$141 Cheap Frontier Airlines flights Boise (BOI) to Ontario (ONT)

$141 Cheap Frontier Airlines flights Boise (BOI) to Ontario (ONT)

Prices were available within the past 7 days and start at $141 for one-way flights and $210 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, May 25 - Tue, May 27

BOI

Boise

ONT

Ontario

$210 Roundtrip, found 4 days ago

$210

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sun, May 25 from Boise to Ontario, returning Tue, May 27, priced at $210 found 4 days ago

Tue, May 20 - Tue, May 27

BOI

Boise

ONT

Ontario

$211 Roundtrip, found 14 hours ago

$211

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Tue, May 20 from Boise to Ontario, returning Tue, May 27, priced at $211 found 14 hours ago

Thu, May 22 - Tue, May 27

BOI

Boise

ONT

Ontario

$220 Roundtrip, found 14 hours ago

$220

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Thu, May 22 from Boise to Ontario, returning Tue, May 27, priced at $220 found 14 hours ago

Thu, May 22 - Sat, May 24

BOI

Boise

ONT

Ontario

$221 Roundtrip, found 14 hours ago

$221

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Thu, May 22 from Boise to Ontario, returning Sat, May 24, priced at $221 found 14 hours ago

Tue, May 20 - Sat, May 31

BOI

Boise

ONT

Ontario

$240 Roundtrip, found 4 days ago

$240

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Tue, May 20 from Boise to Ontario, returning Sat, May 31, priced at $240 found 4 days ago

Tue, May 20 - Thu, May 22

BOI

Boise

ONT

Ontario

$241 Roundtrip, found 14 hours ago

$241

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Tue, May 20 from Boise to Ontario, returning Thu, May 22, priced at $241 found 14 hours ago

Thu, May 22 - Mon, May 26

BOI

Boise

ONT

Ontario

$250 Roundtrip, found 14 hours ago

$250

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Thu, May 22 from Boise to Ontario, returning Mon, May 26, priced at $250 found 14 hours ago

Sun, May 18 - Mon, May 19

BOI

Boise

ONT

Ontario

$260 Roundtrip, found 14 hours ago

$260

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sun, May 18 from Boise to Ontario, returning Mon, May 19, priced at $260 found 14 hours ago

Sun, May 18 - Thu, May 22

BOI

Boise

ONT

Ontario

$271 Roundtrip, found 14 hours ago

$271

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sun, May 18 from Boise to Ontario, returning Thu, May 22, priced at $271 found 14 hours ago