ONT - MRY

$97 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 6/30. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$167
Typical prices: $469-$278
Multiple Airlines
Tue 7/7Fri 7/10
ONT - MRY • 1 stop
Cheapest one-way
$97
Multiple Airlines
Tue 6/30
ONT - MRY • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Ontario and Monterey. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $475 (round-trip)
Shortest trip • 4h 23m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
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, Jul 7 - Fri, Jul 10
Multiple Airlines Logo
3:40 pm - 1:34 pm
ONT
-
MRY
21h 54m
1 stop
Multiple Airlines Logo
10:00 pm - 3:14 pm
MRY
-
ONT
17h 14m
1 stop
$167Multiple Airlines
Fri, Jul 3 - Fri, Jul 10
Multiple Airlines Logo
3:34 pm - 9:10 pm
ONT
-
MRY
5h 36m
1 stop
Multiple Airlines Logo
10:00 pm - 3:14 pm
MRY
-
ONT
17h 14m
1 stop
$171Multiple Airlines
Tue, Jul 7 - Mon, Jul 13
Multiple Airlines Logo
3:40 pm - 1:34 pm
ONT
-
MRY
21h 54m
1 stop
Multiple Airlines Logo
10:00 pm - 8:03 am
MRY
-
ONT
10h 03m
1 stop
$189Multiple Airlines
Fri, Jul 3 - Mon, Jul 13
Multiple Airlines Logo
3:34 pm - 9:10 pm
ONT
-
MRY
5h 36m
1 stop
Multiple Airlines Logo
10:00 pm - 8:03 am
MRY
-
ONT
10h 03m
1 stop
$192Multiple Airlines
Tue, Jul 7 - Fri, Jul 10
Multiple Airlines Logo
8:58 am - 1:34 pm
ONT
-
MRY
28h 36m
2 stops
Multiple Airlines Logo
10:00 pm - 8:03 am
MRY
-
ONT
10h 03m
1 stop
$258Multiple Airlines
Fri, Jul 3 - Wed, Jul 8
Multiple Airlines Logo
3:34 pm - 9:10 pm
ONT
-
MRY
5h 36m
1 stop
Multiple Airlines Logo
2:24 pm - 3:54 pm
MRY
-
ONT
25h 30m
1 stop
$259Multiple Airlines
Sat, Jul 18 - Wed, Jul 22
United Airlines Logo
4:20 pm - 9:52 pm
ONT
-
MRY
5h 32m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
MRY
-
ONT
4h 12m
1 stop
$279United Airlines
Fri, Jul 3 - Wed, Jul 8
Multiple Airlines Logo
3:34 pm - 9:10 pm
ONT
-
MRY
5h 36m
1 stop
Multiple Airlines Logo
2:24 pm - 11:07 am
MRY
-
ONT
20h 43m
2 stops
$295Multiple Airlines
Sat, Jul 18 - Sun, Jul 19
United Airlines Logo
4:20 pm - 9:52 pm
ONT
-
MRY
5h 32m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
MRY
-
ONT
4h 12m
1 stop
$329United Airlines
Wed, Oct 21 - Sat, Oct 24
United Airlines Logo
1:52 pm - 6:20 pm
ONT
-
MRY
4h 28m
1 stop
United Airlines Logo
11:59 am - 5:46 pm
MRY
-
ONT
5h 47m
1 stop
$349United 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 January, where tickets cost $0 (return) on average. On the other hand, the most expensive months are April and June, where the average cost of round-trip tickets is $836 and $766 respectively.

Good to know

Low seasonJuly
Cheapest flight$97
Best time to beat the crowds with an average 41% drop in price.
Most popular time to fly and prices are also 41% 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 5 days, the lowest price for a flight from Ontario to Monterey was $97 for a one-way ticket and $167 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 9831 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
8.1Crew
6.6Food
Airline reviews

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

4.0 OkayOlivia, Jun 2026
SEA - SFO
Read more United Airlines reviews

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

Service was professional and quick. Premium economy seat was comfortable given the class

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

The staff was extremely helpful and friendly at all times! They went above and beyond to get us into an earlier flight in San Diego to make our connection in SFO possible, because our original flight did actually not make it! I did so much appreciate the UA team and how they made this possible. We also didn’t have seats together on the long flight to Singapore, but they found us seats together last moment with no additional cost! Nobody sat next to us, so that we were able to sleep! Thanks to UA for improving their service and Underpricer for booking this trip! Please be careful: 1,5 hrs for transfer in San Francisco might not be enough time in the future

Packed flight, which makes it tough on crew and boarding staff (and the customers of course). But this was great boarding, clear instructions, etc. Traveling on the weekends are always fraught with danger as you have families and less frequent flyers thus more confusion. But this flight went as planned.

Destroyed my suitcase. Tired of talking about it. Cancelling my unite mileage plus account.

New plane was lovely. Crew customer service is always lax but expected. Kraft on time and arrived safely.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

6 1/2 hours from Tampa to SFO on a Boeing 737. Cramped. No Service. No real food. One pass for coffee at the beginning and a second pass THREE hours later. And check-in in Tampa was nasty even by United standards. And I am at almost TWO million miles on United. It's a non-stop. But terrible service.

First class ticket gets you no seat back entertainment? I have to bring my own laptop to see a movie? And most of their movies have ADS? No thank you. Worse: Tiny snacks only on a 2 hr flight?

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

Information on your arrival and departure airports