Cheap Frontier Airlines flights Phoenix (PHX) to Ontario (ONT)

Cheap Frontier Airlines flights Phoenix (PHX) to Ontario (ONT)

Prices were available within the past 7 days and start at for one-way flights and $170 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jul 8 - Sat, Jul 12

PHX

Phoenix

ONT

Ontario

$170 Roundtrip, found 15 hours ago

$170

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Tue, Jul 8 from Phoenix to Ontario, returning Sat, Jul 12, priced at $170 found 15 hours ago

Tue, Jul 8 - Thu, Jul 10

PHX

Phoenix

ONT

Ontario

$185 Roundtrip, found 15 hours ago

$185

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Tue, Jul 8 from Phoenix to Ontario, returning Thu, Jul 10, priced at $185 found 15 hours ago