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

Cheapflights users have booked flights from Ontario to San Juan Luis Munoz Marin Intl Airport round-trip from $365. Other airlines that can offer you cheap pricing are JetBlue, from $410, and United Airlines, from $455. Delta is currently priced 36% below the average price you’ll pay for this route.

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

The cheapest airlines for a one-way flight from Ontario to San Juan Luis Munoz Marin Intl Airport are JetBlue ($205), United Airlines ($228), and Southwest ($283).

What is the cheapest day to fly from Ontario to San Juan Luis Munoz Marin Intl Airport?

Travelers seeking maximum savings on their Ontario to San Juan Luis Munoz Marin Intl Airport flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in San Juan Luis Munoz Marin Intl Airport ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan Luis Munoz Marin Intl Airport when rainfall is around 2.2 in.

If weather is an important factor for your trip to San Juan Luis Munoz Marin Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

What are the most popular airlines that fly from Ontario to San Juan Luis Munoz Marin Intl Airport?

When booking a flight from Ontario to San Juan Luis Munoz Marin Intl Airport, you may want to consider flying on American Airlines, Delta or Frontier as they are the most popular for this route.

What is the cheapest day to fly round-trip from Ontario to San Juan Luis Munoz Marin Intl Airport?

Departing on a Monday is a good option for securing a great price. You can expect to save up to 62% when planning your travel around this day of the week.

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

October is one of the best times of the year to fly to San Juan Luis Munoz Marin Intl Airport from Ontario. Prices for October average $466 per person but you can even find prices for as low as $227. The most expensive prices can be found in the month of December. Opting for a October flight can save you 42% on your journey compared to booking in December

What airport do you fly from for flights from Ontario to San Juan Luis Munoz Marin Intl?

Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to San Juan Luis Munoz Marin Intl. 5 airlines have flights from Ontario to San Juan Luis Munoz Marin Intl on a regular basis. Booking flights from Ontario to San Juan Luis Munoz Marin Intl should not be difficult; the airport handles an average of 0 outbound flights to San Juan Luis Munoz Marin Intl per day.

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

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

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

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

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

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

$202+ Flights from Ontario to San Juan Luis Munoz Marin Intl Airport

Q: How far in advance should I book a flight from Ontario to San Juan Luis Munoz Marin Intl Airport?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 14 days in advance, which can save you up to 44% on flights from Ontario to San Juan Luis Munoz Marin Intl Airport compared to booking the week you need them. Waiting 14 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $352. For sooner than that we have options available in the next 3 days from $590.

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Find cheap flights from Ontario to Luis Munoz Marin Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Ontario to San Juan Luis Munoz Marin Intl are usually found in September or October, booked 24 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from Ontario to Luis Munoz Marin Intl

Round-trip from	$365 (Delta)
One-way from	$202 (Trip.com)
Popular in	December
Cheapest in	September
Average price	$669

From Ontario to San Juan Luis Munoz Marin Intl

Search Deals

One-way flight from Ontario to San Juan Luis Munoz Marin Intl

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($46 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

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Find flight deals from Ontario to Luis Munoz Marin Intl

Cheapest flights from Ontario to Luis Munoz Marin Intl
Explore the most affordable flight options available from Ontario to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

Sat 8/307:05 amONT - SJU

1 stop12h 02mDelta

Wed 9/37:30 amSJU - ONT

2 stops18h 10mDelta

Deal found 6/30

$365

Fri 10/310:56 pmONT - SJU

1 stop11h 49mJetBlue

Tue 10/712:50 pmSJU - ONT

1 stop11h 39mJetBlue

Deal found 6/30

$410

Fri 9/265:05 amONT - SJU

1 stop9h 25mUnited Airlines

Thu 10/27:00 amSJU - ONT

2 stops13h 23mUnited Airlines

Deal found 6/29

$455

Fri 8/2911:59 pmONT - SJU

1 stop20h 11mAmerican Airlines

Fri 9/53:05 pmSJU - ONT

2 stops21h 16mAmerican Airlines

Deal found 6/30

$462

Sun 10/129:55 amONT - SJU

2 stops11h 55mSouthwest

Sat 10/1810:40 amSJU - ONT

2 stops12h 15mSouthwest

Deal found 6/29

$555

Best flights from Ontario to Luis Munoz Marin Intl
Discover carefully curated flight deals from Ontario to Luis Munoz Marin Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 2, 2025.

