How popular is this Ontario to Portland flight route?

Flights from Ontario to Portland have been viewed 86 times in the past calendar month.

What are the cheapest airlines flying from Ontario to Portland round-trip?

Cheapflights users have booked flights from Ontario to Portland round-trip from $126. Another airline that can offer you cheap pricing is Frontier. Users have found that Southwest is 36% cheaper than the other options available to this destination.

How far ahead should I book a flight from Ontario to Portland?

The price you pay for your flight from Ontario to Portland may vary depending on when you book. For the best chance of a lower fare, look to book 83 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Ontario to Portland?

Currently, November is the cheapest month in which you can book a flight from Ontario to Portland (average of $277). Flying from Ontario to Portland in March is currently the most expensive (average of $368). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from Ontario to Portland?

Travelers seeking maximum savings on their Ontario to Portland flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Ontario to Portland

The most flights from ONT to PDX are scheduled on a Monday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

In terms of precipitation, rainfall in Portland ranges from 0.7 - 5.6 inches per month. November is typically the wettest month, when rainfall can reach 5.6 in. July is typically the driest time to visit Portland when rainfall is around 0.7 in.

If weather is an important factor for your trip to Portland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

What are the cheapest flights from Ontario to Portland?

On average you can expect to pay $379 for a flight from Ontario to Portland. The cheapest flight overall is $62 while the most popular route, (Ontario - Portland) is currently priced at $133.

What are the most reliable airlines from Ontario to Portland?

Before booking your flight to Portland from Ontario, check out the most reliable airlines to get you to your destination on time: Alaska Airlines (92%), Horizon Air (92%), Hawaiian Airlines( 89%).

What are the most popular airlines that fly from Ontario to Portland?

Before booking your flight from Ontario to Portland check out the most popular airlines for this route: Alaska Airlines, Delta or Frontier.

What is the cheapest day to fly round-trip from Ontario to Portland?

Flights from Ontario to Portland are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Portland.

How far in advance should I book a flight from Ontario to Portland?

Find a great deal and save up to 82% by booking at least 33 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ontario to Portland within the next two weeks, with the cheapest ticket starting at $200.

What is the cheapest month to fly from Ontario to Portland?

Our data shows that January tends to be the cheapest month to fly to Portland from Ontario. Users have commonly found prices around $192 for the month, but tickets can be as low as $54. Due to multiple factors, prepare for potentially higher prices in November.

What is the cheapest time of day to fly from ONT to PDX?

It’s typically best to fly out from Ontario to Portland at noon. Doing so could potentially save you 37% on the flight price compared to flying in the morning, which is usually more expensive.

What airports do I use to fly from Ontario to Portland?

If you wish to fly to Portland from Ontario, then you need to book flights from Ontario to Portland. There are 7 flights from Ontario (ONT) to Portland (PDX) per day to choose from. Flights to Portland from Ontario are available from 7 different airlines, which means you should have some options if you want to compare airfare deals. 2h 18m is how long a nonstop flight from Ontario to Portland typically takes.

Can I find deals for flights from Ontario to Portland that include hotel bookings?

Yes. In addition to deals on Ontario to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to Portland?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Portland.

Can I find deals for business class flights from Ontario to Portland?

Yes. Cheapflights offers flight deals from Ontario to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$63+ Flights from Ontario to Portland

Round-trip from	$126 (Southwest)
One-way from	$63 (Southwest)
Popular in	March
Cheapest in	September
Average price	$158
Good round-trip deal	$138 or less
Good one-way deal	$104 or less

