Flights from Portland to Rialto

Cheapest flights from Portland

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Aug 7 - Sun, Aug 10

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$128 Roundtrip, found 4 days ago

$128

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Thu, Aug 7 from Portland Intl. to Los Angeles - Ontario Intl., returning Sun, Aug 10, priced at $128 found 4 days ago

Tue, Aug 5 - Sun, Aug 10

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$138 Roundtrip, found 4 days ago

$138

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Tue, Aug 5 from Portland Intl. to Los Angeles - Ontario Intl., returning Sun, Aug 10, priced at $138 found 4 days ago

Sat, Jul 19 - Sun, Jul 27

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$148 Roundtrip, found 3 days ago

$148

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Jul 19 from Portland Intl. to Los Angeles - Ontario Intl., returning Sun, Jul 27, priced at $148 found 3 days ago

Sat, Jul 19 - Tue, Jul 22

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$153 Roundtrip, found 3 days ago

$153

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Jul 19 from Portland Intl. to Los Angeles - Ontario Intl., returning Tue, Jul 22, priced at $153 found 3 days ago

Tue, Jul 15 - Sat, Jul 26

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$154 Roundtrip, found 3 days ago

$154

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Tue, Jul 15 from Portland Intl. to Los Angeles - Ontario Intl., returning Sat, Jul 26, priced at $154 found 3 days ago

Tue, Aug 5 - Fri, Aug 15

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$158 Roundtrip, found 4 days ago

$158

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Tue, Aug 5 from Portland Intl. to Los Angeles - Ontario Intl., returning Fri, Aug 15, priced at $158 found 4 days ago

Tue, Jul 15 - Sun, Jul 27

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$159 Roundtrip, found 3 days ago

$159

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Tue, Jul 15 from Portland Intl. to Los Angeles - Ontario Intl., returning Sun, Jul 27, priced at $159 found 3 days ago

Fri, Aug 8 - Wed, Aug 13

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$161 Roundtrip, found 4 days ago

$161

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Aug 8 from Portland Intl. to Los Angeles - Ontario Intl., returning Wed, Aug 13, priced at $161 found 4 days ago

Sat, Jul 19 - Thu, Jul 24

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$163 Roundtrip, found 3 days ago

$163

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Jul 19 from Portland Intl. to Los Angeles - Ontario Intl., returning Thu, Jul 24, priced at $163 found 3 days ago

Mon, Aug 4 - Fri, Aug 15

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$168 Roundtrip, found 4 days ago

$168

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Mon, Aug 4 from Portland Intl. to Los Angeles - Ontario Intl., returning Fri, Aug 15, priced at $168 found 4 days ago

Sat, Aug 2 - Wed, Aug 13

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$171 Roundtrip, found 4 days ago

$171

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sat, Aug 2 from Portland Intl. to Los Angeles - Ontario Intl., returning Wed, Aug 13, priced at $171 found 4 days ago

Sun, Aug 3 - Fri, Aug 15

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$173 Roundtrip, found 4 days ago

$173

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sun, Aug 3 from Portland Intl. to Los Angeles - Ontario Intl., returning Fri, Aug 15, priced at $173 found 4 days ago

Sat, Jul 19 - Mon, Jul 28

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$176 Roundtrip, found 3 days ago

$176

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Jul 19 from Portland Intl. to Los Angeles - Ontario Intl., returning Mon, Jul 28, priced at $176 found 3 days ago

Mon, Jul 14 - Sat, Jul 26

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$178 Roundtrip, found 3 days ago

$178

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Jul 14 from Portland Intl. to Los Angeles - Ontario Intl., returning Sat, Jul 26, priced at $178 found 3 days ago

Thu, Jul 10 - Fri, Jul 11

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$180 Roundtrip, found 5 days ago

$180

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Thu, Jul 10 from Portland Intl. to Los Angeles - Ontario Intl., returning Fri, Jul 11, priced at $180 found 5 days ago

Wed, Nov 19 - Tue, Jan 6

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$197 Roundtrip, found 2 days ago

$197

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Wed, Nov 19 from Portland Intl. to Los Angeles - Ontario Intl., returning Tue, Jan 6, priced at $197 found 2 days ago

Wed, Jul 16 - Sat, Jul 26

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$257 Roundtrip, found 9 hours ago

$257

Roundtrip

found 9 hours ago

Select Alaska Airlines flight, departing Wed, Jul 16 from Portland Intl. to Los Angeles - Ontario Intl., returning Sat, Jul 26, priced at $257 found 9 hours ago

Wed, Jul 16 - Sat, Jul 26

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$267 Roundtrip, found 9 hours ago

$267

Roundtrip

found 9 hours ago

Select Delta flight, departing Wed, Jul 16 from Portland Intl. to Los Angeles - Ontario Intl., returning Sat, Jul 26, priced at $267 found 9 hours ago

Wed, Jul 16 - Sat, Jul 26

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$267 Roundtrip, found 9 hours ago

$267

Roundtrip

found 9 hours ago

Select American Airlines flight, departing Wed, Jul 16 from Portland Intl. to Los Angeles - Ontario Intl., returning Sat, Jul 26, priced at $267 found 9 hours ago

Wed, Jul 16 - Sat, Jul 26

PDX

Portland Intl.

ONT

Los Angeles - Ontario Intl.

$301 Roundtrip, found 9 hours ago

$301

Roundtrip

found 9 hours ago

Select United flight, departing Wed, Jul 16 from Portland Intl. to Los Angeles - Ontario Intl., returning Sat, Jul 26, priced at $301 found 9 hours ago