What is the cheapest airline that flies from Ontario to Monterey Regional?

United Airlines is the most popular carrier operating from Ontario to Monterey Regional

What airlines fly to Monterey?

United Airlines, Southwest and Frontier are the top three most popular airlines that fly to Monterey from Ontario according to our data. United Airlines is the first choice among our users, with 30% of people opting to fly with this airline when traveling to Monterey. Keep in mind that there are 11 different airlines that fly to Monterey on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario Airport to Monterey Regional Airport?

Prices for flights from Ontario Airport to Monterey Regional Airport are updated daily.

How many operators does momondo search for flights from Ontario Airport to Monterey Regional Airport?

As of September 2026, there is 1 operator available to choose from for flights from Ontario Airport to Monterey Regional Airport.

How old do you have to be to fly from Ontario Airport to Monterey Regional Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Monterey Regional Airport.

What documentation or ID do you need to fly to Monterey Regional Airport?

The travel and health documents you'll need for your trip to Monterey Regional Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Monterey Regional Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$126 Cheap Flights from Ontario to Monterey in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to San Francisco

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:03 am - 11:18 amONT Ontario-MRY Monterey Regional

3h 15m1 stop San Francisco

11:59 am - 5:46 pmMRY Monterey Regional-ONT Ontario

5h 47m1 stop San Francisco

$289United Airlines

Sat, Oct 3 - Sat, Oct 10

6:08 am - 10:15 amONT Ontario-MRY Monterey Regional

4h 07m1 stop San Francisco

6:45 pm - 10:51 pmMRY Monterey Regional-ONT Ontario

4h 06m1 stop San Francisco

$319United Airlines

Thu, Sep 17 - Mon, Sep 21

6:08 am - 11:20 amONT Ontario-MRY Monterey Regional

5h 12m1 stop San Francisco

12:21 pm - 6:11 pmMRY Monterey Regional-ONT Ontario

5h 50m1 stop San Francisco

$319United Airlines

Wed, Sep 16 - Sat, Sep 19

1:56 pm - 5:16 pmONT Ontario-MRY Monterey Regional

3h 20m1 stop San Francisco

3:36 pm - 8:01 pmMRY Monterey Regional-ONT Ontario

4h 25m1 stop San Francisco

$319United Airlines

Sat, Sep 19 - Sun, Sep 20

1:56 pm - 5:16 pmONT Ontario-MRY Monterey Regional

3h 20m1 stop San Francisco

12:21 pm - 6:11 pmMRY Monterey Regional-ONT Ontario

5h 50m1 stop San Francisco

$319United Airlines

Tue, Sep 15 - Sat, Sep 19

6:08 am - 10:15 amONT Ontario-MRY Monterey Regional

4h 07m1 stop San Francisco

3:36 pm - 8:01 pmMRY Monterey Regional-ONT Ontario

4h 25m1 stop San Francisco

$356United Airlines

Fri, Sep 18 - Sun, Sep 20

8:03 am - 1:06 pmONT Ontario-MRY Monterey Regional

5h 03m1 stop San Francisco

3:31 pm - 8:31 pmMRY Monterey Regional-ONT Ontario

5h 00m1 stop San Francisco

$359United Airlines

Sat, Oct 17 - Sun, Oct 18

1:35 pm - 7:19 pmONT Ontario-MRY Monterey Regional

5h 44m1 stop San Francisco

2:25 pm - 8:15 pmMRY Monterey Regional-ONT Ontario

5h 50m1 stop San Francisco

$359United Airlines

Thu, Nov 12 - Mon, Nov 16

5:59 pm - 4:06 pmONT Ontario-MRY Monterey Regional

22h 07m2 stops Portland Seattle/Tacoma Intl

4:48 pm - 11:18 amMRY Monterey Regional-ONT Ontario

18h 30m1 stop Seattle/Tacoma Intl

$609Alaska Airlines

Thu, Nov 12 - Mon, Nov 16

1:30 pm - 9:27 amONT Ontario-MRY Monterey Regional

19h 57m1 stop Phoenix Sky Harbor Intl

12:49 pm - 8:35 amMRY Monterey Regional-ONT Ontario

19h 46m1 stop Phoenix Sky Harbor Intl

$621American Airlines

Thu, Nov 26 - Sun, Nov 29

Cheap last minute flights

Enter your travel dates to find the best prices.

