Cheap Flight Tickets from Portland (PDX) to Ontario (ONT), Starting at $178

Good to Know: Cheapest and Fastest PDX - ONT Flights

Useful information for finding best airline tickets from Portland International to Ontario International on your next trip.

Cheapest Round Trip Flight

$178

F9 Frontier Airlines • 1 stop • 19h 4m

Nov 01 – Nov 04

The cheapest round trip flight from Portland to Ontario (PDX-ONT-PDX) is currently $178

🔍 Search Flights

Cheapest Direct Flight

$655

AS Alaska Airlines • nonstop • 3h 41m

Oct 31

The cheapest nonstop flight from Portland to Ontario (PDX-ONT) is currently $655

🔍 Search Flights

Fastest Flight

3h 41m

The fastest nonstop flight from Portland to Ontario (PDX-ONT) takes 3h 41m

Top Airlines Flying from Portland to Ontario

Delta Airline, DL

Delta Airlines

United Airlines, UA

United Airlines

Southwest Airlines-WN

Southwest Airlines

Alaska Airlines -AS

Alaska Airlines

Latest Flight Deals from Portland (PDX) to Ontario (ONT)

Compare and book low fare round-trip air tickets from Portland to Ontario. Ideal for travelers with confirmed return itineraries.

Nov 01 - Nov 04, Economy
F9
Portland → Ontario
19h 4m
12:07 PM - 11:51 PM • 1 stop
F9
Portland → Ontario
30h 12m
5:07 PM - 11:19 AM • 1 stop
$178
Frontier Airlines
Nov 01 - Nov 04, Economy
UA
Portland → Ontario
7h 14m
10:59 AM - 3:33 PM • 1 stop
UA
Portland → Ontario
7h 25m
4:17 PM - 9:02 PM • 1 stop
$337
United Airlines
Nov 01 - Nov 04, Economy
UA
Portland → Ontario
7h 15m
3:40 PM - 8:15 PM • 1 stop
UA
Portland → Ontario
8h 29m
9:25 AM - 2:34 PM • 1 stop
$337
United Airlines
Nov 01 - Nov 04, Economy
DL
Portland → Ontario
7h 34m
5:49 PM - 10:43 PM • 1 stop
DL
Portland → Ontario
3h 39m
8:00 PM - 10:19 PM • nonstop
$677
Delta Airlines
Nov 01 - Nov 04, Economy
DL
Portland → Ontario
7h 23m
12:29 PM - 5:12 PM • 1 stop
DL
Portland → Ontario
3h 39m
8:00 PM - 10:19 PM • nonstop
$677
Delta Airlines
Nov 01 - Nov 04, Economy
DL
Portland → Ontario
9h 7m
11:25 AM - 5:12 PM • 1 stop
DL
Portland → Ontario
3h 39m
8:00 PM - 10:19 PM • nonstop
$677
Delta Airlines

Fly from Portland to Ontario with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Portland to Ontario? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Portland to Ontario Flights

What are the airports in Portland?
PDX
What’s the most popular airline flying from PDX to ONT?
The most popular airline flying from Portland to Ontario are
Can I fly from PDX to ONT non-stop?
Yes, you can fly PDX to ONT non-stop on
Which airlines fly nonstop between Portland and Ontario?
The non-stop flights between Portland and Ontario are .
What’s the earliest departure time from PDX to ONT Airport?
The earliest flight leaves PDX at 8:28 am and lands in ONT - Ontario International
What are the airports in Ontario?
ONT
Can I make changes to my Portland to Ontario flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from PDX to ONT?
Read the fare rules of the Portland to Ontario air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Portland and Ontario?
operate flights between Portland and Ontario
How long does a flight from Portland to Ontario take?
It takes approximately 2 hour to fly non-stop from PDX to ONT, which is 838.45 miles by air.
Which airlines provide the cheapest flights from Portland (PDX) to Ontario (ONT) ?
In the past couple of days, the cheapest tickets to ONT from PDX were found on UA : USD 337
Do I need a passport to fly between PDX and ONT?
No
What’s the latest departure time from PDX to ONT ?
The last flight leaves PDX at 5:49 pm

Portland (PDX) to Ontario (ONT): Airport Information

Origin Airport Portland International , Portland, US
Destination Airport Ontario International , Ontario, US
Distance 838 miles

More Flight Options for Portland (PDX) and Ontario (ONT)

Why Fareleaders for PDX to ONT Plane Tickets

Lowest Prices
Lowest Prices
Uncover the best deals on Portland to Ontario flights by comparing fares from hundreds of airlines and agencies.
New Deals
New Deals Everyday
Get the best prices on PDX to ONT flights—we update our fares daily so you never miss a saving.
Best Travel Options
No Service Fees
Compare hundreds of Portland to Ontario flights and secure the best deals—we never add any service fees.
Get Fare Drop Alert
Be the first to know when fares drop for the Portland (PDX) to Ontario (ONT)
Terms and Conditions*