$100 Cheap Frontier Airlines flights Phoenix (PHX) to Ontario Intl. Airport (ONT)

$100 Cheap Frontier Airlines flights Phoenix (PHX) to Ontario Intl. Airport (ONT)

Prices were available within the past 7 days and start at $100 for one-way flights and $221 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Aug 6 - Mon, Aug 10

PHX

Phoenix

ONT

Ontario

$221 Roundtrip, found 5 hours ago

$221

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Thu, Aug 6 from Phoenix to Ontario, returning Mon, Aug 10, priced at $221 found 5 hours ago

Thu, Aug 6 - Mon, Aug 10

PHX

Phoenix

ONT

Ontario

$233 Roundtrip, found 5 hours ago

$233

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Thu, Aug 6 from Phoenix to Ontario, returning Mon, Aug 10, priced at $233 found 5 hours ago

Thu, Aug 6 - Mon, Aug 10

PHX

Phoenix

ONT

Ontario

$237 Roundtrip, found 5 hours ago

$237

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Thu, Aug 6 from Phoenix to Ontario, returning Mon, Aug 10, priced at $237 found 5 hours ago

Thu, Aug 6 - Mon, Aug 10

PHX

Phoenix

ONT

Ontario

$266 Roundtrip, found 5 hours ago

$266

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Thu, Aug 6 from Phoenix to Ontario, returning Mon, Aug 10, priced at $266 found 5 hours ago

Thu, Aug 6 - Mon, Aug 10

PHX

Phoenix

ONT

Ontario

$271 Roundtrip, found 5 hours ago

$271

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Thu, Aug 6 from Phoenix to Ontario, returning Mon, Aug 10, priced at $271 found 5 hours ago

Thu, Aug 6 - Mon, Aug 10

PHX

Phoenix

ONT

Ontario

$275 Roundtrip, found 5 hours ago

$275

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Thu, Aug 6 from Phoenix to Ontario, returning Mon, Aug 10, priced at $275 found 5 hours ago