What airlines fly to Ontario?

Frontier, Southwest and United Airlines are the top three most popular airlines that fly to Ontario from Monterey according to our data. Frontier is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 10 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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

Alaska Airlines, American Airlines, and United Airlines are the most popular carriers operating from Monterey Regional to Ontario

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

Prices for flights from Monterey Regional Airport to Ontario Airport refresh daily.

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

The number of operators available for flights from Monterey Regional Airport to Ontario Airport is 1 as of September 2025.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Monterey Regional Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$105 Cheap Flights from Monterey to Ontario in 2025/26

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Find the cheapest flights from Monterey to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

7:50 am - 12:37 pmMRY-ONT

4h 47m1 stop

6:38 pm - 9:58 pmONT-MRY

3h 20m1 stop

$279United Airlines

Find Deal

Wed, Oct 29 - Tue, Nov 4

2:19 pm - 5:40 pmMRY-ONT

3h 21m1 stop

6:51 pm - 9:38 pmONT-MRY

2h 47m1 stop

$289United Airlines

Find Deal

Tue, Sep 30 - Sat, Oct 4

11:14 am - 8:53 pmMRY-ONT

9h 39m1 stop

4:11 pm - 10:37 amONT-MRY

18h 26m1 stop

$302Alaska Airlines

Find Deal

Wed, Oct 29 - Tue, Nov 4

10:10 pm - 12:37 pmMRY-ONT

14h 27m1 stop

6:05 am - 8:29 pmONT-MRY

14h 24m1 stop

$309Multiple Airlines

Find Deal

Fri, Oct 10 - Mon, Oct 13

7:50 am - 12:37 pmMRY-ONT

4h 47m1 stop

5:00 am - 9:33 amONT-MRY

4h 33m1 stop

$314United Airlines

Find Deal

Thu, Oct 30 - Sun, Nov 2

7:57 pm - 12:37 pmMRY-ONT

16h 40m1 stop

1:31 pm - 7:15 pmONT-MRY

5h 44m1 stop

$322Alaska Airlines

Find Deal

Sat, Oct 11 - Sat, Oct 25

2:19 pm - 5:40 pmMRY-ONT

3h 21m1 stop

6:36 pm - 10:33 amONT-MRY

15h 57m1 stop

$332United Airlines

Find Deal

Wed, Oct 15 - Wed, Oct 22

7:50 am - 12:37 pmMRY-ONT

4h 47m1 stop

6:41 pm - 9:59 pmONT-MRY

3h 18m1 stop

$344United Airlines

Find Deal

Mon, Dec 1 - Tue, Dec 9

11:14 am - 8:53 pmMRY-ONT

9h 39m1 stop

6:03 pm - 10:37 amONT-MRY

16h 34m2 stops

$351Alaska Airlines

Find Deal

Wed, Oct 29 - Tue, Nov 4

11:14 am - 8:53 pmMRY-ONT

9h 39m1 stop

6:11 pm - 10:37 amONT-MRY

16h 26m1 stop

$352Alaska Airlines

Find Deal

Fri, Oct 31 - Mon, Nov 3

United Airlines flights from Monterey to Ontario

Our best United Airlines deals on Monterey to Ontario flight tickets

United Airlines

Oct 29

MRY7:50 amMonterey Regional

4h 47m

1 stop

ONT12:37 pmOntario

Nov 4

ONT6:38 pmOntario

3h 20m

1 stop

MRY9:58 pmMonterey Regional

$279

Find similar

United Airlines

Sep 30

MRY2:19 pmMonterey Regional

3h 21m

1 stop

ONT5:40 pmOntario

Oct 4

ONT6:51 pmOntario

2h 47m

1 stop

MRY9:38 pmMonterey Regional

$289

Find similar

United Airlines

Sep 24

MRY2:20 pmMonterey Regional

3h 17m

1 stop

ONT5:37 pmOntario

Sep 29

ONT6:36 pmOntario

3h 02m

1 stop

MRY9:38 pmMonterey Regional

$294

Find similar

Alaska Airlines flights from Monterey to Ontario

Our best Alaska Airlines deals on Monterey to Ontario flight tickets

Alaska Airlines

Oct 29

MRY11:14 amMonterey Regional

9h 39m

1 stop

ONT8:53 pmOntario

Nov 4

ONT4:11 pmOntario

18h 26m

1 stop

MRY10:37 amMonterey Regional

$302

Find similar

Alaska Airlines

Oct 11

MRY7:57 pmMonterey Regional

16h 40m

1 stop

ONT12:37 pmOntario

Oct 25

ONT1:31 pmOntario

5h 44m

1 stop

MRY7:15 pmMonterey Regional

$322

Find similar

Alaska Airlines

Oct 29

MRY11:14 amMonterey Regional

9h 39m

1 stop

ONT8:53 pmOntario

Nov 4

ONT6:03 pmOntario

16h 34m

2 stops

MRY10:37 amMonterey Regional

$351

Find similar

Fly from

Fly to

Route

Depart

Return

Price

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Wed 10/29

7:50 am-12:37 pm

1 stop4h 47m

Ontario

Tue 11/4

6:38 pm-9:58 pm

1 stop3h 20m

$279

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Tue 9/30

