What are the cheapest airlines flying from Ontario to San Luis Obispo round-trip?

Cheapflights users have booked flights from Ontario to San Luis Obispo round-trip from $288. Other airlines that can offer you cheap pricing are Alaska Airlines, from $363, and American Airlines, from $644. United Airlines is priced at 23% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Ontario to San Luis Obispo one-way?

The cheapest airlines for a one-way flight from Ontario to San Luis Obispo are Alaska Airlines ($172), Hawaiian Airlines ($214), and United Airlines ($235).

What is the cheapest day to fly from Ontario to San Luis Obispo?

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

What is the cheapest day to fly round-trip from Ontario to San Luis Obispo?

Users have found that flying from Ontario to San Luis Obispo on a Sunday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

What is the cheapest month to fly from Ontario to San Luis Obispo?

Our data shows that August tends to be the cheapest month to fly to San Luis Obispo from Ontario. Users have commonly found prices around $290 for the month, but tickets can be as low as $178. Due to multiple factors, prepare for potentially higher prices in September.

Most accurate provider : When it comes to deals on Ontario-San Luis Obispo flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-San Luis Obispo flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-San Luis Obispo flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ontario-San Luis Obispo flights, Cheapflights users trust eDreams the most. eDreams 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 Ontario-San Luis Obispo flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Ontario to San Luis Obispo that include hotel bookings?

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

How can I find direct flights from Ontario to San Luis Obispo?

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

Can I find deals for business class flights from Ontario to San Luis Obispo?

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

$172+ Flights from Ontario to San Luis Obispo

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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.

Cheap flight deals from Ontario to San Luis Obispo

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$288 (United Airlines)
One-way from	$172 (SmartFares)
Popular in	January
Cheapest in	December
Average price	$278

Provider with most accurate pricing for Ontario-San Luis Obispo County flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ontario-San Luis Obispo County flights.

Search Deals

From Ontario to San Luis Obispo County

Search Deals

One-way flight from Ontario to San Luis Obispo County

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($59 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

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Find flight deals from Ontario to San Luis Obispo

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

Fri 5/96:00 amONT - SBP

1 stop3h 52mUnited Airlines

Mon 5/122:45 pmSBP - ONT

1 stop3h 16mUnited Airlines

Deal found 4/16

$288

Tue 5/68:59 pmONT - SBP

1 stop18h 22mAlaska Airlines

Wed 5/77:14 pmSBP - ONT

1 stop28h 45mAlaska Airlines

Deal found 4/16

$363

Sat 6/1412:55 pmONT - SBP

1 stop9h 40mAmerican Airlines

Sun 6/1512:35 pmSBP - ONT

1 stop9h 03mAmerican Airlines

Deal found 4/15

$644

Best flights from Ontario to San Luis Obispo
Discover carefully curated flight deals from Ontario to San Luis Obispo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 17, 2025.

Fri 5/96:00 amONT - SBP

1 stop3h 52mUnited Airlines

Mon 5/122:45 pmSBP - ONT

1 stop3h 16mUnited Airlines

Deal found 4/16

$288

Tue 5/68:59 pmONT - SBP

1 stop18h 22mAlaska Airlines

Wed 5/77:14 pmSBP - ONT

1 stop28h 45mAlaska Airlines

Deal found 4/16

$363

Sat 6/1412:55 pmONT - SBP

1 stop9h 40mAmerican Airlines

Sun 6/1512:35 pmSBP - ONT

1 stop9h 03mAmerican Airlines

Deal found 4/15

$644

Last-minute flights from Ontario to San Luis Obispo
Discover last-minute flight deals from Ontario to San Luis Obispo. Data last updated April 17, 2025 and is based on user searches.

Tue 4/223:55 pmONT - SBP

1 stop4h 20mUnited Airlines

Fri 4/252:43 pmSBP - ONT

1 stop20h 22mUnited Airlines

Deal found 4/15

$447

Tue 4/227:25 pmONT - SBP

2 stops18h 27mAmerican Airlines

Fri 4/254:30 pmSBP - ONT

1 stop16h 31mAmerican Airlines

Deal found 4/15

$1,751

Tue 5/68:59 pmONT - SBP

1 stop18h 22mAlaska Airlines

Wed 5/77:14 pmSBP - ONT

1 stop28h 45mAlaska Airlines

Deal found 4/16

$363

Fri 5/96:00 amONT - SBP

1 stop3h 52mUnited Airlines

Mon 5/122:45 pmSBP - ONT

1 stop3h 16mUnited Airlines

Deal found 4/16

$288

One-way flights from Ontario to San Luis Obispo
Search for one-way flight options from Ontario to San Luis Obispo. Find affordable one-way fares based on user searches. Data last updated April 17, 2025.

