MRY - ONT

$118 Find Cheap Flights from Monterey to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Monterey to Ontario departing on 2/6. 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 Ontario

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

Cheapest round-trip
$225
Alaska Airlines
Fri 1/30Sun 2/1
MRY - ONT • 1 stop
Cheapest one-way
$118
Alaska Airlines
Fri 2/6
MRY - ONT • 1 stop
Top airlines
United Airlines
Cheapest • from $244 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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 Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Monterey to Ontario (MRY-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Monterey to Ontario 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 Monterey to Ontario

Fri, Jan 30 - Sun, Feb 1
Alaska Airlines Logo
6:07 pm - 3:08 pm
MRY
-
ONT
21h 01m1 stop
Alaska Airlines Logo
6:00 am - 5:30 pm
ONT
-
MRY
11h 30m1 stop
$225Alaska Airlines
Sat, Jan 24 - Wed, Jan 28
United Airlines Logo
6:40 am - 12:17 pm
MRY
-
ONT
5h 37m1 stop
United Airlines Logo
1:53 pm - 7:19 pm
ONT
-
MRY
5h 26m1 stop
$244United Airlines
Tue, Mar 24 - Tue, Mar 31
Alaska Airlines Logo
5:55 pm - 11:59 pm
MRY
-
ONT
6h 04m1 stop
Alaska Airlines Logo
7:08 pm - 4:13 pm
ONT
-
MRY
21h 05m1 stop
$245Alaska Airlines
Wed, Jan 21 - Sun, Jan 25
United Airlines Logo
6:30 am - 11:18 am
MRY
-
ONT
4h 48m1 stop
United Airlines Logo
1:53 pm - 7:19 pm
ONT
-
MRY
5h 26m1 stop
$249United Airlines
Thu, Feb 5 - Tue, Feb 10
Alaska Airlines Logo
6:07 pm - 11:56 pm
MRY
-
ONT
5h 49m1 stop
Alaska Airlines Logo
11:53 am - 11:26 pm
ONT
-
MRY
11h 33m2 stops
$254Alaska Airlines
Mon, Mar 23 - Tue, Mar 31
Alaska Airlines Logo
5:55 pm - 9:39 am
MRY
-
ONT
15h 44m1 stop
Alaska Airlines Logo
6:00 am - 4:13 pm
ONT
-
MRY
10h 13m1 stop
$264Alaska Airlines
Thu, Feb 26 - Sun, Mar 1
United Airlines Logo
6:40 am - 12:38 pm
MRY
-
ONT
5h 58m1 stop
United Airlines Logo
1:50 pm - 5:20 pm
ONT
-
MRY
3h 30m1 stop
$267United Airlines
Fri, Jan 30 - Mon, Feb 2
Alaska Airlines Logo
6:07 pm - 3:08 pm
MRY
-
ONT
21h 01m1 stop
Alaska Airlines Logo
6:00 am - 11:26 pm
ONT
-
MRY
17h 26m2 stops
$274Alaska Airlines
Mon, Mar 23 - Wed, Apr 1
Alaska Airlines Logo
5:55 pm - 9:39 am
MRY
-
ONT
15h 44m1 stop
Alaska Airlines Logo
6:00 am - 4:13 pm
ONT
-
MRY
10h 13m1 stop
$283Alaska Airlines
Thu, Mar 19 - Sat, Mar 21
Alaska Airlines Logo
5:55 pm - 11:59 pm
MRY
-
ONT
6h 04m1 stop
Alaska Airlines Logo
6:00 am - 5:18 pm
ONT
-
MRY
11h 18m1 stop
$284Alaska Airlines
Booking Insights

KAYAK's insights & trends for Monterey to Ontario flights

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

Which airlines provide the cheapest flights from Monterey to Ontario?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Monterey to Ontario were found on United Airlines ($244) and Alaska Airlines ($245).

Which airlines fly non-stop between Monterey and Ontario?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Monterey to Ontario.

There is just one airline that flies from Monterey to Ontario direct and that is United Airlines. The best round-trip deal found from United Airlines for the route is $218.

Good to know

Cheapest flight$118
Flight from Monterey to Ontario

When to book flights from Monterey to Ontario

Are your dates flexible? Find out the best times to travel from Monterey to Ontario 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 Monterey to Ontario

  • What is the cheapest flight from Monterey to Ontario?

    In the last 3 days, the lowest price for a flight from Monterey to Ontario was $109 for a one-way ticket and $225 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Monterey to Ontario?

    Monterey and Ontario are both served by 1 main airport. You will leave Monterey from Monterey Regional and will be arriving at Ontario.

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

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

  • Which airline alliances offer flights from Monterey to Ontario?

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

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

    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 Monterey to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Monterey 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 Monterey to Ontario?

    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 Ontario with an airline and back to Monterey with another airline. Booking your flights between Monterey and ONT 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 Monterey to Ontario?

    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 Ontario from Monterey 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 Monterey to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Monterey to Ontario. 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 Monterey to Ontario? 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 9139 reviews
7.3Comfort
8.1Crew
6.6Food
7.7Boarding
7.1Entertainment
Airline reviews

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

2.0 MediocreGray, Dec 2025
IAH - SMF
Read more United Airlines reviews

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.

The flight was comfortable with the exit row and great service

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

Information on your arrival and departure airports