£104 Cheap Flights from Portland (PDX) to Ontario Intl. Airport (ONT)

You can find one-way and return flights from PDX to ONT with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when PDX to ONT ticket fares go up or down.

August is typically the cheapest month to fly from Portland, OR (PDX-Portland Intl.) to Ontario Intl. Airport (ONT), with average return fares around £174. August often sees lower prices as the peak summer travel season begins to wind down. Other cheap months to fly from Portland, OR (PDX-Portland Intl.) to Ontario Intl. Airport (ONT) include January and February.

Enter PDX to ONT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.

Southwest Airlines also offers one of the cheapest connecting return flights with a layover in Sky Harbor Intl. (PHX), starting from around £91. Airport (ONT), with tickets starting from around £223 for flights that can be booked for departure within the next year. Southwest Airlines is one of the cheapest airlines offering nonstop return flights from Portland Intl. (PDX) to Ontario Intl. These prices are per adult, for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.

To find a cheap flight from Portland, OR (PDX) to Ontario Intl. Airport (ONT), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.

The earliest flight from Portland International Airport (PDX) to Ontario International Airport (ONT) typically departs around 12:40 AM. This service is operated by American Airlines and is seasonal, active in May and June. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

A non-stop flight from Portland, OR (PDX-Portland Intl.) to Ontario Intl. Airport (ONT) typically takes around 2 hours 18 minutes. This route covers a distance of approximately 1,350 kilometers. If you opt for a one-stop flight, your journey will generally be longer, taking about 6 hours 48 minutes. Flights with two or more stops usually take around 10 hours. Keep in mind that actual flight times can vary due to factors like routing, weather, and wind patterns.

Select the "Business class" and "First class" filters when looking for Portland, OR (PDX) to Ontario Intl. Airport (ONT) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.

It's easy to earn miles on a Portland, OR (PDX-Portland Intl.) to Ontario Intl. Airport (ONT) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

If you're planning to travel to Ontario from Portland Intl. (PDX), you can fly directly into Los Angeles - Ontario Intl. (ONT). Some flights may connect through major hubs like Denver Intl. (DEN), Sky Harbor Intl. (PHX), or Oakland Intl. (OAK) before reaching Ontario. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from Portland, OR (PDX-Portland Intl.) to Ontario Intl. Airport (ONT) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Securing a Portland, OR (PDX-Portland Intl.) to Ontario Intl. Airport (ONT) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

If you booked your Portland, OR (PDX) to Ontario Intl. Airport (ONT) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.