Cheap flights from Ontario to Portland from $63
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Portland departing on 10/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Fly from
Fly to
Route
Depart
Return
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Sat 11/21
10:47 pm-5:34 pm
1 stop18h 47m
Portland
Sat 11/28
10:10 pm-8:30 am
1 stop10h 20m
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Thu 12/17
6:20 am-3:40 pm
1 stop9h 20m
Portland
Mon 12/21
6:04 pm-6:15 am
1 stop12h 11m
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Thu 10/22
6:15 pm-11:30 pm
1 stop5h 15m
Portland
Tue 10/27
10:45 am-7:40 pm
2 stops8h 55m
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Fri 1/8
3:00 pm-9:55 pm
2 stops6h 55m
Portland
Sun 1/10
5:05 pm-8:45 pm
1 stop3h 40m
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Sat 12/12
6:17 pm-8:52 pm
Nonstop2h 35m
Portland
Mon 12/14
1:22 pm-6:31 pm
1 stop5h 09m
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Thu 12/17
6:20 am-3:40 pm
1 stop9h 20m
Portland
Tue 1/5
3:00 pm-5:17 pm
Nonstop2h 17m
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Wed 10/21
9:45 am-4:10 pm
1 stop6h 25m
Portland
Sat 10/24
5:15 pm-10:11 pm
1 stop4h 56m
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Wed 10/21
6:20 am-11:49 am
1 stop5h 29m
Portland
Sat 10/24
5:49 pm-10:43 pm
1 stop4h 54m
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Wed 12/9
6:01 pm-8:31 pm
Nonstop2h 30m
Portland
Sat 12/12
10:53 am-4:56 pm
1 stop6h 03m
OntarioPortland
ONT Ontario - PDX Portland
ONTPDX
Ontario
Wed 1/6
11:36 am-6:50 pm
1 stop7h 14m
Portland
Tue 1/12
5:40 pm-8:02 pm
Nonstop2h 22m
See travel insights to Portland from
How to get the cheapest flight ticket from Ontario to Portland
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Ontario and Portland?
Prices are currently low for flights on this route.
Typical prices usually range from $269 to $367.The lowest price recently found on this route was $260.
What is the cheapest month to fly to Portland?
The cheapest month to fly to Portland from Ontario is in February. Flight prices, which tend to average around $219, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in February, then you should wait until April to fly from Ontario, when ticket prices are also cheap, with an average price of $242.
What is the cheapest day to depart on your flight to Portland?
The cheapest day to depart on your flight to Portland is on a Saturday when prices can be found for as low as $267. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Sunday, with ticket prices averaging around $308.
What is the cheapest time of day to depart on your flight to Portland?
The cheapest time of day to fly to Portland is in the afternoon when flights can be purchased for as low as $279. At noon is when there is more demand to fly to Portland, so prices are often more expensive at around $309 per ticket.
What is the cheapest Ontario to Portland flight route?
Fly from Ontario to Portland for the best Ontario - Portland flight prices
How far in advance should I book a flight from Ontario to Portland?
You are more likely to see cheaper flights to Portland from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $288 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from Ontario for as low as $173 on momondo.
What cabin class options are available on Ontario to Portland flights?
There are 4 cabin classes available to choose from on Ontario to Portland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on Ontario to Portland flights?
You could potentially save up to 4% on your flight if you consider stops on a Ontario to Portland flight.
How have Ontario to Portland flight prices changed over time?
As of October 2026, prices for Ontario to Portland flights are approximately 32% more expensive when compared to flights at the same time last year.
What is the cheapest airline that flies from Ontario to Portland?
Southwest and Frontier are the most popular carriers operating from Ontario to Portland
What airlines fly to Portland?
Alaska Airlines, Frontier and Delta are the top three most popular airlines that fly to Portland from Ontario according to our data. Alaska Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Portland. Keep in mind that there are 8 different airlines that fly to Portland on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ontario to Portland on average per day?
As of October 2026, there are 1 flights per day flying from Ontario to Portland. The most common time of day flights depart is 7:00AM, with 80% of flights taking off at noon.
How many flights depart from Ontario to Portland on average per week?
The number of flights available between Ontario and Portland is 9 per week as of October 2026. The most frequent departure day is Wed, with 33% of weekly flights leaving on this day.
When to book flights from Ontario to Portland
Cheap Ontario to Portland (ONT to PDX) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Portland
Frequently asked questions about flying from Ontario to Portland
How far is Ontario to Portland by plane?
Ontario and Portland are 834.5 mi apart from one another. A reasonable flight in good conditions will take 2h 16m.
When did momondo last update prices for flights from Ontario Airport to Portland Airport?
Prices for flights from Ontario Airport to Portland Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Portland Airport?
As of October 2026, there are 6 operators available to choose from for flights from Ontario Airport to Portland Airport.
How old do you have to be to fly from Ontario Airport to Portland Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Portland Airport.
What documentation or ID do you need to fly to Portland Airport?
The required travel and health documents for your Portland Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portland Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Ontario to Portland?
momondo data reveals that the most frequently booked plane model on the route from Ontario to Portland is Boeing 737-800 Passenger/BBJ2 (winglets), representing 27.79% of all bookings. The subsequent popular models are Boeing 737-900 Passenger/BBJ3 (winglets) at 11.55%, Airbus A320neo at 7.44%, and Airbus A319 at 7.24%.
What is the most popular airline from Ontario to Portland?
Based on momondo bookings for flights between Ontario and Portland, the leading airline is Alaska Airlines, making up 76% of the total bookings. Other popular airlines include Southwest with 10%, Frontier with 6%, and United Airlines with 3%.
Best airlines flying from Ontario to Portland
Compare and see reviews for airlines that fly from Ontario to Portland with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $90 | Free Cancellation | Rating 7.8 8,636 reviews | |||
| PriceFrom $98 | Free Cancellation | Rating 5.6 2,551 reviews | |||
| PriceFrom $157 | Free Cancellation | Rating 7.9 13,036 reviews | |||
| PriceFrom $188 | Free Cancellation | Rating 7.4 10,316 reviews | |||
| PriceFrom $205 | Free Cancellation | Rating 7.8 2,806 reviews | |||
| PriceFrom $206 | Free Cancellation | Rating 7.9 4,220 reviews |
Southwest Flights From Ontario to Portland
Southwest operates around 2 flights from Ontario to Portland every week. The average price of these flights found in the last 72 hours has been $296, but momondo users have found Southwest deals from Ontario to Portland from as low as $206 round-trip. Southwest has been scored 7.9/10 in 4,218 reviews.
Alaska Airlines Flights From Ontario to Portland
Alaska Airlines is also a popular choice for this route. Alaska Airlines flight deals for Ontario to Portland start from as low as $157 round-trip, depending on your selected dates, with average Alaska Airlines deals seen on momondo around $313. Alaska Airlines operates 7 flights to Portland from Ontario in an average week. Users have rated it 7.9/10 across 13,034 reviews.
Traveling to a place near Portland?
Book flights to Portland if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Ontario to Portland?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Portland. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Ontario to Portland with flexible booking policies on momondo?
Yes. All flights to Portland from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Ontario to Portland?
Once you have performed a search for Ontario to Portland flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Ontario to Portland right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Ontario to Portland now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Portland and let you know when they change.