$79+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — STS
May 29 — Jun 51
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Santa Rosa 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
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Cheapest flights from Ontario to Santa RosaExplore 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 April 29, 2026.
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 April 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/163:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Tue 5/195:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$116
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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.
Sat 5/233:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Tue 5/265:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$117
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 5/203:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Sat 5/235:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$137
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Mon 6/13:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Sat 6/65:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$147
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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.
Fri 5/293:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Sat 5/305:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$157
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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.
Sat 6/63:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Tue 6/164:35 pm
STS
- ONT
Nonstop1h 28m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$167
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Fri 5/293:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Mon 6/15:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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.
Fri 5/293:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Sun 5/315:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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.
Sun 6/73:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Tue 6/164:35 pm
STS
- ONT
Nonstop1h 28m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Thu 6/186:43 pm
ONT
- STS
Nonstop1h 31m
Alaska Airlines
Mon 6/224:35 pm
STS
- ONT
Nonstop1h 28m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$217
This Southwest deal was found by Cheapflights users on 4/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/210:55 am
ONT
- STS
1 stop5h 00m
Southwest
Fri 6/53:55 pm
STS
- ONT
1 stop4h 15m
Southwest
Deal found 4/27![Southwest logo]()
$224
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Thu 5/213:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Sun 5/245:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$227
Best flights from Ontario to Santa RosaDiscover carefully curated flight deals from Ontario to Santa Rosa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
Discover carefully curated flight deals from Ontario to Santa Rosa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Mon 6/13:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Sat 6/65:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$147
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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.
Thu 5/283:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Tue 6/25:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$157
This Southwest deal was found by Cheapflights users on 4/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:15 am
ONT
- STS
1 stop9h 40m
Southwest
Sat 5/1612:00 pm
STS
- ONT
2 stops7h 20m
Southwest
Deal found 4/27![Southwest logo]()
$368
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Fri 5/293:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Mon 6/15:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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.
Fri 6/266:43 pm
ONT
- STS
Nonstop1h 31m
Alaska Airlines
Sun 6/284:35 pm
STS
- ONT
Nonstop1h 28m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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.
Sat 6/136:43 pm
ONT
- STS
Nonstop1h 31m
Alaska Airlines
Mon 6/154:35 pm
STS
- ONT
Nonstop1h 28m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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.
Sun 7/266:43 pm
ONT
- STS
Nonstop1h 31m
Alaska Airlines
Wed 7/294:35 pm
STS
- ONT
Nonstop1h 28m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Sat 5/233:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Sun 5/245:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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.
Thu 5/217:00 am
ONT
- STS
1 stop16h 30m
Alaska Airlines
Tue 5/265:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$320
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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.
Fri 5/297:41 pm
ONT
- STS
2 stops18h 32m
Alaska Airlines
Sun 5/315:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$370
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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.
Thu 5/213:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Mon 5/255:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$377
Last-minute flights from Ontario to Santa RosaDiscover last-minute flight deals from Ontario to Santa Rosa. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Santa Rosa. Data last updated April 29, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/163:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Tue 5/195:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$116
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 5/193:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Thu 5/285:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 5/203:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Sat 5/235:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$137
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Thu 5/213:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Sun 5/245:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Fri 5/223:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Thu 5/285:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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.
Sat 5/233:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Tue 5/265:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$117
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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 5/263:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Fri 5/296:59 pm
STS
- ONT
1 stop15h 22m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$250
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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.
Fri 5/293:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Sat 5/305:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$157
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Fri 5/293:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Mon 6/15:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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.
Fri 5/293:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Sun 5/315:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$197
One-way flights from Ontario to Santa RosaSearch for one-way flight options from Ontario to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
Search for one-way flight options from Ontario to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 6/33:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$79
This TeaFlight deal was found by Cheapflights users on 4/28. 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 TeaFlight is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/23:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$92
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 5/193:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$99
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Fri 6/53:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$119
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Mon 7/66:43 pm
ONT
- STS
Nonstop1h 31m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$139
This Southwest deal was found by Cheapflights users on 4/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/263:45 pm
ONT
- STS
2 stops6h 25m
Southwest
Deal found 4/25![Southwest logo]()
$144
This American Airlines deal was found by Cheapflights users on 4/25. 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 5/276:10 am
ONT
- STS
1 stop6h 23m
American Airlines
Deal found 4/25![American Airlines logo]()
$149
This Expedia deal was found by Cheapflights users on 4/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/273:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/213:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$168
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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 5/133:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$169
This Southwest deal was found by Cheapflights users on 4/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/49:45 am
ONT
- STS
2 stops6h 50m
Southwest
Deal found 4/27![Southwest logo]()
$174
This Southwest deal was found by Cheapflights users on 4/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/219:25 am
ONT
- STS
1 stop6h 35m
Southwest
Deal found 4/27![Southwest logo]()
$179
Find 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 April 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $116 (Kiwi.com) |
One-way from | $79 (Alaska Airlines) |
Popular in | October |
Cheapest in | November |
Average price | $293 |
Good round-trip deal | $157 or less |
Good one-way deal | $158 or less |
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 April 29, 2026.
