ONT - MRY

$143 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 2/7. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$254
Overall average: $458
Alaska Airlines
Tue 3/24Mon 3/30
ONT - MRY • 1 stop
Cheapest one-way
$143
Alaska Airlines
Sat 2/7
ONT - MRY • 2 stops
Top airlines
United Airlines
Cheapest • from $272 (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 • 34% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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!
Flight Deals
Booking Insights
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

Tue, Mar 24 - Mon, Mar 30
Alaska Airlines Logo
7:08 pm - 5:18 pm
ONT
-
MRY
22h 10m1 stop
Alaska Airlines Logo
4:50 pm - 9:39 am
MRY
-
ONT
16h 49m1 stop
$254Alaska Airlines
Thu, Jan 29 - Fri, Jan 30
Alaska Airlines Logo
6:00 am - 5:30 pm
ONT
-
MRY
11h 30m1 stop
Alaska Airlines Logo
6:07 pm - 3:08 pm
MRY
-
ONT
21h 01m1 stop
$255Alaska Airlines
Wed, Mar 18 - Wed, Mar 25
United Airlines Logo
1:40 pm - 6:00 pm
ONT
-
MRY
4h 20m1 stop
United Airlines Logo
7:00 pm - 10:57 pm
MRY
-
ONT
3h 57m1 stop
$272United Airlines
Tue, Mar 24 - Mon, Mar 30
Alaska Airlines Logo
7:08 pm - 5:18 pm
ONT
-
MRY
22h 10m1 stop
Alaska Airlines Logo
4:50 pm - 9:39 am
MRY
-
ONT
16h 49m1 stop
$274Alaska Airlines
Sat, May 16 - Tue, May 19
Alaska Airlines Logo
6:00 am - 6:42 pm
ONT
-
MRY
12h 42m1 stop
Alaska Airlines Logo
7:19 pm - 3:09 pm
MRY
-
ONT
19h 50m1 stop
$283Alaska Airlines
Mon, Jan 26 - Fri, Jan 30
Multiple Airlines Logo
3:22 pm - 8:55 pm
ONT
-
MRY
5h 33m1 stop
Multiple Airlines Logo
9:45 pm - 1:34 pm
MRY
-
ONT
15h 49m1 stop
$292Multiple Airlines
Fri, Mar 6 - Mon, Mar 9
Alaska Airlines Logo
6:14 am - 6:36 pm
ONT
-
MRY
12h 22m1 stop
Alaska Airlines Logo
7:13 pm - 3:08 pm
MRY
-
ONT
19h 55m1 stop
$294Alaska Airlines
Wed, Feb 4 - Fri, Feb 6
Alaska Airlines Logo
11:53 am - 11:26 pm
ONT
-
MRY
11h 33m2 stops
Alaska Airlines Logo
6:07 pm - 11:56 pm
MRY
-
ONT
5h 49m1 stop
$295Alaska Airlines
Fri, Feb 13 - Tue, Feb 17
United Airlines Logo
1:50 pm - 5:20 pm
ONT
-
MRY
3h 30m1 stop
United Airlines Logo
6:40 am - 9:58 am
MRY
-
ONT
3h 18m1 stop
$299United Airlines
Thu, Jan 29 - Mon, Feb 2
United Airlines Logo
1:24 pm - 9:20 pm
ONT
-
MRY
7h 56m1 stop
United Airlines Logo
6:40 am - 11:18 am
MRY
-
ONT
4h 38m1 stop
$304United Airlines
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 January and September, where the average cost of round-trip tickets is $724 and $460 respectively.

Good to know

Low seasonMarch
Cheapest flight$143
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly and prices are also 35% 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 $143 for a one-way ticket and $254 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 9145 reviews
6.6Food
7.7Boarding
8.1Crew
7.1Entertainment
7.3Comfort
Airline reviews

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

4.0 OkayWalter, Jan 2026
CLE - SFO
Read more United Airlines reviews

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Flight was late - I was downgraded from first class to coach

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Flight was timely, relatively comfortable, with decent entertainment and food served. Only problem encountered was with the free messaging which I highly appreciate, but it did not work from iphone to non-iphones.

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.

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

Information on your arrival and departure airports