$453 Cheap Flights from Ontario (ONT) to Columbia (COU)

View $453 flight on Wed, Sep 17, 2025Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Columbia, MO (COU-Columbia Regional)

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Find available prices by choosing your travel dates.

Cheap Flights from Ontario to Columbia (ONT-COU)

Prices were available within the past 7 days and start at $453 for one-way flights and $444 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Jun 7 - Wed, Jun 11
ONT
Ontario
COU
Columbia
$444 Roundtrip, found 2 hours ago
$444
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sat, Jun 7 from Ontario to Columbia, returning Wed, Jun 11, priced at $444 found 2 hours ago
American Airlines
Sat, Jun 7 - Wed, Jun 11
ONT
Ontario
COU
Columbia
$460 Roundtrip, found 5 days ago
$460
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Jun 7 from Ontario to Columbia, returning Wed, Jun 11, priced at $460 found 5 days ago
American Airlines
Sat, Jun 7 - Wed, Jun 11
ONT
Ontario
COU
Columbia
$466 Roundtrip, found 2 days ago
$466
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Jun 7 from Ontario to Columbia, returning Wed, Jun 11, priced at $466 found 2 days ago
American Airlines
Wed, Jul 9 - Sun, Aug 3
ONT
Ontario
COU
Columbia
$474 Roundtrip, found 2 days ago
$474
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Jul 9 from Ontario to Columbia, returning Sun, Aug 3, priced at $474 found 2 days ago
American Airlines
Tue, May 6 - Tue, May 13
ONT
Ontario
COU
Columbia
$476 Roundtrip, found 1 day ago
$476
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, May 6 from Ontario to Columbia, returning Tue, May 13, priced at $476 found 1 day ago
American Airlines
Sat, Jun 7 - Wed, Jun 11
ONT
Ontario
COU
Columbia
$477 Roundtrip, found 4 days ago
$477
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sat, Jun 7 from Ontario to Columbia, returning Wed, Jun 11, priced at $477 found 4 days ago
American Airlines
Tue, Jun 24 - Sat, Jun 28
ONT
Ontario
COU
Columbia
$482 Roundtrip, found 6 days ago
$482
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jun 24 from Ontario to Columbia, returning Sat, Jun 28, priced at $482 found 6 days ago
American Airlines
Tue, Jun 24 - Sat, Jun 28
ONT
Ontario
COU
Columbia
$483 Roundtrip, found 6 days ago
$483
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jun 24 from Ontario to Columbia, returning Sat, Jun 28, priced at $483 found 6 days ago
American Airlines
Tue, Jun 24 - Sat, Jun 28
ONT
Ontario
COU
Columbia
$499 Roundtrip, found 6 days ago
$499
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jun 24 from Ontario to Columbia, returning Sat, Jun 28, priced at $499 found 6 days ago
American Airlines
Fri, Jun 6 - Mon, Jun 9
ONT
Ontario
COU
Columbia
$504 Roundtrip, found 6 days ago
$504
Roundtrip
found 6 days ago
Select American Airlines flight, departing Fri, Jun 6 from Ontario to Columbia, returning Mon, Jun 9, priced at $504 found 6 days ago
Flights from Ontario (ONT) to Columbia (COU)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Columbia Regional
Airlines serving
American Airlines
Roundtrip price
$444
Distance
1442 mi

Ontario to Columbia Flights

The cheapest times to fly from Ontario to Columbia

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Columbia are during the month of June. You can find some of the cheapest flights from Ontario to Columbia with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Ontario to Columbia

Sunday is one of the best days to book for cheap flights from Ontario to Columbia: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Ontario to Columbia

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Columbia in 2025. You can also book with separate airlines for your outbound and return journeys, from $453 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Columbia flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Columbia airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Columbia Regional Airport (COU) cost?
Discover the latest flight deals from ONT to COU by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ONT to COU?
The cheapest flights from ONT to COU are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from ONT to COU?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from ONT to COU. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Columbia Regional Airport (COU)?
Nonstop flights from Los Angeles - Ontario Intl. Airport (ONT) to Columbia Regional Airport (COU) aren’t available daily, so you’ll need to take a flight with a layover. Explore your options with our filter tool. Enter your dates and pick either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from ONT to COU?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can vary depending on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Columbia Regional Airport (COU)?
To avoid potential delays on the Los Angeles - Ontario Intl. Airport (ONT) to Columbia Regional Airport (COU) route, travel before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Columbia Regional Airport (COU) last-minute?
Last-minute fares from ONT to COU are usually more expensive. To secure the best prices, start searching for flights as soon as possible. That being said, if your travel plans are flexible, you may find a cheap ticket right before your journey.
Is it cheaper to book an ONT to COU flight and hotel package?
You’ll generally save money by booking an ONT to COU flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it’s simple to manage everything in one convenient place. Once you’ve selected your preferred accommodations and flights, consider adding extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Columbia Regional Airport (COU)?
Typically, it’s possible to reschedule or cancel your ONT to COU flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline’s policies in your itinerary to see what changes are possible and whether any costs are involved. You’ll also find more details on our Customer Service portal.

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*Available to One Key members.