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Santa Rosa

$100+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — STS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$247
(American Airlines)

One-way from

$100
(American Airlines)

Popular in

October

Cheapest in

December

Average price

$197
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 June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 11/510:31 amONT - STS
1 stop5h 21mAmerican Airlines
Sat 11/84:15 pmSTS - ONT
1 stop5h 26mAmerican Airlines
Deal found 6/10$247
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 11/46:00 amONT - STS
1 stop15h 50mAlaska Airlines
Wed 11/511:58 amSTS - ONT
1 stop11h 58mAlaska Airlines
Deal found 6/10$343
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/3010:06 amONT - STS
1 stop6h 08mHawaiian Airlines
Mon 9/15:55 pmSTS - ONT
1 stop5h 58mHawaiian Airlines
Deal found 6/11$557

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 June 12, 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

Wed 11/5

10:31 am-3:52 pm

1 stop5h 21m

Santa Rosa Sonoma County

Sat 11/8

4:15 pm-9:41 pm

1 stop5h 26m

$247

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Tue 11/4

6:00 am-9:50 pm

1 stop15h 50m

Santa Rosa Sonoma County

Wed 11/5

11:58 am-11:56 pm

1 stop11h 58m

$343

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Sat 8/30

10:06 am-4:14 pm

1 stop6h 08m

Santa Rosa Sonoma County

Mon 9/1

5:55 pm-11:53 pm

1 stop5h 58m

$557

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Fri 7/4

6:23 am-12:40 pm

1 stop6h 17m

$100

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Wed 9/10

6:00 am-1:36 pm

1 stop7h 36m

$172

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Mon 12/1

7:00 am-12:08 pm

1 stop5h 08m

$311

OntarioSanta Rosa

ONT - STS

ONTSTS

Ontario

Thu 7/3

6:10 am-7:07 pm

3 stops12h 57m

$583

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 June 12, 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.

Rainfall in Santa Rosa by month

Plan your trip to Santa Rosa by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Santa Rosa ranges from 0.0 - 7.1 inches per month. January is typically the wettest month, when rainfall can reach 7.1 in. July is typically the driest time to visit Santa Rosa when rainfall is around 0.0 in.

Temperature in Santa Rosa by month

Plan your trip to Santa Rosa by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Santa Rosa, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 46.4 F).

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 June 12, 2025.
To help decide which airline to fly from Ontario to Santa Rosa, see what other customers have to say about Alaska Airlines, Hawaiian Airlines and American Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

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

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

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

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

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 $247. Other airlines that can offer you cheap pricing are Alaska Airlines, from $343, and Hawaiian Airlines, from $557.

  • What are the cheapest airlines to fly from Ontario to Santa Rosa one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $100. Users have also found prices from $172 and $311 on Alaska Airlines and Hawaiian Airlines, respectively.

  • 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Avelo AirlinesCheapest$67Average$86FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$232Average$282FlexibilityNo cancel feeOn-time71%

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