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San Luis Obispo

$178+ 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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SBP
Feb 5 — Feb 121
Thu 2/5
Thu 2/12
1 adult, Economy
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Cheap flight deals from Ontario to San Luis Obispo

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to San Luis Obispo (SBP). 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 January 6, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$264
(Alaska Airlines)

One-way from

$178
(Alaska Airlines)

Popular in

June

Cheapest in

November

Average price

$216
Provider with most accurate pricing for Ontario-San Luis Obispo County flight deals.
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Provider most trusted by Cheapflights users for Ontario-San Luis Obispo County flights.
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From Ontario to San Luis Obispo County
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One-way flight from Ontario to San Luis Obispo County
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Highest demand for flights based on searches. 13% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 6, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/5. 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.
Sat 1/317:00 amONT - SBP
1 stop9h 55mAlaska Airlines
Tue 2/36:17 pmSBP - ONT
1 stop20h 51mAlaska Airlines
Deal found 1/5$264
This Alaska Airlines deal was found by Cheapflights users on 1/6. 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.
Mon 2/26:00 amONT - SBP
1 stop11h 37mAlaska Airlines
Mon 2/96:17 pmSBP - ONT
1 stop26h 19mAlaska Airlines
Deal found 1/6$265
This United Airlines deal was found by Cheapflights users on 1/6. 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.
Fri 1/166:39 pmONT - SBP
1 stop5h 05mUnited Airlines
Mon 1/196:05 amSBP - ONT
1 stop5h 13mUnited Airlines
Deal found 1/6$269
This Alaska Airlines deal was found by Cheapflights users on 1/6. 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.
Wed 1/285:59 pmONT - SBP
1 stop22h 56mAlaska Airlines
Fri 1/306:17 pmSBP - ONT
1 stop26h 19mAlaska Airlines
Deal found 1/6$284
This Alaska Airlines deal was found by Cheapflights users on 1/5. 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.
Mon 1/266:00 amONT - SBP
1 stop11h 37mAlaska Airlines
Fri 1/306:17 pmSBP - ONT
1 stop26h 19mAlaska Airlines
Deal found 1/5$285
This United Airlines deal was found by Cheapflights users on 1/4. 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 1/81:53 pmONT - SBP
1 stop5h 51mUnited Airlines
Sat 1/106:05 amSBP - ONT
1 stop6h 12mUnited Airlines
Deal found 1/4$289
This Alaska Airlines deal was found by Cheapflights users on 1/6. 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.
Sat 4/47:00 amONT - SBP
1 stop10h 03mAlaska Airlines
Fri 4/105:43 pmSBP - ONT
1 stop26h 40mAlaska Airlines
Deal found 1/6$293
This United Airlines deal was found by Cheapflights users on 1/5. 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 2/126:10 amONT - SBP
1 stop4h 36mUnited Airlines
Sun 2/156:05 amSBP - ONT
1 stop6h 33mUnited Airlines
Deal found 1/5$299
This United Airlines deal was found by Cheapflights users on 1/4. 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.
Fri 1/231:53 pmONT - SBP
1 stop5h 51mUnited Airlines
Mon 1/266:05 amSBP - ONT
1 stop5h 13mUnited Airlines
Deal found 1/4$304
This United Airlines deal was found by Cheapflights users on 1/4. 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.
Sun 1/116:39 pmONT - SBP
1 stop5h 05mUnited Airlines
Sun 1/182:11 pmSBP - ONT
1 stop3h 32mUnited Airlines
Deal found 1/4$319

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to San Luis Obispo 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 January 6, 2026.
Use the filters below to find and compare flights from Ontario to San Luis Obispo that are best for you.

Fly from

Ontario

Fly to

San Luis Obispo

Route

Depart

Return

Price

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Sat 1/31

7:00 am-4:55 pm

1 stop9h 55m

San Luis Obispo County

Tue 2/3

6:17 pm-3:08 pm

1 stop20h 51m

$264

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Mon 2/2

6:00 am-5:37 pm

1 stop11h 37m

San Luis Obispo County

Mon 2/9

6:17 pm-8:36 pm

1 stop26h 19m

$265

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Fri 1/16

6:39 pm-11:44 pm

1 stop5h 05m

San Luis Obispo County

Mon 1/19

6:05 am-11:18 am

1 stop5h 13m

$269

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Tue 2/24

4:02 pm-6:53 pm

1 stop26h 51m

San Luis Obispo County

Fri 2/27

7:33 pm-11:32 pm

1 stop27h 59m

$284

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Wed 1/28

5:59 pm-4:55 pm

1 stop22h 56m

San Luis Obispo County

Fri 1/30

6:17 pm-8:36 pm

1 stop26h 19m

$284

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Mon 1/26

6:00 am-5:37 pm

1 stop11h 37m

San Luis Obispo County

Fri 1/30

6:17 pm-8:36 pm

1 stop26h 19m

$285

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Fri 1/9

6:39 pm-11:44 pm

1 stop5h 05m

San Luis Obispo County

Sun 1/11

6:05 am-11:18 am

1 stop5h 13m

$289

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Thu 2/12

1:50 pm-7:50 pm

1 stop6h 00m

San Luis Obispo County

Sun 2/15

6:05 am-12:38 pm

1 stop6h 33m

$299

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Wed 2/18

6:14 am-6:53 pm

1 stop12h 39m

$178

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Wed 2/4

4:03 pm-5:37 pm

1 stop25h 34m

$178

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 17 results
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 Ontario-San Luis Obispo flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-San Luis Obispo flight deals on Cheapflights vs. eDreams >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 $179). Flying from Ontario to San Luis Obispo in April is currently the most expensive (average of $211). 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.

Reviews of airlines servicing San Luis Obispo

Get insights into the airlines that provide service to San Luis Obispo. 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 San Luis Obispo. Reviews last updated January 6, 2026.
Peruse reviews from past customers who have flown with United Airlines from Ontario to San Luis Obispo to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,132 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.
United Airlines
7.4
Good
9,132 reviews
United Airlines
7.4
Good
9,132 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.

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.

  • How long is the flight from Ontario to San Luis Obispo?

    For as low as $269, Alaska Airlines can have you in San Luis Obispo from Ontario in 5h 05m. Airlines will cover a distance of 191 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Cheapflights users have booked flights from Ontario to San Luis Obispo round-trip from $218.

  • 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 $179). Flying from Ontario to San Luis Obispo in April is currently the most expensive (average of $211). 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

Traveling to a place near San Luis Obispo?

Book flights to San Luis Obispo if you plan to visit one of these locations
Morro Bay
Arroyo Grande
Avila Beach
San Simeon

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Top airline flying from Ontario to San Luis Obispo

Discover the top airline that operate flights from Ontario to San Luis Obispo. 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 January 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$218Average$368FlexibilityNo cancel feeOn-time69%

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