 hours of booking

American Airlines

05/11/25

5:00am

ORD

4h 58m

DFW

05/11/25

9:58am

ONT

American Airlines

05/14/25

9:43am

ONT

6h 12m

Direct

05/14/25

3:55pm

ORD

^$320

Free cancellation within 83 hours of booking

American Airlines

05/29/25

7:06am

ORD

4h 44m

PHX

05/29/25

11:50am

ONT

American Airlines

06/03/25

7:45am

ONT

6h 6m

Direct

06/03/25

1:51pm

ORD

^$320

Free cancellation within 83 hours of booking

Hawaiian Airlines

05/10/25

6:00am

ORD

14h 29m

SEA

05/10/25

8:29pm

ONT

Hawaiian Airlines

05/13/25

1:56pm

ONT

10h 3m

SEA

05/13/25

11:59pm

ORD

^$324

Free cancellation within 83 hours of booking

United Airlines

05/30/25

7:10am

ORD

5h 21m

DEN

05/30/25

12:31pm

ONT

United Airlines

06/01/25

6:41pm

ONT

10h 48m

SFO

06/02/25

5:29am

ORD

^$336

Free cancellation within 83 hours of booking

American Airlines

05/07/25

5:00am

ORD

4h 50m

DFW

05/07/25

9:50am

ONT

American Airlines

05/12/25

11:59pm

ONT

9h 35m

DFW

05/13/25

9:34am

ORD

^$336

Free cancellation within 83 hours of booking

American Airlines

06/04/25

1:34pm

ORD

7h 31m

CLT

06/04/25

9:05pm

ONT

American Airlines

06/11/25

12:55pm

ONT

8h 2m

PHX

06/11/25

8:57pm

ORD

^$336

Free cancellation within 83 hours of booking

American Airlines

05/13/25

6:00am

ORD

5h 50m

DFW

05/13/25

11:50am

ONT

American Airlines

05/20/25

6:01am

ONT

8h 25m

PHX

05/20/25

2:26pm

ORD

^$336

Free cancellation within 83 hours of booking

Frontier Airlines

05/26/25

6:25am

MDW

5h 18m

LAS

05/26/25

11:43am

ONT

Frontier Airlines

06/02/25

6:00am

ONT

8h 56m

LAS

06/02/25

2:56pm

MDW

^$337

Free cancellation within 83 hours of booking

United Airlines

05/30/25

7:55pm

ORD

2h 31m

Direct

05/30/25

10:26pm

ONT

United Airlines

06/06/25

3:00pm

ONT

9h 13m

IAH

06/07/25

12:13am

ORD

^$347

Free cancellation within 83 hours of booking

Top Deals on flights from Chicago to Ontario International Airport

Chicago, US (CHI) - Los Angeles, US (LAX)

Alaska Airlines

May 2

5:56pm

ORD

6h 3m

SEA

May 2

11:59pm

ONT

as low as

$123

Chicago, US (CHI) - Los Angeles, US (LAX)

Frontier Airlines

May 11

6:15am

MDW

7h 1m

LAS

May 11

1:16pm

ONT

as low as

$123

Chicago, US (CHI) - Los Angeles, US (LAX)

Frontier Airlines

Apr 22

6:45am

MDW

4h 35m

DEN

Apr 22

11:20am

ONT

as low as

$123

Chicago, US (CHI) - Los Angeles, US (LAX)

Hawaiian Airlines

May 2

5:56pm

ORD

6h 3m

SEA

May 2

11:59pm

ONT

as low as

$123

Chicago, US (CHI) - Los Angeles, US (LAX)

Frontier Airlines

Apr 25

11:41am

ORD

5h 43m

DFW

Apr 25

5:24pm

ONT

as low as

$123

Chicago, US (CHI) - Los Angeles, US (LAX)

Virgin Atlantic

May 2

7:25am

ORD

4h 51m

SLC

May 2

12:16pm

ONT

as low as

$128

Chicago, US (CHI) - Los Angeles, US (LAX)

Delta Air Lines

May 12

12:48pm

MDW

6h 45m

ATL

May 12

7:33pm

ONT

as low as

$128

Chicago, US (CHI) - Los Angeles, US (LAX)

Delta Air Lines

May 17

7:30am

ORD

4h 45m

SLC

May 17

12:15pm

ONT

as low as

$128

Chicago, US (CHI) - Los Angeles, US (LAX)

Delta Air Lines

May 12

9:00am

ORD

10h 33m

DTW

ATL

May 12

7:33pm

ONT

as low as

$133

Chicago, US (CHI) - Los Angeles, US (LAX)

Delta Air Lines

May 8

3:33pm

ORD

8h 9m

MSP

SLC

May 8

11:42pm

ONT

as low as

$133

Chicago, US (CHI) - Los Angeles, US (LAX)

American Airlines

May 14

1:34pm

ORD

7h 31m

CLT

May 14

9:05pm

ONT

as low as

$168

Chicago, US (CHI) - Los Angeles, US (LAX)

United Airlines

May 11

7:10am

ORD

5h 28m

DEN

May 11

12:38pm

ONT

as low as

$168

Flights to Los Angeles

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Flight Deals from Chicago to Ontario International Airport from $123

Stops

Airlines

Cabin Class

Departure Airports

Arrival Airports

Layover Airports

Best Price. GUARANTEED.

Top Deals on flights from Chicago to Ontario International Airport

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