ONT - MRY

$165 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 7/3. 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$279
United Airlines
Sat 6/20Tue 6/23
ONT - MRY • 1 stop
Cheapest one-way
$165
Multiple Airlines
Fri 7/3
ONT - MRY • 1 stop
Top airlines
United Airlines
Cheapest • from $279 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Monterey. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
San Francisco (SFO)
Cheapest • Avg $444 (round-trip)
San Francisco (SFO)
Shortest trip • 4h 33m (one-way)
Insights
Insights
Insights
Insights
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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

Sat, Jun 20 - Tue, Jun 23
United Airlines Logo
6:00 am - 11:10 am
ONT
-
MRY
5h 10m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
MRY
-
ONT
4h 12m
1 stop
$279United Airlines
Fri, Jun 19 - Sun, Jun 21
United Airlines Logo
1:18 pm - 9:10 pm
ONT
-
MRY
7h 52m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
MRY
-
ONT
4h 12m
1 stop
$349United Airlines
Wed, Jul 29 - Mon, Aug 3
United Airlines Logo
6:00 am - 11:10 am
ONT
-
MRY
5h 10m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
MRY
-
ONT
4h 12m
1 stop
$363United Airlines
Sat, Jun 6 - Sun, Jun 14
United Airlines Logo
6:39 pm - 11:47 pm
ONT
-
MRY
5h 08m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
MRY
-
ONT
4h 12m
1 stop
$364United Airlines
Mon, Jul 27 - Tue, Aug 4
United Airlines Logo
6:00 am - 11:10 am
ONT
-
MRY
5h 10m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
MRY
-
ONT
4h 12m
1 stop
$383United Airlines
Mon, Aug 10 - Sat, Aug 15
United Airlines Logo
6:00 am - 11:10 am
ONT
-
MRY
5h 10m
1 stop
United Airlines Logo
3:36 pm - 8:01 pm
MRY
-
ONT
4h 25m
1 stop
$384United Airlines
Thu, Jun 4 - Mon, Jun 8
United Airlines Logo
6:39 pm - 11:47 pm
ONT
-
MRY
5h 08m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
MRY
-
ONT
4h 12m
1 stop
$389United Airlines
Wed, Jul 29 - Sun, Aug 2
United Airlines Logo
6:00 am - 11:10 am
ONT
-
MRY
5h 10m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
MRY
-
ONT
4h 12m
1 stop
$398United Airlines
Fri, Jun 5 - Tue, Jun 9
United Airlines Logo
6:39 pm - 11:47 pm
ONT
-
MRY
5h 08m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
MRY
-
ONT
4h 12m
1 stop
$399United Airlines
Sat, Jul 18 - Sun, Jul 19
United Airlines Logo
6:00 am - 11:10 am
ONT
-
MRY
5h 10m
1 stop
United Airlines Logo
8:00 am - 12:12 pm
MRY
-
ONT
4h 12m
1 stop
$419United 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.

Which airlines provide the cheapest flights from Ontario to Monterey?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 3 days.

In the past 3 days, the cheapest round-trip tickets from Ontario to Monterey were found on United Airlines ($279) and Alaska Airlines ($543).

Find deals

Good to know

Cheapest flight$165
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 $165 for a one-way ticket and $279 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 9747 reviews
7.1Entertainment
6.6Food
8.1Crew
7.3Comfort
7.7Boarding
Airline reviews

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.

2.0 MediocreAnonymous, May 2026
TPA - SFO
Read more United Airlines reviews

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?

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

No complaints other than luggage carousel was incorrectly guiding passengers to the wrong carousel on the screen.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

The flight was delayed from take off because only one runway was operational in San Francisco.

Several missed and almost missed connections. It felt like everything was being patched together last minute without enough resources and it ended up being an extremely stressful experience that basically ruined our weekend on the west coast. What a waste.

Packed in plane small uncomfortable seats elbow to elbow nobody wants to be in that situation for the money they paid

Checking in united could not figure out my star alliance gold. Baggage did not get marked priority and didn't receive boarding passes. When got to SFO lounge personal fixed everything Immediately

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

Information on your arrival and departure airports

Ontario (ONT)
Monterey (MRY)