Cheap Flights from Portland to Ontario from £253️ (PWM-ONT)

Flights from Portland to Ontario

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Flights from Portland to Ontario Starting at £253

We've found these cheap flights for you. You can book one-way or return flight tickets.

One way
Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Find the best time to fly from Portland to Ontario

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Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Airlines Flying from Portland to Ontario

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines

From £96

Breeze Airways

From £107

United Airlines

From £143

Sun Country Airlines

From £194

Delta Air Lines

From £224

American Airlines

From £293

Southwest Airlines

From £478

Alaska Airlines

From £667

ANA airlines

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Alternative Routes from Portland to Ontario

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Portland to Ontario.

Cheapest
PWM
13:11
20h 3m
2 transfer
ONT
06:14
Portland International Jetport - Ontario International Airport
Thu, May 16Frontier Airlines
£96
PWM
13:11
20h 3m
2 transfer
ONT
06:14
Portland International Jetport - Ontario International Airport
Thu, May 16Frontier Airlines
£96
Find More Flights

How do I find the cheapest flights?

When are flight tickets from Portland (PWM) to Ontario (ONT) the cheapest?
Airlines adjust prices for flights from Portland to Ontario based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much are flights from Portland (PWM) to Ontario (ONT) cost?
According to Trip.com's data, the lowest price is around £503.

How to find a cheap flight from Portland to Ontario

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Portland to Ontario. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

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Look Out for Deals

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Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

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