$513 Cheap Flights from Portland (PDX) to Adelaide (ADL)

View $513 flight on Mon, Sep 15, 2025Opens in a new window

Popular airlines from Portland International Airport (PDX) to Adelaide, SA Airport (ADL)

Cheap Flights from Portland to Adelaide (PDX-ADL)

Prices were available within the past 7 days and start at $513 for one-way flights and $1,039 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, Sep 15 - Mon, Sep 22
PDX
Portland
ADL
Adelaide
$1,039 Roundtrip, found 2 days ago
$1,039
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Sep 15 from Portland to Adelaide, returning Mon, Sep 22, priced at $1,039 found 2 days ago
Alaska Airlines
Mon, Sep 15 - Mon, Sep 22
PDX
Portland
ADL
Adelaide
$1,040 Roundtrip, found 2 days ago
$1,040
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Sep 15 from Portland to Adelaide, returning Mon, Sep 22, priced at $1,040 found 2 days ago
Qantas Airways
Mon, Sep 15 - Mon, Sep 22
PDX
Portland
ADL
Adelaide
$1,052 Roundtrip, found 2 days ago
$1,052
Roundtrip
found 2 days ago
Select Qantas Airways flight, departing Mon, Sep 15 from Portland to Adelaide, returning Mon, Sep 22, priced at $1,052 found 2 days ago
Qantas Airways
Mon, Sep 15 - Mon, Sep 22
PDX
Portland
ADL
Adelaide
$1,053 Roundtrip, found 2 days ago
$1,053
Roundtrip
found 2 days ago
Select Qantas Airways flight, departing Mon, Sep 15 from Portland to Adelaide, returning Mon, Sep 22, priced at $1,053 found 2 days ago
Alaska Airlines
Mon, Sep 15 - Mon, Sep 22
PDX
Portland
ADL
Adelaide
$1,065 Roundtrip, found 2 days ago
$1,065
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Sep 15 from Portland to Adelaide, returning Mon, Sep 22, priced at $1,065 found 2 days ago
Alaska Airlines
Mon, Sep 15 - Mon, Sep 22
PDX
Portland
ADL
Adelaide
$1,066 Roundtrip, found 2 days ago
$1,066
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Mon, Sep 15 from Portland to Adelaide, returning Mon, Sep 22, priced at $1,066 found 2 days ago
Qantas Airways
Mon, Sep 15 - Mon, Sep 22
PDX
Portland
ADL
Adelaide
$1,078 Roundtrip, found 2 days ago
$1,078
Roundtrip
found 2 days ago
Select Qantas Airways flight, departing Mon, Sep 15 from Portland to Adelaide, returning Mon, Sep 22, priced at $1,078 found 2 days ago
Air New Zealand
Tue, Feb 24 - Wed, Mar 11
PDX
Portland
ADL
Adelaide
$1,206 Roundtrip, found 5 days ago
$1,206
Roundtrip
found 5 days ago
Select Air New Zealand flight, departing Tue, Feb 24 from Portland to Adelaide, returning Wed, Mar 11, priced at $1,206 found 5 days ago
Hawaiian Airlines
Fri, Nov 28 - Thu, Dec 4
PDX
Portland
ADL
Adelaide
$1,207 Roundtrip, found 14 hours ago
$1,207
Roundtrip
found 14 hours ago
Select Hawaiian Airlines flight, departing Fri, Nov 28 from Portland to Adelaide, returning Thu, Dec 4, priced at $1,207 found 14 hours ago
United
Thu, Jan 1 - Sat, Jan 17
PDX
Portland
ADL
Adelaide
$1,336 Roundtrip, found 5 days ago
$1,336
Roundtrip
found 5 days ago
Select United flight, departing Thu, Jan 1 from Portland to Adelaide, returning Sat, Jan 17, priced at $1,336 found 5 days ago

Alternative airports near Adelaide

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

Select flight to Adelaide, SA Airport ADL. Cheapest and Closest option available. Average driving time to city center is 11 minutes. Flights from $1,222
ADL
Adelaide, SA Airport
CheapestClosest
Average driving time to city center11 min
Flights from $1,222
Flights from Portland (PDX) to Adelaide (ADL)
Origin airport
Portland Intl.
Destination airport
Adelaide
Airlines serving
Air Canada, Air New Zealand, Alaska Airlines, American Airlines, Hawaiian Airlines, Qantas Airways, Qatar Airways, United
Roundtrip price
$1,038
Distance
8280 mi

Portland to Adelaide Flights

The cheapest times to fly from Portland to Adelaide

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 Adelaide are during the month of September. You can find some of the cheapest flights from Portland to Adelaide with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to Adelaide

Sunday is one of the best days to book for cheap flights from Portland to Adelaide: 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 Adelaide

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 Adelaide in 2025. You can also book with separate airlines for your outbound and return journeys, from $513 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 Adelaide 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 Adelaide 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 Adelaide Airport (ADL) cost?
Discover the latest flight deals from PDX to ADL 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 ADL?
The cheapest flights from PDX to ADL 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 ADL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from PDX to ADL. 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 Adelaide Airport (ADL)?
There aren't any daily direct flights from Portland Intl. Airport (PDX) to Adelaide Airport (ADL). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from PDX to ADL?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*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 Adelaide Airport (ADL)?
To avoid possible delays on the Portland Intl. Airport (PDX) to Adelaide Airport (ADL) route, aim to travel before 3 PM. Departures after this hour are 22% more likely to be canceled.**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 Adelaide Airport (ADL) last-minute?
Last-minute fares from PDX to ADL are typically more expensive. To secure the best rates, start looking for flights well ahead of time. That said, if you're flexible with your travel plans, you may score a cheap ticket right before your journey.
Is it cheaper to book a PDX to ADL flight and hotel package?
You'll generally save money by booking a PDX to ADL flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. After choosing your ideal flights and accommodations, consider other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Adelaide Airport (ADL)?
Usually, it's possible to cancel or reschedule your PDX to ADL flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.