6:08 am - 10:15 amONT Ontario-MRY Monterey Regional

4h 07m1 stop San Francisco

3:38 pm - 8:01 pmMRY Monterey Regional-ONT Ontario

4h 23m1 stop San Francisco

$339United Airlines

Thu, Sep 10 - Sat, Sep 12

1:56 pm - 5:16 pmONT Ontario-MRY Monterey Regional

3h 20m1 stop San Francisco

3:38 pm - 8:01 pmMRY Monterey Regional-ONT Ontario

4h 23m1 stop San Francisco

$359United Airlines

Sat, Sep 5 - Tue, Sep 8

9:01 am - 1:06 pmONT Ontario-MRY Monterey Regional

4h 05m1 stop San Francisco

3:38 pm - 8:01 pmMRY Monterey Regional-ONT Ontario

4h 23m1 stop San Francisco

$371United Airlines

Tue, Sep 8 - Sat, Sep 12

1:56 pm - 5:16 pmONT Ontario-MRY Monterey Regional

3h 20m1 stop San Francisco

12:21 pm - 6:11 pmMRY Monterey Regional-ONT Ontario

5h 50m1 stop San Francisco

$375United Airlines

Tue, Sep 8 - Sat, Sep 12

9:01 am - 1:06 pmONT Ontario-MRY Monterey Regional

4h 05m1 stop San Francisco

5:00 am - 12:50 pmMRY Monterey Regional-ONT Ontario

7h 50m1 stop Denver Intl

$399United Airlines

Tue, Sep 8 - Tue, Sep 15

1:18 pm - 9:10 pmONT Ontario-MRY Monterey Regional

7h 52m1 stop Denver Intl

6:45 pm - 10:51 pmMRY Monterey Regional-ONT Ontario

4h 06m1 stop San Francisco

$399United Airlines

Thu, Sep 10 - Mon, Sep 14

6:08 am - 10:15 amONT Ontario-MRY Monterey Regional

4h 07m1 stop San Francisco

12:21 pm - 6:11 pmMRY Monterey Regional-ONT Ontario

5h 50m1 stop San Francisco

$409United Airlines

Thu, Sep 10 - Sun, Sep 13

6:08 am - 10:15 amONT Ontario-MRY Monterey Regional

4h 07m1 stop San Francisco

3:36 pm - 8:01 pmMRY Monterey Regional-ONT Ontario

4h 25m1 stop San Francisco

$409United Airlines

Thu, Sep 10 - Sun, Sep 13

7:12 am - 5:46 pmONT Ontario-MRY Monterey Regional

10h 34m2 stops Portland Seattle/Tacoma Intl

6:23 pm - 2:16 pmMRY Monterey Regional-ONT Ontario

19h 53m1 stop Seattle/Tacoma Intl

$992Alaska Airlines

Thu, Sep 10 - Mon, Sep 14

7:12 am - 5:46 pmONT Ontario-MRY Monterey Regional

10h 34m2 stops Portland Seattle/Tacoma Intl

6:23 pm - 2:16 pmMRY Monterey Regional-ONT Ontario

19h 53m1 stop Seattle/Tacoma Intl

$1,012Alaska Airlines

Wed, Sep 9 - Fri, Sep 11

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Alaska Airlines flights from Ontario to Monterey

