ONT - MRY

$96 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 12/15. 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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Flight 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

Fri, Oct 31 - Sun, Nov 2
United Airlines Logo
6:38 pm - 9:58 pmONT-MRY
3h 20m1 stop
United Airlines Logo
7:50 am - 12:37 pmMRY-ONT
4h 47m1 stop
$219United Airlines
Find Deal
Fri, Oct 24 - Mon, Oct 27
Multiple Airlines Logo
6:05 am - 9:20 pmONT-MRY
15h 15m1 stop
Multiple Airlines Logo
9:19 pm - 8:42 pmMRY-ONT
23h 23m1 stop
$228Multiple Airlines
Find Deal
Fri, Nov 14 - Tue, Nov 18
Alaska Airlines Logo
6:11 pm - 10:37 amONT-MRY
16h 26m1 stop
Alaska Airlines Logo
11:14 am - 8:53 pmMRY-ONT
9h 39m1 stop
$245Alaska Airlines
Find Deal
Fri, Nov 7 - Fri, Nov 14
Multiple Airlines Logo
6:00 am - 3:29 pmONT-MRY
9h 29m1 stop
Multiple Airlines Logo
3:50 pm - 9:57 pmMRY-ONT
6h 07m1 stop
$247Multiple Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
Alaska Airlines Logo
4:11 pm - 11:37 amONT-MRY
19h 26m1 stop
Alaska Airlines Logo
11:14 am - 8:53 pmMRY-ONT
9h 39m1 stop
$263Alaska Airlines
Find Deal
Sat, Dec 13 - Tue, Dec 16
United Airlines Logo
6:41 pm - 9:59 pmONT-MRY
3h 18m1 stop
United Airlines Logo
7:00 am - 12:17 pmMRY-ONT
5h 17m1 stop
$270United Airlines
Find Deal
Thu, Feb 12 - Sun, Feb 15
United Airlines Logo
1:52 pm - 5:15 pmONT-MRY
3h 23m1 stop
United Airlines Logo
6:03 pm - 10:57 pmMRY-ONT
4h 54m1 stop
$279United Airlines
Find Deal
Fri, Oct 24 - Mon, Oct 27
Multiple Airlines Logo
6:05 am - 9:20 pmONT-MRY
15h 15m1 stop
Multiple Airlines Logo
9:19 pm - 11:50 pmMRY-ONT
26h 31m2 stops
$282Multiple Airlines
Find Deal
Fri, Dec 12 - Sun, Dec 14
Alaska Airlines Logo
7:33 pm - 10:46 amONT-MRY
15h 13m1 stop
Alaska Airlines Logo
11:23 am - 11:29 pmMRY-ONT
12h 06m1 stop
$285Alaska Airlines
Find Deal
Thu, Nov 13 - Sun, Nov 16
American Airlines Logo
12:55 pm - 10:25 pmONT-MRY
9h 30m1 stop
American Airlines Logo
7:13 pm - 9:01 amMRY-ONT
13h 48m1 stop
$477American Airlines
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $219 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
July
Cheapest • 30% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$219
Overall average: $339
United Airlines
Fri 10/31Sun 11/2
ONT - MRY • 1 stop
Cheapest one-way
$96
Multiple Airlines
Mon 12/15
ONT - MRY • 1 stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Monterey!
Booking Insights

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 February and November, where the average cost of round-trip tickets is $494 and $471 respectively.

Good to know

Low seasonFebruary
Cheapest flight$96
Best time to beat the crowds but there is an average 23% increase in price.
Most popular time to fly and prices are also 21% lower on average.
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 $96 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?

    Star Alliance is the only airline alliance operating flights between Ontario and Monterey.

  • 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 8968 reviews
7.3Comfort
6.6Food
7.1Entertainment
8.1Crew
7.7Boarding
Airline reviews

The internet service I paid for didn’t work at all and the flight crew was not very friendly.

6.0 GoodLucia, Oct 2025BNA - SFO
Read more United Airlines reviews

The internet service I paid for didn’t work at all and the flight crew was not very friendly.

Subject: Formal Complaint: Discriminatory and Unprofessional Conduct – Request for Immediate Action & Compensation Dear [Airline Customer Relations Team], I am writing to file a formal complaint regarding my recent travel experience with [Airline], which was by far the worst I have ever encountered. What occurred was not only unprofessional, but in several instances discriminatory, unsafe, and unacceptable. On the first leg of my trip, I arrived only four minutes past check-in. Instead of making any attempt to resolve the matter, your representative flatly denied me boarding and made me wait while she attended to passengers who arrived after me. By the time a manager intervened, it was too late to board, costing me time, money, and unnecessary frustration. The second leg of my trip (Chicago–San Francisco) raised even more serious concerns. From the outset, it was apparent that the staff—particularly two attendants—prioritized Caucasian passengers while dismissing African American and minority passengers. • When a Caucasian passenger in the exit row refused to comply with federal safety requirements, I, as a first responder, immediately offered to switch seats and assume the responsibility. My offer was blatantly ignored, and instead, a Caucasian passenger seated further up was chosen. This was discriminatory and deeply insulting, especially as I was actively de-escalating the situation that could have delayed the flight further. • During a lengthy tarmac delay of over 90 minutes, passengers were given conflicting and unreasonable instructions that created unnecessary distress and tension. • Throughout the flight, a visibly intoxicated passenger directly in front of me was disruptive, rude to others, failed to comply with seatbelt and electronic device rules, and yet faced no enforcement from the crew. In stark contrast, I was singled out for repeated compliance checks even though I was following every rule. This unequal treatment was so obvious that multiple passengers around me spoke up in my defense. This pattern of behavior demonstrated a clear lack of professionalism, disregard for passenger safety, and discriminatory treatment. I expect far better from an airline of your stature. As a paying customer subjected to this unacceptable treatment, I am formally requesting: 1. A full investigation into the conduct of the staff on both flights. 2. A written apology acknowledging the discriminatory and unprofessional behavior I endured. 3. Appropriate compensation for the distress, inconvenience, and mishandling of my travel. If this matter is not addressed promptly and thoroughly, I will have no choice but to escalate my complaint further, including filing with the U.S. Department of Transportation and sharing my experience through other channels. I trust [Airline] will take this complaint seriously and provide a timely resolution.

Check in was quick and easy during early hours. Flight was on time, and customer services was a plus.

The flight was comfortable with the exit row and great service

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

1. when we went to check in, our 2 first class seats had been CANCELED and the flight was sold out. This was done without our prior knowledge. It was all we could do to restore one first class seat for my wife and I flew economy. 2, Our flight home was scheduled to leave at 10:30 pm. Due to tsunami warnings, the roads were closed and our flight status was uncertain as to whether it would leave as scheduled. It was announced that it would now leave at 11:20 pm and the roads were now open since the tsunami had come and gone. We made a mad dash to the airport and checked in. Delays were announced at 12:30 pm, 1:30 am, 2:30 am and at 3:30 am it was canceled. Since this was a flight due to natural (tsunami) causes, there was no compensation. We were told to return at 1:00 pm the next day and our baggage would be kept on the plane since the same plane was going to leave at 1:00 pm. We had to return to our hotel for the rest of the night. The same plane did not leave at 1:00 pm and our baggage was gone! All in all, it was a miserable performance by UA. Information was hard to obtain and no one knew what was going on and what was going to happen. Hundreds of passengers slept on the floor, chairs, etc. No food and no water was made available to the passengers. It was a situation where UA could care less what was going on. As a one million mile flyer, I had not experienced anything like this before and it was hugely disappointing!

Boarded plane and then delayed 1.5 hours while on the plane

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

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

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