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

JetBlue and United Airlines are the most popular carriers operating from Ontario to Costa Rica

What airlines fly to Costa Rica?

Alaska Airlines, United Airlines and Avianca are the top three most popular airlines that fly to Costa Rica from Ontario according to our data. Alaska Airlines is the first choice among our users, with 57% of people opting to fly with this airline when traveling to Costa Rica. Keep in mind that there are 12 different airlines that fly to Costa Rica 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 Costa Rica?

Prices for flights from Ontario Airport to Costa Rica were last updated today.

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

The number of operators available for flights from Ontario Airport to Costa Rica is 3 as of August 2026.

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

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 Ontario Airport to Costa Rica.

What documentation or ID do you need to fly to Costa Rica?

The travel and health documents required for your trip to Costa Rica 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 Costa Rica. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$205 Cheap Flights from Ontario to Costa Rica in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Costa Rica

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:50 am - 7:40 pmONT Ontario-SJO San José Juan Santamaria Intl

12h 50m2 stops Sacramento Intl Houston Hobby

2:15 pm - 10:00 pmSJO San José Juan Santamaria Intl-ONT Ontario

9h 45m1 stop Houston Hobby

$482Southwest

Tue, Oct 27 - Wed, Nov 4

10:30 pm - 11:25 amONT Ontario-SJO San José Juan Santamaria Intl

10h 55m1 stop San Salvador El Salvador Intl

3:05 pm - 8:55 pmSJO San José Juan Santamaria Intl-ONT Ontario

7h 50m1 stop San Salvador El Salvador Intl

$509Avianca

Thu, Nov 12 - Thu, Nov 19

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

8h 10m1 stop San Salvador El Salvador Intl

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

7h 35m1 stop San Salvador El Salvador Intl

$509Avianca

Sat, Aug 22 - Sat, Aug 29

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

8h 10m1 stop San Salvador El Salvador Intl

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

7h 35m1 stop San Salvador El Salvador Intl

$509Avianca

Sat, Oct 10 - Tue, Oct 13

6:50 pm - 1:15 pmONT Ontario-SJO San José Juan Santamaria Intl

16h 25m2 stops Las Vegas Harry Reid Intl Orlando

2:10 pm - 8:45 amSJO San José Juan Santamaria Intl-ONT Ontario

20h 35m2 stops Houston Hobby Las Vegas Harry Reid Intl

$512Southwest

Mon, Nov 2 - Tue, Nov 24

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

14h 30m2 stops Las Vegas Harry Reid Intl Orlando

1:20 pm - 7:45 amSJO San José Juan Santamaria Intl-ONT Ontario

20h 25m2 stops Orlando Las Vegas Harry Reid Intl

$512Southwest

Mon, Nov 2 - Tue, Nov 17

2:22 pm - 12:59 pmONT Ontario-SJO San José Juan Santamaria Intl

21h 37m2 stops Dallas/Fort Worth Miami

1:00 pm - 9:10 amSJO San José Juan Santamaria Intl-ONT Ontario

21h 10m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl

$521American Airlines

Tue, Sep 29 - Thu, Oct 15

8:25 am - 11:59 amONT Ontario-SJO San José Juan Santamaria Intl

26h 34m2 stops Dallas/Fort Worth Miami

1:00 pm - 10:37 pmSJO San José Juan Santamaria Intl-ONT Ontario

10h 37m1 stop Dallas/Fort Worth

$571American Airlines

Sat, Sep 19 - Fri, Sep 25

1:53 pm - 7:15 amONT Ontario-SJO San José Juan Santamaria Intl

16h 22m1 stop San Francisco

8:45 am - 8:01 pmSJO San José Juan Santamaria Intl-ONT Ontario

12h 16m1 stop San Francisco

$580United Airlines

Thu, Sep 10 - Sun, Sep 13

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

12h 37m1 stop Houston George Bush Intcntl

8:45 am - 8:01 pmSJO San José Juan Santamaria Intl-ONT Ontario

12h 16m1 stop San Francisco

$580United Airlines

Tue, Sep 8 - Mon, Sep 14

Cheap last minute flights

Enter your travel dates to find the best prices.

