Portland to Ontario PDX → ONT
Portland International Airport (PDX) → Ontario International Airport (ONT)
The cheapest one-way found recently is $143 with Frontier Airlines, 27 Oct, found 2 days ago.
One-way
The cheapest one-way fare on each of 4 departure dates is usually $113 to $146.
Cheapest one-way found recently
$143
27 Oct · Frontier Airlines
Portland International Airport (PDX) → Ontario International Airport (ONT)
Leaves 12:02 p.m. · 11 h 49 min trip
1 stop
found 2 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$143 27 Octfound 2 days agoOpen this trip
$87 20 Octfound 4 days agoOpen this trip
What have prices looked like?
Over 7 days, 30 Sept to 18 Oct, the cheapest one-way we saw each day was $87 to $124.
At $143, the cheapest one-way found recently is above that range.
7 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 4 departure dates from 20 Oct to 18 Feb 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
5 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 20 Oct | $87 | American Airlines | Portland International Airport (PDX) → Ontario International Airport (ONT) | 1 stop | found 4 days ago | Open this trip |
| 27 Oct | $143 | Frontier Airlines | Portland International Airport (PDX) → Ontario International Airport (ONT) | 1 stop | found 2 days ago | Open this trip |
| 8 Nov | $122 | Frontier Airlines | Portland International Airport (PDX) → Ontario International Airport (ONT) | 1 stop | found 4 days ago | Open this trip |
| 18 Feb 2027 | $155 | Frontier Airlines | Portland International Airport (PDX) → Ontario International Airport (ONT) | 1 stop | found 2 days ago | Open this trip |
Which month looks cheapest?
October 2026 is the cheapest month — from $87.
Airlines on the cheapest dates: Frontier Airlines, American Airlines.
Premium cabin fares from Portland to Ontario
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 27 Oct in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Portland to Ontario?
One-way
Not enough history yet: in 7 days of one-way prices, 30 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Portland → Palm Springs
104 km from Ontario
$369
19 Nov – 22 Nov · PDX → PSP · out 1 stop, back 1 stop
found 3 days ago
Portland → Long Beach
60 km from Ontario
$156
12 Nov – 14 Nov · PDX → LGB · out 1 stop, back 1 stop
found 5 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Portland → Los Angeles
56 km from Ontario
$170
$27 more than flying to Ontario
27 Nov · PDX → LAX · nonstop
found 2 days ago
Portland → Long Beach
60 km from Ontario
$179
$36 more than flying to Ontario
4 Jul 2027 · PDX → LGB · 1 stop
found yesterday
Portland → Palm Springs
104 km from Ontario
$179
$36 more than flying to Ontario
19 Nov · PDX → PSP · 1 stop
found 3 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 one-way found recently is for 27 Oct. 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