Ontario to Portland ONT → PDX
Ontario International Airport (ONT) → Portland International Airport (PDX)
The cheapest return found recently is $267 with Frontier Airlines, 4 Nov – 25 Nov, found 2 days ago. The cheapest one-way found recently is $87 with American Airlines, 27 Oct, found 4 days ago.
Return
Not enough comparable prices yet for a usual return price.
Cheapest return found recently
$267
4 Nov – 25 Nov · Frontier Airlines
Ontario International Airport (ONT) → Portland International Airport (PDX)
Leaves 5:07 p.m. · Return leaves 10:27 a.m. · 32 h 9 min of travel, both ways together
out 1 stop, back 1 stop
found 2 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$267 4 Nov – 25 Novfound 2 days agoSee prices for these dates
$228 4 Nov – 8 Novfound 4 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $133 to $289.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Not enough comparable prices yet: we hold return fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other 21-night return fares leaving within 3 days of 4 Nov to compare.
Every date we hold
2 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 4 Nov – 8 Nov | $228 | American Airlines | Ontario International Airport (ONT) → Portland International Airport (PDX) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
Airlines on the cheapest dates: American Airlines.
One-way
The cheapest one-way fare on each of 3 departure dates is usually $94 to $158.
Cheapest one-way found recently
$87
27 Oct · American Airlines
Ontario International Airport (ONT) → Portland International Airport (PDX)
Leaves 6:15 a.m. · 7 h 24 min trip
1 stop
found 4 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$87 27 Octfound 4 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 23 days, 26 Sept to 18 Oct, the cheapest one-way we saw each day was $86 to $205.
At $87, the cheapest one-way found recently is at the low end of that range.
23 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 3 departure dates from 27 Oct to 31 Aug 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 27 Oct to compare.
Every date we hold
4 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 27 Oct | $87 | American Airlines | Ontario International Airport (ONT) → Portland International Airport (PDX) | 1 stop | found 4 days ago | Open this trip |
| 11 Nov | $101 | Southwest Airlines | Ontario International Airport (ONT) → Portland International Airport (PDX) | 1 stop | found 4 days ago | Open this trip |
| 31 Aug 2027 | $215 | United Airlines | Ontario International Airport (ONT) → Portland International Airport (PDX) | 1 stop | found 6 days ago | Open this trip |
Which month looks cheapest?
October 2026 is the cheapest month — from $87.
Airlines on the cheapest dates: American Airlines, Southwest Airlines, United Airlines.
Premium cabin fares from Ontario to Portland
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 4 Nov – 25 Nov in another cabin: Premium economy · Business · First
Today's prices for 27 Oct in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Portland?
Return
Fares 60 to 89 days before departure were typically 31% lower than 14 to 29 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 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.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 14–29 days | $239 | $172 | +46% | 16 |
| 30–59 days | $215 | $133 | +31% | 23 |
| 60–89 days | $164 | $164 | Cheapest seen | 8 |
One-way
The cheapest fares were 7 to 13 days before departure.
From the cheapest one-way each day between 26 Sept and 18 Oct (23 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.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $89 | $86 | +4% | 8 |
| 7–13 days | $86 | $86 | Cheapest seen | 7 |
| 180+ days | $204 | $199 | +137% | 23 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Los Angeles → Portland
56 km from Ontario
$592
$325 more than flying from Ontario
23 Oct – 26 Oct · BUR → PDX · out 1 stop, back 1 stop
found yesterday
Long Beach → Portland
60 km from Ontario
$415
$148 more than flying from Ontario
4 Nov – 25 Nov · LGB → PDX · out 1 stop, back nonstop
found 2 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Los Angeles → Portland
56 km from Ontario
$69
$18 less than flying from Ontario
11 Nov · LAX → PDX · 1 stop
found 4 days ago
Long Beach → Portland
60 km from Ontario
$103
$16 more than flying from Ontario
11 Nov · LGB → PDX · 1 stop
found 4 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 4 Nov – 25 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work