Wed 5/77:00 amONT - SBP

1 stop8h 21mAlaska Airlines

Deal found 4/16

$172

Wed 5/78:59 pmONT - SBP

1 stop18h 22mHawaiian Airlines

Deal found 4/16

$214

Sun 6/16:00 amONT - SBP

1 stop5h 56mUnited Airlines

Deal found 4/16

$235

Wed 6/111:36 pmONT - SBP

2 stops8h 39mMultiple Airlines

Deal found 4/16

$540

Fri 4/2510:00 amONT - SBP

2 stops12h 20mAmerican Airlines

Deal found 4/16

$1,235

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to San Luis Obispo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Fri 5/9

6:00 am-9:52 am

1 stop3h 52m

San Luis Obispo County

Mon 5/12

2:45 pm-6:01 pm

1 stop3h 16m

$288

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Tue 5/6

8:59 pm-3:21 pm

1 stop18h 22m

San Luis Obispo County

Wed 5/7

7:14 pm-11:59 pm

1 stop28h 45m

$363

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Sat 6/14

12:55 pm-10:35 pm

1 stop9h 40m

San Luis Obispo County

Sun 6/15

12:35 pm-9:38 pm

1 stop9h 03m

$644

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Wed 5/7

7:00 am-3:21 pm

1 stop8h 21m

$172

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Wed 5/7

8:59 pm-3:21 pm

1 stop18h 22m

$214

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Sun 6/1

6:00 am-11:56 am

1 stop5h 56m

$235

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Wed 6/11

1:36 pm-10:15 pm

2 stops8h 39m

$540

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Fri 4/25

10:00 am-10:20 pm

2 stops12h 20m

$1,235

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Compare providers for flights from Ontario to San Luis Obispo

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to San Luis Obispo in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust 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 Ontario-San Luis Obispo flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-San Luis Obispo flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-San Luis Obispo flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ontario-San Luis Obispo flights, Cheapflights users trust eDreams the most. eDreams 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 Ontario-San Luis Obispo 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 Ontario to San Luis Obispo

Have a flexible travel schedule? Discover the best time to fly to San Luis Obispo 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 Luis Obispo

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

Currently, January is the cheapest month in which you can book a flight from Ontario to San Luis Obispo (average of $374). Flying from Ontario to San Luis Obispo in June is currently the most expensive (average of $594). 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 SBP?

It’s typically best to fly out from Ontario to San Luis Obispo in the morning. Doing so could potentially save you 38% on the flight price compared to flying at noon, which is usually more expensive.

Rainfall in San Luis Obispo by month

In terms of precipitation, rainfall in San Luis Obispo ranges from 0.0 - 4.0 inches per month. December is typically the wettest month, when rainfall can reach 4.0 in. July is typically the driest time to visit San Luis Obispo when rainfall is around 0.0 in.

Temperature in San Luis Obispo by month

If weather is an important factor for your trip to San Luis Obispo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Luis Obispo

To help decide which airline to fly from Ontario to San Luis Obispo, see what other customers have to say about Alaska Airlines, Hawaiian Airlines and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,882 reviews

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

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

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

Hawaiian Airlines

7.9

Good

2,382 reviews

Alaska Airlines

8.0

Very good

9,882 reviews

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

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

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

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,882 reviews

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

What are the cheapest airlines flying from Ontario to San Luis Obispo round-trip?
Cheapflights users have booked flights from Ontario to San Luis Obispo round-trip from $288. Other airlines that can offer you cheap pricing are Alaska Airlines, from $363, and American Airlines, from $644. United Airlines is priced at 23% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Ontario to San Luis Obispo one-way?
The cheapest airlines for a one-way flight from Ontario to San Luis Obispo are Alaska Airlines ($172), Hawaiian Airlines ($214), and United Airlines ($235).
Can I find deals for flights from Ontario to San Luis Obispo that include hotel bookings?
Yes. In addition to deals on Ontario to San Luis Obispo flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to San Luis Obispo?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Luis Obispo.
Can I find deals for business class flights from Ontario to San Luis Obispo?
Yes. Cheapflights offers flight deals from Ontario to San Luis Obispo 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 Luis Obispo?
Currently, January is the cheapest month in which you can book a flight from Ontario to San Luis Obispo (average of $374). Flying from Ontario to San Luis Obispo in June is currently the most expensive (average of $594). 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

Morro Bay

Arroyo Grande

Avila Beach

San Simeon

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Top airline flying from Ontario to San Luis Obispo

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$218	Average$289	FlexibilityNo cancel fee	On-time69%

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$172+ Cheap flights from Ontario to San Luis Obispo (ONT - SBP)

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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to San Luis Obispo with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to San Luis Obispo

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to San Luis Obispo

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

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

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to San Luis Obispo that are best for you.

Compare providers for flights from Ontario to San Luis Obispo

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 Ontario to San Luis Obispo in April.

Best time to book a flight from Ontario to San Luis Obispo

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

Cheapflights Insights

Everything you need to know about your flight from Ontario to San Luis Obispo

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

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

Find hourly flight availability from Ontario to San Luis Obispo. 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.

Rainfall in San Luis Obispo by month

Plan your trip to San Luis Obispo by taking into account the average rainfall totals by month.

Temperature in San Luis Obispo by month

Plan your trip to San Luis Obispo by taking into account the average temperature totals by month.

Reviews of airlines servicing San Luis Obispo

To help decide which airline to fly from Ontario to San Luis Obispo, see what other customers have to say about Alaska Airlines, Hawaiian Airlines and United Airlines. You can also see how each airline stacks up 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 San Luis Obispo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from Ontario to San Luis Obispo round-trip?

What are the cheapest airlines to fly from Ontario to San Luis Obispo one-way?

Can I find deals for flights from Ontario to San Luis Obispo that include hotel bookings?

How can I find direct flights from Ontario to San Luis Obispo?

Can I find deals for business class flights from Ontario to San Luis Obispo?

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

Traveling to a place near Ontario?

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Alternative routes for Ontario to San Luis Obispo

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Top airline flying from Ontario to San Luis Obispo

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