HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Luis Obispo

$128+ 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 1/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SBP
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to San Luis Obispo 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.

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 December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/15. 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.
Tue 12/161:50 pmONT - SBP
1 stop6h 05mUnited Airlines
Sat 12/206:23 pmSBP - ONT
1 stop4h 18mUnited Airlines
Deal found 12/15$289
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:39 pmONT - SBP
1 stop5h 05mUnited Airlines
Thu 12/252:21 pmSBP - ONT
1 stop3h 30mUnited Airlines
Deal found 12/17$339
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/196:39 pmONT - SBP
1 stop5h 05mUnited Airlines
Sun 12/216:23 pmSBP - ONT
1 stop4h 18mUnited Airlines
Deal found 12/17$349
This United Airlines deal was found by Cheapflights users on 12/18. 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 12/276:00 amONT - SBP
1 stop6h 03mUnited Airlines
Sun 12/282:21 pmSBP - ONT
1 stop3h 22mUnited Airlines
Deal found 12/18$454
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/266:00 amONT - SBP
1 stop6h 03mUnited Airlines
Mon 12/295:28 amSBP - ONT
1 stop4h 33mUnited Airlines
Deal found 12/16$483
This American Airlines deal was found by Cheapflights users on 12/18. 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.
Sat 12/279:53 amONT - SBP
2 stops13h 42mAmerican Airlines
Sun 12/286:00 amSBP - ONT
1 stop5h 53mAmerican Airlines
Deal found 12/18$1,838
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:17 amONT - SBP
2 stops17h 01mAmerican Airlines
Sat 12/206:54 pmSBP - ONT
1 stop16h 59mAmerican Airlines
Deal found 12/15$1,930
This American Airlines deal was found by Cheapflights users on 12/17. 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.
Fri 12/199:53 amONT - SBP
2 stops13h 42mAmerican Airlines
Mon 12/226:54 pmSBP - ONT
1 stop16h 59mAmerican Airlines
Deal found 12/17$2,015

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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$239
(United Airlines)

One-way from

$128
(Alaska Airlines)

Popular in

June

Cheapest in

November

Average price

$320
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. 11% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 18, 2025.
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

Thu 1/8

6:00 am-11:47 am

1 stop5h 47m

San Luis Obispo County

Mon 1/12

6:05 am-11:18 am

1 stop5h 13m

$239

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

$244

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Fri 2/27

1:50 pm-7:50 pm

1 stop6h 00m

San Luis Obispo County

Sat 2/28

8:20 am-12:47 pm

1 stop4h 27m

$244

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Fri 2/6

6:39 pm-11:44 pm

1 stop5h 05m

San Luis Obispo County

Mon 2/9

2:21 pm-5:43 pm

1 stop3h 22m

$244

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Thu 1/1

8:11 am-12:03 pm

1 stop3h 52m

San Luis Obispo County

Mon 1/5

6:23 pm-10:41 pm

1 stop4h 18m

$249

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Wed 3/11

6:14 am-6:53 pm

1 stop12h 39m

San Luis Obispo County

Fri 3/13

7:33 pm-11:32 pm

1 stop27h 59m

$264

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Sat 1/10

1:53 pm-7:44 pm

1 stop5h 51m

San Luis Obispo County

Sun 1/11

2:21 pm-5:43 pm

1 stop3h 22m

$299

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Fri 1/16

6:39 pm-11:44 pm

1 stop5h 05m

San Luis Obispo County

Sun 1/25

5:00 am-12:47 pm

1 stop7h 47m

$299

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Fri 2/6

4:03 pm-5:37 pm

1 stop25h 34m

San Luis Obispo County

Mon 2/9

3:12 pm-7:16 pm

2 stops28h 04m

$350

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Fri 2/27

7:37 pm-11:39 am

2 stops16h 02m

San Luis Obispo County

Sat 2/28

3:47 pm-6:57 pm

2 stops27h 10m

$375

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 18 results
1
2

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 December.
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, February 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 January is currently the most expensive (average of $249). 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 December 18, 2025.
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
9,091 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

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
9,091 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

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 $239, United Airlines can have you in San Luis Obispo from Ontario in 5h 47m. 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, February 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 January is currently the most expensive (average of $249). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to San Luis Obispo

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Las Vegas flights
Los Angeles to Las Vegas flights
Los Angeles to San Francisco flights
Burbank to Las Vegas flights
Santa Ana to Las Vegas flights
San Francisco to Los Angeles flights
San Jose to Las Vegas flights
Ontario to San Francisco flights
San Jose to Los Angeles flights
San Francisco to Ontario flights
Oakland to Las Vegas flights
San Francisco to San Diego flights
Los Angeles to San Jose flights
Santa Ana to San Francisco flights
Sacramento to Las Vegas flights
San Francisco to Santa Ana flights
Ontario to Las Vegas flights
San Francisco to Palm Springs flights
San Diego to Las Vegas flights
San Diego to San Francisco flights
Los Angeles to Sacramento flights
Sacramento to Los Angeles flights
Las Vegas to Los Angeles flights
Los Angeles to Reno flights
San Jose to San Diego flights
Las Vegas to Burbank flights
San Jose to Ontario flights
Ontario to San Jose flights
San Francisco to Burbank flights
San Jose to Santa Ana flights
Santa Ana to San Jose flights
Las Vegas to Santa Ana flights
Sacramento to Ontario flights
Burbank to San Francisco flights
Ontario to Sacramento flights
Fresno to Las Vegas flights
Las Vegas to San Francisco flights
Los Angeles to Oakland flights
Stockton to Las Vegas flights
Oakland to San Diego flights
Reno to Las Vegas flights
Burbank to Reno flights
Reno to Los Angeles flights
Santa Rosa to Las Vegas flights
Long Beach to Las Vegas flights
San Francisco to Long Beach flights
Las Vegas to San Diego flights
Santa Ana to Reno flights
Sacramento to Santa Ana flights
Santa Rosa to San Diego flights

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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$218Average$368FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.