$315 Cheap Flights from Hamilton (YHM) to Ontario (ONT)

View $315 flight on Sat, Nov 22, 2025Opens in a new window

Popular airlines from John C. Munro Hamilton Intl. Airport (YHM) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Hamilton to Ontario (YHM-ONT)

Prices were available within the past 7 days and start at $315 for one-way flights and $707 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Porter Airlines
Fri, Oct 17 - Mon, Oct 20
YHM
Hamilton
ONT
Ontario
$707 Roundtrip, found 6 days ago
$707
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Fri, Oct 17 from Hamilton to Ontario, returning Mon, Oct 20, priced at $707 found 6 days ago
Porter Airlines
Fri, Oct 17 - Mon, Oct 20
YHM
Hamilton
ONT
Ontario
$747 Roundtrip, found 6 days ago
$747
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Fri, Oct 17 from Hamilton to Ontario, returning Mon, Oct 20, priced at $747 found 6 days ago
Porter Airlines
Fri, Oct 17 - Mon, Oct 20
YHM
Hamilton
ONT
Ontario
$750 Roundtrip, found 6 days ago
$750
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Fri, Oct 17 from Hamilton to Ontario, returning Mon, Oct 20, priced at $750 found 6 days ago
Porter Airlines
Fri, Oct 17 - Mon, Oct 20
YHM
Hamilton
ONT
Ontario
$813 Roundtrip, found 6 days ago
$813
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Fri, Oct 17 from Hamilton to Ontario, returning Mon, Oct 20, priced at $813 found 6 days ago
Porter Airlines
Fri, Oct 17 - Mon, Oct 20
YHM
Hamilton
ONT
Ontario
$868 Roundtrip, found 6 days ago
$868
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Fri, Oct 17 from Hamilton to Ontario, returning Mon, Oct 20, priced at $868 found 6 days ago
Porter Airlines
Fri, Oct 17 - Mon, Oct 20
YHM
Hamilton
ONT
Ontario
$907 Roundtrip, found 6 days ago
$907
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Fri, Oct 17 from Hamilton to Ontario, returning Mon, Oct 20, priced at $907 found 6 days ago
Porter Airlines
Fri, Oct 17 - Mon, Oct 20
YHM
Hamilton
ONT
Ontario
$910 Roundtrip, found 6 days ago
$910
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Fri, Oct 17 from Hamilton to Ontario, returning Mon, Oct 20, priced at $910 found 6 days ago
Porter Airlines
Fri, Oct 17 - Mon, Oct 20
YHM
Hamilton
ONT
Ontario
$937 Roundtrip, found 6 days ago
$937
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Fri, Oct 17 from Hamilton to Ontario, returning Mon, Oct 20, priced at $937 found 6 days ago
Air Canada
Wed, Oct 8 - Sun, Oct 12
YHM
Hamilton
ONT
Ontario
$1,345 Roundtrip, found 5 days ago
$1,345
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed, Oct 8 from Hamilton to Ontario, returning Sun, Oct 12, priced at $1,345 found 5 days ago
WestJet
Sun, Oct 12 - Tue, Oct 14
YHM
Hamilton
ONT
Ontario
$1,553 Roundtrip, found 3 days ago
$1,553
Roundtrip
found 3 days ago
Select WestJet flight, departing Sun, Oct 12 from Hamilton to Ontario, returning Tue, Oct 14, priced at $1,553 found 3 days ago
Flights from Hamilton (YHM) to Ontario (ONT)
Origin airport
John C. Munro Hamilton Intl.
Destination airport
Los Angeles - Ontario Intl.
Roundtrip price
$707
Distance
2108 mi

Hamilton to Ontario Flights

The cheapest times to fly from Hamilton to Ontario

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 Hamilton to Ontario are during the month of October. You can find some of the cheapest flights from Hamilton to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Hamilton to Ontario

Sunday is one of the best days to book for cheap flights from Hamilton to Ontario: 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 Hamilton to Ontario

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 Hamilton to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $315 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 Hamilton to Ontario 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 Hamilton to Ontario 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 John C. Munro Hamilton Intl. Airport (YHM) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Secure a cheap one-way flight from $315 or cheap return flight from $707 from John C. Munro Hamilton Intl. Airport (YHM) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from John C. Munro Hamilton Intl. Airport (YHM) to Los Angeles - Ontario Intl. Airport (ONT)?
October is the most affordable month to fly from YHM to ONT. Traveling during an off-peak travel window is often the key to scoring lower fares.
What is the cheapest airline that flies from John C. Munro Hamilton Intl. Airport (YHM) to Los Angeles - Ontario Intl. Airport (ONT)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from YHM to ONT. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from John C. Munro Hamilton Intl. Airport (YHM) to Los Angeles - Ontario Intl. Airport (ONT)?
You'll need to hop on a flight with a layover when traveling from John C. Munro Hamilton Intl. Airport (YHM) to Los Angeles - Ontario Intl. Airport (ONT). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from YHM to ONT?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from John C. Munro Hamilton Intl. Airport (YHM) to Los Angeles - Ontario Intl. Airport (ONT)?
Book a flight from John C. Munro Hamilton Intl. Airport (YHM) to Los Angeles - Ontario Intl. Airport (ONT) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this time have a 22% higher chance of being canceled, on average.**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 John C. Munro Hamilton Intl. Airport (YHM) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Last-minute bookings from YHM to ONT are usually more expensive. To secure the best prices, start searching for flights ahead of time. That said, if you're flexible with your travel plans, you may land a cheap ticket right before your trip.
Is it cheaper to book a YHM to ONT flight and hotel package?
You can save money by booking a YHM to ONT flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've chosen your ideal accommodations and flights, consider adding extras including car rentals, activities and tours.
Can I cancel or change the date of my flight from John C. Munro Hamilton Intl. Airport (YHM) to Los Angeles - Ontario Intl. Airport (ONT)?
Typically, you can modify or cancel your YHM to ONT flight. However, additional charges may apply, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you want further information, head to our Customer Service portal.

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*Available to One Key members.