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Monterey

$207+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MRY
Aug 27 — Sep 31
Thu 8/27
Thu 9/3
1 adult, Economy
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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 July 28, 2026.

This United Airlines deal was found by Cheapflights users on 7/25. 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 8/246:00 am
ONT
-
MRY
1 stop4h 15m
United Airlines
Mon 8/313:36 pm
MRY
-
ONT
1 stop4h 25m
United Airlines
Deal found 7/25$289
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Tue 8/111:56 pm
ONT
-
MRY
1 stop3h 20m
United Airlines
Sat 8/153:36 pm
MRY
-
ONT
1 stop4h 25m
United Airlines
Deal found 7/27$319
This United Airlines deal was found by Cheapflights users on 7/25. 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 9/121:56 pm
ONT
-
MRY
1 stop3h 20m
United Airlines
Sun 9/133:36 pm
MRY
-
ONT
1 stop4h 25m
United Airlines
Deal found 7/25$352
This United Airlines deal was found by Cheapflights users on 7/26. 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 9/76:08 am
ONT
-
MRY
1 stop4h 07m
United Airlines
Mon 9/146:45 pm
MRY
-
ONT
1 stop4h 06m
United Airlines
Deal found 7/26$359
This United Airlines deal was found by Cheapflights users on 7/22. 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 8/101:18 pm
ONT
-
MRY
1 stop7h 52m
United Airlines
Sat 8/155:00 am
MRY
-
ONT
1 stop7h 50m
United Airlines
Deal found 7/22$374
This United Airlines deal was found by Cheapflights users on 7/25. 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 8/11:18 pm
ONT
-
MRY
1 stop7h 52m
United Airlines
Mon 8/316:45 pm
MRY
-
ONT
1 stop4h 14m
United Airlines
Deal found 7/25$384
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Fri 8/71:18 pm
ONT
-
MRY
1 stop7h 52m
United Airlines
Sun 8/95:00 am
MRY
-
ONT
1 stop7h 47m
United Airlines
Deal found 7/23$389
This United Airlines deal was found by Cheapflights users on 7/27. 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 8/206:08 am
ONT
-
MRY
1 stop4h 07m
United Airlines
Sun 8/238:36 am
MRY
-
ONT
1 stop3h 36m
United Airlines
Deal found 7/27$393
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Fri 9/251:52 pm
ONT
-
MRY
1 stop4h 28m
United Airlines
Mon 9/287:05 pm
MRY
-
ONT
1 stop3h 54m
United Airlines
Deal found 7/27$394
This United Airlines deal was found by Cheapflights users on 7/25. 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 8/56:39 pm
ONT
-
MRY
1 stop5h 08m
United Airlines
Sat 8/85:00 am
MRY
-
ONT
1 stop7h 47m
United Airlines
Deal found 7/25$399
This United Airlines deal was found by Cheapflights users on 7/24. 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 8/14:20 pm
ONT
-
MRY
1 stop5h 32m
United Airlines
Mon 8/35:00 am
MRY
-
ONT
1 stop7h 47m
United Airlines
Deal found 7/24$409
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Sun 7/261:18 pm
ONT
-
MRY
1 stop7h 52m
United Airlines
Sun 8/28:00 am
MRY
-
ONT
1 stop4h 12m
United Airlines
Deal found 7/25$419

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 July 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$289
(United Airlines)

One-way from

$207
(Kiwi.com)

Popular in

April

Cheapest in

November

Average price

$433
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. 14% potential increase in price ($84 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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 July 28, 2026.
Use the filters below to find and compare flights from Ontario to Monterey that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Tue 8/11

1:56 pm-5:16 pm

1 stop3h 20m

Monterey Regional

Sat 8/15

3:36 pm-8:01 pm

1 stop4h 25m

$319

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Mon 9/7

6:08 am-10:15 am

1 stop4h 07m

Monterey Regional

Thu 9/17

6:45 pm-10:51 pm

1 stop4h 06m

$359

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Thu 9/17

6:08 am-10:15 am

1 stop4h 07m

Monterey Regional

Mon 9/21

3:36 pm-8:01 pm

1 stop4h 25m

$374

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Fri 8/7

6:00 am-11:10 am

1 stop5h 10m

Monterey Regional

Tue 8/11

5:00 am-12:50 pm

1 stop7h 50m

$389
Quickest round-trip

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Thu 8/20

6:08 am-10:15 am

1 stop4h 07m

Monterey Regional

Sun 8/23

8:36 am-12:12 pm

1 stop3h 36m

$393

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Fri 9/25

1:52 pm-6:20 pm

1 stop4h 28m

Monterey Regional

Mon 9/28

3:31 pm-8:31 pm

1 stop5h 00m

$394

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Thu 8/6

6:39 pm-11:47 pm

1 stop5h 08m

Monterey Regional

Sun 8/9

5:00 am-12:47 pm

1 stop7h 47m

$399

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Fri 7/31

1:18 pm-9:10 pm

1 stop7h 52m

Monterey Regional

Sat 8/1

12:00 pm-3:29 pm

1 stop3h 29m

$409

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Wed 9/9

6:02 am-5:46 pm

1 stop11h 44m

Monterey Regional

Tue 9/15

6:23 pm-2:16 pm

1 stop19h 53m

$433

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Thu 8/13

6:08 am-10:15 am

1 stop4h 07m

Monterey Regional

Sat 8/15

3:36 pm-8:01 pm

1 stop4h 25m

$434

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Monterey flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

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 28, 2026.
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
10,041 reviews

Food

6.6

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

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
10,041 reviews
United Airlines
7.4
Good
10,041 reviews

Food

6.6

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

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 $319, United Airlines can have you in Monterey from Ontario in 3h 20m. 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 $264. United Airlines is 46% 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.

See more FAQs

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Alternative routes for Ontario to Monterey

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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 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$264Average$403FlexibilityNo cancel feeOn-time69%

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