What airlines fly to Ontario?

Alaska Airlines, Avianca and United Airlines are the top three most popular airlines that fly to Ontario from Costa Rica according to our data. Alaska Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 9 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 Costa Rica to Ontario?

United Airlines is the most popular carrier operating from Costa Rica to Ontario

How long does it take to fly to Ontario?

Average flight duration from Costa Rica to Ontario depends on which airport you fly into and out of. Flying from Liberia to Los Angeles is 5h 51m on average, while flying from San José to Los Angeles is 6h 13m on average. Los Angeles is the most popular airport in Ontario.

When did momondo last update prices for flights from Costa Rica to Ontario Airport?

Prices for flights from Costa Rica to Ontario Airport refresh daily.

How many operators does momondo search for flights from Costa Rica to Ontario Airport?

There are 2 operators available for flights from Costa Rica to Ontario Airport as of August 2026.

How old do you have to be to fly from Costa Rica to Ontario 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 Costa Rica to Ontario Airport.

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

The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$256 Cheap Flights from Costa Rica to Ontario in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Costa Rica to Los Angeles

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One-way

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Recent round-trip flight deals from Costa Rica to Los Angeles

Enter your travel dates to find the best prices.

1:40 pm - 10:05 pmSJO San José Juan Santamaria Intl-ONT Ontario

9h 25m1 stop Houston Hobby

7:30 am - 7:40 pmONT Ontario-SJO San José Juan Santamaria Intl

11h 10m2 stops Austin Bergstrom Houston Hobby

$515Southwest

Wed, Sep 30 - Wed, Oct 7

2:10 pm - 8:50 amSJO San José Juan Santamaria Intl-ONT Ontario

20h 40m2 stops Houston Hobby Las Vegas Harry Reid Intl

8:45 pm - 1:15 pmONT Ontario-SJO San José Juan Santamaria Intl

14h 30m2 stops Las Vegas Harry Reid Intl Orlando

$515Southwest

Thu, Dec 17 - Mon, Jan 4

2:10 pm - 8:50 amSJO San José Juan Santamaria Intl-ONT Ontario

20h 40m2 stops Houston Hobby Las Vegas Harry Reid Intl

3:00 pm - 12:50 pmONT Ontario-SJO San José Juan Santamaria Intl

19h 50m2 stops Phoenix Sky Harbor Intl Orlando

$515Southwest

Fri, Nov 6 - Sun, Jan 10

7:45 am - 9:41 pmSJO San José Juan Santamaria Intl-ONT Ontario

14h 56m1 stop Houston George Bush Intcntl

6:00 am - 10:25 amONT Ontario-SJO San José Juan Santamaria Intl

27h 25m1 stop Houston George Bush Intcntl

$533United Airlines

Sun, Oct 25 - Wed, Oct 28

8:45 am - 9:38 amSJO San José Juan Santamaria Intl-ONT Ontario

26h 53m2 stops Houston George Bush Intcntl San Francisco

5:45 am - 8:39 pmONT Ontario-SJO San José Juan Santamaria Intl

12h 54m1 stop Houston George Bush Intcntl

$533United Airlines

Wed, Dec 2 - Wed, Dec 9

8:45 am - 9:40 pmSJO San José Juan Santamaria Intl-ONT Ontario

14h 55m1 stop Houston George Bush Intcntl

6:00 am - 8:39 pmONT Ontario-SJO San José Juan Santamaria Intl

12h 39m1 stop Houston George Bush Intcntl

$533United Airlines

Thu, Nov 12 - Mon, Nov 16

9:00 am - 10:05 pmSJO San José Juan Santamaria Intl-ONT Ontario

14h 05m2 stops Orlando Denver Intl

6:10 am - 7:40 pmONT Ontario-SJO San José Juan Santamaria Intl

12h 30m2 stops Phoenix Sky Harbor Intl Houston Hobby

$542Southwest

Wed, Sep 30 - Wed, Oct 7

3:10 pm - 8:50 pmSJO San José Juan Santamaria Intl-ONT Ontario

7h 40m1 stop San Salvador El Salvador Intl

10:45 pm - 8:50 amONT Ontario-SJO San José Juan Santamaria Intl

8h 05m1 stop San Salvador El Salvador Intl

$691Avianca

Sat, Dec 12 - Sat, Feb 20

3:10 pm - 9:45 pmSJO San José Juan Santamaria Intl-ONT Ontario

7h 35m1 stop San Salvador El Salvador Intl

10:45 pm - 8:50 amONT Ontario-SJO San José Juan Santamaria Intl

8h 05m1 stop San Salvador El Salvador Intl

$691Avianca

Thu, Oct 15 - Thu, Dec 3

3:10 pm - 8:50 pmSJO San José Juan Santamaria Intl-ONT Ontario

7h 40m1 stop San Salvador El Salvador Intl

10:45 pm - 8:50 amONT Ontario-SJO San José Juan Santamaria Intl

8h 05m1 stop San Salvador El Salvador Intl

$691Avianca

Tue, Nov 17 - Sat, Nov 21

Recent last minute flight deals from Costa Rica to Los Angeles

Enter your travel dates to find the best prices.

