$153 Cheap Flights from Monterey (MRY) to Ontario (ONT)

View $153 flight on Wed, Jan 14, 2026Opens in a new window

Popular airlines from Monterey Peninsula Airport (MRY) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Monterey to Ontario (MRY-ONT)

Prices were available within the past 7 days and start at $153 for one-way flights and $219 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Dec 13 - Tue, Dec 16
MRY
Monterey
ONT
Ontario
$219 Roundtrip, found 15 hours ago
$219
Roundtrip
found 15 hours ago
Select United flight, departing Sat, Dec 13 from Monterey to Ontario, returning Tue, Dec 16, priced at $219 found 15 hours ago
United
Tue, Nov 4 - Tue, Nov 11
MRY
Monterey
ONT
Ontario
$224 Roundtrip, found 18 hours ago
$224
Roundtrip
found 18 hours ago
Select United flight, departing Tue, Nov 4 from Monterey to Ontario, returning Tue, Nov 11, priced at $224 found 18 hours ago
United
Sat, Nov 8 - Sun, Nov 9
MRY
Monterey
ONT
Ontario
$229 Roundtrip, found 7 hours ago
$229
Roundtrip
found 7 hours ago
Select United flight, departing Sat, Nov 8 from Monterey to Ontario, returning Sun, Nov 9, priced at $229 found 7 hours ago
United
Sat, Nov 1 - Wed, Nov 12
MRY
Monterey
ONT
Ontario
$234 Roundtrip, found 2 hours ago
$234
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Nov 1 from Monterey to Ontario, returning Wed, Nov 12, priced at $234 found 2 hours ago
United
Sat, Dec 13 - Tue, Dec 16
MRY
Monterey
ONT
Ontario
$240 Roundtrip, found 15 hours ago
$240
Roundtrip
found 15 hours ago
Select United flight, departing Sat, Dec 13 from Monterey to Ontario, returning Tue, Dec 16, priced at $240 found 15 hours ago
United
Fri, Nov 14 - Sun, Nov 16
MRY
Monterey
ONT
Ontario
$244 Roundtrip, found 1 day ago
$244
Roundtrip
found 1 day ago
Select United flight, departing Fri, Nov 14 from Monterey to Ontario, returning Sun, Nov 16, priced at $244 found 1 day ago
Alaska Airlines
Thu, Jan 29 - Thu, Feb 5
MRY
Monterey
ONT
Ontario
$244 Roundtrip, found 2 days ago
$244
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Jan 29 from Monterey to Ontario, returning Thu, Feb 5, priced at $244 found 2 days ago
Hawaiian Airlines
Sat, Mar 7 - Tue, Mar 10
MRY
Monterey
ONT
Ontario
$244 Roundtrip, found 6 days ago
$244
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Sat, Mar 7 from Monterey to Ontario, returning Tue, Mar 10, priced at $244 found 6 days ago
United
Fri, Nov 21 - Fri, Nov 28
MRY
Monterey
ONT
Ontario
$248 Roundtrip, found 9 hours ago
$248
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Nov 21 from Monterey to Ontario, returning Fri, Nov 28, priced at $248 found 9 hours ago
American Airlines
Sat, Dec 13 - Tue, Dec 16
MRY
Monterey
ONT
Ontario
$391 Roundtrip, found 15 hours ago
$391
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Sat, Dec 13 from Monterey to Ontario, returning Tue, Dec 16, priced at $391 found 15 hours ago

Find the cheapest month to fly from Monterey (MRY) to Ontario (ONT)

May is typically the cheapest month to fly

From $218 - $767 per traveler.

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to John Wayne SNA. Average driving time to city center is 42 minutes. Flights from $294
SNA
John Wayne
Average driving time to city center42 min
Flights from $294

Frequently asked questions

How much does a flight from Monterey Peninsula Airport (MRY) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Grab a cheap one-way flight from $153 or cheap return flight from $219 from Monterey Peninsula Airport (MRY) 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 Monterey Peninsula Airport (MRY) to Los Angeles - Ontario Intl. Airport (ONT)?
December is the least expensive month to fly from MRY to ONT. Planning your trip for the off-season is often the key to landing a great deal.
Which airlines fly direct from Monterey Peninsula Airport (MRY) to Los Angeles - Ontario Intl. Airport (ONT)?
Although Monterey, CA (MRY-Monterey Peninsula) has no direct flights to Los Angeles - Ontario Intl. Airport (ONT), other airports have nonstop routes. Taking off from Norman Y. Mineta San Jose Intl. Airport (SJC) will get you to Ontario without any detours.
What is the cheapest airline that flies from Monterey Peninsula Airport (MRY) to Los Angeles - Ontario Intl. Airport (ONT)?
To find the cheapest airline that'll fly you from MRY to ONT, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Monterey Peninsula Airport (MRY) to Los Angeles - Ontario Intl. Airport (ONT)?
There are no daily nonstop flights from Monterey Peninsula Airport (MRY) to Los Angeles - Ontario Intl. Airport (ONT). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from MRY to ONT?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change 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 Monterey Peninsula Airport (MRY) to Los Angeles - Ontario Intl. Airport (ONT)?
To avoid potential delays on the Monterey Peninsula Airport (MRY) to Los Angeles - Ontario Intl. Airport (ONT) route, aim to travel before 3 PM. Later flights are 22% more likely to be 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.
What airports do you fly into for Ontario from Monterey Peninsula Airport (MRY)?
Los Angeles Intl. Airport (LAX) is the only airport in Ontario with direct flights from Monterey Peninsula Airport (MRY). Browse the available options and discover cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Monterey Peninsula Airport (MRY) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Last-minute bookings from MRY to ONT are generally more expensive. To secure the cheapest rates, start looking for flights ahead of time. That said, if your travel plans are flexible, you may score a cheap fare right before you leave.
Is it cheaper to book a MRY to ONT flight and hotel package?
Booking a MRY to ONT flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Choose from our impressive range of hotels and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Monterey Peninsula Airport (MRY) to Los Angeles - Ontario Intl. Airport (ONT)?
It's usually possible to cancel or reschedule your MRY to ONT 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 if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Monterey Peninsula
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Hawaiian Airlines, United
Roundtrip price
$218
Distance
297 mi

Book with confidence

Monterey to Ontario Flights

The cheapest times to fly from Monterey 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 Monterey to Ontario are during the month of December. You can find some of the cheapest flights from Monterey to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Monterey to Ontario

Sunday is one of the best days to book for cheap flights from Monterey 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 Monterey 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 Monterey to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $153 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 Monterey 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 Monterey 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.

 

Monterey to Ontario Flights

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*Available to One Key members.