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$636+ Cheap flights from Portland (PDX) to Adelaide (ADL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/29. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — ADL
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap flight deals from Portland to Adelaide

Cheapest flights from Portland to Adelaide
Explore the most affordable flight options available from Portland to Adelaide. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This Qantas Airways deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:41 pmPDX - ADL
2 stops29h 34mQantas Airways
Mon 12/87:50 amADL - PDX
2 stops28h 08mQantas Airways
Deal found 12/1$1,209
This Alaska Airlines deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:00 amPDX - ADL
2 stops40h 45mAlaska Airlines
Mon 12/88:00 pmADL - PDX
2 stops51h 55mAlaska Airlines
Deal found 12/3$1,210
This Qantas Airways deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/285:41 pmPDX - ADL
2 stops24h 49mMultiple Airlines
Tue 1/137:50 amADL - PDX
2 stops24h 21mMultiple Airlines
Deal found 12/2$1,265
This FlightHub deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/284:26 pmPDX - ADL
2 stops26h 44mQantas Airways
Tue 1/137:50 amADL - PDX
2 stops24h 21mQantas Airways
Deal found 12/3$1,302
This United Airlines deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2811:55 pmPDX - ADL
2 stops39h 05mUnited Airlines
Tue 1/136:00 amADL - PDX
3 stops31h 26mUnited Airlines
Deal found 12/4$1,702
This Mytrip deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/309:50 amPDX - ADL
3 stops31h 10mMultiple Airlines
Tue 1/64:25 pmADL - PDX
3 stops44h 35mMultiple Airlines
Deal found 12/2$2,032
This oojo deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:26 pmPDX - ADL
2 stops26h 44mQantas Airways
Tue 1/62:25 pmADL - PDX
2 stops41h 46mQantas Airways
Deal found 12/2$2,149
This United Airlines deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/303:54 pmPDX - ADL
2 stops27h 46mUnited Airlines
Tue 1/69:30 amADL - PDX
3 stops51h 56mUnited Airlines
Deal found 12/2$2,451

Find flight deals from Portland to Adelaide

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Adelaide (ADL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 4, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$945
(Air Canada)

One-way from

$636
(BYOjet)
Provider with most accurate pricing for Portland-Adelaide flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Adelaide flights.
Search Deals
From Portland to Adelaide
Search Deals
One-way flight from Portland to Adelaide
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Adelaide that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 4, 2025.
Use the filters below to find and compare flights from Portland to Adelaide that are best for you.

Fly from

Portland

Fly to

Adelaide

Route

Depart

Return

Price

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Tue 1/27

7:00 pm-4:20 pm

2 stops26h 50m

Adelaide

Tue 2/10

6:10 am-2:40 pm

2 stops27h 00m

$945

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 1/19

8:30 am-9:30 am

2 stops30h 30m

Adelaide

Mon 1/26

2:55 pm-2:46 pm

1 stop18h 21m

$1,103

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 1/18

7:00 pm-10:30 pm

2 stops33h 00m

Adelaide

Sun 1/25

6:10 am-9:15 am

2 stops21h 35m

$1,116

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 1/18

7:00 pm-4:20 pm

2 stops26h 50m

Adelaide

Sun 1/25

6:00 am-6:30 pm

3 stops31h 00m

$1,188

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 12/28

5:41 pm-1:00 pm

2 stops24h 49m

Adelaide

Tue 1/13

7:50 am-1:41 pm

2 stops24h 21m

$1,265

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 12/28

4:26 pm-1:40 pm

2 stops26h 44m

Adelaide

Tue 1/13

7:50 am-1:41 pm

2 stops24h 21m

$1,302

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 1/11

1:24 pm-9:30 am

2 stops49h 36m

Adelaide

Sat 1/31

2:55 pm-11:06 pm

1 stop26h 41m

$1,474

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Mon 12/29

4:26 pm-1:40 pm

2 stops26h 44m

$636

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sun 12/28

4:26 pm-5:45 pm

2 stops30h 49m

$770

PortlandAdelaide

PDX - ADL

PDXADL

Portland

Sat 12/27

5:00 am-9:30 am

2 stops34h 00m

$807

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 15 results
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  • Most accurate provider: When it comes to deals on Portland-Adelaide flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Adelaide flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Adelaide flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Adelaide flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Adelaide flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Adelaide

Have a flexible travel schedule? Discover the best time to fly to Adelaide from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Adelaide

What is the cheapest time of day to fly from PDX to ADL?

Find hourly flight availability from Portland to Adelaide. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

One of the essential ways to save on airfare from Portland to Adelaide is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 19% on airfare.

Related info for your journey

Find useful and relevant information for your journey from Portland to Adelaide. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portland to Adelaide?

    A quick flight from Portland to Adelaide can take about 26h 50m. Air Canada provides one of the quickest options available for as low as $945. The distance from Portland to Adelaide is about 8275 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Portland to Adelaide that include hotel bookings?

    Yes. In addition to deals on Portland to Adelaide flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Adelaide?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Adelaide.

  • Can I find deals for business class flights from Portland to Adelaide?

    Yes. Cheapflights offers flight deals from Portland to Adelaide by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Adelaide?

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