Discover affordable flights from Portland to Ontario with prices starting from $258. Book your journey today!
Portland
PDX
→
Ontario
ONT
11/24/2025 – 12/01/2025
Cheap flight deals from Portland to Ontario
Average price start from:
i
$126
Round-trip flights from Portland to Ontario starting at $126. Book now for the best deals!
One-way from:
i
$64
One-way flights from Portland to Ontario starting at $64. Great for flexible travel!
Cheapest day:
i
Wednesday
Wednesday is the cheapest day to fly from Portland to Ontario. Save more by booking on this day!
Cheapest In:
i
$38
Aug 2025
Aug 2025 is the cheapest month to fly from Portland to Ontario with prices starting at $38.
Find flight deals from Portland to Ontario
Cheapest flights from Portland to Ontario
ONEWAY FLIGHTS
LAST MINUTE
CHEAP FLIGHTS
BEST FLIGHTS
Explore the cheapest oneway flights from Portland to Ontario spotted daily.
PDX
Portland
PDX - Portland • 2025-11-24 • 09:00
Unknown
60 min
ONT
Unknown City
$64
Non-stop • 60 min
PDX
Portland
PDX - Portland • 2025-11-24 • 09:00
Unknown
60 min
ONT
Unknown City
$89
Non-stop • 60 min
PDX
Portland
PDX - Portland • 2025-11-24 • 09:00
Unknown
60 min
ONT
Unknown City
$98
Non-stop • 60 min
PDX
Portland
PDX - Portland • 2025-11-24 • 09:00
Unknown
60 min
ONT
Unknown City
$104
Non-stop • 60 min
PDX
Portland
PDX - Portland • 2025-11-24 • 09:00
Unknown
60 min
ONT
Unknown City
$109
Non-stop • 60 min
PDX
Portland
PDX - Portland • 2025-11-24 • 09:00
Unknown
60 min
ONT
Unknown City
$134
Non-stop • 60 min
PDX
Portland
PDX - Portland • 2025-11-24 • 09:00
Unknown
60 min
ONT
Unknown City
$289
Non-stop • 60 min
Price Trends & Analysis
Weekly Price Trends
For the best deals, try flying to Ontario on Wednesday.
Monthly Price Trends
Best time to book flights from Portland to Ontario is during September.
Weather & Climate Information
Temperature
Ontario experiences a Mediterranean climate with hot, dry summers and mild, wetter winters. In August, average highs are around 34°C (93°F) and lows near 19°C (66°F). Rain is rare in summer, and the region enjoys abundant sunshine year-round.
Rainfall
The best time to visit Ontario is from March to May and September to November, when temperatures are pleasant and crowds are smaller. Spring and fall offer ideal weather for outdoor activities and sightseeing.
Airlines at ONT
Book your journey from Portland to Ontario with leading airlines including Frontier Airlines, Alaska Airlines, Southwest Airlines, Delta Air Lines. These carriers provide excellent connectivity and multiple daily options for convenient travel.
The typical flight time is about 10-15 hours, with most flights featuring one stopover for better pricing and route optimization. When traveling from Portland to Ontario, these airlines ensure a smooth and comfortable experience with their modern fleet and professional service.
Places to Visit in Ontario
Top places to visit in Ontario include the **Ontario Mills**, One of California’s largest outlet malls, featuring over 200 stores, a 30-screen megaplex, and family entertainment options.; the **Museum of History and Art, Ontario**, A museum housed in the former city hall, offering exhibits on local history, art, and cultural traditions.; the **Graber Olive House**, Historic olive cannery and shop, operating since 1894, offering tours and gourmet products.; the **Cucamonga-Guasti Regional Park**, A 150-acre park with lakes, water slides, paddle boats, and picnic areas, ideal for family recreation.; and the **Toyota Arena**, A modern arena hosting concerts, sports events, and family shows..
About Ontario
Embark on an incredible journey from Portland to Ontario and immerse yourself in the charm of this remarkable destination. Ontario is a vibrant city in Southern California's Inland Empire, known for its mix of historic sites, major shopping destinations, family-friendly parks, and proximity to Los Angeles and Palm Springs. It serves as a gateway to the region and offers a variety of attractions, from wineries and olive houses to amusement parks and sports arenas.[1][3][4]
Founded in 1881 by the Chaffey brothers from Ontario, Canada, the city was named after their hometown. Ontario has a rich agricultural heritage, highlighted by landmarks like the Graber Olive House (est. 1894) and San Antonio Winery. The city’s Museum of History and Art, housed in a 1937 Mediterranean-style building, showcases local history and culture.[1][3]
For optimal weather conditions, visit Ontario during Peak season is during the summer months (June to August) and around major holidays, when families travel and local attractions are busiest. when outdoor activities are at their best.