8:45 am - 3:41 pmSJO San José Juan Santamaria Intl-ONT Ontario

31h 56m1 stop San Francisco

1:18 pm - 7:37 pmONT Ontario-SJO San José Juan Santamaria Intl

29h 19m2 stops Denver Intl Houston George Bush Intcntl

$600United Airlines

Fri, Sep 4 - Tue, Sep 8

8:45 am - 3:41 pmSJO San José Juan Santamaria Intl-ONT Ontario

31h 56m1 stop San Francisco

6:00 am - 7:37 pmONT Ontario-SJO San José Juan Santamaria Intl

12h 37m1 stop Houston George Bush Intcntl

$600United Airlines

Fri, Sep 4 - Tue, Sep 8

8:45 am - 6:11 pmSJO San José Juan Santamaria Intl-ONT Ontario

10h 26m1 stop San Francisco

1:56 pm - 7:15 amONT Ontario-SJO San José Juan Santamaria Intl

16h 19m1 stop San Francisco

$644United Airlines

Thu, Sep 3 - Sat, Sep 5

8:45 am - 6:11 pmSJO San José Juan Santamaria Intl-ONT Ontario

10h 26m1 stop San Francisco

1:18 pm - 12:21 pmONT Ontario-SJO San José Juan Santamaria Intl

22h 03m2 stops Denver Intl Houston George Bush Intcntl

$644United Airlines

Thu, Sep 3 - Sat, Sep 5

1:25 pm - 9:59 pmSJO San José Juan Santamaria Intl-ONT Ontario

9h 34m1 stop Houston George Bush Intcntl

1:56 pm - 7:15 amONT Ontario-SJO San José Juan Santamaria Intl

16h 19m1 stop San Francisco

$763Copa Airlines

Thu, Sep 3 - Sat, Sep 5

1:33 pm - 7:46 pmSJO San José Juan Santamaria Intl-ONT Ontario

31h 13m3 stops Cancun Mexico City Benito Juarez Guadalajara Miguel Hidal

9:36 pm - 9:56 pmONT Ontario-SJO San José Juan Santamaria Intl

23h 20m2 stops Guadalajara Miguel Hidal Mexico City Benito Juarez

$849Multiple Airlines

Thu, Sep 3 - Wed, Sep 16

3:10 pm - 9:45 pmSJO San José Juan Santamaria Intl-ONT Ontario

7h 35m1 stop San Salvador El Salvador Intl

11:35 pm - 8:45 amONT Ontario-SJO San José Juan Santamaria Intl

8h 10m1 stop San Salvador El Salvador Intl

$892Avianca

Sat, Sep 5 - Sat, Sep 26

1:25 pm - 6:12 pmSJO San José Juan Santamaria Intl-ONT Ontario

29h 47m1 stop Houston George Bush Intcntl

7:13 pm - 7:15 amONT Ontario-SJO San José Juan Santamaria Intl

11h 02m1 stop San Francisco

$900Multiple Airlines

Fri, Sep 4 - Thu, Sep 17

9:40 am - 9:45 pmSJO San José Juan Santamaria Intl-ONT Ontario

13h 05m1 stop San Salvador El Salvador Intl

11:35 pm - 11:30 amONT Ontario-SJO San José Juan Santamaria Intl

10h 55m1 stop San Salvador El Salvador Intl

$1,359Avianca

Tue, Sep 1 - Tue, Sep 15

3:10 pm - 9:45 pmSJO San José Juan Santamaria Intl-ONT Ontario

7h 35m1 stop San Salvador El Salvador Intl

11:35 pm - 6:50 pmONT Ontario-SJO San José Juan Santamaria Intl

18h 15m1 stop San Salvador El Salvador Intl

$1,359Avianca

Tue, Sep 1 - Tue, Sep 15

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United Airlines flights from Costa Rica to Ontario