Use the filters below to find and compare flights from Ontario to Santa Rosa that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
Mon 6/1
3:35 pm-5:04 pm
Nonstop1h 29m
Santa Rosa Sonoma County
Sat 6/6
5:44 pm-7:08 pm
Nonstop1h 24m
$147
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
Thu 5/28
3:35 pm-5:04 pm
Nonstop1h 29m
Santa Rosa Sonoma County
Tue 6/2
5:44 pm-7:08 pm
Nonstop1h 24m
$157
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
Fri 5/29
3:35 pm-5:04 pm
Nonstop1h 29m
Santa Rosa Sonoma County
Mon 6/1
5:44 pm-7:08 pm
Nonstop1h 24m
$177
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
Fri 6/26
6:43 pm-8:14 pm
Nonstop1h 31m
Santa Rosa Sonoma County
Sun 6/28
4:35 pm-6:03 pm
Nonstop1h 28m
$217
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
Sat 6/13
6:43 pm-8:14 pm
Nonstop1h 31m
Santa Rosa Sonoma County
Mon 6/15
4:35 pm-6:03 pm
Nonstop1h 28m
$217
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
Sun 7/26
6:43 pm-8:14 pm
Nonstop1h 31m
Santa Rosa Sonoma County
Wed 7/29
4:35 pm-6:03 pm
Nonstop1h 28m
$277
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
Sat 5/23
3:35 pm-5:04 pm
Nonstop1h 29m
Santa Rosa Sonoma County
Sun 5/24
5:44 pm-7:08 pm
Nonstop1h 24m
$297
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
Thu 5/21
7:00 am-11:30 pm
1 stop16h 30m
Santa Rosa Sonoma County
Tue 5/26
5:44 pm-7:08 pm
Nonstop1h 24m
$320
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
Tue 5/12
6:15 am-3:55 pm
1 stop9h 40m
Santa Rosa Sonoma County
Sat 5/16
12:00 pm-7:20 pm
2 stops7h 20m
$368
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
Fri 5/29
7:41 pm-2:13 pm
2 stops18h 32m
Santa Rosa Sonoma County
Sun 5/31
5:44 pm-7:08 pm
Nonstop1h 24m
$370
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Ontario to Santa Rosa
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 Santa Rosa in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Santa Rosa flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Santa Rosa flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Santa Rosa flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Santa Rosa 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-Santa Rosa 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 Santa Rosa
Have a flexible travel schedule? Discover the best time to fly to Santa Rosa from Ontario with our price prediction graph.
ONT-STS
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
Prices
Airlines
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 April 29, 2026.
It’s optimal to fly from Ontario to Santa Rosa in the evening. By choosing this option you can save up to 61% on the cost of your flight, compared to a flight in the afternoon.
How much does it cost to fly round-trip from Ontario to Santa Rosa?
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 April 29, 2026.
Read through reviews of airlines operating flights from Ontario to Santa Rosa, such as Alaska Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Food
7.1
Overall
7.9
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Food
7.1
Overall
7.9
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Boarding
8.1
Food
7.1
Overall
7.9
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
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.
Traveling to a place near Santa Rosa?
Book flights to Santa Rosa if you plan to visit one of these locationsFort Bragg
Ukiah
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Ontario and Santa Rosa flights
Browse other Ontario and Santa Rosa flight options. Last updated on April 29, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on April 29, 2026.
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Other flights to Santa Rosa
Explore flights to Santa Rosa departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 29, 2026.
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 April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$187 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$222 | Average$416 | FlexibilityNo cancel fee | On-time71% |