What is the cheapest airline that flies from Ontario to Portland?

Frontier, Delta, and Southwest are the most popular carriers operating from Ontario to Portland

How many flights depart from Ontario to Portland on average per day?

As of September 2025, there are 4 flights per day flying from Ontario to Portland. The most common time of day flights depart is 10:00AM, with 64% of flights taking off at noon.

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 47% 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 week?

The number of flights available between Ontario and Portland is 34 per week as of September 2025. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.

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 September 2025, 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.

$63 Cheap Flights from Ontario to Portland in 2025/26

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Find the cheapest flights from Ontario to Portland

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

8:25 am - 10:51 amONT-PDX

2h 26mnonstop

12:51 pm - 3:10 pmPDX-ONT

2h 19mnonstop

$108Frontier

Find Deal

Sun, Oct 26 - Fri, Oct 31

8:32 am - 10:58 amONT-PDX

2h 26mnonstop

12:51 pm - 3:10 pmPDX-ONT

2h 19mnonstop

$109Frontier

Find Deal

Mon, Oct 27 - Fri, Oct 31

8:32 am - 10:58 amONT-PDX

2h 26mnonstop

7:30 pm - 9:52 pmPDX-ONT

2h 22mnonstop

$114Frontier

Find Deal

Fri, Oct 24 - Mon, Oct 27

8:07 am - 10:33 amONT-PDX

2h 26mnonstop

7:17 pm - 9:38 pmPDX-ONT

2h 21mnonstop

$120Frontier

Find Deal

Mon, Sep 29 - Mon, Oct 6

4:35 pm - 10:42 pmONT-PDX

6h 07m1 stop

5:26 pm - 10:55 pmPDX-ONT

5h 29m1 stop

$151Delta

Find Deal

Tue, Nov 4 - Sat, Nov 15

5:20 pm - 12:30 amONT-PDX

7h 10m1 stop

9:55 am - 5:10 pmPDX-ONT

7h 15m2 stops

$156Southwest

Find Deal

Tue, Dec 30 - Tue, Jan 6

7:35 am - 2:38 pmONT-PDX

7h 03m1 stop

5:00 pm - 9:20 pmPDX-ONT

4h 20m1 stop

$157Delta

Find Deal

Tue, Oct 28 - Tue, Nov 4

6:03 pm - 8:29 pmONT-PDX

2h 26mnonstop

9:32 pm - 11:56 pmPDX-ONT

2h 24mnonstop

$171Alaska Airlines

Find Deal

Wed, Nov 5 - Sun, Nov 9

7:10 am - 9:30 amONT-PDX

2h 20mnonstop

9:30 pm - 11:51 pmPDX-ONT

2h 21mnonstop

$177Hawaiian Airlines

Find Deal

Sat, Oct 11 - Wed, Oct 15

7:10 am - 9:30 amONT-PDX

2h 20mnonstop

7:37 am - 9:58 amPDX-ONT

2h 21mnonstop

$179Alaska Airlines

Find Deal

Sat, Oct 25 - Sun, Oct 26

Frontier flights from Ontario to Portland

Our best Frontier deals on Ontario to Portland flight tickets

Frontier

Oct 26

ONT8:25 amOntario

2h 26m

PDX10:51 amPortland

Oct 31

PDX12:51 pmPortland

2h 19m

ONT3:10 pmOntario

$108

Find similar

Frontier

Oct 27

ONT8:32 amOntario

2h 26m

PDX10:58 amPortland

Oct 31

PDX12:51 pmPortland

2h 19m

ONT3:10 pmOntario

$109

Find similar

Frontier

Oct 24

ONT8:32 amOntario

2h 26m

PDX10:58 amPortland

Oct 27

PDX7:30 pmPortland

2h 22m

ONT9:52 pmOntario

$114

Find similar

Delta flights from Ontario to Portland

Our best Delta deals on Ontario to Portland flight tickets

Delta

Nov 4

ONT4:35 pmOntario

6h 07m

1 stop

PDX10:42 pmPortland

Nov 15

PDX5:26 pmPortland

5h 29m

1 stop

ONT10:55 pmOntario

$151

Find similar

Delta

Oct 28

ONT7:35 amOntario

7h 03m

1 stop

PDX2:38 pmPortland

Nov 4

PDX5:00 pmPortland

4h 20m

1 stop

ONT9:20 pmOntario

$157

Find similar

Delta

Jan 21

ONT5:05 pmOntario

6h 49m

1 stop

PDX11:54 pmPortland

Jan 31

PDX5:55 amPortland

6h 39m

1 stop

ONT12:34 pmOntario

$167

