Cheap Flights From Los Angeles - Ontario Intl. (ONT) To O'Hare Intl. (ORD)

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Cheapest Flights from Ontario (ONT) to Chicago (ORD)

The cheapest flights to O'Hare Intl. found within the past 7 days were CA $433 round trip and one way. Prices and availability subject to change. Additional terms may apply.

Thu, Aug. 7 - Tue, Aug. 26
ONT
Ontario
ORD
Chicago
CA $433 Roundtrip, found 5 days ago
CA $433
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Thu, Aug. 7 from Ontario to Chicago, returning Tue, Aug. 26, priced at CA $433 found 5 days ago
Mon, Sep. 1 - Tue, Sep. 16
ONT
Ontario
ORD
Chicago
CA $433 Roundtrip, found 5 days ago
CA $433
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, Sep. 1 from Ontario to Chicago, returning Tue, Sep. 16, priced at CA $433 found 5 days ago
Mon, Sep. 1 - Sat, Sep. 13
ONT
Ontario
ORD
Chicago
CA $435 Roundtrip, found 5 days ago
CA $435
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, Sep. 1 from Ontario to Chicago, returning Sat, Sep. 13, priced at CA $435 found 5 days ago
Mon, Aug. 25 - Tue, Sep. 9
ONT
Ontario
ORD
Chicago
CA $441 Roundtrip, found 5 days ago
CA $441
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Mon, Aug. 25 from Ontario to Chicago, returning Tue, Sep. 9, priced at CA $441 found 5 days ago
Mon, Aug. 25 - Sat, Sep. 6
ONT
Ontario
ORD
Chicago
CA $442 Roundtrip, found 5 days ago
CA $442
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, Aug. 25 from Ontario to Chicago, returning Sat, Sep. 6, priced at CA $442 found 5 days ago
Sat, Aug. 23 - Sat, Sep. 6
ONT
Ontario
ORD
Chicago
CA $444 Roundtrip, found 5 days ago
CA $444
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Aug. 23 from Ontario to Chicago, returning Sat, Sep. 6, priced at CA $444 found 5 days ago
Sun, Aug. 31 - Tue, Sep. 16
ONT
Ontario
ORD
Chicago
CA $452 Roundtrip, found 5 days ago
CA $452
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Sun, Aug. 31 from Ontario to Chicago, returning Tue, Sep. 16, priced at CA $452 found 5 days ago
Wed, Aug. 20 - Thu, Sep. 11
ONT
Ontario
ORD
Chicago
CA $453 Roundtrip, found 5 days ago
CA $453
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Wed, Aug. 20 from Ontario to Chicago, returning Thu, Sep. 11, priced at CA $453 found 5 days ago
Tue, Jul. 29 - Sat, Aug. 16
ONT
Ontario
ORD
Chicago
CA $454 Roundtrip, found 5 days ago
CA $454
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Tue, Jul. 29 from Ontario to Chicago, returning Sat, Aug. 16, priced at CA $454 found 5 days ago
Sat, Aug. 9 - Mon, Aug. 25
ONT
Ontario
ORD
Chicago
CA $466 Roundtrip, found 5 days ago
CA $466
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Aug. 9 from Ontario to Chicago, returning Mon, Aug. 25, priced at CA $466 found 5 days ago
Sat, Aug. 23 - Thu, Sep. 11
ONT
Ontario
ORD
Chicago
CA $467 Roundtrip, found 5 days ago
CA $467
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Sat, Aug. 23 from Ontario to Chicago, returning Thu, Sep. 11, priced at CA $467 found 5 days ago
Thu, Aug. 7 - Sat, Aug. 23
ONT
Ontario
ORD
Chicago
CA $473 Roundtrip, found 5 days ago
CA $473
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Thu, Aug. 7 from Ontario to Chicago, returning Sat, Aug. 23, priced at CA $473 found 5 days ago
Fri, Aug. 22 - Tue, Sep. 9
ONT
Ontario
ORD
Chicago
CA $482 Roundtrip, found 5 days ago
CA $482
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Fri, Aug. 22 from Ontario to Chicago, returning Tue, Sep. 9, priced at CA $482 found 5 days ago
Thu, Aug. 7 - Mon, Aug. 25
ONT
Ontario
ORD
Chicago
CA $486 Roundtrip, found 5 days ago
CA $486
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Thu, Aug. 7 from Ontario to Chicago, returning Mon, Aug. 25, priced at CA $486 found 5 days ago
Wed, Jul. 30 - Tue, Aug. 19
ONT
Ontario
ORD
Chicago
CA $487 Roundtrip, found 5 days ago
CA $487
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Jul. 30 from Ontario to Chicago, returning Tue, Aug. 19, priced at CA $487 found 5 days ago
Wed, Jul. 23 - Tue, Aug. 12
ONT
Ontario
ORD
Chicago
CA $489 Roundtrip, found 5 days ago
CA $489
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Jul. 23 from Ontario to Chicago, returning Tue, Aug. 12, priced at CA $489 found 5 days ago
Tue, Aug. 19 - Thu, Sep. 11
ONT
Ontario
ORD
Chicago
CA $494 Roundtrip, found 5 days ago
CA $494
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Tue, Aug. 19 from Ontario to Chicago, returning Thu, Sep. 11, priced at CA $494 found 5 days ago
Wed, Aug. 27 - Thu, Sep. 18
ONT
Ontario
ORD
Chicago
CA $495 Roundtrip, found 5 days ago
CA $495
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Wed, Aug. 27 from Ontario to Chicago, returning Thu, Sep. 18, priced at CA $495 found 5 days ago
Thu, Aug. 14 - Mon, Sep. 1
ONT
Ontario
ORD
Chicago
CA $567 Roundtrip, found 5 days ago
CA $567
Roundtrip
found 5 days ago
Select American Airlines flight, departing Thu, Aug. 14 from Ontario to Chicago, returning Mon, Sep. 1, priced at CA $567 found 5 days ago
Mon, Jul. 28 - Sat, Aug. 9
ONT
Ontario
ORD
Chicago
CA $603 Roundtrip, found 5 days ago
CA $603
Roundtrip
found 5 days ago
Select JetBlue Airways flight, departing Mon, Jul. 28 from Ontario to Chicago, returning Sat, Aug. 9, priced at CA $603 found 5 days ago

Frequently asked questions

Are there direct flights from Ontario Airport to O'Hare Intl. Airport (ORD)?
Multiple airlines offer passengers flights straight from Ontario Airport to O'Hare Intl. Airport (ORD). These include American Airlines and Frontier Airlines --- check them out if you'd like to land at your destination with no changeover.
What airlines fly from ONT to O'Hare Airport?
You can choose from a few airlines advertising direct flights between Ontario and Chicago. American Airlines (AA) is one of the most reputable. This carrier operates around 34 flights every month. If you need more options, look up the deals on offer from Frontier Airlines (F9). This airline operates 4 flights each month. Between the two, you're bound to find a deal to suit your needs.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.

Popular Flight Routes from Ontario (ONT)

Travelers at ONT love to visit these top cities. Roam to the top destinations from Ontario (ONT) today with the cheap prices from Travelocity!

Popular Flight Routes from Chicago (ORD)

Travelers at ORD love to visit these top cities. Roam to the top destinations from Chicago(ORD) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.