• TipJune is the cheapest month to fly to Ontario, California

Best Deals to Ontario, California Last modified: Jul 23, 2019 4:02 -04:00

We've scanned 48,195,047,545 round trip itineraries and found the cheapest flights to Ontario, California. Frontier & United frequently offer the best deals to Ontario, California flights, or select your preferred carrier below to see the cheapest days to fly.

Frontier
AUSONT
Sat 8/3
nonstop
ONTAUS
Tue 8/6
nonstop
$167
United
DENONT
Sun 8/4
nonstop
ONTDEN
Thu 8/8
nonstop
$301
American
WASONT
Wed 7/31
2 stops
ONTWAS
Wed 8/14
2 stops
$417
Major Airlines
CLTONT
Fri 8/2
1 stop
ONTCLT
Sun 8/4
1 stop
$541
United
INDONT
Sun 8/4
1 stop
ONTIND
Thu 8/8
1 stop
$724

Cheap Flights from Ontario, California (ONT)

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