Cheap Frontier Airlines flights Baltimore (BWI) to Ontario (ONT)

Cheap Frontier Airlines flights Baltimore (BWI) to Ontario (ONT)

Prices were available within the past 7 days and start at for one-way flights and $302 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jan 3 - Fri, Jan 16

BWI

Baltimore

ONT

Ontario

$302 Roundtrip, found 5 days ago

$302

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sat, Jan 3 from Baltimore to Ontario, returning Fri, Jan 16, priced at $302 found 5 days ago

Sun, Jan 18 - Mon, Jan 19

BWI

Baltimore

ONT

Ontario

$310 Roundtrip, found 1 day ago

$310

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Jan 18 from Baltimore to Ontario, returning Mon, Jan 19, priced at $310 found 1 day ago

Sun, Jan 4 - Fri, Jan 16

BWI

Baltimore

ONT

Ontario

$327 Roundtrip, found 5 days ago

$327

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sun, Jan 4 from Baltimore to Ontario, returning Fri, Jan 16, priced at $327 found 5 days ago

Sat, Jan 3 - Mon, Jan 19

BWI

Baltimore

ONT

Ontario

$337 Roundtrip, found 5 days ago

$337

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sat, Jan 3 from Baltimore to Ontario, returning Mon, Jan 19, priced at $337 found 5 days ago

Sun, Jan 4 - Mon, Jan 19

BWI

Baltimore

ONT

Ontario

$362 Roundtrip, found 5 days ago

$362

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sun, Jan 4 from Baltimore to Ontario, returning Mon, Jan 19, priced at $362 found 5 days ago

Thu, Jan 15 - Sun, Jan 18

BWI

Baltimore

ONT

Ontario

$380 Roundtrip, found 1 day ago

$380

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jan 15 from Baltimore to Ontario, returning Sun, Jan 18, priced at $380 found 1 day ago