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

8h 10m1 stop San Salvador El Salvador Intl

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

13h 05m1 stop San Salvador El Salvador Intl

$509Avianca

Sat, Aug 15 - Sat, Aug 22

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

10h 55m1 stop San Salvador El Salvador Intl

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

7h 35m1 stop San Salvador El Salvador Intl

$509Avianca

Sat, Aug 15 - Sat, Aug 29

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

8h 10m1 stop San Salvador El Salvador Intl

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

27h 00m1 stop San Salvador El Salvador Intl

$565Avianca

Sat, Aug 15 - Wed, Aug 19

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

10h 55m1 stop San Salvador El Salvador Intl

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

13h 05m1 stop San Salvador El Salvador Intl

$577Avianca

Sat, Aug 15 - Thu, Aug 20

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

22h 03m2 stops Denver Intl Houston George Bush Intcntl

8:45 am - 5:36 pmSJO San José Juan Santamaria Intl-ONT Ontario

9h 51m1 stop San Francisco

$705United Airlines

Mon, Aug 17 - Mon, Oct 12

1:56 pm - 12:21 pmONT Ontario-SJO San José Juan Santamaria Intl

21h 25m2 stops San Francisco Houston George Bush Intcntl

7:55 am - 10:51 pmSJO San José Juan Santamaria Intl-ONT Ontario

15h 56m2 stops Houston George Bush Intcntl San Francisco

$705United Airlines

Mon, Aug 17 - Mon, Oct 12

6:00 am - 12:21 pmONT Ontario-SJO San José Juan Santamaria Intl

29h 21m1 stop Houston George Bush Intcntl

7:55 am - 9:59 pmSJO San José Juan Santamaria Intl-ONT Ontario

15h 04m1 stop Houston George Bush Intcntl

$715United Airlines

Mon, Aug 17 - Mon, Oct 12

9:36 pm - 10:00 pmONT Ontario-SJO San José Juan Santamaria Intl

23h 24m2 stops Guadalajara Miguel Hidal Mexico City Benito Juarez

7:00 am - 11:05 pmSJO San José Juan Santamaria Intl-ONT Ontario

17h 05m2 stops Mexico City Benito Juarez Guadalajara Miguel Hidal

$751Multiple Airlines

Fri, Aug 14 - Mon, Aug 17

9:36 pm - 10:00 pmONT Ontario-SJO San José Juan Santamaria Intl

23h 24m2 stops Guadalajara Miguel Hidal Mexico City Benito Juarez

7:00 am - 11:05 pmSJO San José Juan Santamaria Intl-ONT Ontario

17h 05m2 stops Mexico City Benito Juarez Guadalajara Miguel Hidal

$752Multiple Airlines

Fri, Aug 14 - Mon, Aug 17

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

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

7:00 am - 11:05 pmSJO San José Juan Santamaria Intl-ONT Ontario

17h 05m2 stops Mexico City Benito Juarez Guadalajara Miguel Hidal

$756Multiple Airlines

Fri, Aug 14 - Tue, Aug 18

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

Avianca flights from Ontario to Costa Rica

Our best Avianca deals on Ontario to Costa Rica flight tickets

Avianca

Aug 22

ONT11:35 pmOntario

10h 55m

1 stop

SJO11:30 amSan José Juan Santamaria Intl

Aug 25

SJO3:10 pmSan José Juan Santamaria Intl

7h 35m

1 stop

ONT9:45 pmOntario

$509

Avianca

Jan 5

ONT10:30 pmOntario

10h 55m

1 stop

SJO11:25 amSan José Juan Santamaria Intl

Jan 21

SJO3:05 pmSan José Juan Santamaria Intl

7h 50m

1 stop

ONT8:55 pmOntario

$519

Avianca

Nov 12

ONT10:30 pmOntario

10h 55m

1 stop

SJO11:25 amSan José Juan Santamaria Intl

Nov 21

SJO9:35 amSan José Juan Santamaria Intl

13h 20m

1 stop

ONT8:55 pmOntario

$524

American Airlines flights from Ontario to Costa Rica

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

American Airlines

Sep 29

ONT2:22 pmOntario

21h 37m

2 stops

SJO12:59 pmSan José Juan Santamaria Intl

Oct 15

SJO1:00 pmSan José Juan Santamaria Intl

21h 10m

2 stops

ONT9:10 amOntario

$521

American Airlines

Sep 19

ONT1:05 pmOntario

23h 52m

2 stops

SJO1:57 pmSan José Juan Santamaria Intl

Sep 25

SJO6:00 amSan José Juan Santamaria Intl

28h 29m

2 stops

ONT9:29 amOntario

$571

American Airlines

Sep 18

ONT2:22 pmOntario

20h 37m

2 stops

SJO11:59 amSan José Juan Santamaria Intl

Sep 25

SJO6:00 amSan José Juan Santamaria Intl

28h 29m

2 stops

ONT9:29 amOntario

$578

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Tue 10/27

5:50 am-7:40 pm

2 stops12h 50m

San José Juan Santamaria Intl

Wed 11/4

2:15 pm-10:00 pm

1 stop9h 45m

$482

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Thu 11/12

10:30 pm-11:25 am

1 stop10h 55m

San José Juan Santamaria Intl

Thu 11/19

3:05 pm-8:55 pm

1 stop7h 50m

$509

Quickest round-trip

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Sat 8/22

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Sat 8/29

3:10 pm-9:45 pm

1 stop7h 35m

$509

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Sat 10/10

11:35 pm-8:45 am

1 stop8h 10m

San José Juan Santamaria Intl

Tue 10/13

3:10 pm-9:45 pm

1 stop7h 35m

$509

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Mon 11/2

6:50 pm-1:15 pm

2 stops16h 25m

San José Juan Santamaria Intl

Tue 11/24

2:10 pm-8:45 am

2 stops20h 35m

$512

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Mon 11/2

8:45 pm-1:15 pm

2 stops14h 30m

San José Juan Santamaria Intl

Tue 11/17

1:20 pm-7:45 am

2 stops20h 25m

$512

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Tue 9/29

2:22 pm-12:59 pm

2 stops21h 37m

San José Juan Santamaria Intl

Thu 10/15

1:00 pm-9:10 am

2 stops21h 10m

$521

