HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Monterey

$157+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MRY
May 29 — Jun 51
Fri 5/29
Fri 6/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Monterey with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/134:39 pm
ONT
-
MRY
1 stop23h 40m
Multiple Airlines
Sun 5/175:09 pm
MRY
-
ONT
1 stop14h 40m
Multiple Airlines
Deal found 4/27$248
This United Airlines deal was found by Cheapflights users on 4/29. 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 5/236:39 pm
ONT
-
MRY
1 stop5h 08m
United Airlines
Tue 5/268:00 am
MRY
-
ONT
1 stop4h 12m
United Airlines
Deal found 4/29$279
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Fri 8/73:40 pm
ONT
-
MRY
1 stop5h 34m
Multiple Airlines
Fri 8/1410:04 pm
MRY
-
ONT
1 stop21h 49m
Multiple Airlines
Deal found 4/28$293
This United Airlines deal was found by Cheapflights users on 4/27. 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 8/76:00 am
ONT
-
MRY
1 stop5h 10m
United Airlines
Fri 8/146:45 pm
MRY
-
ONT
1 stop4h 13m
United Airlines
Deal found 4/27$294
This United Airlines deal was found by Cheapflights users on 4/26. 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.
Fri 5/296:39 pm
ONT
-
MRY
1 stop5h 08m
United Airlines
Sun 5/318:00 am
MRY
-
ONT
1 stop4h 12m
United Airlines
Deal found 4/26$341
This United Airlines deal was found by Cheapflights users on 4/28. 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 7/96:00 am
ONT
-
MRY
1 stop5h 10m
United Airlines
Mon 7/138:00 am
MRY
-
ONT
1 stop4h 12m
United Airlines
Deal found 4/28$349
This United Airlines deal was found by Cheapflights users on 4/27. 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 5/266:00 am
ONT
-
MRY
1 stop5h 10m
United Airlines
Sat 5/308:00 am
MRY
-
ONT
1 stop4h 12m
United Airlines
Deal found 4/27$364
This United Airlines deal was found by Cheapflights users on 4/24. 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.
Mon 8/106:00 am
ONT
-
MRY
1 stop5h 10m
United Airlines
Sat 8/158:36 am
MRY
-
ONT
1 stop3h 36m
United Airlines
Deal found 4/24$369
This United Airlines deal was found by Cheapflights users on 4/27. 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 5/156:59 pm
ONT
-
MRY
1 stop3h 24m
United Airlines
Mon 5/1812:05 pm
MRY
-
ONT
1 stop5h 47m
United Airlines
Deal found 4/27$379
This United Airlines deal was found by Cheapflights users on 4/28. 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 5/206:00 am
ONT
-
MRY
1 stop5h 16m
United Airlines
Sat 5/235:00 am
MRY
-
ONT
1 stop7h 38m
United Airlines
Deal found 4/28$384

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 April 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$248
(Kiwi.com)

One-way from

$157
(Trip.com)

Popular in

September

Cheapest in

July

Average price

$318
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. 13% potential increase in price ($57 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 29, 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 5/26

6:00 am-11:10 am

1 stop5h 10m

Monterey Regional

Sat 5/30

8:00 am-12:12 pm

1 stop4h 12m

$364

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Fri 9/4

6:00 am-10:15 am

1 stop4h 15m

Monterey Regional

Sun 9/6

8:36 am-12:12 pm

1 stop3h 36m

$369

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Mon 8/10

6:00 am-11:10 am

1 stop5h 10m

Monterey Regional

Sat 8/15

8:36 am-12:12 pm

1 stop3h 36m

$369

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Sat 5/23

6:39 pm-11:47 pm

1 stop5h 08m

Monterey Regional

Mon 5/25

5:00 am-12:47 pm

1 stop7h 47m

$384

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Sat 6/27

6:00 am-11:10 am

1 stop5h 10m

Monterey Regional

Sun 6/28

8:00 am-12:12 pm

1 stop4h 12m

$424

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Thu 5/21

6:00 am-11:10 am

1 stop5h 10m

Monterey Regional

Sun 5/24

8:00 am-12:12 pm

1 stop4h 12m

$425

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Fri 5/15

6:00 am-11:16 am

1 stop5h 16m

Monterey Regional

Mon 5/18

12:05 pm-5:52 pm

1 stop5h 47m

$436

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Sun 7/19

6:00 am-11:10 am

1 stop5h 10m

Monterey Regional

Wed 7/22

8:00 am-12:12 pm

1 stop4h 12m

$457
Quickest round-trip

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Wed 5/13

6:59 pm-10:23 pm

1 stop3h 24m

Monterey Regional

Fri 5/22

8:00 am-12:12 pm

1 stop4h 12m

$463

OntarioMonterey

ONT - MRY

ONTMRY

Ontario

Wed 5/13

6:00 am-11:16 am

1 stop5h 16m

Monterey Regional

Sat 5/16

12:05 pm-5:52 pm

1 stop5h 47m

$464

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 22 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 April.
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.

Cheapflights Insights

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

How much does it cost to fly round-trip from Ontario to Monterey?

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 April 29, 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
9,680 reviews

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

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
9,680 reviews
United Airlines
7.4
Good
9,680 reviews

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

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 $369, United Airlines can have you in Monterey from Ontario in 4h 15m. 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 26% 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Monterey

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Las Vegas flights
San Francisco to Los Angeles flights
Los Angeles to Las Vegas flights
Los Angeles to San Francisco flights
San Francisco to Santa Ana flights
Burbank to Las Vegas flights
Ontario to San Francisco flights
Santa Ana to Las Vegas flights
San Jose to Las Vegas flights
San Francisco to San Diego flights
San Francisco to Ontario flights
Santa Ana to San Francisco flights
San Diego to Las Vegas flights
San Jose to Los Angeles flights
Ontario to Las Vegas flights
Sacramento to Las Vegas flights
Los Angeles to Sacramento flights
Los Angeles to San Jose flights
Sacramento to Los Angeles flights
Oakland to Las Vegas flights
San Diego to San Francisco flights
San Jose to San Diego flights
Fresno to Las Vegas flights
Burbank to San Francisco flights
Las Vegas to San Francisco flights
San Francisco to Palm Springs flights
San Diego to San Jose flights
Las Vegas to Los Angeles flights
San Jose to Ontario flights
Sacramento to San Diego flights
Las Vegas to Santa Ana flights
Stockton to Las Vegas flights
Ontario to Sacramento flights
San Francisco to Burbank flights
Reno to Las Vegas flights
Los Angeles to Reno flights
San Diego to Sacramento flights
Oakland to San Diego flights
Santa Rosa to Las Vegas flights
Las Vegas to Ontario flights
Las Vegas to Burbank flights
San Francisco to Long Beach flights
Sacramento to Ontario flights
Oakland to Los Angeles flights
Long Beach to Las Vegas flights
Sacramento to Santa Ana flights
Santa Ana to Sacramento flights
San Jose to Santa Ana flights
Santa Ana to Oakland flights
Las Vegas to San Diego flights

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 April 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$278Average$392FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.