San Francisco to Ontario

SFOONT

Fly from San Francisco to Ontario starting at USD 27 with Frontier Airlines.Best fare available on Aug 18, 2026.Limited seats. Better plans. Book before it's gone.

San Francisco to Ontario cheapest flights this week

12 Jul
United Airlines
21:00SFO
22:37ONT
DirectUSD 149VIEW DEAL
15 Jul
Frontier Airlines
11:15SFO
12:53ONT
DirectUSD 148VIEW DEAL
20 Jul
Frontier Airlines
09:33SFO
11:07ONT
DirectUSD 170VIEW DEAL
22 Jul
Frontier Airlines
11:15SFO
12:53ONT
DirectUSD 165VIEW DEAL
25 Jul
Frontier Airlines
09:33SFO
11:07ONT
DirectUSD 29VIEW DEAL
26 Jul
Frontier Airlines
09:33SFO
11:07ONT
DirectUSD 114VIEW DEAL
29 Jul
Frontier Airlines
11:15SFO
12:53ONT
DirectUSD 28VIEW DEAL
1 Aug
Frontier Airlines
09:33SFO
11:07ONT
DirectUSD 30VIEW DEAL
15 Aug
Frontier Airlines
09:33SFO
11:02ONT
DirectUSD 31VIEW DEAL
18 Aug
Frontier Airlines
12:33SFO
14:03ONT
DirectUSD 27VIEW DEAL

San Francisco to Ontario monthly flight fare trend

Jul
from USD 28
Aug
from USD 27
Sep
from USD 32
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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