$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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — STS
abr. 21 — abr. 281
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
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 Santa Rosa
Cheapest
Best
Last-minute
One-way
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 marzo 22, 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 marzo 22, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/612:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
mié. 5/135:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$117
This Alaska Airlines deal was found by Cheapflights users on 3/21. 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.
mié. 4/2212:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
sáb. 5/210:41 am
STS
- ONT
Nonstop1h 27m
Alaska Airlines
Deal found 3/21![Alaska Airlines logo]()
$137
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/712:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
mié. 5/135:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$147
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/74:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
mié. 4/82:12 pm
STS
- ONT
Nonstop1h 30m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$157
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/812:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
mié. 5/135:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$167
This Southwest deal was found by Cheapflights users on 3/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/179:25 am
ONT
- STS
1 stop6h 35m
Southwest
sáb. 4/181:00 pm
STS
- ONT
1 stop8h 20m
Southwest
Deal found 3/18![Southwest logo]()
$174
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/712:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
jue. 5/145:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$177
This Southwest deal was found by Cheapflights users on 3/20. 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.
mar. 4/212:25 pm
ONT
- STS
2 stops7h 45m
Southwest
vie. 4/244:40 pm
STS
- ONT
2 stops6h 25m
Southwest
Deal found 3/20![Southwest logo]()
$184
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/74:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
vie. 4/102:12 pm
STS
- ONT
Nonstop1h 30m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$187
This Orbitz deal was found by Cheapflights users on 3/17. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/174:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
lun. 4/202:12 pm
STS
- ONT
Nonstop1h 30m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$192
This Alaska Airlines deal was found by Cheapflights users on 3/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/2312:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
lun. 4/2710:41 am
STS
- ONT
Nonstop1h 27m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$197
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 marzo 22, 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 marzo 22, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/21. 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.
jue. 4/2312:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
mar. 4/2810:41 am
STS
- ONT
Nonstop1h 27m
Alaska Airlines
Deal found 3/21![Alaska Airlines logo]()
$147
This Southwest deal was found by Cheapflights users on 3/19. 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.
vie. 5/13:35 pm
ONT
- STS
2 stops7h 05m
Southwest
lun. 5/44:40 pm
STS
- ONT
2 stops6h 25m
Southwest
Deal found 3/19![Southwest logo]()
$207
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/74:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
mié. 4/82:12 pm
STS
- ONT
Nonstop1h 30m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$157
This Alaska Airlines deal was found by Cheapflights users on 3/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 4/2512:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
mar. 4/2810:41 am
STS
- ONT
Nonstop1h 27m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$167
This Southwest deal was found by Cheapflights users on 3/19. 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.
mié. 6/33:45 pm
ONT
- STS
2 stops6h 25m
Southwest
dom. 6/76:10 am
STS
- ONT
2 stops6h 10m
Southwest
Deal found 3/19![Southwest logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 3/20. 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.
mié. 6/246:43 pm
ONT
- STS
Nonstop1h 31m
Alaska Airlines
mié. 7/14:35 pm
STS
- ONT
Nonstop1h 28m
Alaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 3/19. 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.
jue. 5/213:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
dom. 5/245:44 pm
STS
- ONT
Nonstop1h 24m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/212:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
sáb. 5/27:46 pm
STS
- ONT
1 stop18h 46m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$270
This Alaska Airlines deal was found by Cheapflights users on 3/21. 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.
vie. 4/104:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
dom. 4/122:18 pm
STS
- ONT
Nonstop1h 30m
Alaska Airlines
Deal found 3/21![Alaska Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 4/44:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
mar. 4/72:12 pm
STS
- ONT
Nonstop1h 30m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/512:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
vie. 5/156:59 pm
STS
- ONT
1 stop15h 22m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$280
This Alaska Airlines deal was found by Cheapflights users on 3/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/612:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
vie. 5/156:59 pm
STS
- ONT
1 stop15h 22m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$280
Last-minute flights from Ontario to Santa RosaDiscover last-minute flight deals from Ontario to Santa Rosa. Data last updated marzo 22, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Santa Rosa. Data last updated marzo 22, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/74:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
mié. 4/82:12 pm
STS
- ONT
Nonstop1h 30m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$157
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/74:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
vie. 4/102:12 pm
STS
- ONT
Nonstop1h 30m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$187
This CheapOair deal was found by Cheapflights users on 3/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/154:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
sáb. 4/182:12 pm
STS
- ONT
Nonstop1h 30m
Alaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$117
This Southwest deal was found by Cheapflights users on 3/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/179:25 am
ONT
- STS
1 stop6h 35m
Southwest
sáb. 4/181:00 pm
STS
- ONT
1 stop8h 20m
Southwest
Deal found 3/18![Southwest logo]()
$174
This Orbitz deal was found by Cheapflights users on 3/17. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/174:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
lun. 4/202:12 pm
STS
- ONT
Nonstop1h 30m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$192
This Southwest deal was found by Cheapflights users on 3/20. 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.
mar. 4/212:25 pm
ONT
- STS
2 stops7h 45m
Southwest
vie. 4/244:40 pm
STS
- ONT
2 stops6h 25m
Southwest
Deal found 3/20![Southwest logo]()
$184
This Alaska Airlines deal was found by Cheapflights users on 3/21. 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.
mié. 4/2212:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
sáb. 5/210:41 am
STS
- ONT
Nonstop1h 27m
Alaska Airlines
Deal found 3/21![Alaska Airlines logo]()
$137
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/2212:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
dom. 4/2610:41 am
STS
- ONT
Nonstop1h 27m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$167
This Alaska Airlines deal was found by Cheapflights users on 3/21. 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.
jue. 4/2312:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
mar. 4/2810:41 am
STS
- ONT
Nonstop1h 27m
Alaska Airlines
Deal found 3/21![Alaska Airlines logo]()
$147
This Alaska Airlines deal was found by Cheapflights users on 3/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/2312:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
lun. 4/2710:41 am
STS
- ONT
Nonstop1h 27m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 3/20. 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.
jue. 4/3012:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
jue. 5/710:41 am
STS
- ONT
Nonstop1h 27m
Alaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$177
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 marzo 22, 2026.