Save significantly on your trip by booking flights from Portland to Ontario in September and selecting Wednesday flights. Experience the local way of life and taste the authentic flavors of Ontario.
Airlines Flying from Portland to Ontario
Book your journey from Portland to Ontario with leading airlines including Frontier Airlines, Alaska Airlines, Southwest Airlines, Delta Air Lines. These carriers provide excellent connectivity and multiple daily options for convenient travel.
The typical flight time is about 10-15 hours, with most flights featuring one stopover for better pricing and route optimization. When traveling from Portland to Ontario, these airlines ensure a smooth and comfortable experience with their modern fleet and professional service.
Hotels in Ontario
When staying in Ontario, look for hotels with easy access to ONT Airport. Most properties provide shuttle services for seamless airport transfers.
Airport Statistics
As a major transportation hub, the airport offers extensive connectivity through an array of domestic and international flights, facilitating seamless passenger movement via advanced air traffic management systems. Equipped with state-of-the-art facilities, including efficient check-in counters, premium lounges, and a diverse range of dining and shopping options, the airport ensures a comfortable and streamlined travel experience for all passengers.
About Ontario
Embark on an incredible journey from Portland to Ontario and immerse yourself in the charm of this remarkable destination. Ontario is a vibrant city in Southern California's Inland Empire, known for its mix of historic sites, major shopping destinations, family-friendly parks, and proximity to Los Angeles and Palm Springs. It serves as a gateway to the region and offers a variety of attractions, from wineries and olive houses to amusement parks and sports arenas.[1][3][4]
Founded in 1881 by the Chaffey brothers from Ontario, Canada, the city was named after their hometown. Ontario has a rich agricultural heritage, highlighted by landmarks like the Graber Olive House (est. 1894) and San Antonio Winery. The city’s Museum of History and Art, housed in a 1937 Mediterranean-style building, showcases local history and culture.[1][3]
For optimal weather conditions, visit Ontario during Peak season is during the summer months (June to August) and around major holidays, when families travel and local attractions are busiest. when outdoor activities are at their best.
Save significantly on your trip by booking flights from Portland to Ontario in September and selecting Wednesday flights. Experience the local way of life and taste the authentic flavors of Ontario.
Places to Visit in Ontario
Top places to visit in Ontario include the **Ontario Mills**, One of California’s largest outlet malls, featuring over 200 stores, a 30-screen megaplex, and family entertainment options.; the **Museum of History and Art, Ontario**, A museum housed in the former city hall, offering exhibits on local history, art, and cultural traditions.; the **Graber Olive House**, Historic olive cannery and shop, operating since 1894, offering tours and gourmet products.; the **Cucamonga-Guasti Regional Park**, A 150-acre park with lakes, water slides, paddle boats, and picnic areas, ideal for family recreation.; and the **Toyota Arena**, A modern arena hosting concerts, sports events, and family shows..
Hotels in Ontario
When staying in Ontario, look for hotels with easy access to ONT Airport. Most properties provide shuttle services for seamless airport transfers.
Airlines Flying from Portland to Ontario
Book your journey from Portland to Ontario with leading airlines including Frontier Airlines, Alaska Airlines, Southwest Airlines, Delta Air Lines. These carriers provide excellent connectivity and multiple daily options for convenient travel.
The typical flight time is about 10-15 hours, with most flights featuring one stopover for better pricing and route optimization. When traveling from Portland to Ontario, these airlines ensure a smooth and comfortable experience with their modern fleet and professional service.
Frequently Asked Questions
What's the lowest price for flights from Portland to Ontario?
You can find flights starting from $64. For better deals, book during September and choose Wednesday departures.
How long is the journey from Portland to Ontario?
The average flight time is about 10-15 hours, with most routes including one stopover for better pricing and comfort.
What airlines operate flights on this route?
Several airlines serve this route including Frontier Airlines, Alaska Airlines, Southwest Airlines. Research current schedules and compare prices for the best deal.
How far in advance should I book?
For the best prices, book 2-3 months ahead and consider traveling during September when prices are typically lower.
What accommodation options are near ONT Airport?
ONT Airport has several nearby hotels with shuttle services, making it convenient for travelers with early or late flights.
What attractions can I visit in Ontario?
Ontario features a wonderful combination of historical sites and modern attractions. The best time to visit is during Peak season is during the summer months (June to August) and around major holidays, when families travel and local attractions are busiest. for optimal sightseeing.
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