Sat 8/307:05 amONT - SJU

1 stop12h 02mDelta

Wed 9/37:30 amSJU - ONT

2 stops18h 10mDelta

Deal found 6/30

$365

Fri 10/310:56 pmONT - SJU

1 stop11h 49mJetBlue

Tue 10/712:50 pmSJU - ONT

1 stop11h 39mJetBlue

Deal found 6/30

$410

Fri 9/265:05 amONT - SJU

1 stop9h 25mUnited Airlines

Thu 10/22:00 pmSJU - ONT

1 stop9h 24mUnited Airlines

Deal found 6/29

$455

Fri 8/2911:59 pmONT - SJU

1 stop20h 11mAmerican Airlines

Fri 9/53:05 pmSJU - ONT

2 stops21h 16mAmerican Airlines

Deal found 6/30

$462

Sun 10/129:55 amONT - SJU

2 stops11h 55mSouthwest

Sat 10/1810:40 amSJU - ONT

2 stops12h 15mSouthwest

Deal found 6/29

$555

Last-minute flights from Ontario to Luis Munoz Marin Intl
Discover last-minute flight deals from Ontario to Luis Munoz Marin Intl. Data last updated July 2, 2025 and is based on user searches.

Tue 7/812:55 pmONT - SJU

2 stops13h 11mAmerican Airlines

Thu 8/76:00 amSJU - ONT

2 stops15h 17mAmerican Airlines

Deal found 6/30

$531

Tue 7/811:59 pmONT - SJU

1 stop12h 13mJetBlue

Thu 8/710:35 amSJU - ONT

1 stop14h 35mJetBlue

Deal found 7/1

$600

Tue 7/85:05 amONT - SJU

1 stop9h 25mUnited Airlines

Mon 7/212:05 amSJU - ONT

2 stops23h 47mUnited Airlines

Deal found 6/30

$699

Thu 7/107:35 pmONT - SJU

2 stops11h 50mSouthwest

Mon 7/142:40 pmSJU - ONT

2 stops12h 15mSouthwest

Deal found 6/30

$695

Thu 7/104:00 pmONT - SJU

2 stops28h 25mAlaska Airlines

Mon 7/146:15 amSJU - ONT

2 stops31h 50mAlaska Airlines

Deal found 7/2

$1,251

Sat 7/127:05 amONT - SJU

1 stop12h 18mDelta

Sat 7/197:30 amSJU - ONT

2 stops11h 14mDelta

Deal found 7/1

$1,595

Tue 7/1511:59 pmONT - SJU

1 stop12h 13mJetBlue

Thu 7/171:50 pmSJU - ONT

1 stop11h 09mJetBlue

Deal found 7/1

$534

Sat 8/165:05 amONT - SJU

1 stop9h 25mUnited Airlines

Thu 8/217:00 amSJU - ONT

2 stops13h 37mUnited Airlines

Deal found 6/30

$455

Fri 8/2911:59 pmONT - SJU

1 stop20h 11mAmerican Airlines

Fri 9/53:05 pmSJU - ONT

2 stops21h 16mAmerican Airlines

Deal found 6/30

$462

Sat 8/307:05 amONT - SJU

1 stop12h 02mDelta

Sat 9/612:50 pmSJU - ONT

1 stop9h 21mDelta

Deal found 6/30

$365

One-way flights from Ontario to Luis Munoz Marin Intl
Search for one-way flight options from Ontario to Luis Munoz Marin Intl. Find affordable one-way fares based on user searches. Data last updated July 2, 2025.

Fri 8/18:09 pmONT - SJU

1 stop25h 13mMultiple Airlines

Deal found 6/29

$202

Mon 9/2910:56 pmONT - SJU

1 stop10h 44mJetBlue

Deal found 6/30

$205

Mon 9/156:04 amONT - SJU

1 stop11h 34mUnited Airlines

Deal found 6/29

$228

Thu 8/218:40 pmONT - SJU

2 stops10h 35mSouthwest

Deal found 6/30

$283

Wed 8/206:17 amONT - SJU

2 stops12h 13mAmerican Airlines

Deal found 7/2

$298

Wed 8/207:05 amONT - SJU

1 stop12h 02mDelta

Deal found 6/30

$338

Thu 8/2111:25 pmONT - SJU

3 stops33h 30mAvianca

Deal found 6/30

$557

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 8/30

7:05 am-10:07 pm

1 stop12h 02m

San Juan Luis Munoz Marin Intl

Wed 9/3

7:30 am-10:40 pm

2 stops18h 10m

$365

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 9/26

5:05 am-5:30 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Thu 10/2

7:00 am-5:23 pm

2 stops13h 23m

$455

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 8/29

11:59 pm-11:10 pm

1 stop20h 11m

San Juan Luis Munoz Marin Intl

Fri 9/5

3:05 pm-9:21 am

2 stops21h 16m

$462

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 9/16

10:56 pm-2:54 pm

1 stop12h 58m

San Juan Luis Munoz Marin Intl

Fri 9/26

12:50 pm-9:29 pm

1 stop11h 39m

$502

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 8/1

8:09 pm-12:22 am

1 stop25h 13m

$202

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 9/29

10:56 pm-12:40 pm

1 stop10h 44m

$205

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 9/15

6:38 pm-12:00 pm

2 stops14h 22m

$228

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Thu 8/21

8:40 pm-10:15 am

2 stops10h 35m

$283

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 8/20

6:17 am-9:30 pm

2 stops12h 13m

$298

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 8/20

7:05 am-10:07 pm

1 stop12h 02m

$338

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Showing 1-10 of 11 results

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

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

How far ahead should I book a flight from Ontario to San Juan Luis Munoz Marin Intl Airport?

