Cheap Flights to Riverside County from $33

How much is the cheapest flight to Riverside County?

Prices were available within the past 7 days and start at $33 for one-way flights and $87 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, May 19 - Thu, May 21

SEA

Seattle

ONT

Ontario

$104 Roundtrip, found 4 hours ago

$104

Roundtrip

found 4 hours ago

Select Southwest Airlines flight, departing Tue, May 19 from Seattle to Ontario, returning Thu, May 21, priced at $104 found 4 hours ago

Tue, May 19 - Thu, May 21

SEA

Seattle

ONT

Ontario

$108 Roundtrip, found 4 hours ago

$108

Roundtrip

found 4 hours ago

Select Delta flight, departing Tue, May 19 from Seattle to Ontario, returning Thu, May 21, priced at $108 found 4 hours ago

Sat, May 16 - Thu, May 21

SEA

Seattle

ONT

Ontario

$109 Roundtrip, just found

$109

Roundtrip

just found

Select Southwest Airlines flight, departing Sat, May 16 from Seattle to Ontario, returning Thu, May 21, priced at $109 just found

Tue, May 19 - Thu, May 21

SEA

Seattle

ONT

Ontario

$109 Roundtrip, found 4 hours ago

$109

Roundtrip

found 4 hours ago

Select Southwest Airlines flight, departing Tue, May 19 from Seattle to Ontario, returning Thu, May 21, priced at $109 found 4 hours ago

Sun, May 17 - Thu, May 21

SEA

Seattle

ONT

Ontario

$114 Roundtrip, found 2 hours ago

$114

Roundtrip

found 2 hours ago

Select Southwest Airlines flight, departing Sun, May 17 from Seattle to Ontario, returning Thu, May 21, priced at $114 found 2 hours ago

Tue, May 19 - Thu, May 21

SEA

Seattle

ONT

Ontario

$118 Roundtrip, found 4 hours ago

$118

Roundtrip

found 4 hours ago

Select Delta flight, departing Tue, May 19 from Seattle to Ontario, returning Thu, May 21, priced at $118 found 4 hours ago

Sun, May 17 - Thu, May 21

SEA

Seattle

ONT

Ontario

$119 Roundtrip, found 2 hours ago

$119

Roundtrip

found 2 hours ago

Select Southwest Airlines flight, departing Sun, May 17 from Seattle to Ontario, returning Thu, May 21, priced at $119 found 2 hours ago

Sat, May 2 - Tue, May 5

SEA

Seattle

PSP

Palm Springs

$119 Roundtrip, just found

$119

Roundtrip

just found

Select Alaska Airlines flight, departing Sat, May 2 from Seattle to Palm Springs, returning Tue, May 5, priced at $119 just found

Sat, May 16 - Thu, May 21

SEA

Seattle

ONT

Ontario

$122 Roundtrip, just found

$122

Roundtrip

just found

Select United flight, departing Sat, May 16 from Seattle to Ontario, returning Thu, May 21, priced at $122 just found

Thu, May 21 - Sat, May 30

SEA

Seattle

ONT

Ontario

$139 Roundtrip, found 14 hours ago

$139

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Thu, May 21 from Seattle to Ontario, returning Sat, May 30, priced at $139 found 14 hours ago