$529 Cheap United flights Ontario (ONT) to Louisville (SDF)

$529 Cheap United flights Ontario (ONT) to Louisville (SDF)

Prices were available within the past 7 days and start at $529 for one-way flights and $499 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Dec 22 - Thu, Jan 1

ONT

Ontario

SDF

Louisville

$499 Roundtrip, found 2 days ago

$499

Roundtrip

found 2 days ago

Select United flight, departing Mon, Dec 22 from Ontario to Louisville, returning Thu, Jan 1, priced at $499 found 2 days ago

Mon, Dec 22 - Sun, Dec 28

ONT

Ontario

SDF

Louisville

$793 Roundtrip, found 2 days ago

$793

Roundtrip

found 2 days ago

Select United flight, departing Mon, Dec 22 from Ontario to Louisville, returning Sun, Dec 28, priced at $793 found 2 days ago