The best time to book flights from Ontario to San Juan Luis Munoz Marin Intl Airport is 24 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, September is the cheapest month in which you can book a flight from Ontario to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Ontario to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $339). 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 ONT to SJU?

One of the essential ways to save on airfare from Ontario to San Juan Luis Munoz Marin Intl Airport is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 27% on airfare.

Reviews of airlines servicing Luis Munoz Marin Intl

See what other customers who have flown with Southwest, Delta, and United Airlines from Ontario to San Juan Luis Munoz Marin Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,272 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Southwest

8.0

Very good

4,272 reviews

Southwest

8.0

Very good

4,272 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Delta

8.0

Very good

7,983 reviews

Southwest

8.0

Very good

4,272 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

United Airlines

7.4

Good

8,861 reviews

Southwest

8.0

Very good

4,272 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

JetBlue

7.3

Good

2,918 reviews

Southwest

8.0

Very good

4,272 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,272 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Related info for your journey

What airport do you fly from for flights from Ontario to San Juan Luis Munoz Marin Intl?
Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to San Juan Luis Munoz Marin Intl. 5 airlines have flights from Ontario to San Juan Luis Munoz Marin Intl on a regular basis. Booking flights from Ontario to San Juan Luis Munoz Marin Intl should not be difficult; the airport handles an average of 0 outbound flights to San Juan Luis Munoz Marin Intl per day.
What are the cheapest airlines flying from Ontario to San Juan Luis Munoz Marin Intl Airport round-trip?
Cheapflights users have booked flights from Ontario to San Juan Luis Munoz Marin Intl Airport round-trip from $365. Other airlines that can offer you cheap pricing are JetBlue, from $410, and United Airlines, from $455. Delta is currently priced 36% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Ontario to San Juan Luis Munoz Marin Intl Airport one-way?
The cheapest airlines for a one-way flight from Ontario to San Juan Luis Munoz Marin Intl Airport are JetBlue ($205), United Airlines ($228), and Southwest ($283).
Can I find deals for flights from Ontario to Luis Munoz Marin Intl that include hotel bookings?
Yes. In addition to deals on Ontario to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Luis Munoz Marin Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Luis Munoz Marin Intl.
Can I find deals for business class flights from Ontario to Luis Munoz Marin Intl?
Yes. Cheapflights offers flight deals from Ontario to Luis Munoz Marin Intl 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 Ontario to San Juan Luis Munoz Marin Intl Airport?
Currently, September is the cheapest month in which you can book a flight from Ontario to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Ontario to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $339). 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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Fajardo

Luquillo

Rio Grande

Humacao

Bayamón

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Top 5 airlines flying from Ontario to Luis Munoz Marin Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$73	Average$383	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$353	Average$608	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$355	Average$534	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$366	Average$585	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$409	Average$575	FlexibilityNo cancel fee	On-time63%

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$202+ Cheap flights from Ontario (ONT) to Luis Munoz Marin Intl (SJU)

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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Luis Munoz Marin Intl with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Ontario to San Juan Luis Munoz Marin Intl are usually found in September or October, booked 24 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from Ontario to Luis Munoz Marin Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Luis Munoz Marin Intl

Cheapest flights from Ontario to Luis Munoz Marin IntlExplore the most affordable flight options available from Ontario to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

Explore the most affordable flight options available from Ontario to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to San Juan Luis Munoz Marin Intl Airport that are best for you.

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

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to San Juan Luis Munoz Marin Intl Airport

How far ahead should I book a flight from Ontario to San Juan Luis Munoz Marin Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Luis Munoz Marin Intl. Price data was last updated on June 27, 2025.

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

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

Find hourly flight availability from Ontario to Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 2, 2025.

Reviews of airlines servicing Luis Munoz Marin Intl

See what other customers who have flown with Southwest, Delta, and United Airlines from Ontario to San Juan Luis Munoz Marin Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Luis Munoz Marin Intl. 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 from for flights from Ontario to San Juan Luis Munoz Marin Intl?

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

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

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

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

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

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

Traveling to a place near Ontario?

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Alternative routes for Ontario to Luis Munoz Marin Intl

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Top 5 airlines flying from Ontario to Luis Munoz Marin Intl

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Cheapest flights from Ontario to Luis Munoz Marin Intl
Explore the most affordable flight options available from Ontario to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.