Our best Alaska Airlines deals on Ontario to Monterey flight tickets

Alaska Airlines

Nov 12

ONT5:59 pmOntario

22h 07m

2 stops

MRY4:06 pmMonterey Regional

Nov 16

MRY4:48 pmMonterey Regional

18h 30m

1 stop

ONT11:18 amOntario

$609

Alaska Airlines

Nov 12

ONT7:15 amOntario

8h 51m

2 stops

MRY4:06 pmMonterey Regional

Nov 16

MRY4:48 pmMonterey Regional

18h 30m

1 stop

ONT11:18 amOntario

$629

Alaska Airlines

Oct 3

ONT6:02 amOntario

10h 49m

1 stop

MRY4:51 pmMonterey Regional

Oct 10

MRY6:03 amMonterey Regional

14h 12m

2 stops

ONT8:15 pmOntario

$630

United Airlines flights from Ontario to Monterey

Our best United Airlines deals on Ontario to Monterey flight tickets

United Airlines

Oct 3

ONT8:03 amOntario

3h 15m

1 stop

MRY11:18 amMonterey Regional

Oct 10

MRY11:59 amMonterey Regional

5h 47m

1 stop

ONT5:46 pmOntario

$289

United Airlines

Sep 15

ONT1:56 pmOntario

3h 20m

1 stop

MRY5:16 pmMonterey Regional

Sep 19

MRY12:21 pmMonterey Regional

5h 50m

1 stop

ONT6:11 pmOntario

$319

United Airlines

Sep 11

ONT6:08 amOntario

4h 07m

1 stop

MRY10:15 amMonterey Regional

Sep 13

MRY6:45 pmMonterey Regional

4h 06m

1 stop

ONT10:51 pmOntario

$329

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioMonterey

ONT Ontario - MRY Monterey Regional

ONTMRY

Ontario

Sat 10/3

8:03 am-11:18 am

1 stop3h 15m

Monterey Regional

Sat 10/10

11:59 am-5:46 pm

1 stop5h 47m

$289

OntarioMonterey

ONT Ontario - MRY Monterey Regional

ONTMRY

Ontario

Thu 9/17

6:08 am-10:15 am

1 stop4h 07m

Monterey Regional

Mon 9/21

6:45 pm-10:51 pm

1 stop4h 06m

$319

OntarioMonterey

ONT Ontario - MRY Monterey Regional

ONTMRY

Ontario

Wed 9/16

6:08 am-11:20 am

1 stop5h 12m

Monterey Regional

Sat 9/19

12:21 pm-6:11 pm

1 stop5h 50m

$319

Quickest round-trip

OntarioMonterey

ONT Ontario - MRY Monterey Regional

ONTMRY

Ontario

Sat 9/19

1:56 pm-5:16 pm

1 stop3h 20m

Monterey Regional

Sun 9/20

3:36 pm-8:01 pm

1 stop4h 25m

$319

OntarioMonterey

ONT Ontario - MRY Monterey Regional

ONTMRY

Ontario

Tue 9/15

1:56 pm-5:16 pm

1 stop3h 20m

Monterey Regional

Sat 9/19

12:21 pm-6:11 pm

1 stop5h 50m

$319

OntarioMonterey

ONT Ontario - MRY Monterey Regional

ONTMRY

Ontario

Fri 9/18

6:08 am-10:15 am

1 stop4h 07m

Monterey Regional

Sun 9/20

3:36 pm-8:01 pm

1 stop4h 25m

$356

OntarioMonterey

ONT Ontario - MRY Monterey Regional

ONTMRY

Ontario

Sat 10/17

8:03 am-1:06 pm

1 stop5h 03m

Monterey Regional

Sun 10/18

3:31 pm-8:31 pm

1 stop5h 00m

$359

OntarioMonterey

ONT Ontario - MRY Monterey Regional

ONTMRY

Ontario

Thu 11/12

1:35 pm-7:19 pm

1 stop5h 44m

Monterey Regional

Mon 11/16

2:25 pm-8:15 pm

1 stop5h 50m

$359

OntarioMonterey

ONT Ontario - MRY Monterey Regional

ONTMRY

Ontario

Thu 11/12

5:59 pm-4:06 pm

2 stops22h 07m

Monterey Regional

Mon 11/16

4:48 pm-11:18 am

1 stop18h 30m

$609

OntarioMonterey

ONT Ontario - MRY Monterey Regional

ONTMRY

Ontario

Thu 11/26

1:30 pm-9:27 am

1 stop19h 57m

Monterey Regional

Sun 11/29

12:49 pm-8:35 am

1 stop19h 46m

$621

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Monterey

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between Ontario and Monterey?

Prices are currently typical for flights on this route.

Typical prices usually range from $285 to $403.
The lowest price recently found on this route was $289.

What is the cheapest month to fly to Monterey?

