MRY - ONT

$197 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 9/19. 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 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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Flights 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

Tue, Jul 15 - Sat, Jul 19
United Airlines Logo
2:14 pm - 5:43 pmMRY-ONT
3h 29m1 stop
United Airlines Logo
6:39 pm - 11:44 pmONT-MRY
5h 05m1 stop
$259United Airlines
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Mon, Jul 21 - Wed, Jul 30
United Airlines Logo
2:14 pm - 5:43 pmMRY-ONT
3h 29m1 stop
United Airlines Logo
6:39 pm - 11:44 pmONT-MRY
5h 05m1 stop
$279United Airlines
Find Deal
Thu, Aug 7 - Sun, Aug 10
United Airlines Logo
2:14 pm - 5:43 pmMRY-ONT
3h 29m1 stop
United Airlines Logo
6:10 am - 11:05 amONT-MRY
4h 55m1 stop
$344United Airlines
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Sat, Sep 20 - Sat, Sep 27
Alaska Airlines Logo
7:56 pm - 10:44 amMRY-ONT
14h 48m1 stop
Alaska Airlines Logo
11:39 am - 7:14 pmONT-MRY
7h 35m1 stop
$352Alaska Airlines
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Fri, Sep 19 - Sat, Sep 27
Alaska Airlines Logo
7:56 pm - 10:44 amMRY-ONT
14h 48m1 stop
Alaska Airlines Logo
6:00 am - 7:14 pmONT-MRY
13h 14m1 stop
$362Alaska Airlines
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Mon, Aug 25 - Fri, Aug 29
United Airlines Logo
2:20 pm - 5:37 pmMRY-ONT
3h 17m1 stop
United Airlines Logo
1:42 pm - 10:31 amONT-MRY
20h 49m1 stop
$363United Airlines
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Tue, Jul 22 - Tue, Jul 29
United Airlines Logo
2:14 pm - 5:43 pmMRY-ONT
3h 29m1 stop
United Airlines Logo
6:39 pm - 11:44 pmONT-MRY
5h 05m1 stop
$369United Airlines
Find Deal
Fri, Jul 25 - Mon, Jul 28
United Airlines Logo
5:00 am - 10:52 pmMRY-ONT
17h 52m1 stop
United Airlines Logo
6:39 pm - 11:44 pmONT-MRY
5h 05m1 stop
$372United Airlines
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Wed, Aug 27 - Sat, Aug 30
Alaska Airlines Logo
6:00 am - 5:00 pmMRY-ONT
11h 00m2 stops
Alaska Airlines Logo
7:10 am - 7:14 pmONT-MRY
12h 04m2 stops
$373Alaska Airlines
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Fri, Aug 22 - Mon, Aug 25
Logo
2:20 pm - 8:33 pmMRY-ONT
6h 13m1 stop
Logo
10:06 am - 7:14 pmONT-MRY
9h 08m2 stops
$576
Find Deal
Useful Info

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 ($259) and Alaska Airlines ($352).

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Good to know

Cheapest flight$197
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 $197 for a one-way ticket and $259 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?

    oneworld, and Star Alliance are the airline alliances operating flights between Monterey and Ontario, with oneworld being the most commonly used for this route.

  • 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 8858 reviews
7.0Entertainment
6.6Food
7.7Boarding
8.1Crew
7.3Comfort
Airline reviews

Boarded plane and then delayed 1.5 hours while on the plane

4.0 OkayJake, Jul 2025BIH - SFO
Read more United Airlines reviews

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

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

A bit rush for transit. Food and entertainment are not available

The gate was too far away for the connecting flight

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

Information on your arrival and departure airports

Monterey (MRY)
Ontario (ONT)

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