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San Luis Obispo

$229+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SBP
Aug 17 — Aug 241
Mon 8/17
Mon 8/24
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 July 18, 2026.

This United Airlines deal was found by Cheapflights users on 7/14. 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.
Mon 8/176:08 am
ONT
-
SBP
1 stop5h 45m
United Airlines
Thu 8/272:20 pm
SBP
-
ONT
1 stop5h 41m
United Airlines
Deal found 7/14$279
This United Airlines deal was found by Cheapflights users on 7/14. 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 8/11:50 pm
ONT
-
SBP
1 stop6h 04m
United Airlines
Wed 8/52:06 pm
SBP
-
ONT
1 stop3h 48m
United Airlines
Deal found 7/14$294
This United Airlines deal was found by Cheapflights users on 7/16. 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 7/171:50 pm
ONT
-
SBP
1 stop5h 57m
United Airlines
Fri 7/246:25 am
SBP
-
ONT
1 stop5h 47m
United Airlines
Deal found 7/16$339
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Sat 10/311:13 pm
ONT
-
SBP
1 stop7h 59m
United Airlines
Tue 11/36:40 pm
SBP
-
ONT
1 stop4h 13m
United Airlines
Deal found 7/13$349
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Thu 8/66:00 am
ONT
-
SBP
1 stop5h 38m
United Airlines
Sun 8/97:04 pm
SBP
-
ONT
1 stop5h 23m
United Airlines
Deal found 7/13$364
This United Airlines deal was found by Cheapflights users on 7/13. 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.
Mon 7/206:39 pm
ONT
-
SBP
1 stop3h 33m
United Airlines
Mon 7/276:25 am
SBP
-
ONT
1 stop5h 47m
United Airlines
Deal found 7/13$389
This United Airlines deal was found by Cheapflights users on 7/15. 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.
Thu 7/236:00 am
ONT
-
SBP
1 stop5h 38m
United Airlines
Sat 7/252:06 pm
SBP
-
ONT
1 stop4h 27m
United Airlines
Deal found 7/15$399
This United Airlines deal was found by Cheapflights users on 7/14. 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.
Wed 7/155:00 am
ONT
-
SBP
1 stop8h 09m
United Airlines
Wed 7/226:25 am
SBP
-
ONT
1 stop5h 47m
United Airlines
Deal found 7/14$414
This United Airlines deal was found by Cheapflights users on 7/15. 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 7/171:18 pm
ONT
-
SBP
1 stop7h 32m
United Airlines
Mon 7/206:25 am
SBP
-
ONT
1 stop5h 47m
United Airlines
Deal found 7/15$419
This United Airlines deal was found by Cheapflights users on 7/14. 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.
Thu 7/161:50 pm
ONT
-
SBP
1 stop5h 57m
United Airlines
Sun 7/196:25 am
SBP
-
ONT
1 stop5h 47m
United Airlines
Deal found 7/14$429
This Booking.com deal was found by Cheapflights users on 7/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/254:27 pm
ONT
-
SBP
2 stops31h 23m
Alaska Airlines
Fri 8/283:24 pm
SBP
-
ONT
2 stops24h 28m
Alaska Airlines
Deal found 7/14$455
This United Airlines deal was found by Cheapflights users on 7/14. 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.
Mon 9/79:01 am
ONT
-
SBP
1 stop6h 20m
United Airlines
Wed 9/92:10 pm
SBP
-
ONT
1 stop5h 51m
United Airlines
Deal found 7/14$457

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 July 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$279
(United Airlines)

One-way from

$229
(United Airlines)

Popular in

April

Cheapest in

December

Average price

$289
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. 33% potential increase in price ($222 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 14% potential price decrease ($54 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 18, 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

Mon 8/17

6:08 am-11:53 am

1 stop5h 45m

San Luis Obispo County

Thu 8/27

2:20 pm-8:01 pm

1 stop5h 41m

$279

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Sat 9/5

1:18 pm-9:00 pm

1 stop7h 42m

San Luis Obispo County

Mon 9/7

2:20 pm-6:11 pm

1 stop3h 51m

$349

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Sat 8/22

11:00 am-5:45 pm

1 stop6h 45m

San Luis Obispo County

Sun 8/23

2:20 pm-6:11 pm

1 stop3h 51m

$349

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Fri 8/21

9:01 am-3:21 pm

1 stop6h 20m

San Luis Obispo County

Mon 8/24

8:00 am-12:12 pm

1 stop4h 12m

$349

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Sat 8/15

11:00 am-5:45 pm

1 stop6h 45m

San Luis Obispo County

Mon 8/17

8:00 am-12:12 pm

1 stop4h 12m

$349

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Thu 8/6

6:00 am-11:38 am

1 stop5h 38m

San Luis Obispo County

Sun 8/9

7:04 pm-12:27 am

1 stop5h 23m

$364
Quickest round-trip

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Mon 7/20

6:39 pm-10:12 pm

1 stop3h 33m

San Luis Obispo County

Mon 7/27

6:25 am-12:12 pm

1 stop5h 47m

$389

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Wed 7/22

1:50 pm-7:47 pm

1 stop5h 57m

San Luis Obispo County

Wed 7/29

12:42 pm-8:42 pm

1 stop8h 00m

$389

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Thu 7/23

6:00 am-11:38 am

1 stop5h 38m

San Luis Obispo County

Sat 7/25

2:06 pm-6:33 pm

1 stop4h 27m

$399

OntarioSan Luis Obispo

ONT - SBP

ONTSBP

Ontario

Tue 8/25

4:27 pm-11:50 pm

2 stops31h 23m

San Luis Obispo County

Fri 8/28

3:24 pm-3:52 pm

2 stops24h 28m

$455

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/15

Showing 1-10 of 23 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 July.
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.

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 July 18, 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
10,006 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

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
10,006 reviews
United Airlines
7.4
Good
10,006 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

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 $279, United Airlines can have you in San Luis Obispo from Ontario in 5h 45m. Airlines will cover a distance of 191 mi.

  • 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 $239. United Airlines is priced at 45% lower than the current average price of a flight leaving 3 months from now.

  • 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.

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
Cambria
Morro Bay
Arroyo Grande
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 July 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$239Average$369FlexibilityNo cancel feeOn-time69%

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