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Monterey

$119+ 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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MRY
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Find cheap flights from Ontario to Monterey with Cheapflights

1. Tell us where you want to go

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Cheap 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 December 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:07 pmONT - MRY
1 stop27h 17mMultiple Airlines
Mon 12/299:52 pmMRY - ONT
1 stop23h 25mMultiple Airlines
Deal found 12/9$274
This United Airlines deal was found by Cheapflights users on 12/9. 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 12/136:00 amONT - MRY
1 stop4h 33mUnited Airlines
Mon 12/152:33 pmMRY - ONT
1 stop3h 04mUnited Airlines
Deal found 12/9$289
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/246:00 amONT - MRY
1 stop4h 29mUnited Airlines
Thu 1/12:30 pmMRY - ONT
1 stop3h 13mUnited Airlines
Deal found 12/10$304
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Mon 12/226:00 amONT - MRY
1 stop4h 29mUnited Airlines
Thu 12/2512:35 pmMRY - ONT
1 stop8h 32mUnited Airlines
Deal found 12/11$319
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Thu 12/116:41 pmONT - MRY
1 stop3h 18mUnited Airlines
Thu 12/182:30 pmMRY - ONT
1 stop3h 13mUnited Airlines
Deal found 12/11$339
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 12/116:00 amONT - MRY
1 stop4h 33mUnited Airlines
Sun 12/145:05 amMRY - ONT
1 stop7h 27mUnited Airlines
Deal found 12/10$349
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 12/255:05 amONT - MRY
1 stop8h 40mUnited Airlines
Mon 12/292:30 pmMRY - ONT
1 stop3h 13mUnited Airlines
Deal found 12/10$399
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Thu 12/186:00 amONT - MRY
1 stop4h 29mUnited Airlines
Sun 12/212:30 pmMRY - ONT
1 stop3h 13mUnited Airlines
Deal found 12/11$409
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/276:00 amONT - MRY
1 stop4h 29mUnited Airlines
Wed 12/312:30 pmMRY - ONT
1 stop19h 31mUnited Airlines
Deal found 12/11$453
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/246:00 amONT - MRY
1 stop4h 29mUnited Airlines
Sun 12/282:30 pmMRY - ONT
1 stop3h 13mUnited Airlines
Deal found 12/10$464
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/316:00 amONT - MRY
1 stop13h 25mAlaska Airlines
Thu 1/296:07 pmMRY - ONT
1 stop5h 49mAlaska Airlines
Deal found 12/10$478

Find 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$224
(Alaska Airlines)

One-way from

$119
(Kiwi.com)

Popular in

September

Cheapest in

July

Average price

$361
Provider with most accurate pricing for Ontario-Monterey Regional flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Monterey Regional flights.
Search Deals
From Ontario to Monterey Regional
Search Deals
One-way flight from Ontario to Monterey Regional
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($57 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 12, 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

Thu 1/22

6:00 am-5:30 pm

1 stop11h 30m

Monterey Regional

Mon 1/26

6:07 pm-3:08 pm

1 stop21h 01m

$224

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Thu 1/29

6:00 am-5:30 pm

1 stop11h 30m

Monterey Regional

Mon 2/2

6:07 pm-11:56 pm

1 stop5h 49m

$254

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Mon 1/26

6:00 am-5:30 pm

1 stop11h 30m

Monterey Regional

Fri 1/30

6:07 pm-3:08 pm

1 stop21h 01m

$254

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Tue 1/27

11:53 am-11:26 pm

2 stops11h 33m

Monterey Regional

Mon 2/2

6:07 pm-11:56 pm

1 stop5h 49m

$264

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Sat 1/31

1:24 pm-9:20 pm

1 stop7h 56m

Monterey Regional

Tue 2/3

5:00 am-12:47 pm

1 stop7h 47m

$279

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Wed 2/25

1:50 pm-5:20 pm

1 stop3h 30m

Monterey Regional

Sat 2/28

5:00 am-12:43 pm

1 stop7h 43m

$299

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Wed 3/11

1:40 pm-6:00 pm

1 stop4h 20m

Monterey Regional

Mon 3/30

6:50 pm-11:06 pm

1 stop4h 16m

$299

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Tue 3/10

6:14 am-11:43 pm

2 stops17h 29m

Monterey Regional

Tue 3/17

6:00 am-10:44 pm

2 stops16h 44m

$303

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Wed 12/24

6:00 am-10:29 am

1 stop4h 29m

Monterey Regional

Thu 1/1

2:30 pm-5:43 pm

1 stop3h 13m

$304

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Wed 3/18

6:00 am-1:35 pm

1 stop7h 35m

Monterey Regional

Mon 3/23

2:25 pm-10:38 pm

1 stop8h 13m

$304

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 22 results
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Compare providers for flights from Ontario to Monterey

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Monterey in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Monterey flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Monterey flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Monterey flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Monterey flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Monterey flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, February is the cheapest month in which you can book a flight from Ontario to Monterey (average of $18). Flying from Ontario to Monterey in November is currently the most expensive (average of $62). 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 December 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Monterey in the evening. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight at noon.

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 December 12, 2025.
Get a feel of what it's like to fly with United 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.
United Airlines
7.4
Good
9,095 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.
United Airlines
7.4
Good
9,095 reviews
United Airlines
7.4
Good
9,095 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.

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.

  • How long is the flight from Ontario to Monterey?

    For as low as $224, Alaska Airlines can have you in Monterey from Ontario in 11h 30m. Airlines will cover a distance of 296 mi.

  • What is the cheapest airline to fly from Ontario to Monterey round-trip?

    Cheapflights users have booked flights from Ontario to Monterey round-trip from $278. United Airlines is 28% 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, February is the cheapest month in which you can book a flight from Ontario to Monterey (average of $18). Flying from Ontario to Monterey in November is currently the most expensive (average of $62). 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.

See more FAQs

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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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$278Average$368FlexibilityNo cancel feeOn-time69%

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