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$146+ Cheap flights from Luis Munoz Marin Intl (SJU) 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ONT
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheap flight deals from Luis Munoz Marin Intl to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Luis Munoz Marin Intl (SJU) 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 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$520
(United Airlines)

One-way from

$146
(Trip.com)

Popular in

June

Cheapest in

March

Average price

$535
Provider with most accurate pricing for San Juan Luis Munoz Marin Intl-Ontario flight deals.
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Provider most trusted by Cheapflights users for San Juan Luis Munoz Marin Intl-Ontario flights.
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From San Juan Luis Munoz Marin Intl to Ontario
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One-way flight from San Juan Luis Munoz Marin Intl to Ontario
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Highest demand for flights based on searches. 10% potential increase in price ($59 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($31 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 Luis Munoz Marin Intl to Ontario

Cheapest flights from Luis Munoz Marin Intl to Ontario
Explore the most affordable flight options available from Luis Munoz Marin Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This American Airlines deal was found by Cheapflights users on 4/17. 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.
Thu 11/209:35 amSJU - ONT
1 stop14h 36mAmerican Airlines
Sun 12/78:05 pmONT - SJU
2 stops13h 15mAmerican Airlines
Deal found 4/17$416
This United Airlines deal was found by Cheapflights users on 4/16. 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.
Tue 10/212:55 pmSJU - ONT
1 stop10h 01mUnited Airlines
Tue 10/285:40 amONT - SJU
1 stop8h 39mUnited Airlines
Deal found 4/16$445
This Southwest deal was found by Cheapflights users on 4/17. 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.
Wed 5/215:20 amSJU - ONT
2 stops13h 25mSouthwest
Fri 5/238:00 amONT - SJU
2 stops12h 55mSouthwest
Deal found 4/17$530
This JetBlue deal was found by Cheapflights users on 4/17. 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.
Sat 5/311:55 amSJU - ONT
1 stop12h 30mJetBlue
Wed 5/710:59 pmONT - SJU
1 stop10h 35mJetBlue
Deal found 4/17$596
This Alaska Airlines deal was found by Cheapflights users on 4/17. 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.
Tue 12/24:35 pmSJU - ONT
2 stops29h 42mAlaska Airlines
Tue 12/96:00 pmONT - SJU
2 stops16h 40mAlaska Airlines
Deal found 4/17$927

Cheapflights Fare Finder

Customize your flight search to find flights from Luis Munoz Marin Intl 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 17, 2025.
Use the filters below to find and compare flights from San Juan Luis Munoz Marin Intl Airport to Ontario that are best for you.

Fly from

Luis Munoz Marin Intl

Fly to

Ontario

Route

Depart

Return

Price

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 10/1

2:00 pm-8:33 pm

1 stop9h 33m

Ontario

Thu 10/9

5:10 am-5:30 pm

1 stop9h 20m

$520

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 5/21

5:20 am-3:45 pm

2 stops13h 25m

Ontario

Fri 5/23

8:00 am-11:55 pm

2 stops12h 55m

$530

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 10/1

8:30 am-11:36 pm

2 stops18h 06m

Ontario

Thu 10/9

8:04 pm-1:45 pm

2 stops14h 41m

$595

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 5/3

11:55 am-9:25 pm

1 stop12h 30m

Ontario

Wed 5/7

10:59 pm-12:34 pm

1 stop10h 35m

$596

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 5/3

6:05 am-10:51 am

2 stops31h 46m

Ontario

Wed 5/7

6:00 am-5:12 am

2 stops20h 12m

$1,074

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 4/29

9:30 pm-11:20 am

2 stops16h 50m

$146

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 5/8

11:58 am-9:11 pm

1 stop12h 13m

$195

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Fri 5/9

2:55 pm-10:00 pm

1 stop10h 05m

$223

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 8/26

8:40 am-7:47 pm

1 stop14h 07m

$233

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 8/26

5:00 am-2:40 pm

2 stops12h 40m

$273

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 12 results
1
2

Compare providers for flights from Luis Munoz Marin Intl to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Luis Munoz Marin Intl to Ontario in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Juan Luis Munoz Marin Intl Airport-Ontario flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on San Juan Luis Munoz Marin Intl Airport-Ontario flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from San Juan Luis Munoz Marin Intl Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Juan Luis Munoz Marin Intl Airport-Ontario flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Juan Luis Munoz Marin Intl Airport-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Luis Munoz Marin Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Luis Munoz Marin Intl 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 Luis Munoz Marin Intl Airport to Ontario

What is the cheapest month to book a flight from San Juan Luis Munoz Marin Intl Airport to Ontario?

Currently, August is the cheapest month in which you can book a flight from San Juan Luis Munoz Marin Intl Airport to Ontario (average of $246). Flying from San Juan Luis Munoz Marin Intl Airport 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 Luis Munoz Marin Intl 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 17, 2025.

A simple way to save on the total cost of your ticket is to fly from San Juan Luis Munoz Marin Intl Airport 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 17, 2025.
Alaska Airlines
8.0
Very good
9,882 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

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
9,882 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

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
4,280 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

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
7,917 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

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
8,667 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

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
2,926 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

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 Luis Munoz Marin Intl 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 Luis Munoz Marin Intl?

    If you book a flight to Ontario from San Juan Luis Munoz Marin Intl, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 0 flights from San Juan Luis Munoz Marin Intl to Ontario per day from 3 different airlines.

  • What are the cheapest airlines flying from San Juan Luis Munoz Marin Intl Airport to Ontario round-trip?

    Our cheapest airline available from San Juan Luis Munoz Marin Intl Airport to Ontario is United Airlines. Our recent data shows that you can find tickets from as low as $520 on this airline. Additional options worth looking into are Southwest and American Airlines, starting at $530 and $595 round-trip. Users have found that United Airlines is 1% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from San Juan Luis Munoz Marin Intl Airport to Ontario one-way?

    The cheapest airlines for a one-way flight from San Juan Luis Munoz Marin Intl Airport to Ontario are Frontier ($146), JetBlue ($195), and United Airlines ($223).

  • Can I find deals for flights from Luis Munoz Marin Intl to Ontario that include hotel bookings?

    Yes. In addition to deals on Luis Munoz Marin Intl to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Luis Munoz Marin Intl to Ontario?

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

  • Can I find deals for business class flights from Luis Munoz Marin Intl to Ontario?

    Yes. Cheapflights offers flight deals from Luis Munoz Marin Intl 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 Luis Munoz Marin Intl Airport to Ontario?

    Currently, August is the cheapest month in which you can book a flight from San Juan Luis Munoz Marin Intl Airport to Ontario (average of $246). Flying from San Juan Luis Munoz Marin Intl Airport 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 Luis Munoz Marin Intl to Ontario

Discover the top 3 airlines that operate flights from Luis Munoz Marin Intl 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 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$344Average$664FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$347Average$480FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$390Average$654FlexibilityNo cancel feeOn-time69%

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