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Santa Rosa

$144+ Cheap flights from Ontario to Santa Rosa (ONT - STS)

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 7/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — STS
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
1 adult, Economy
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Cheap flight deals from Ontario to Santa Rosa

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Santa Rosa (STS). 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 2, 2025.

Round-trip from

$241
(American Airlines)

One-way from

$144
(American Airlines)

Popular in

October

Cheapest in

December

Average price

$306
From Ontario to Santa Rosa Sonoma County
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One-way flight from Ontario to Santa Rosa Sonoma County
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Highest demand for flights based on searches. 40% potential increase in price ($152 potential increase over avg. RT price).
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Cheapest flight prices on average. 16% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Ontario to Santa Rosa

Cheapest flights from Ontario to Santa Rosa
Explore the most affordable flight options available from Ontario to Santa Rosa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

This American Airlines deal was found by Cheapflights users on 6/30. 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.
Sun 8/319:00 amONT - STS
1 stop6h 47mAmerican Airlines
Tue 9/24:17 pmSTS - ONT
1 stop19h 39mAmerican Airlines
Deal found 6/30$241
This Alaska Airlines deal was found by Cheapflights users on 6/30. 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 9/36:00 amONT - STS
1 stop14h 08mAlaska Airlines
Tue 9/97:00 amSTS - ONT
1 stop11h 36mAlaska Airlines
Deal found 6/30$322
This Hawaiian Airlines deal was found by Cheapflights users on 6/30. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/310:06 amONT - STS
1 stop6h 08mHawaiian Airlines
Wed 10/86:51 pmSTS - ONT
1 stop4h 58mHawaiian Airlines
Deal found 6/30$452

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Santa Rosa 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 2, 2025.
Use the filters below to find and compare flights from Ontario to Santa Rosa that are best for you.

Fly from

Ontario

Fly to

Santa Rosa

Route

Depart

Return

Price

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sun 8/31

9:00 am-3:47 pm

1 stop6h 47m

Santa Rosa Sonoma County

Tue 9/2

4:17 pm-11:56 am

1 stop19h 39m

$241

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Wed 9/3

6:00 am-8:08 pm

1 stop14h 08m

Santa Rosa Sonoma County

Tue 9/9

7:00 am-6:36 pm

1 stop11h 36m

$322

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Fri 9/5

10:06 am-4:14 pm

1 stop6h 08m

Santa Rosa Sonoma County

Sun 9/7

5:55 pm-11:54 pm

1 stop5h 59m

$507

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Wed 7/23

6:15 am-12:31 pm

1 stop6h 16m

$144

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sat 9/13

3:06 pm-1:36 pm

1 stop22h 30m

$177

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sat 7/26

6:10 am-1:59 pm

2 stops7h 49m

$485

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Best time to book a flight from Ontario to Santa Rosa

Have a flexible travel schedule? Discover the best time to fly to Santa Rosa 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 Santa Rosa

What is the cheapest month to book a flight from Ontario to Santa Rosa?

Currently, February is the cheapest month in which you can book a flight from Ontario to Santa Rosa (average of $202). Flying from Ontario to Santa Rosa in June is currently the most expensive (average of $395). 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 STS?

Find hourly flight availability from Ontario to Santa Rosa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 2, 2025.

It’s optimal to fly from Ontario to Santa Rosa in the morning. By choosing this option you can save up to 61% on the cost of your flight, compared to a flight at noon.

Reviews of airlines servicing Santa Rosa

Get insights into the airlines that provide service to Santa Rosa. 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 Santa Rosa. Reviews last updated July 2, 2025.
Read through reviews of airlines operating flights from Ontario to Santa Rosa, such as Alaska Airlines, Hawaiian Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,542 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Santa Rosa. 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 Santa Rosa round-trip?

    Cheapflights users have booked flights from Ontario to Santa Rosa round-trip from $241. Other airlines that can offer you cheap pricing are Alaska Airlines, from $322, and Hawaiian Airlines, from $507.

  • Can I find deals for flights from Ontario to Santa Rosa that include hotel bookings?

    Yes. In addition to deals on Ontario to Santa Rosa flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Santa Rosa?

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

  • Can I find deals for business class flights from Ontario to Santa Rosa?

    Yes. Cheapflights offers flight deals from Ontario to Santa Rosa 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 Santa Rosa?

    Currently, February is the cheapest month in which you can book a flight from Ontario to Santa Rosa (average of $202). Flying from Ontario to Santa Rosa in June is currently the most expensive (average of $395). 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 Ontario?

Book flights to Ontario if you plan to visit one of these locations
Fort Bragg
Ukiah

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Top 2 airlines flying from Ontario to Santa Rosa

Discover the top 2 airlines that operate flights from Ontario to Santa Rosa. 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 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Avelo AirlinesCheapest$67Average$86FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$232Average$282FlexibilityNo cancel feeOn-time71%

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