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San Luis Obispo

$182+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SBP
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
1 adult, Economy
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Cheap 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 March 16, 2026.

This United Airlines deal was found by Cheapflights users on 3/13. 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 4/36:00 am
ONT
-
SBP
1 stop4h 38m
United Airlines
Sun 4/56:15 am
SBP
-
ONT
1 stop3h 41m
United Airlines
Deal found 3/13$299
This Alaska Airlines deal was found by Cheapflights users on 3/14. 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 4/216:00 am
ONT
-
SBP
1 stop12h 42m
Alaska Airlines
Tue 4/287:20 am
SBP
-
ONT
1 stop15h 12m
Alaska Airlines
Deal found 3/14$303
This Alaska Airlines deal was found by Cheapflights users on 3/15. 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 5/53:26 pm
ONT
-
SBP
1 stop6h 52m
Alaska Airlines
Sat 5/95:36 pm
SBP
-
ONT
1 stop6h 12m
Alaska Airlines
Deal found 3/15$313
This United Airlines deal was found by Cheapflights users on 3/16. 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.
Fri 4/106:00 am
ONT
-
SBP
1 stop4h 38m
United Airlines
Sun 4/126:15 am
SBP
-
ONT
1 stop3h 41m
United Airlines
Deal found 3/16$324
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Wed 4/11:27 pm
ONT
-
SBP
1 stop4h 29m
United Airlines
Wed 4/86:15 am
SBP
-
ONT
1 stop6h 05m
United Airlines
Deal found 3/11$339
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Wed 4/16:49 pm
ONT
-
SBP
1 stop5h 10m
United Airlines
Sat 4/46:15 am
SBP
-
ONT
1 stop3h 38m
United Airlines
Deal found 3/12$344
This United Airlines deal was found by Cheapflights users on 3/16. 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 3/311:27 pm
ONT
-
SBP
1 stop4h 29m
United Airlines
Sat 4/42:12 pm
SBP
-
ONT
1 stop3h 35m
United Airlines
Deal found 3/16$345
This United Airlines deal was found by Cheapflights users on 3/12. 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 3/276:15 am
ONT
-
SBP
1 stop4h 23m
United Airlines
Tue 3/316:15 am
SBP
-
ONT
1 stop3h 41m
United Airlines
Deal found 3/12$349
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Sat 4/46:49 pm
ONT
-
SBP
1 stop5h 10m
United Airlines
Sun 4/58:02 am
SBP
-
ONT
1 stop4h 18m
United Airlines
Deal found 3/14$358
This United Airlines deal was found by Cheapflights users on 3/15. 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 4/246:00 am
ONT
-
SBP
1 stop4h 38m
United Airlines
Sat 4/252:12 pm
SBP
-
ONT
1 stop3h 35m
United Airlines
Deal found 3/15$359
This United Airlines deal was found by Cheapflights users on 3/11. 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 3/126:37 pm
ONT
-
SBP
1 stop5h 22m
United Airlines
Thu 3/196:15 am
SBP
-
ONT
1 stop6h 03m
United Airlines
Deal found 3/11$379

Find 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 March 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$299
(United Airlines)

One-way from

$182
(Alaska Airlines)

Popular in

June

Cheapest in

November

Average price

$239
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. 17% potential increase in price ($56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 16, 2026.
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

Cheapest round-trip

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Fri 4/10

1:27 pm-5:56 pm

1 stop4h 29m

San Luis Obispo County

Mon 4/13

6:15 am-9:56 am

1 stop3h 41m

$299

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Tue 5/5

6:00 am-10:18 pm

1 stop16h 18m

San Luis Obispo County

Sat 5/9

5:36 pm-11:48 pm

1 stop6h 12m

$313

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Tue 5/19

6:59 pm-11:59 pm

1 stop5h 00m

San Luis Obispo County

Sun 5/24

6:25 am-12:12 pm

1 stop5h 47m

$339
Quickest round-trip

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Wed 4/1

1:27 pm-5:56 pm

1 stop4h 29m

San Luis Obispo County

Sat 4/4

6:15 am-9:53 am

1 stop3h 38m

$339

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Thu 8/6

6:00 am-11:38 am

1 stop5h 38m

San Luis Obispo County

Mon 8/10

6:25 am-12:12 pm

1 stop5h 47m

$339

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Sat 4/4

6:49 pm-11:59 pm

1 stop5h 10m

San Luis Obispo County

Sun 4/5

6:15 am-9:56 am

1 stop3h 41m

$361

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Tue 5/5

6:59 pm-11:59 pm

1 stop5h 00m

San Luis Obispo County

Sat 5/9

5:00 am-5:52 pm

2 stops12h 52m

$389

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Wed 4/1

6:00 am-6:42 pm

1 stop12h 42m

San Luis Obispo County

Wed 4/8

3:12 pm-3:42 pm

2 stops24h 30m

$416

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Tue 4/7

6:25 pm-10:29 pm

2 stops28h 04m

San Luis Obispo County

Tue 4/14

7:34 pm-11:59 pm

1 stop28h 25m

$421

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Mon 4/20

7:00 am-5:03 pm

1 stop10h 03m

San Luis Obispo County

Wed 4/22

6:00 am-12:08 pm

2 stops30h 08m

$438

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 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 FlightHub the most. FlightHub 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 September is currently the most expensive (average of $209). 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 March 16, 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
9,428 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

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
9,428 reviews
United Airlines
7.4
Good
9,428 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

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 $299, United Airlines can have you in San Luis Obispo from Ontario in 4h 29m. 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 September is currently the most expensive (average of $209). 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 March 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$218Average$368FlexibilityNo cancel feeOn-time69%

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