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Monterey

$187+ Cheap flights from Ontario to Monterey (ONT - MRY)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MRY
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Ontario to Monterey

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Monterey (MRY). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 31, 2025.

Round-trip from

$279
(United Airlines)

One-way from

$187
(Alaska Airlines)

Popular in

September

Cheapest in

July

Average price

$283
From Ontario to Monterey Regional
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One-way flight from Ontario to Monterey Regional
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Highest demand for flights based on searches. 9% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Ontario to Monterey

Cheapest flights from Ontario to Monterey
Explore the most affordable flight options available from Ontario to Monterey. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:00 amONT - MRY
1 stop4h 33mUnited Airlines
Tue 12/27:00 amMRY - ONT
1 stop5h 17mUnited Airlines
Deal found 7/31$279
This Alaska Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/184:11 pmONT - MRY
1 stop18h 26mAlaska Airlines
Fri 11/218:05 pmMRY - ONT
1 stop13h 35mAlaska Airlines
Deal found 7/30$322
This American Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2912:22 pmONT - MRY
1 stop20h 52mAmerican Airlines
Mon 9/17:05 pmMRY - ONT
1 stop16h 27mAmerican Airlines
Deal found 7/30$421

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Monterey that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Ontario to Monterey that are best for you.

Fly from

Ontario

Fly to

Monterey

Route

Depart

Return

Price

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Sat 11/15

6:00 am-10:33 am

1 stop4h 33m

Monterey Regional

Tue 12/2

7:00 am-12:17 pm

1 stop5h 17m

$279

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Tue 11/18

4:11 pm-10:37 am

1 stop18h 26m

Monterey Regional

Fri 11/21

8:05 pm-9:40 am

1 stop13h 35m

$322

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Fri 9/26

1:10 pm-12:16 pm

1 stop23h 06m

Monterey Regional

Tue 9/30

6:09 am-11:56 am

1 stop29h 47m

$401

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Sat 9/27

11:39 am-11:29 pm

2 stops11h 50m

$187

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Wed 8/20

6:00 am-10:31 am

1 stop4h 31m

$230

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Fri 9/5

1:15 pm-11:29 pm

2 stops10h 14m

$775

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Ontario to Monterey

Have a flexible travel schedule? Discover the best time to fly to Monterey from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Monterey

What is the cheapest month to book a flight from Ontario to Monterey?

Currently, January is the cheapest month in which you can book a flight from Ontario to Monterey (average of $376). Flying from Ontario to Monterey in June is currently the most expensive (average of $488). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to MRY?

Find hourly flight availability from Ontario to Monterey. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Monterey in the afternoon. If you’re flexible enough to do this you can expect to save up to 26% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing Monterey

Get insights into the airlines that provide service to Monterey. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Monterey. Reviews last updated July 31, 2025.
Get a feel of what it's like to fly with Alaska Airlines, United Airlines, and American Airlines from Ontario to Monterey by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,902 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Monterey. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Ontario to Monterey round-trip?

    Cheapflights users have booked flights from Ontario to Monterey round-trip from $279. Other airlines that can offer you cheap pricing are Alaska Airlines, from $322, and American Airlines, from $401. United Airlines is 30% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Ontario to Monterey that include hotel bookings?

    Yes. In addition to deals on Ontario to Monterey flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Monterey?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Monterey.

  • Can I find deals for business class flights from Ontario to Monterey?

    Yes. Cheapflights offers flight deals from Ontario to Monterey by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Monterey?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Monterey (average of $376). Flying from Ontario to Monterey in June is currently the most expensive (average of $488). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top airline flying from Ontario to Monterey

Discover the top airline that operate flights from Ontario to Monterey. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$278Average$383FlexibilityNo cancel feeOn-time69%

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