San Francisco to Ontario

SFOONT

Fly from San Francisco to Ontario starting at USD 28 with Frontier Airlines.Best fare available on Jul 29, 2026.Limited seats. Better plans. Book before it's gone.

San Francisco to Ontario cheapest flights this week

27 Jul
United Airlines
21:00SFO
22:37ONT
DirectUSD 148VIEW DEAL
29 Jul
Frontier Airlines
11:15SFO
12:53ONT
DirectUSD 28VIEW DEAL
1 Aug
Frontier Airlines
09:33SFO
11:07ONT
DirectUSD 30VIEW DEAL
3 Aug
Frontier Airlines
15:43SFO
08:03ONT
1 StopUSD 183VIEW DEAL
4 Aug
Frontier Airlines
11:15SFO
12:53ONT
DirectUSD 155VIEW DEAL
5 Aug
Frontier Airlines
11:15SFO
12:48ONT
DirectUSD 37VIEW DEAL
5 Aug
Frontier Airlines
12:22SFO
10:04ONT
1 StopUSD 151VIEW DEAL
6 Aug
Frontier Airlines
09:33SFO
11:02ONT
DirectUSD 37VIEW DEAL
7 Aug
Frontier Airlines
09:33SFO
11:02ONT
DirectUSD 63VIEW DEAL
10 Aug
Frontier Airlines
09:33SFO
11:02ONT
DirectUSD 36VIEW DEAL

San Francisco to Ontario monthly flight fare trend

Jul
from USD 28
Aug
from USD 28
Sep
from USD 26
Oct
No flights
Nov
No flights
Dec
No flights

Airport Details

Origin

San Francisco

San Francisco International Airport (SFO)

San Francisco, SFO
Zone

Los Angeles

Elev

13 ft

Destination

Ontario

Ontario International Airport (ONT)

Ontario, ONT
Zone

Los Angeles

Elev

944 ft

Flights from San Francisco

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