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Sat 9/19

8:25 am-11:59 am

2 stops26h 34m

San José Juan Santamaria Intl

Fri 9/25

1:00 pm-10:37 pm

1 stop10h 37m

$571

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Thu 9/10

1:53 pm-7:15 am

1 stop16h 22m

San José Juan Santamaria Intl

Sun 9/13

8:45 am-8:01 pm

1 stop12h 16m

$580

OntarioSan José

ONT Ontario - SJO San José Juan Santamaria Intl

ONTSJO

Ontario

Tue 9/8

6:00 am-7:37 pm

1 stop12h 37m

San José Juan Santamaria Intl

Mon 9/14

8:45 am-8:01 pm

1 stop12h 16m

$580

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 Costa Rica

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 month to fly to Costa Rica?

The cheapest month to fly to Costa Rica from Ontario is in October. Flight prices, which tend to average around $371, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in October, then December is your next best option. Flight prices from Ontario to Costa Rica during December average around $390.

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

You could potentially save up to 40% on your flight if you consider stops on a Ontario to Costa Rica flight.

Cheap Ontario to Costa Rica flight deals and tips

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

Fastest flight time	9h 08m
Direct flights	None

The fastest flight from Ontario to Costa Rica takes 9h 08m

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

Search flight deals

Frequently asked questions about flying from Ontario to Costa Rica

When did momondo last update prices for flights from Ontario Airport to Costa Rica?
Prices for flights from Ontario Airport to Costa Rica were last updated today.
How many operators does momondo search for flights from Ontario Airport to Costa Rica?
The number of operators available for flights from Ontario Airport to Costa Rica is 3 as of August 2026.
How old do you have to be to fly from Ontario Airport to Costa Rica?
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 Ontario Airport to Costa Rica.
What documentation or ID do you need to fly to Costa Rica?
The travel and health documents required for your trip to Costa Rica 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 Costa Rica. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to Costa Rica

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $371	Free Cancellation	Rating 7.4 10,111 reviews	Search United Airlines flights
American Airlines	PriceFrom $393	Free Cancellation	Rating 7.1 11,911 reviews	Search American Airlines flights
Avianca	PriceFrom $404	Free Cancellation	Rating 6.5 2,532 reviews	Search Avianca flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Costa Rica. Millions of users trust and use momondo every year so you are in good hands.

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

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

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

momondo provides multiple filters to help you find the best flight to Costa Rica from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Ontario to Costa Rica 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 Costa Rica 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

Fri 9/11

Fri 9/18

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 Costa Rica

Popular cities

Other flights from Ontario

Other flights to Costa Rica

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Costa Rica

Flights to San Joséfrom $264

Flights to Liberiafrom $322

Flights to Limon

Flights to Tamarindo

Flights to Tortuguero

Flights to Golfito

Flights to Tambor

Cheap flights from Ontario to Costa Rica from $205

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 Costa Rica departing on 9/30. 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 Costa Rica

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

Avianca flights from Ontario to Costa Rica

Our best Avianca deals on Ontario to Costa Rica flight tickets

American Airlines flights from Ontario to Costa Rica

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

momondo Fare Finder

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

See travel insights to Costa Rica from

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

What is the cheapest month to fly to Costa Rica?

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

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

What airlines fly to Costa Rica?

Cheap Ontario to Costa Rica flight deals and tips

Fastest flight time

Direct flights

Frequently asked questions about flying from Ontario to Costa Rica

Best airlines flying from Ontario to Costa Rica

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

Why use momondo?

An easier way to manage your Costa Rica 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 Costa Rica

Popular cities in Costa Rica

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

Ontario flight routes

According to popular flight searches on momondo this year

Costa Rica flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Costa Rica

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

Cabin classes currently available on flights to Costa Rica

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

Complete your trip to Costa Rica

Explore popular destinations other users love

According to popular flight searches on momondo this year