When is the best time to book a flight from Portland to Ontario?

Want to find the lowest fares by day and time flying from Portland to Ontario on Alaska Airlines or Hawaiian Airlines? Check out our flight search widget.

Can I earn points on my flight to Ontario?

Yes, with Atmos™ Rewards you can earn points on flights to 1000+ destinations worldwide through the growing network of Alaska and Hawaiian Airlines. Not an Atmos™ Rewards member yet? Learn more and join today.

Can I rent a car when I arrive at LA/Ontario International Airport?

Yes, you can rent a car at LA/Ontario International Airport. Check availability and book now

Where can I find the status of my flight to Ontario?

You can check the status of your upcoming Alaska Airlines flight on our flight schedule page.

Where can I find answers to questions about flying with Alaska Airlines?

Visit the Alaska Airlines Help Center to quickly browse our help pages by category to find the information you need.

Can I change or cancel my Alaska Airlines flight to Ontario?

Yes, you can review, modify, or cancel a reservation from our Manage Your Reservation tool. You can learn more about our policy for changing or cancelling a reservation here.

Flights from Portland (PDX) to Ontario (ONT) on Alaska Airlines

1 Passenger

From

Departure

Return

Lowest fares from Portland to Ontario

From

Nov 2026

$269*

Seen: 18 hours ago

Flight Type One Way|Saver

Dec 2026

$144*

Seen: 18 hours ago

Flight Type One Way|Saver

Jan 2027

$144*

Seen: 18 hours ago

Flight Type One Way|Saver

NOV

DEC

One-way low-fare flights Portland to Ontario.*

From

Budget

Cabin Class

One-way low-fare flights Portland to Ontario.*
From	To	Fare Type	Dates	Price
Portland (PDX)	Ontario (ONT)	One-way \| Saver	Depart: Feb 10, 2027	From $144 Seen: 18 hours ago
Portland (PDX)	Ontario (ONT)	One-way \| Saver	Depart: Feb 17, 2027	From $144 Seen: 18 hours ago
Portland (PDX)	Ontario (ONT)	One-way \| Saver	Depart: Feb 27, 2027	From $144 Seen: 18 hours ago
Portland (PDX)	Ontario (ONT)	One-way \| Saver	Depart: Mar 6, 2027	From $144 Seen: 18 hours ago
Portland (PDX)	Ontario (ONT)	One-way \| Saver	Depart: Jan 5, 2027	From $144 Seen: 18 hours ago
Portland (PDX)	Ontario (ONT)	One-way \| Saver	Depart: Jan 6, 2027	From $144 Seen: 18 hours ago
Portland (PDX)	Ontario (ONT)	One-way \| Saver	Depart: Jan 13, 2027	From $144 Seen: 18 hours ago
Portland (PDX)	Ontario (ONT)	One-way \| Saver	Depart: Jan 16, 2027	From $144 Seen: 18 hours ago

*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

Frequently Asked Questions on flights from Portland (PDX) to Ontario (ONT)

When is the best time to book a flight from Portland to Ontario?: Want to find the lowest fares by day and time flying from Portland to Ontario on Alaska Airlines or Hawaiian Airlines? Check out our flight search widget.
Can I earn points on my flight to Ontario?: Yes, with Atmos™ Rewards you can earn points on flights to 1000+ destinations worldwide through the growing network of Alaska and Hawaiian Airlines. Not an Atmos™ Rewards member yet? Learn more and join today.
Can I rent a car when I arrive at LA/Ontario International Airport?: Yes, you can rent a car at LA/Ontario International Airport. Check availability and book now
Where can I find the status of my flight to Ontario?: You can check the status of your upcoming Alaska Airlines flight on our flight schedule page.
Where can I find answers to questions about flying with Alaska Airlines?: Visit the Alaska Airlines Help Center to quickly browse our help pages by category to find the information you need.
Can I change or cancel my Alaska Airlines flight to Ontario?: Yes, you can review, modify, or cancel a reservation from our Manage Your Reservation tool. You can learn more about our policy for changing or cancelling a reservation here.

Flights from Portland (PDX) to Ontario (ONT) on Alaska Airlines

Lowest fares from Portland to Ontario

One-way low-fare flights Portland to Ontario.*

Frequently Asked Questions on flights from Portland (PDX) to Ontario (ONT)

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