$64 Cheap Frontier Airlines flights Ontario (ONT) to Portland (PDX)

View $64 flight on Tue, Aug 5, 2025Opens in a new window

$64 Cheap Frontier Airlines flights Ontario (ONT) to Portland (PDX)

Prices were available within the past 7 days and start at $64 for one-way flights and $119 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Frontier Airlines
Tue, Jul 29 - Tue, Aug 5
ONT
Ontario
PDX
Portland
$119
Roundtrip
Found 6 days ago
Select Frontier Airlines flight, departing Tue, Jul 29 from Ontario to Portland, returning Tue, Aug 5, priced at $119 Found 6 days ago
Frontier Airlines
Tue, Aug 5 - Thu, Aug 7
ONT
Ontario
PDX
Portland
$128
Roundtrip
Found 23 hours ago
Select Frontier Airlines flight, departing Tue, Aug 5 from Ontario to Portland, returning Thu, Aug 7, priced at $128 Found 23 hours ago
Frontier Airlines
Sun, Aug 3 - Thu, Aug 7
ONT
Ontario
PDX
Portland
$133
Roundtrip
Found 23 hours ago
Select Frontier Airlines flight, departing Sun, Aug 3 from Ontario to Portland, returning Thu, Aug 7, priced at $133 Found 23 hours ago
Frontier Airlines
Mon, Aug 4 - Tue, Aug 5
ONT
Ontario
PDX
Portland
$138
Roundtrip
Found 23 hours ago
Select Frontier Airlines flight, departing Mon, Aug 4 from Ontario to Portland, returning Tue, Aug 5, priced at $138 Found 23 hours ago
Frontier Airlines
Sat, Aug 2 - Thu, Aug 7
ONT
Ontario
PDX
Portland
$143
Roundtrip
Found 23 hours ago
Select Frontier Airlines flight, departing Sat, Aug 2 from Ontario to Portland, returning Thu, Aug 7, priced at $143 Found 23 hours ago
Frontier Airlines
Thu, Jul 31 - Thu, Aug 7
ONT
Ontario
PDX
Portland
$148
Roundtrip
Found 23 hours ago
Select Frontier Airlines flight, departing Thu, Jul 31 from Ontario to Portland, returning Thu, Aug 7, priced at $148 Found 23 hours ago
Flights from Ontario (ONT) to Portland (PDX)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Portland Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Popular airline
Frontier Airlines
Distance
1342 km
Average flight time
3 hours 12 mins