$451 Cheap Flights from Portland (PDX) to Cairns (CNS)

View $451 flight on Sun, Aug 17, 2025Opens in a new window

Popular airlines from Portland International Airport (PDX) to Cairns Intl. Airport (CNS)

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Cheap Flights from Portland to Cairns (PDX-CNS)

Prices were available within the past 7 days and start at $451 for one-way flights and $1,066 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sun, Aug 17 - Wed, Aug 27
PDX
Portland
CNS
Cairns
$1,066 Roundtrip, found 6 days ago
$1,066
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sun, Aug 17 from Portland to Cairns, returning Wed, Aug 27, priced at $1,066 found 6 days ago
Qantas Airways
Sun, Aug 17 - Tue, Aug 26
PDX
Portland
CNS
Cairns
$1,066 Roundtrip, found 6 days ago
$1,066
Roundtrip
found 6 days ago
Select Qantas Airways flight, departing Sun, Aug 17 from Portland to Cairns, returning Tue, Aug 26, priced at $1,066 found 6 days ago
Alaska Airlines
Sun, Aug 17 - Wed, Aug 27
PDX
Portland
CNS
Cairns
$1,100 Roundtrip, found 6 days ago
$1,100
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sun, Aug 17 from Portland to Cairns, returning Wed, Aug 27, priced at $1,100 found 6 days ago
Qantas Airways
Sun, Aug 17 - Tue, Aug 26
PDX
Portland
CNS
Cairns
$1,100 Roundtrip, found 6 days ago
$1,100
Roundtrip
found 6 days ago
Select Qantas Airways flight, departing Sun, Aug 17 from Portland to Cairns, returning Tue, Aug 26, priced at $1,100 found 6 days ago
Alaska Airlines
Fri, Aug 1 - Fri, Aug 15
PDX
Portland
CNS
Cairns
$1,108 Roundtrip, found 6 days ago
$1,108
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Aug 1 from Portland to Cairns, returning Fri, Aug 15, priced at $1,108 found 6 days ago
Alaska Airlines
Fri, Aug 1 - Fri, Aug 15
PDX
Portland
CNS
Cairns
$1,116 Roundtrip, found 6 days ago
$1,116
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Aug 1 from Portland to Cairns, returning Fri, Aug 15, priced at $1,116 found 6 days ago
Alaska Airlines
Fri, Oct 17 - Sat, Nov 8
PDX
Portland
CNS
Cairns
$1,154 Roundtrip, found 2 days ago
$1,154
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Oct 17 from Portland to Cairns, returning Sat, Nov 8, priced at $1,154 found 2 days ago
Air Canada
Sun, Aug 17 - Wed, Aug 27
PDX
Portland
CNS
Cairns
$1,189 Roundtrip, found 6 days ago
$1,189
Roundtrip
found 6 days ago
Select Air Canada flight, departing Sun, Aug 17 from Portland to Cairns, returning Wed, Aug 27, priced at $1,189 found 6 days ago
American Airlines
Sun, Aug 17 - Tue, Aug 26
PDX
Portland
CNS
Cairns
$1,233 Roundtrip, found 6 days ago
$1,233
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sun, Aug 17 from Portland to Cairns, returning Tue, Aug 26, priced at $1,233 found 6 days ago
United
Sun, Aug 17 - Wed, Aug 27
PDX
Portland
CNS
Cairns
$1,508 Roundtrip, found 6 days ago
$1,508
Roundtrip
found 6 days ago
Select United flight, departing Sun, Aug 17 from Portland to Cairns, returning Wed, Aug 27, priced at $1,508 found 6 days ago

Alternative airports near Cairns

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Cairns Intl. CNS. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $2,233
CNS
Cairns Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $2,233
Flights from Portland (PDX) to Cairns (CNS)
Origin airport
Portland Intl.
Destination airport
Cairns Intl.
Airlines serving
Fiji Airways, Japan Airlines, Qantas Airways
Roundtrip price
$1,065
Distance
7123 mi

Portland to Cairns Flights

The cheapest times to fly from Portland to Cairns

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Portland to Cairns are during the month of August. You can find some of the cheapest flights from Portland to Cairns with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to Cairns

Sunday is one of the best days to book for cheap flights from Portland to Cairns: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Portland to Cairns

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Portland to Cairns in 2025. You can also book with separate airlines for your outbound and return journeys, from $451 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Portland to Cairns flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Portland to Cairns airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Cairns Intl. Airport (CNS) cost?
Discover the latest flight deals from PDX to CNS by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from PDX to CNS?
The cheapest flights from PDX to CNS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from PDX to CNS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from PDX to CNS. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Portland Intl. Airport (PDX) to Cairns Intl. Airport (CNS)?
Direct flights from Portland Intl. Airport (PDX) to Cairns Intl. Airport (CNS) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from PDX to CNS?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Portland Intl. Airport (PDX) to Cairns Intl. Airport (CNS)?
To touch down at Cairns Intl. Airport (CNS) on schedule, book a flight that leaves from Portland Intl. Airport (PDX) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Portland Intl. Airport (PDX) to Cairns Intl. Airport (CNS) last-minute?
Holding off until just before your departure to book a flight from PDX to CNS often results in higher prices. Although you may find some last-minute deals, they're not always guaranteed. Keep your travel schedule open for the best chance of getting a bargain.
Is it cheaper to book a PDX to CNS flight and hotel package?
Compared with arranging flights and hotels separately, booking a PDX to CNS flight and hotel package with Expedia could result in significant savings. What's more, having it all in one place will take the stress out of travel planning. Just pick your flights and select from our extensive range of hotels, then personalize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Cairns Intl. Airport (CNS)?
If you reserved your PDX to CNS flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

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*Available to One Key members.