San Diego to Ontario
SANONT
Fly from San Diego to Ontario starting at USD 50 with Frontier Airlines.
Best fare available on Nov 7, 2026.
Limited seats. Better plans. Book before it's gone.
San Diego to Ontario cheapest flights this week
San Diego to Ontario monthly flight fare trend
Oct
from USD 225
Nov
from USD 50
Dec
No flights
Jan
No flights
Feb
No flights
Mar
No flights
Airport Details
Origin
San Diego
San Diego International Airport (SAN)
San Diego, SAN
Zone
Los Angeles
Elev
17 ft
Destination
Ontario
Ontario International Airport (ONT)
Ontario, ONT
Zone
Los Angeles
Elev
944 ft
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