Cheap flights from Portland to Ontario from $48
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Ontario departing on 5/23. 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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How to get the cheapest flight ticket from Portland to Ontario
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 cheapest month to fly to Ontario?
In general, September is the cheapest month to fly from Portland to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $124. If you aren’t able to travel during the month of September, then book flights to Ontario from Portland during August instead. Flights to Ontario in August, while not as cheap as those in September, still average around $138.
What is the cheapest day to depart on your flight to Ontario?
The cheapest day to depart on your flight to Ontario is on a Saturday when prices can be found for as low as $138. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Portland to Ontario for around $214.
What is the cheapest time of day to depart on your flight to Ontario?
In the afternoon is the cheapest time of day to fly from Portland to Ontario when you can find flight prices for as low as $148. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $185 on average. Flights to Ontario from Portland in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.
What is the cheapest Portland to Ontario flight route?
Fly from Portland to Ontario for the best Portland - Ontario flight prices
How far in advance should I book a flight to Ontario?
You are more likely to see cheaper flights to Ontario from Portland when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $200 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Portland for as low as $134 on momondo.
What cabin class options are available on Portland to Ontario flights?
There are 3 cabin classes available to choose from on Portland to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Portland to Ontario?
Frontier, Alaska Airlines, and Southwest are the most popular carriers operating from Portland to Ontario
What airlines fly to Ontario?
Alaska Airlines, Frontier and Delta are the top three most popular airlines that fly to Ontario from Portland according to our data. Alaska Airlines is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 9 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.
How many flights depart from Portland to Ontario on average per day?
As of April 2025, 6 flights take off from Portland and land in Ontario each day. The most common flight departure time for this route is 9:00PM, with 36% of daily flights taking off in the evening.
How many flights depart from Portland to Ontario on average per week?
As of April 2025, there are 47 flights per week flying from Portland to Ontario. The most common day of the week flights depart is Tue, with 17% of flights taking off on this day.
When to book flights from Portland to Ontario
Cheap Portland to Ontario (PDX to ONT) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Portland to Ontario
How far is Portland to Ontario by plane?
The straight-line distance from Portland to Ontario is 834.5 mi. By plane, this route typically takes 2h 16m.
When did momondo last update prices for flights from Portland Airport to Ontario Airport?
Prices for flights from Portland Airport to Ontario Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Portland Airport to Ontario Airport?
The number of operators available for flights from Portland Airport to Ontario Airport is 7 as of April 2025.
How old do you have to be to fly from Portland Airport to Ontario 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 Portland Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Portland to Ontario?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Portland to Ontario is Embraer 175 (18.60% of total bookings). The next most popular plane models are Boeing 737-900 Passenger/BBJ3 (winglets) (16.88%), Airbus A320neo (16.55%), and Boeing 737-800 Passenger/BBJ2 (winglets) (11.32%).
What is the most popular airline from Portland to Ontario?
momondo data reveals that the most frequently booked airline on the route from Portland to Ontario is Frontier, representing 57% of all bookings. The subsequent popular airlines are Alaska Airlines at 34%, Southwest at 3%, and Delta at 2%.
Best airlines flying from Portland to Ontario
Compare and see reviews for airlines that fly from Portland to Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $58 | Free Cancellation | Rating 5.9 3,283 reviews | |||
| PriceFrom $68 | Free Cancellation | Rating 6.3 7,941 reviews | |||
| PriceFrom $98 | Free Cancellation | Rating 8.0 7,919 reviews | |||
| PriceFrom $128 | Free Cancellation | Rating 7.9 2,393 reviews | |||
| PriceFrom $156 | Free Cancellation | Rating 8.0 9,927 reviews | |||
| PriceFrom $171 | Free Cancellation | Rating 7.4 8,685 reviews | |||
| PriceFrom $192 | Free Cancellation | Rating 8.0 4,287 reviews |
Alaska Airlines Flights From Portland to Ontario
Alaska Airlines flies from Portland to Ontario around 19 times per week, with 9,918 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Portland to Ontario in the last 72 hours was $156 (round-trip), much lower than the average airfare cost of $279 for Alaska Airlines flights on this route.
Southwest Flights From Portland to Ontario
Southwest (8.0/10 from 4,286 reviews) operates around 2 flights from Portland to Ontario in any given week. The average Southwest airfare for this route is around $323, with deals from around $192 rare but found on momondo. Referenced prices are for round-trip Portland to Ontario flight searches in the last 72 hours.
Why use momondo?
Why should I use momondo to find a flight deal from Portland to Ontario?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portland to Ontario for you.
Can I find flights from Portland to Ontario with flexible booking policies on momondo?
All flight searches from Portland to Ontario on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Portland to Ontario?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Portland to Ontario.
I’m not ready to book a flight from Portland to Ontario right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Portland to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.