Skip to content

Get United's best fares today on flights from San Francisco to Ontario from *

Select journey type

Enter to select travel class and passengers

Book with confidence with United

Low fare calendar for flights from San Francisco (SFO) to Ontario (ONT)

Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
1
2
3
4
5
6
7
8
9
10
11
from
$304 Price subject to changes
Viewed:21 hours ago
Economy
Return:
12
from
$326 Price subject to changes
Viewed:10 hours ago
Economy
Return:
13
from
$232 Price subject to changes
Viewed:10 hours ago
Economy
Return:
14
from
$177 Price subject to changes
Viewed:10 hours ago
Economy
Return:
15
from
$177 Price subject to changes
Viewed:10 hours ago
Economy
Return:
16
from
$177 Price subject to changes
Viewed:10 hours ago
Economy
Return:
17
from
$197 Price subject to changes
Viewed:10 hours ago
Economy
Return:
18
from
$187 Price subject to changes
Viewed:10 hours ago
Economy
Return:
19
from
$242 Price subject to changes
Viewed:10 hours ago
Economy
Return:
20
from
$163 Price subject to changes
Viewed:10 hours ago
Economy
Return:
21
from
$163 Price subject to changes
Viewed:10 hours ago
Economy
Return:
22
from
$163 Price subject to changes
Viewed:10 hours ago
Economy
Return:
23
from
$163 Price subject to changes
Viewed:10 hours ago
Economy
Return:
24
from
$149 Price subject to changes
Viewed:10 hours ago
Economy
Return:
25
from
$139 Price subject to changes
Viewed:10 hours ago
Economy
Return:
26
from
$197 Price subject to changes
Viewed:10 hours ago
Economy
Return:
27
from
$97 Price subject to changes
Viewed:10 hours ago
Economy
Return:
28
from
$97 Price subject to changes
Viewed:10 hours ago
Economy
Return:
29
from
$97 Price subject to changes
Viewed:10 hours ago
Economy
Return:
30
from
$97 Price subject to changes
Viewed:10 hours ago
Economy
Return:
31
from
$107 Price subject to changes
Viewed:14 hours ago
Economy
Return:
from
$97 Price subject to changes
Viewed:10 hours ago
Economy
Return:
Lowest PriceToday
*Prices have been available for round trips within the last 48 hours and may not be currently available. Fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply.

Looking for additional flights from San Francisco to Ontario?

FromToDatesFare TypePrice

San Francisco (SFO)

Ontario (ONT)

Depart: 09/14/20

Return: 09/14/20

Roundtrip
from
$91*
Viewed:1dayago

San Francisco (SFO)

Ontario (ONT)

Depart: 08/11/20

Return: 08/18/20

Roundtrip
from
$97*
Viewed:9hoursago

San Francisco (SFO)

Ontario (ONT)

Depart: 08/12/20

Return: 08/19/20

Roundtrip
from
$97*
Viewed:9hoursago

San Francisco (SFO)

Ontario (ONT)

Depart: 08/13/20

Return: 08/20/20

Roundtrip
from
$97*
Viewed:9hoursago

San Francisco (SFO)

Ontario (ONT)

Depart: 08/15/20

Return: 08/22/20

Roundtrip
from
$97*
Viewed:9hoursago

San Francisco (SFO)

Ontario (ONT)

Depart: 08/17/20

Return: 08/24/20

Roundtrip
from
$97*
Viewed:9hoursago

San Francisco (SFO)

Ontario (ONT)

Depart: 08/18/20

Return: 08/25/20

Roundtrip
from
$97*
Viewed:9hoursago

San Francisco (SFO)

Ontario (ONT)

Depart: 08/19/20

Return: 08/26/20

Roundtrip
from
$97*
Viewed:9hoursago

San Francisco (SFO)

Ontario (ONT)

Depart: 08/20/20

Return: 08/27/20

Roundtrip
from
$97*
Viewed:9hoursago

San Francisco (SFO)

Ontario (ONT)

Depart: 08/22/20

Return: 08/29/20

Roundtrip
from
$97*
Viewed:9hoursago

*Prices have been available for round trips within the last 48 hours and may not be currently available. Fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply.

Weather in Ontario

Saturday few clouds
88°F 07/11/20
Sunday sky is clear
94°F 07/12/20
Monday sky is clear
90°F 07/13/20
Tuesday sky is clear
86°F 07/14/20
Wednesday sky is clear
84°F 07/15/20
Thursday sky is clear
83°F 07/16/20
Friday sky is clear
84°F 07/17/20
Powered by: OpenWeatherMap.org