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sun 10/26

8:25 am-10:51 am

Nonstop2h 26m

Portland

Fri 10/31

12:51 pm-3:10 pm

Nonstop2h 19m

$108

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 10/27

8:32 am-10:58 am

Nonstop2h 26m

Portland

Fri 10/31

12:51 pm-3:10 pm

Nonstop2h 19m

$109

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 10/24

8:32 am-10:58 am

Nonstop2h 26m

Portland

Mon 10/27

7:30 pm-9:52 pm

Nonstop2h 22m

$114

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 9/29

8:07 am-10:33 am

Nonstop2h 26m

Portland

Mon 10/6

7:17 pm-9:38 pm

Nonstop2h 21m

$120

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 11/4

4:35 pm-10:42 pm

1 stop6h 07m

Portland

Sat 11/15

5:26 pm-10:55 pm

1 stop5h 29m

$151

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 12/30

5:20 pm-12:30 am

1 stop7h 10m

Portland

Tue 1/6

9:55 am-5:10 pm

2 stops7h 15m

$156

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 10/28

7:35 am-2:38 pm

1 stop7h 03m

Portland

Tue 11/4

5:00 pm-9:20 pm

1 stop4h 20m

$157

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 11/5

6:03 pm-8:29 pm

Nonstop2h 26m

Portland

Sun 11/9

9:32 pm-11:56 pm

Nonstop2h 24m

$171

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 10/11

7:10 am-9:30 am

Nonstop2h 20m

Portland

Wed 10/15

9:30 pm-11:51 pm

Nonstop2h 21m

$177

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 10/25

7:10 am-9:30 am

Nonstop2h 20m

Portland

Sun 10/26

7:37 am-9:58 am

Nonstop2h 21m

$179

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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

Prices

Airlines

Other information

What is the cheapest month to fly to Portland?

The cheapest month to fly to Portland from Ontario is in October. Flight prices, which tend to average around $166, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in October, then you should wait until January to fly from Ontario, when ticket prices are also cheap, with an average price of $176.

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 $202. 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 $238.

What is the cheapest time of day to depart on your flight to Portland?

The cheapest time of day to fly to Portland is at noon when flights can be purchased for as low as $204. In the evening is when there is more demand to fly to Portland, so prices are often more expensive at around $241 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 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 $206 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 $162 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.

How have Ontario to Portland flight prices changed over time?

As of September 2025, prices for Ontario to Portland flights are approximately 53% cheaper when compared to flights at the same time last year.

When to book flights from Ontario to Portland

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Portland according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

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

Best Price Found	$117
Fastest flight time	2h 18m
Direct flights	Every day
Airports in Portland	1 airport

The best one-way flight to Portland from Ontario in the past 72 hours is $117. The best round-trip flight deal from Ontario to Portland found on momondo in the last 72 hours is $143.

The fastest flight from Ontario to Portland takes 2h 18m

Direct flights go from Ontario to Portland every day.