2:19 pm-5:40 pm

1 stop3h 21m

Ontario

Sat 10/4

6:51 pm-9:38 pm

1 stop2h 47m

$289

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Wed 10/29

11:14 am-8:53 pm

1 stop9h 39m

Ontario

Tue 11/4

4:11 pm-10:37 am

1 stop18h 26m

$302

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Fri 10/10

10:10 pm-12:37 pm

1 stop14h 27m

Ontario

Mon 10/13

6:05 am-8:29 pm

1 stop14h 24m

$309

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Thu 10/30

7:50 am-12:37 pm

1 stop4h 47m

Ontario

Sun 11/2

5:00 am-9:33 am

1 stop4h 33m

$314

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Sat 10/11

7:57 pm-12:37 pm

1 stop16h 40m

Ontario

Sat 10/25

1:31 pm-7:15 pm

1 stop5h 44m

$322

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Wed 10/15

2:19 pm-5:40 pm

1 stop3h 21m

Ontario

Wed 10/22

6:36 pm-10:33 am

1 stop15h 57m

$332

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Mon 12/1

7:50 am-12:37 pm

1 stop4h 47m

Ontario

Tue 12/9

6:41 pm-9:59 pm

1 stop3h 18m

$344

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Wed 10/29

11:14 am-8:53 pm

1 stop9h 39m

Ontario

Tue 11/4

6:03 pm-10:37 am

2 stops16h 34m

$351

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Fri 10/31

11:14 am-8:53 pm

1 stop9h 39m

Ontario

Mon 11/3

6:11 pm-10:37 am

1 stop16h 26m

$352

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 Monterey to Ontario

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 cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Monday when prices can be found for as low as $110. This is often the case because there is less demand to fly during this day of the week. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Monterey to Ontario for around $168.

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

At noon is the cheapest time of day to fly from Monterey to Ontario when you can find flight prices for as low as $113. Flying to Ontario at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $169 on average. Flights to Ontario from Monterey in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Monterey to Ontario

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

Estimated round-trip price

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

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

Direct flights	None

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

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How far is Monterey Regional to Ontario by plane?
A flight from Monterey Regional to Ontario will travel around 296.3 mi. In terms of flight time, this usually takes a little over 3h 21m.
When did momondo last update prices for flights from Monterey Regional Airport to Ontario Airport?
Prices for flights from Monterey Regional Airport to Ontario Airport refresh daily.
How many operators does momondo search for flights from Monterey Regional Airport to Ontario Airport?
The number of operators available for flights from Monterey Regional Airport to Ontario Airport is 1 as of September 2025.
How old do you have to be to fly from Monterey Regional Airport to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Monterey Regional Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Monterey to Ontario?
Based on momondo bookings for flights between Monterey and Ontario, the leading airline is United Airlines, making up 100% of the total bookings.

Best airlines flying from Monterey to Ontario

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $218	Free Cancellation	Rating 7.4 8,926 reviews		Search United Airlines flights

Why use momondo?

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

It is quick and easy to find Monterey to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

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

Yes. momondo allows you to filter the results for Monterey to Ontario flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Monterey to Ontario.

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

Yes. momondo can track prices for Monterey to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.