Our best United Airlines deals on Costa Rica to Ontario flight tickets

United Airlines

Oct 23

SJO1:25 pmSan José Juan Santamaria Intl

9h 34m

1 stop

ONT9:59 pmOntario

Oct 27

ONT4:17 pmOntario

14h 15m

1 stop

SJO7:32 amSan José Juan Santamaria Intl

$533

United Airlines

Oct 22

SJO8:45 amSan José Juan Santamaria Intl

15h 06m

1 stop

ONT10:51 pmOntario

Oct 25

ONT6:00 amOntario

12h 39m

1 stop

SJO7:39 pmSan José Juan Santamaria Intl

$542

United Airlines

Oct 22

SJO8:45 amSan José Juan Santamaria Intl

15h 06m

1 stop

ONT10:51 pmOntario

Oct 25

ONT6:00 amOntario

27h 25m

2 stops

SJO10:25 amSan José Juan Santamaria Intl

$546

Avianca flights from Costa Rica to Ontario

Our best Avianca deals on Costa Rica to Ontario flight tickets

Avianca

Dec 12

SJO3:10 pmSan José Juan Santamaria Intl

7h 40m

1 stop

ONT8:50 pmOntario

Feb 20

ONT10:45 pmOntario

8h 05m

1 stop

SJO8:50 amSan José Juan Santamaria Intl

$691

Avianca

Oct 17

SJO3:10 pmSan José Juan Santamaria Intl

7h 35m

1 stop

ONT9:45 pmOntario

Oct 22

ONT11:35 pmOntario

8h 10m

1 stop

SJO8:45 amSan José Juan Santamaria Intl

$704

Avianca

Oct 17

SJO3:10 pmSan José Juan Santamaria Intl

7h 35m

1 stop

ONT9:45 pmOntario

Oct 22

ONT11:35 pmOntario

8h 10m

1 stop

SJO8:45 amSan José Juan Santamaria Intl

$707

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Wed 9/30

1:40 pm-10:05 pm

1 stop9h 25m

Ontario

Wed 10/7

7:30 am-7:40 pm

2 stops11h 10m

$515

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Thu 12/17

2:10 pm-8:50 am

2 stops20h 40m

Ontario

Mon 1/4

8:45 pm-1:15 pm

2 stops14h 30m

$515

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Fri 11/6

2:10 pm-8:50 am

2 stops20h 40m

Ontario

Sun 1/10

3:00 pm-12:50 pm

2 stops19h 50m

$515

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Sun 10/25

7:45 am-9:41 pm

1 stop14h 56m

Ontario

Wed 10/28

6:00 am-10:25 am

1 stop27h 25m

$533

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Wed 12/2

8:45 am-9:38 am

2 stops26h 53m

Ontario

Wed 12/9

5:45 am-8:39 pm

1 stop12h 54m

$533

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Thu 11/12

8:45 am-9:40 pm

1 stop14h 55m

Ontario

Mon 11/16

6:00 am-8:39 pm

1 stop12h 39m

$533

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Wed 9/30

9:00 am-10:05 pm

2 stops14h 05m

Ontario

Wed 10/7

6:10 am-7:40 pm

2 stops12h 30m

$542

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Sat 12/12

3:10 pm-8:50 pm

1 stop7h 40m

Ontario

Sat 2/20

10:45 pm-8:50 am

1 stop8h 05m

$691

Quickest round-trip

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Thu 10/15

3:10 pm-9:45 pm

1 stop7h 35m

Ontario

Thu 12/3

10:45 pm-8:50 am

1 stop8h 05m

$691

San JoséOntario

SJO San José Juan Santamaria Intl - ONT Ontario

SJOONT

San José Juan Santamaria Intl

Tue 11/17

3:10 pm-8:50 pm

1 stop7h 40m

Ontario

Sat 11/21

10:45 pm-8:50 am

1 stop8h 05m

$691

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 Costa Rica 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

Other information

What is the cheapest month to fly to Ontario?

In general, January is the cheapest month to fly from Costa Rica to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $327. If you aren’t able to travel during the month of January, then book flights to Ontario from Costa Rica during November instead. Flights to Ontario in November, while not as cheap as those in January, still average around $383.

How far in advance should I book a flight from Costa Rica to Ontario?

