Cheap flights from Ontario to Portland from $95 ONT → PDX

Found recently, and the cheapest we hold

It is also the cheapest return we hold, of any age.

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $133 to $289.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other 1-night return fares leaving within 3 days of 2 Feb 2027 to compare.

Every date we hold

7 fares on 5 departure dates

Which month looks cheapest?

February 2027 is the cheapest month — from $187.

Found recently, and the cheapest we hold

It is also the cheapest one-way we hold, of any age.

What have prices looked like?

Over 47 days, 26 Sept to 11 Nov, the cheapest one-way we saw each day was $86 to $218.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

No. We hold one-way fares on 1 other departure date within 3 days of 2 Feb 2027, and it is not cheaper.

Every date we hold

5 fares on 4 departure dates

Which month looks cheapest?

February 2027 is the cheapest month — from $95.

Return

Fares 60 to 89 days before departure were typically 52% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

One-way

Fares 7 to 13 days before departure were typically 7% lower than 0 to 6 days before departure.

From the cheapest one-way each day between 26 Sept and 11 Nov (47 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

How much is a return flight from Ontario to Portland?

The cheapest return found recently is $187 with Frontier Airlines, 2 Feb 2027 to 3 Feb 2027, found 2 days ago. The cheapest return fare on each of 5 departure dates is usually $199 to $421.

How much is a one-way flight from Ontario to Portland?

The cheapest one-way found recently is $95 with Frontier Airlines, 2 Feb 2027, found 2 days ago. The cheapest one-way fare on each of 4 departure dates is usually $106 to $124.

What is the cheapest month to fly from Ontario to Portland?

February 2027 is the cheapest month for a return, from $187, 2 Feb 2027 to 3 Feb 2027, found 2 days ago. It is the cheapest month for a one-way too, from $95, 2 Feb 2027, found 2 days ago.

How far ahead should I book a flight from Ontario to Portland?

In 49 days of prices between 24 Sept and 11 Nov, return fares 60 to 89 days before departure were typically 52% lower than 0 to 6 days before departure. In 47 days of prices between 26 Sept and 11 Nov, one-way fares 7 to 13 days before departure were typically 7% lower than 0 to 6 days before departure.

Is there a direct flight from Ontario to Portland?

Yes, the cheapest nonstop one-way found recently is $167 with Alaska Airlines, 31 Aug 2027, found 2 days ago.

How long is the flight from Ontario to Portland?

The cheapest nonstop one-way found recently, with Alaska Airlines on 31 Aug 2027, takes 2 h 14 min from Ontario International Airport (ONT) to Portland International Airport (PDX). The cheapest one-way found recently, with Frontier Airlines on 2 Feb 2027, takes 9 h 32 min with 1 stop.

Which airlines have the cheapest flights from Ontario to Portland?

Between 14 Nov and 2 Feb 2027, Frontier Airlines has the cheapest return on 4 of the 5 departure dates we hold, and Alaska Airlines on 1. Between 16 Dec and 31 Aug 2027, Southwest Airlines has the cheapest one-way on 2 of the 4 departure dates we hold, Frontier Airlines on 1 and Alaska Airlines on 1.