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$168+ Cheap flights from San Juan to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ONT
Apr 29 — May 61
Tue 4/29
Tue 5/6
1 adult, Economy
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Cheap flight deals from San Juan to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 24, 2025.

Round-trip from

$436
(JetBlue)

One-way from

$168
(Trip.com)

Popular in

June

Cheapest in

March

Average price

$590
From San Juan to Ontario
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One-way flight from San Juan to Ontario
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Highest demand for flights based on searches. 7% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from San Juan to Ontario

Cheapest flights from San Juan to Ontario
Explore the most affordable flight options available from San Juan to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

This JetBlue deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/3011:55 amSJU - ONT
1 stop12h 16mJetBlue
Mon 6/210:59 pmONT - SJU
1 stop10h 45mJetBlue
Deal found 4/23$436
This United Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/22:00 pmSJU - ONT
1 stop9h 33mUnited Airlines
Sat 10/185:10 amONT - SJU
1 stop9h 20mUnited Airlines
Deal found 4/23$445
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/12:28 pmSJU - ONT
1 stop11h 13mDelta
Thu 10/910:59 pmONT - SJU
1 stop9h 48mDelta
Deal found 4/23$520
This American Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/76:30 amSJU - ONT
1 stop15h 06mAmerican Airlines
Mon 5/1911:59 pmONT - SJU
2 stops11h 41mAmerican Airlines
Deal found 4/23$535
This Southwest deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2810:45 amSJU - ONT
2 stops13h 20mSouthwest
Fri 5/27:35 pmONT - SJU
2 stops11h 40mSouthwest
Deal found 4/23$645
This Alaska Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/23:10 pmSJU - ONT
2 stops30h 13mAlaska Airlines
Sat 10/186:00 pmONT - SJU
2 stops17h 07mAlaska Airlines
Deal found 4/23$923
This Mytrip deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2810:15 pmSJU - ONT
3 stops27h 58mMultiple Airlines
Thu 5/11:09 amONT - SJU
3 stops39h 31mMultiple Airlines
Deal found 4/23$1,278

Cheapflights Fare Finder

Customize your flight search to find flights from San Juan to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 24, 2025.
Use the filters below to find and compare flights from San Juan to Ontario that are best for you.

Fly from

San Juan

Fly to

Ontario

Route

Depart

Return

Price

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Fri 5/30

11:55 am-9:11 pm

1 stop12h 16m

Ontario

Mon 6/2

10:59 pm-12:44 pm

1 stop10h 45m

$436

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 10/2

2:00 pm-8:33 pm

1 stop9h 33m

Ontario

Sat 10/18

5:10 am-5:30 pm

1 stop9h 20m

$445

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 10/1

2:28 pm-10:41 pm

1 stop11h 13m

Ontario

Thu 10/9

10:59 pm-11:47 am

1 stop9h 48m

$520

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 5/7

6:30 am-6:23 pm

2 stops14h 53m

Ontario

Mon 5/19

11:59 pm-2:40 pm

2 stops11h 41m

$535

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 10/2

3:10 pm-6:23 pm

2 stops30h 13m

Ontario

Sat 10/18

6:00 pm-2:07 pm

2 stops17h 07m

$923

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Mon 5/12

12:05 am-12:08 pm

2 stops15h 03m

$168

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 5/17

11:50 am-11:43 pm

2 stops14h 53m

$178

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 5/13

1:05 am-12:38 pm

2 stops14h 33m

$223

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Fri 5/16

11:58 am-9:11 pm

1 stop12h 13m

$241

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 6/3

1:55 pm-11:42 pm

2 stops12h 47m

$243

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 13 results
1
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Best time to book a flight from San Juan to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from San Juan with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Juan to Ontario

What is the cheapest month to book a flight from San Juan to Ontario?

Currently, August is the cheapest month in which you can book a flight from San Juan to Ontario (average of $246). Flying from San Juan to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SJU to ONT?

Find hourly flight availability from San Juan to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2025.

A simple way to save on the total cost of your ticket is to fly from San Juan to Ontario in the morning. If you’re flexible enough to do this you can expect to save up to 46% on your trip compared to booking a flight in the afternoon.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated April 24, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from San Juan to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,918 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,918 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,920 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,685 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
JetBlue
7.3
Good
2,924 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

Find useful and relevant information for your journey from San Juan to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from San Juan?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from San Juan to Ontario. 3 airlines have flights to Ontario from San Juan on a regular basis. Booking flights from San Juan to Ontario should not be difficult; the airport handles an average of 0 inbound flights from San Juan per day.

  • What are the cheapest airlines flying from San Juan to Ontario round-trip?

    Flying on JetBlue is currently your cheapest option to Ontario, with prices starting at $436. Additional round-trip tickets that might be worth considering are offered by United Airlines and Delta, with the lowest prices starting at $445 and $520, respectively. You may be able to fly from San Juan to Ontario for 19% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from San Juan to Ontario one-way?

    One-way options have recently been found by users for as low as $168 on Frontier. Other airlines that offer cheap prices include American Airlines from $178 and United Airlines from $223 one-way.

  • Can I find deals for flights from San Juan to Ontario that include hotel bookings?

    Yes. In addition to deals on San Juan to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Juan to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Juan to Ontario.

  • Can I find deals for business class flights from San Juan to Ontario?

    Yes. Cheapflights offers flight deals from San Juan to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Juan to Ontario?

    Currently, August is the cheapest month in which you can book a flight from San Juan to Ontario (average of $246). Flying from San Juan to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 3 airlines flying from San Juan to Ontario

Discover the top 3 airlines that operate flights from San Juan to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$344Average$664FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$347Average$480FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$395Average$734FlexibilityNo cancel feeOn-time69%

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