Search for one-way flight options from Ontario to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated marzo 22, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/154:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$79
This Southwest deal was found by Cheapflights users on 3/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/152:25 pm
ONT
- STS
2 stops7h 45m
Southwest
Deal found 3/17![Southwest logo]()
$81
This CheapOair deal was found by Cheapflights users on 3/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/212:48 pm
ONT
- STS
Nonstop1h 32m
Alaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$99
This Alaska Airlines deal was found by Cheapflights users on 3/19. 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.
jue. 4/94:22 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$109
This Southwest deal was found by Cheapflights users on 3/19. 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.
sáb. 6/65:30 am
ONT
- STS
2 stops8h 00m
Southwest
Deal found 3/19![Southwest logo]()
$124
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/173:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$129
This Southwest deal was found by Cheapflights users on 3/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/303:30 pm
ONT
- STS
2 stops7h 15m
Southwest
Deal found 3/18![Southwest logo]()
$144
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/313:35 pm
ONT
- STS
Nonstop1h 29m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$149
This Alaska Airlines deal was found by Cheapflights users on 3/20. 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.
dom. 4/54:28 pm
ONT
- STS
Nonstop2h 00m
Alaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$159
This American Airlines deal was found by Cheapflights users on 3/19. 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.
jue. 4/29:53 am
ONT
- STS
1 stop6h 00m
American Airlines
Deal found 3/19![American Airlines logo]()
$169
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 marzo 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $117 (Alaska Airlines) |
One-way from | $79 (Alaska Airlines) |
Popular in | September |
Cheapest in | November |
Average price | $351 |
Good round-trip deal | $137 or less |
Good one-way deal | $78 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 marzo 22, 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
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
jue. 4/23
12:48 pm-2:20 pm
Nonstop1h 32m
Santa Rosa Sonoma County
mar. 4/28
10:41 am-12:08 pm
Nonstop1h 27m
$147
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
mar. 4/7
4:22 pm-6:22 pm
Nonstop2h 00m
Santa Rosa Sonoma County
mié. 4/8
2:12 pm-3:42 pm
Nonstop1h 30m
$157
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
sáb. 4/25
12:48 pm-2:20 pm
Nonstop1h 32m
Santa Rosa Sonoma County
mar. 4/28
10:41 am-12:08 pm
Nonstop1h 27m
$167
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
vie. 5/1
3:35 pm-10:40 pm
2 stops7h 05m
Santa Rosa Sonoma County
lun. 5/4
4:40 pm-11:05 pm
2 stops6h 25m
$207
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
mié. 6/24
6:43 pm-8:14 pm
Nonstop1h 31m
Santa Rosa Sonoma County
mié. 7/1
4:35 pm-6:03 pm
Nonstop1h 28m
$217
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
mié. 6/3
3:45 pm-10:10 pm
2 stops6h 25m
Santa Rosa Sonoma County
dom. 6/7
6:10 am-12:20 pm
2 stops6h 10m
$247
Quickest round-trip
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
jue. 5/21
3:35 pm-5:04 pm
Nonstop1h 29m
Santa Rosa Sonoma County
dom. 5/24
5:44 pm-7:08 pm
Nonstop1h 24m
$247
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
sáb. 5/2
12:48 pm-2:20 pm
Nonstop1h 32m
Santa Rosa Sonoma County
sáb. 5/2
7:46 pm-2:32 pm
1 stop18h 46m
$270
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
vie. 4/10
4:22 pm-6:22 pm
Nonstop2h 00m
Santa Rosa Sonoma County
dom. 4/12
2:18 pm-3:48 pm
Nonstop1h 30m
$277
OntarioSanta Rosa
ONT - STS
ONTSTS
Ontario
sáb. 4/4
4:22 pm-6:22 pm
Nonstop2h 00m
Santa Rosa Sonoma County
mar. 4/7
2:12 pm-3:42 pm
Nonstop1h 30m
$277
Showing 1-10 of 23 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 March.
| 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
What is the cheapest month to book a flight from Ontario to Santa Rosa?
Currently, May is the cheapest month in which you can book a flight from Ontario to Santa Rosa (average of $28). Flying from Ontario to Santa Rosa in October is currently the most expensive (average of $58). 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 marzo 22, 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 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 marzo 22, 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.
Overall
7.9
Entertainment
7.0
Food
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Overall
7.9
Entertainment
7.0
Food
7.0
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
Excellentrobert,Feb 2026
LAS - SAN
Overall
7.9
Entertainment
7.0
Food
7.0
Boarding
8.1
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
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
Complete your trip
Flights by cabin class
Other flight options
Other flights from Ontario
Popular flights
Santa Rosa flight routes
Alternative routes for Ontario to Santa Rosa
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Santa Rosa by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Santa Rosa by cabin class
Find flights from Ontario to Santa Rosa, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Santa Rosa flights
Browse other Ontario and Santa Rosa flight options. Last updated on marzo 22, 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 marzo 22, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 marzo 22, 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 marzo 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$187 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$222 | Average$366 | FlexibilityNo cancel fee | On-time71% |