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 31% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 11 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 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 December 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.

$118 Cheap Flights from Monterey to Ontario in 2025/26

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Find the cheapest flights from Monterey to Los Angeles

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

9:45 pm - 2:26 pm

MRY

ONT

16h 41m1 stop

2:34 pm - 8:55 pm

ONT

MRY

6h 21m1 stop

$178Multiple Airlines

Fri, Jan 9 - Mon, Jan 12

9:45 pm - 7:50 pm

MRY

ONT

22h 05m1 stop

2:34 pm - 8:55 pm

ONT

MRY

6h 21m1 stop

$244Multiple Airlines

Fri, Jan 16 - Mon, Jan 19

6:40 am - 11:18 am

MRY

ONT

4h 38m1 stop

1:53 pm - 7:19 pm

ONT

MRY

5h 26m1 stop

$279United Airlines

Fri, Jan 9 - Sun, Jan 11

5:00 am - 12:47 pm

MRY

ONT

7h 47m1 stop

1:53 pm - 7:19 pm

ONT

MRY

5h 26m1 stop

$299United Airlines

Sat, Jan 24 - Wed, Jan 28

6:07 pm - 1:06 pm

MRY

ONT

18h 59m2 stops

6:00 am - 5:30 pm

ONT

MRY

11h 30m1 stop

$317Alaska Airlines

Fri, Jan 9 - Mon, Jan 12

5:50 am - 9:03 am

MRY

ONT

3h 13m1 stop

1:33 pm - 5:30 pm

ONT

MRY

3h 57m1 stop

$339United Airlines

Wed, May 27 - Tue, Jun 30

6:40 am - 5:43 pm

MRY

ONT

11h 03m1 stop

6:32 pm - 9:59 pm

ONT

MRY

3h 27m1 stop

$391United Airlines

Thu, Jan 8 - Sat, Jan 10

6:40 am - 12:17 pm

MRY

ONT

5h 37m1 stop

5:05 am - 9:59 pm

ONT

MRY

16h 54m2 stops

$402United Airlines

Sat, Jan 24 - Wed, Jan 28

6:40 am - 12:17 pm

MRY

ONT

5h 37m1 stop

5:05 am - 7:19 pm

ONT

MRY

14h 14m2 stops

$412United Airlines

Sat, Jan 24 - Wed, Jan 28

5:05 am - 12:38 pm

MRY

ONT

7h 33m1 stop

6:39 pm - 9:59 pm

ONT

MRY

3h 20m1 stop

$414United Airlines

Sat, Jan 3 - Mon, Jan 5

Alaska Airlines flights from Monterey to Ontario

Our best Alaska Airlines deals on Monterey to Ontario flight tickets

Alaska Airlines

Jan 9

MRY6:07 pmMonterey Regional

5h 49m

1 stop

ONT11:56 pmOntario

Jan 11

ONT6:00 amOntario

11h 30m

1 stop

MRY5:30 pmMonterey Regional

$279

Find similar

Alaska Airlines

Jan 6

MRY6:00 amMonterey Regional

11h 11m

2 stops

ONT5:11 pmOntario

Jan 11

ONT6:00 amOntario

11h 30m

1 stop

MRY5:30 pmMonterey Regional

$314

Find similar

Alaska Airlines

Jan 9

MRY6:07 pmMonterey Regional

18h 59m

2 stops

ONT1:06 pmOntario

Jan 12

ONT6:00 amOntario

11h 30m

1 stop

MRY5:30 pmMonterey Regional

$317

Find similar

United Airlines flights from Monterey to Ontario

Our best United Airlines deals on Monterey to Ontario flight tickets

United Airlines

Jan 5

MRY2:30 pmMonterey Regional

3h 13m

1 stop

ONT5:43 pmOntario

Jan 10

ONT6:32 pmOntario

3h 27m

1 stop

MRY9:59 pmMonterey Regional

$299

Find similar

United Airlines

May 27

MRY5:50 amMonterey Regional

3h 13m

1 stop

ONT9:03 amOntario

Jun 30

ONT1:33 pmOntario

3h 57m

1 stop

MRY5:30 pmMonterey Regional

$339

Find similar

United Airlines

Dec 12

MRY2:33 pmMonterey Regional

3h 04m

1 stop

ONT5:37 pmOntario

Dec 14

ONT6:00 amOntario

4h 33m

1 stop

MRY10:33 amMonterey Regional

$364

Find similar

Fly from

Fly to

Route

Depart

Return

Price

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Fri 1/9

9:45 pm-2:26 pm

1 stop16h 41m

Ontario

Mon 1/12

2:34 pm-8:55 pm

1 stop6h 21m

$178

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Fri 1/16

9:45 pm-7:50 pm

1 stop22h 05m

Ontario

Mon 1/19

2:34 pm-8:55 pm

1 stop6h 21m

$244

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Fri 1/9

6:40 am-11:18 am

1 stop4h 38m

Ontario

Sun 1/11

1:53 pm-7:19 pm

1 stop5h 26m

$279

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Sat 1/24

5:00 am-12:47 pm

1 stop7h 47m

Ontario

Wed 1/28

1:53 pm-7:19 pm

1 stop5h 26m

$299

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Fri 1/9

6:07 pm-1:06 pm

2 stops18h 59m

Ontario

Mon 1/12

6:00 am-5:30 pm

1 stop11h 30m

$317

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Wed 5/27

5:50 am-9:03 am

1 stop3h 13m

Ontario

Tue 6/30

1:33 pm-5:30 pm

1 stop3h 57m

$339

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Thu 1/8

6:40 am-5:43 pm

1 stop11h 03m

Ontario

Sat 1/10

6:32 pm-9:59 pm

1 stop3h 27m

$391

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Sat 1/24

6:40 am-12:17 pm

1 stop5h 37m

Ontario

Wed 1/28

5:05 am-9:59 pm

2 stops16h 54m

$402

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Sat 1/24

6:40 am-12:17 pm

1 stop5h 37m

Ontario

Wed 1/28

5:05 am-7:19 pm

2 stops14h 14m

$412

MontereyOntario

MRY - ONT

MRYONT

Monterey Regional

Sat 1/3

5:05 am-12:38 pm

1 stop7h 33m

Ontario

Mon 1/5

6:39 pm-9:59 pm

1 stop3h 20m

$414

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 $131. This is often the case because there is less demand to fly during this day of the week. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Monterey to Ontario for around $178.

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

In the evening is the cheapest time of day to fly from Monterey to Ontario when you can find flight prices for as low as $122. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $218 on average. Flights to Ontario from Monterey at noon 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

Fastest flight time	3h 13m
Direct flights	None

The fastest flight from Monterey to Ontario takes 3h 13m

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

Search flight deals

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 13m.
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 December 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 9,095 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.