There is 1 airport near Portland: Portland (PDX)

Search flight deals

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 18m.
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 September 2025, 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 Embraer 175, representing 22.93% of all bookings. The subsequent popular models are Boeing 737-900 Passenger/BBJ3 (winglets) at 13.43%, Boeing 737 MAX 8 at 11.11%, and Boeing 737 MAX 9 at 10.59%.
What is the most popular airline from Ontario to Portland?
Based on momondo bookings for flights between Ontario and Portland, the leading airline is Frontier, making up 48% of the total bookings. Other popular airlines include Alaska Airlines with 41%, Hawaiian Airlines with 7%, and Southwest 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
Frontier	PriceFrom $72	Free Cancellation	Rating 5.8 3,173 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $98	Free Cancellation	Rating 7.8 2,729 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $137	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
United Airlines	PriceFrom $153	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Southwest	PriceFrom $156	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $156	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights

Alaska Airlines Flights From Ontario to Portland
Alaska Airlines operates around 16 flights from Ontario to Portland every week. The average price of these flights found in the last 72 hours has been $271, but momondo users have found Alaska Airlines deals from Ontario to Portland from as low as $156 round-trip. Alaska Airlines has been scored 8.0/10 in 10,000 reviews.
Hawaiian Airlines Flights From Ontario to Portland
Hawaiian Airlines is also a popular choice for this route. Hawaiian Airlines flight deals for Ontario to Portland start from as low as $98 round-trip, depending on your selected dates, with average Hawaiian Airlines deals seen on momondo around $247. Hawaiian Airlines operates 18 flights to Portland from Ontario in an average week. Users have rated it 7.8/10 across 2,729 reviews.

Lincoln City

Seaside

Cannon Beach

Vancouver

Salem

Astoria

Long Beach

Depoe Bay

Rockaway Beach

Beaverton

Hillsboro

Hood River

Gresham

McMinnville

Longview

Tigard

The Dalles

Pacific City

Tillamook

Manzanita

Why 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.

An easier way to manage your Portland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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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 10/10. 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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Find the cheapest flights from Ontario to Portland

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Frontier flights from Ontario to Portland

Our best Frontier deals on Ontario to Portland flight tickets

Delta flights from Ontario to Portland

Our best Delta deals on Ontario to Portland flight tickets

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

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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 cheapest month to fly to Portland?

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 $202. 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 $238.

What is the cheapest time of day to depart on your flight to Portland?

The cheapest time of day to fly to Portland is at noon when flights can be purchased for as low as $204. In the evening is when there is more demand to fly to Portland, so prices are often more expensive at around $241 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 to Portland?

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.

How have Ontario to Portland flight prices changed over time?

As of September 2025, prices for Ontario to Portland flights are approximately 53% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Ontario to Portland?

Frontier, Delta, and Southwest are the most popular carriers operating from Ontario to Portland

What airlines fly to Portland?

How many flights depart from Ontario to Portland on average per day?

As of September 2025, there are 4 flights per day flying from Ontario to Portland. The most common time of day flights depart is 10:00AM, with 64% 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 34 per week as of September 2025. The most frequent departure day is Mon, with 18% 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

Best Price Found

Fastest flight time

Direct flights

Airports in Portland

How far is Ontario to Portland by plane?

When did momondo last update prices for flights from Ontario Airport to Portland Airport?

How many operators does momondo search for flights from Ontario Airport to Portland Airport?

How old do you have to be to fly from Ontario Airport to Portland Airport?

What documentation or ID do you need to fly to Portland Airport?

What is the most popular plane model from Ontario to Portland?

What is the most popular airline from Ontario to Portland?

Best airlines flying from Ontario to Portland

Compare and see reviews for airlines that fly from Ontario to Portland with momondo

Alaska Airlines Flights From Ontario to Portland

Hawaiian Airlines Flights From Ontario to Portland

Traveling to a place near Portland?

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Portland?

Can I find flights from Ontario to Portland with flexible booking policies on momondo?

How can momondo help me find flights from Ontario to Portland?

I’m not ready to book a flight from Ontario to Portland right now. Can momondo alert me if prices change?

An easier way to manage your Portland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Oregon