Cheap Frontier Airlines flights Milwaukee (MKE) to Ontario (ONT)

Cheap Frontier Airlines flights Milwaukee (MKE) to Ontario (ONT)

Prices were available within the past 7 days and start at for one-way flights and $250 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Sep 8 - Thu, Sep 11

MKE

Milwaukee

ONT

Ontario

$250 Roundtrip, found 13 hours ago

$250

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Mon, Sep 8 from Milwaukee to Ontario, returning Thu, Sep 11, priced at $250 found 13 hours ago

Mon, Sep 8 - Fri, Sep 12

MKE

Milwaukee

ONT

Ontario

$280 Roundtrip, found 13 hours ago

$280

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Mon, Sep 8 from Milwaukee to Ontario, returning Fri, Sep 12, priced at $280 found 13 hours ago

Fri, Sep 12 - Mon, Sep 15

MKE

Milwaukee

ONT

Ontario

$310 Roundtrip, found 13 hours ago

$310

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Fri, Sep 12 from Milwaukee to Ontario, returning Mon, Sep 15, priced at $310 found 13 hours ago