Find Cheap Flights from Portland to Ontario (PDX - LAX)

Flights overview

Useful information for finding cheap flights from Portland to Ontario and booking your next trip

Cheapest round-trip flights	$140	Frontier 1 stop 12 hr Sat, May 23 — Sun, May 24	The cheapest round-trip flight from Portland to Ontario is currently $140
Cheapest one-way flight	$90	Frontier 1 stop 7 hr Tue, Jun 2	The cheapest one-way flight from Portland to Ontario is currently $90
Cheapest nonstop flights	$207	Alaska Nonstop 3 hr Sat, May 30 — Mon, Jun 1	The cheapest nonstop round-trip flight from Portland to Ontario is currently $207
Last-minute weekend getaway	$315	Frontier 1 stop 22 hr Thu, May 7 — Sun, May 10	The cheapest last-minute weekend getaway from Portland to Ontario is currently $315
Cheapest business class flights	$447	Alaska Nonstop 3 hr Sat, Jun 6 — Sun, Jun 7	The cheapest business class round-trip flight from Portland to Ontario is currently $447

Fastest flight	2 hr 17 min	The fastest nonstop flight from Portland to Ontario takes 2 hr 17 min
Nonstop flights	Every day	There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from Portland to Ontario is typically July. The most expensive month to fly is typically April.

July Cheapest	Typical prices: $95–185
April Most expensive	Typical prices: $175–355

Popular airlines from Portland to Ontario

Alaska

Nonstop

from $207

Typical price: $185–430

20 weekly nonstop flights

PDX - ONT Every day

258 weekly connecting flights

PDX - ONT Every day
Southwest

from $227

Typical price: $180–385

702 weekly connecting flights

PDX - ONT Every day
Delta

from $247

Typical price: $205–500

207 weekly connecting flights

PDX - ONT Every day
United

from $227

Typical price: $200–480

134 weekly connecting flights

PDX - ONT Every day
American

from $320

Typical price: $255–580

114 weekly connecting flights

PDX - ONT Every day
Frontier

from $140

Typical price: $140–335

15 weekly connecting flights

PDX - ONT Every Mon, Thu, Fri, Sun

Popular airports near Portland

Portland International Airport (PDX)

Portland United States 20 min 6 mi
Seattle-Tacoma International Airport (SEA)

Seattle United States 2 hr 37 min 134 mi
Eugene Airport (EUG)

Eugene United States 1 hr 54 min 99 mi
Redmond Municipal Airport (RDM)

Redmond United States 3 hr 114 mi

Popular airports near Ontario

Ontario International Airport (ONT)

Ontario United States 11 min 2 mi
Los Angeles International Airport (LAX)

Los Angeles United States 1 hr 7 min 44 mi
Tijuana International Airport (TIJ)

Tijuana Mexico 2 hr 16 min 112 mi
San Diego International Airport (SAN)

San Diego United States 1 hr 50 min 95 mi

Frequently asked questions about flying from Portland to Ontario

The cheapest flights from Portland to Ontario are usually in July. Typical ticket prices in July range from $95 to $185.

The cheapest round-trip flight from Portland to Ontario recently found on Google Flights was with Frontier from $140. The cheapest one-way flight was with Frontier from $90.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest Alaska flight from Portland to Ontario is $207, flying from May 30 to Jun 1.
The cheapest Southwest flight from Portland to Ontario is $227, flying from May 30 to May 31.
The cheapest Delta flight from Portland to Ontario is $247, flying from May 30 to May 31.
The cheapest United flight from Portland to Ontario is $227, flying from May 30 to May 31.
The cheapest American flight from Portland to Ontario is $320, flying from May 30 to Jun 1.
The cheapest Frontier flight from Portland to Ontario is $140, flying from May 23 to May 24.

The cheapest round-trip flight from Portland to Ontario starts at $140 from Sat, May 23 to Sun, May 24. The cheapest one-way flight starts at $90 and departs on Tue, Jun 2.

2 hr 17 min is the shortest flight time from Portland to Ontario.

Ontario is a year-round destination, with mild to warm weather for much of the year. Summers (Jun–Aug) tend to be hot, while winters (Dec–Feb) are typically mild. There is a slightly higher chance of rain Jan–Apr. The Road to California (Jan) is a quilt show featuring quilting competitions, classes and exhibits. The city celebrates Independence Day (Jul 4) with a parade, picnic and fireworks display. The Route 66 Cruisin' Reunion (Sep) attracts vintage cars from around the country.

It's easy to use Google Flights to find the cheapest days to fly from Portland to Ontario.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.

What counts as the best airline for your flights from Portland to Ontario really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from Portland to Ontario.

In terms of nonstop flights, Alaska is the most popular. Alaska offers 20 nonstop flights and 258 connecting flights per week. Alaska flies from Portland International Airport (PDX) to Ontario International Airport (ONT) .

In terms of flights, Southwest is the most popular. Southwest offers 702 connecting flights per week. Southwest flies from Portland International Airport (PDX) to Ontario International Airport (ONT) .

Other popular airlines flying from Portland to Ontario are:

Delta offers 207 connecting flights per week. Delta flies from Portland International Airport (PDX) to Ontario International Airport (ONT) .
United offers 134 connecting flights per week. United flies from Portland International Airport (PDX) to Ontario International Airport (ONT) .
American offers 114 connecting flights per week. American flies from Portland International Airport (PDX) to Ontario International Airport (ONT) .
Frontier offers 15 connecting flights per week. Frontier flies from Portland International Airport (PDX) to Ontario International Airport (ONT) .

The number of connecting flights refers to distinct flights with at least one stop between Portland and Ontario.

The cheapest round-trip flight from Portland to Ontario recently found on Google Flights was with Frontier from $140. The cheapest one-way flight was with Frontier from $90.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest Alaska flight from Portland to Ontario is $207, flying from May 30 to Jun 1.
The cheapest Southwest flight from Portland to Ontario is $227, flying from May 30 to May 31.
The cheapest Delta flight from Portland to Ontario is $247, flying from May 30 to May 31.
The cheapest United flight from Portland to Ontario is $227, flying from May 30 to May 31.
The cheapest American flight from Portland to Ontario is $320, flying from May 30 to Jun 1.
The cheapest Frontier flight from Portland to Ontario is $140, flying from May 23 to May 24.

Alaska flies direct from Portland to Ontario.

There are 20 Alaska direct flights from Portland to Ontario per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

The cheapest last-minute deal between Portland and Ontario at price $315 is offered by Frontier from Thu, May 7 to Sun, May 10.

Alaska flies direct from Portland to Ontario.

There are 20 Alaska direct flights from Portland to Ontario per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

There are direct flights from Portland to Ontario on a daily basis.

The cheapest direct (nonstop) round-trip flights between Portland and Ontario start at $207 from Sat, May 30 to Mon, Jun 1 with Alaska.

It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Portland to Ontario, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.

The cheapest business class round-trip flights between Portland and Ontario start at $447 from Sat, Jun 6 to Sun, Jun 7 with Alaska.

The cheapest economy class round-trip flights between Portland and Ontario start at $140 from Sat, May 23 to Sun, May 24.

To book business class trips from Portland to Ontario, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.

The best last-minute getaway deal for the next weekend between Portland and Ontario starts at $315 from Thu, May 7 to Sun, May 10 with Frontier.

The cheapest last-minute deal between Portland and Ontario at price $315 is offered by Frontier from Thu, May 7 to Sun, May 10.

To find last-minute flight deals from Portland to Ontario, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.