ONT - MRY

$182 Find Cheap Flights from Ontario to Monterey

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Monterey departing on 10/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Monterey

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Monterey, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Monterey, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Ontario to Monterey (ONT-MRY)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Monterey that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Monterey

Sat, Sep 27 - Wed, Oct 1
United Airlines Logo
6:51 pm - 9:38 pmONT-MRY
2h 47m1 stop
United Airlines Logo
6:15 am - 12:13 pmMRY-ONT
5h 58m1 stop
$219United Airlines
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Wed, Jul 30 - Wed, Aug 6
United Airlines Logo
6:39 pm - 11:44 pmONT-MRY
5h 05m1 stop
United Airlines Logo
2:14 pm - 5:43 pmMRY-ONT
3h 29m1 stop
$279United Airlines
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Sat, Aug 23 - Mon, Aug 25
United Airlines Logo
6:00 am - 10:31 amONT-MRY
4h 31m1 stop
United Airlines Logo
2:20 pm - 5:37 pmMRY-ONT
3h 17m1 stop
$280United Airlines
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Fri, Jul 18 - Wed, Jul 23
United Airlines Logo
6:39 pm - 11:44 pmONT-MRY
5h 05m1 stop
United Airlines Logo
2:14 pm - 5:43 pmMRY-ONT
3h 29m1 stop
$284United Airlines
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Mon, Aug 11 - Fri, Aug 22
United Airlines Logo
6:10 am - 11:05 amONT-MRY
4h 55m1 stop
United Airlines Logo
2:20 pm - 8:33 pmMRY-ONT
6h 13m1 stop
$314United Airlines
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Tue, Aug 5 - Sat, Aug 9
United Airlines Logo
6:39 pm - 11:44 pmONT-MRY
5h 05m1 stop
United Airlines Logo
2:14 pm - 5:58 pmMRY-ONT
3h 44m1 stop
$344United Airlines
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Sat, Aug 30 - Mon, Sep 1
United Airlines Logo
6:00 am - 10:31 amONT-MRY
4h 31m1 stop
United Airlines Logo
5:30 am - 12:13 pmMRY-ONT
6h 43m1 stop
$352United Airlines
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Thu, Aug 28 - Sun, Aug 31
United Airlines Logo
6:50 pm - 9:48 pmONT-MRY
2h 58m1 stop
United Airlines Logo
5:30 am - 5:37 pmMRY-ONT
12h 07m1 stop
$363United Airlines
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Wed, Aug 20 - Sat, Aug 23
Alaska Airlines Logo
6:00 am - 7:14 pmONT-MRY
13h 14m1 stop
Alaska Airlines Logo
7:51 pm - 10:44 amMRY-ONT
14h 53m1 stop
$373Alaska Airlines
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Sat, Oct 4 - Wed, Oct 8
Alaska Airlines Logo
7:10 am - 10:51 pmONT-MRY
15h 41m2 stops
Alaska Airlines Logo
6:00 am - 11:49 pmMRY-ONT
17h 49m2 stops
$388Alaska Airlines
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KAYAK's insights & trends for Ontario to Monterey flights

Get data-powered insights and trends into flights from Ontario to Monterey to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Ontario to Monterey?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Monterey, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Monterey is July, where tickets cost $278 (return) on average. On the other hand, the most expensive months are September and November, where the average cost of round-trip tickets is $579 and $573 respectively.

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Good to know

Low seasonFebruary
High seasonAugust
Cheapest flight$182
Best time to beat the crowds but there is an average 20% increase in price.
Most popular time to fly with an average 4% increase in price.
Flight from Ontario to Monterey

When to book flights from Ontario to Monterey

Are your dates flexible? Find out the best times to travel from Ontario to Monterey based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Monterey

  • What is the cheapest flight from Ontario to Monterey?

    In the last 3 days, the lowest price for a flight from Ontario to Monterey was $182 for a one-way ticket and $219 for a round-trip.

  • Do I need a passport to fly between Ontario and Monterey?

    A passport is not required to fly from Ontario to Monterey.

  • Which aircraft models fly most regularly from Ontario to Monterey?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Monterey?

    oneworld, and Star Alliance are the airline alliances operating flights between Ontario and Monterey, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Ontario to Monterey?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Monterey.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Monterey?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Monterey from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Monterey?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Monterey with an airline and back to Ontario with another airline. Booking your flights between Ontario and MRY can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Monterey?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Monterey from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Monterey

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Monterey. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Monterey? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8852 reviews
8.1Crew
7.0Entertainment
7.7Boarding
6.6Food
7.3Comfort
Airline reviews

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

2.0 MediocreWilliam, Jun 2025SFO - SAN
Read more United Airlines reviews

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

My flight was delayed a very short period of time but they did not hold my connecting flight to San Diego, also through United. So they closed the doors before we got off our plane. They would only have to help the door open for another five to ten minutes. So I missed a court deadline for a manditory mediation settlement conference for my client. I had to get an associate to be there in person and be on the phone with him relaying what he needs to do the entire time. The court was very upset with me and so was my client. United cannot be trusted.

We were given vouchers we couldn’t use with a 5.5 hour delay

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

A bit rush for transit. Food and entertainment are not available

The gate was too far away for the connecting flight

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

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

Information on your arrival and departure airports

Ontario (ONT)
Monterey (MRY)

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