Ontario to Portland flights
The cheapest round trip we found from Ontario to Portland is $153 (Feb 1 – 3, 2027, 1 stop), 38% below the usual $247.
ONT to PDX · Round trip · Economy · Prices per person in USD · Price found (2 days ago)
Cheapest found
Buy now or wait? We're still learning this route. We have 4 days of prices so far and need about a week to say whether to book or wait.
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $268 |
| December 2026 | $163 |
| January 2027 | No fares found yet |
| February 2027 | $153 (cheapest month) |
Cheapest dates in the next 4 months
Round trip, per person-
Feb 1 – 3, 2027 2 nights · leave Mon$153 −38% vs usual$153 −38% vs usual Book
Southwest Airlines 1 stop · 3h 05m -
Dec 4 – 7 3 nights · leave Fri$163 −34% vs usual$163 −34% vs usual Book
Southwest Airlines 1 stop · 4h 10m
-
Nov 14 – 17 3 nights · leave Sat$268 +9% vs usual$268 +9% vs usual Book
Frontier Airlines 1 stop · 5h 18m -
Nov 9 – 13 4 nights · leave Mon$320 +30% vs usual$320 +30% vs usual Book
Frontier Airlines 1 stop · 5h 18m
-
Nov 7 – 10 3 nights · leave Sat$324 +31% vs usual$324 +31% vs usual Book
Frontier Airlines 1 stop · 3h 43m
-
Nov 21 – 24 3 nights · leave Sat$357 +45% vs usual$357 +45% vs usual Book
Frontier Airlines 2 stops · 6h 06m
-
Nov 11 – 14 3 nights · leave Wed$424 +72% vs usual$424 +72% vs usual Book
Frontier Airlines 1 stop · 3h 43m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Plan the rest of your trip
Portland · Feb 1 – 3, 2027- Car rental Economybookings · compare rental companies (opens Economybookings in a new tab)
- Things to do in Portland Klook · tours and tickets (opens Klook in a new tab)
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Good to know
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Flights to Portland from other cities
All flights to Portland Flying the other way? Portland to Ontario from $285
Ontario to Portland: questions
How much does a flight from Ontario to Portland cost?
The cheapest round trip we have found right now is $153, leaving February 1 and returning February 3. The usual price on this route is about $247, so this fare is 38% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Ontario to Portland?
February 2027, with round trips from $153. The most expensive month in our data is November (from $268). Based on the 3 months ahead we have prices for.
Which airports do Ontario to Portland flights use?
Ontario airports include Ontario International (ONT). Portland airports include Portland International (PDX). The prices on this page cover every airport in both cities (ONT and PDX are the city codes).
About this route
We track round-trip economy fares from Ontario (United States) to Portland (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $153, departing February 1 and returning February 3, about 38% below the usual $247. Right now we're following 7 upcoming date combinations on this route. The cheapest month to fly in our data is February, from $153. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.