Wed 9/31:55 pmONT - PDX

1 stop5h 55mSouthwest

Wed 9/107:00 amPDX - ONT

1 stop6h 20mSouthwest

Deal found 8/6

$126

Mon 8/182:31 pmONT - PDX

Nonstop2h 18mFrontier

Mon 8/257:04 pmPDX - ONT

Nonstop2h 23mFrontier

Deal found 8/6

$127

Fri 11/78:25 amONT - PDX

Nonstop2h 26mFrontier

Sun 11/96:40 pmPDX - ONT

Nonstop2h 22mFrontier

Deal found 8/6

$128

Fri 10/248:32 amONT - PDX

Nonstop2h 26mFrontier

Mon 10/277:30 pmPDX - ONT

Nonstop2h 22mFrontier

Deal found 8/6

$132

Fri 9/58:07 amONT - PDX

Nonstop2h 26mFrontier

Mon 9/87:17 pmPDX - ONT

Nonstop2h 21mFrontier

Deal found 8/6

$133

Fri 9/268:07 amONT - PDX

Nonstop2h 26mFrontier

Sun 9/287:17 pmPDX - ONT

Nonstop2h 21mFrontier

Deal found 8/5

$134

Fri 10/108:32 amONT - PDX

Nonstop2h 26mFrontier

Sun 10/127:30 pmPDX - ONT

Nonstop2h 22mFrontier

Deal found 8/6

$137

Fri 9/58:07 amONT - PDX

Nonstop2h 26mFrontier

Sun 9/77:17 pmPDX - ONT

Nonstop2h 21mFrontier

Deal found 8/5

$138

Fri 9/128:07 amONT - PDX

Nonstop2h 26mFrontier

Sun 9/147:17 pmPDX - ONT

Nonstop2h 21mFrontier

Deal found 8/7

$139

Sun 10/198:25 amONT - PDX

Nonstop2h 26mFrontier

Mon 10/206:43 pmPDX - ONT

Nonstop2h 22mFrontier

Deal found 8/6

$140

Sun 8/318:18 amONT - PDX

Nonstop2h 24mFrontier

Fri 9/57:17 pmPDX - ONT

Nonstop2h 21mFrontier

Deal found 8/5

$146

Wed 9/32:45 pmONT - PDX

1 stop7h 35mSouthwest

Sun 9/76:40 amPDX - ONT

1 stop3h 50mSouthwest

Deal found 8/5

$147

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$45	Average$96	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$60	Average$142	FlexibilityNo cancel fee	On-time62%
Hawaiian Airlines	Cheapest$108	Average$247	FlexibilityNo cancel fee	On-time85%
Delta	Cheapest$137	Average$228	FlexibilityNo cancel fee	On-timeN/A
Alaska Airlines	Cheapest$156	Average$260	FlexibilityNo cancel fee	On-time75%
Southwest	Cheapest$156	Average$270	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$177	Average$264	FlexibilityNo cancel fee	On-time69%

$63+ Cheap flights from Ontario to Portland (ONT - PDX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Portland with Cheapflights

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Cheapflights Tip: The best prices from Ontario to Portland are usually found in September or October, booked 83 days in advance, depart on a Friday or Saturday and return on a Friday

Cheap flight deals from Ontario to Portland

Round-trip from

One-way from

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Find flight deals from Ontario to Portland

Cheapest flights from Ontario to PortlandExplore the most affordable flight options available from Ontario to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 7, 2025.

Explore the most affordable flight options available from Ontario to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 7, 2025.

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Use the filters below to find and compare flights from Ontario to Portland that are best for you.

The best insider tips for Ontario to Portland flights

Cheapflights partnered with top experts to bring you the best recommendations for your Ontario to Portland trip

Airlines

Frontier

Alaska Airlines

Airports

ONT

PDX

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Best time to book a flight from Ontario to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Portland

How far ahead should I book a flight from Ontario to Portland?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Portland. Price data was last updated on August 1, 2025.

What is the cheapest month to book a flight from Ontario to Portland?

What is the cheapest time of day to fly from ONT to PDX?

Find hourly flight availability from Ontario to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 7, 2025.

What is the cheapest day to fly from Ontario to Portland?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Portland. Price data was last updated on August 3, 2025.

Weekly flight availability from Ontario to Portland

Explore weekly flight availability from Ontario to Portland. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 7, 2025.

Reviews of airlines servicing Portland

Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Ontario to Portland. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airports do I use to fly from Ontario to Portland?

How popular is this Ontario to Portland flight route?

What are the cheapest airlines flying from Ontario to Portland round-trip?

What are the most reliable airlines from Ontario to Portland?

What are the cheapest flights from Ontario to Portland?

Can I find deals for flights from Ontario to Portland that include hotel bookings?

How can I find direct flights from Ontario to Portland?

Can I find deals for business class flights from Ontario to Portland?

What is the cheapest month to book a flight from Ontario to Portland?

Traveling to a place near Portland?

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Alternative routes for Ontario to Portland

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Top 7 airlines flying from Ontario to Portland

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Cheapest flights from Ontario to Portland
Explore the most affordable flight options available from Ontario to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 7, 2025.