You are more likely to see cheaper flights to Ontario from Costa Rica when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $495 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Costa Rica for as low as $344 on momondo.

Can stopping save me money on Costa Rica to Ontario flights?

You could potentially save up to 47% on your flight if you consider stops on a Costa Rica to Ontario flight.

Cheap Costa Rica to Ontario flight deals and tips

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

Best Price Found	$256
Fastest flight time	9h 20m
Direct flights	None

The best one-way flight to Ontario from Costa Rica in the past 72 hours is $256. The best round-trip flight deal from Costa Rica to Ontario found on momondo in the last 72 hours is $515.

The fastest flight from Costa Rica to Ontario takes 9h 20m

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

Search flight deals

Frequently asked questions about flying from Costa Rica to Ontario

When did momondo last update prices for flights from Costa Rica to Ontario Airport?
Prices for flights from Costa Rica to Ontario Airport refresh daily.
How many operators does momondo search for flights from Costa Rica to Ontario Airport?
There are 2 operators available for flights from Costa Rica to Ontario Airport as of August 2026.
How old do you have to be to fly from Costa Rica to Ontario 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 Costa Rica to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Costa Rica to Ontario

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $267	Free Cancellation	Rating 7.4 10,147 reviews		Search United Airlines flights
Avianca	PriceFrom $387	Free Cancellation	Rating 6.5 2,555 reviews		Search Avianca flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Costa Rica.

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

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

How can momondo help me find flights from Costa Rica to Ontario?

Once all potential Costa Rica to Ontario 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 Costa Rica to Ontario right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Costa Rica 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.

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Cheap flights from Costa Rica to Los Angeles from $256

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Costa Rica to Los Angeles departing on 12/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Costa Rica to Ontario

Our best United Airlines deals on Costa Rica to Ontario flight tickets

Avianca flights from Costa Rica to Ontario

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How to get the cheapest flight ticket from Costa Rica to Ontario

What is the cheapest month to fly to Ontario?

How far in advance should I book a flight from Costa Rica to Ontario?

Can stopping save me money on Costa Rica to Ontario flights?

What is the cheapest airline that flies from Costa Rica to Ontario?

What airlines fly to Ontario?

How long does it take to fly to Ontario?

Cheap Costa Rica to Ontario flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Costa Rica to Ontario

Best airlines flying from Costa Rica to Ontario

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

Why use momondo?

An easier way to manage your Ontario 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.

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

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

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