The month of March is, on average, the cheapest month to fly to Monterey from Ontario, with most prices found around $0. If you’re not able to fly to Monterey in March, then January is your next best option. Flight prices from Ontario to Monterey during January average around $0.

What is the cheapest day to depart on your flight to Monterey?

The cheapest day to depart from Ontario to Monterey is on a Saturday. Travelers who choose to depart for Monterey on a Saturday will often find tickets for as low as $301. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Monterey for around $472.

What is the cheapest time of day to depart on your flight to Monterey?

According to our data, the cheapest time of day to fly to Monterey is in the evening. momondo users have found flights departing from Ontario to Monterey in the evening for as low as $299. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $363.

When to book flights from Ontario to Monterey

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Monterey according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Ontario to Monterey (ONT to MRY) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Monterey

Best Price Found	$126
Fastest flight time	2h 57m
Direct flights	None

The best one-way flight to Monterey from Ontario in the past 72 hours is $126. The best round-trip flight deal from Ontario to Monterey found on momondo in the last 72 hours is $289.

The fastest flight from Ontario to Monterey takes 2h 57m

There are no direct flights from Ontario to Monterey. There are no popular flight routes from Ontario to Monterey.

Search flight deals

Frequently asked questions about flying from Ontario to Monterey

How far is Ontario to Monterey Regional by plane?
There are 296.3 mi between Ontario and Monterey Regional. Flights usually cover this in 2h 57m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Ontario Airport to Monterey Regional Airport?
Prices for flights from Ontario Airport to Monterey Regional Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Monterey Regional Airport?
As of September 2026, there is 1 operator available to choose from for flights from Ontario Airport to Monterey Regional Airport.
How old do you have to be to fly from Ontario Airport to Monterey Regional Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Monterey Regional Airport.
What documentation or ID do you need to fly to Monterey Regional Airport?
The travel and health documents you'll need for your trip to Monterey Regional Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Monterey Regional Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Ontario to Monterey?
Based on momondo bookings for flights between Ontario and Monterey, the leading airline is United Airlines, making up 100% of the total bookings.

Best airlines flying from Ontario to Monterey

Compare and see reviews for airlines that fly from Ontario to Monterey with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $264	Free Cancellation	Rating 7.4 10,169 reviews		Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Monterey?

Finding the right flight to Monterey from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Monterey quick and easy, saving you time and money.

Can I find flights from Ontario to Monterey with flexible booking policies on momondo?

momondo does allow users to show only those flights to Monterey from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Monterey?

Once all potential Ontario to Monterey flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Monterey right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Monterey flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Monterey trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Sun 10/4

Sun 10/11

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Nearby airports

Airlines

Cabin classes

Other United States destinations

Other flights from Ontario

Complete your trip

Feeling lucky

Cheap flights from Ontario to San Francisco from $126

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to San Francisco departing on 10/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Ontario to San Francisco

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Alaska Airlines flights from Ontario to Monterey

Our best Alaska Airlines deals on Ontario to Monterey flight tickets

United Airlines flights from Ontario to Monterey

Our best United Airlines deals on Ontario to Monterey flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Ontario to Monterey that are best for you.

See travel insights to San Francisco from

How to get the cheapest flight ticket from Ontario to Monterey

What is the typical price of a round-trip flight between Ontario and Monterey?

What is the cheapest month to fly to Monterey?

What is the cheapest day to depart on your flight to Monterey?

What is the cheapest time of day to depart on your flight to Monterey?

What is the cheapest airline that flies from Ontario to Monterey Regional?

What airlines fly to Monterey?

When to book flights from Ontario to Monterey

Cheap Ontario to Monterey (ONT to MRY) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Ontario to Monterey

Best airlines flying from Ontario to Monterey

Compare and see reviews for airlines that fly from Ontario to Monterey with momondo

Why use momondo?

An easier way to manage your Monterey trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California

Fly your favorite airline to San Francisco

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to San Francisco

List of cabin classes available on flights landing in San Francisco. Availability may vary depending on flight origin and airline.

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Ontario

According to popular flight searches on momondo this year

Complete your trip to San Francisco

Explore popular destinations other users love

According to popular flight searches on momondo this year