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$487+ Cheap flights from Portland (PDX) to Sydney (SYD)

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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Sep 2 — Sep 91
Tue 9/2
Tue 9/9
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Sydney Kingsford Smith are usually found in September or May, booked 88 days in advance, depart on a Saturday or Sunday and return on a Wednesday

Cheap flight deals from Portland to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Sydney (SYD). 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 August 28, 2025.

Round-trip from

$907
(Air Canada)

One-way from

$487
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$1,082
From Portland to Sydney Kingsford Smith
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One-way flight from Portland to Sydney Kingsford Smith
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Highest demand for flights based on searches. 9% potential increase in price ($118 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Portland to Sydney

Cheapest flights from Portland to Sydney
Explore the most affordable flight options available from Portland to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2025.

This Air Canada deal was found by Cheapflights users on 8/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/237:40 pmPDX - SYD
1 stop18h 40mAir Canada
Tue 9/309:20 amSYD - PDX
1 stop26h 26mAir Canada
Deal found 8/28$907
This Air Canada deal was found by Cheapflights users on 8/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/23:25 pmPDX - SYD
1 stop22h 55mAir Canada
Tue 9/239:20 amSYD - PDX
1 stop26h 26mAir Canada
Deal found 8/28$908
This Justfly.com deal was found by Cheapflights users on 8/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/73:25 pmPDX - SYD
1 stop22h 55mAir Canada
Wed 9/179:20 amSYD - PDX
1 stop17h 01mAir Canada
Deal found 8/28$916
This Air Canada deal was found by Cheapflights users on 8/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/93:25 pmPDX - SYD
2 stops26h 15mAir Canada
Tue 9/169:20 amSYD - PDX
1 stop17h 01mAir Canada
Deal found 8/27$927
This Gotogate deal was found by Cheapflights users on 8/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/313:25 pmPDX - SYD
1 stop22h 55mAir Canada
Sun 9/149:20 amSYD - PDX
1 stop17h 01mAir Canada
Deal found 8/26$939
This Alaska Airlines deal was found by Cheapflights users on 8/28. 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.
Wed 9/37:40 amPDX - SYD
1 stop19h 05mAlaska Airlines
Sun 9/149:40 pmSYD - PDX
1 stop25h 20mAlaska Airlines
Deal found 8/28$962

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Sydney 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 August 28, 2025.
Use the filters below to find and compare flights from Portland to Sydney that are best for you.

Fly from

Portland

Fly to

Sydney

Route

Depart

Return

Price

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 9/23

6:15 am-7:20 am

1 stop32h 05m

Sydney Kingsford Smith

Tue 9/30

9:20 am-9:21 am

1 stop17h 01m

$908

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 9/9

7:40 pm-7:20 am

1 stop18h 40m

Sydney Kingsford Smith

Tue 9/16

9:20 am-9:21 am

1 stop17h 01m

$908

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 9/10

7:40 pm-7:20 am

1 stop18h 40m

Sydney Kingsford Smith

Wed 9/17

9:20 am-6:46 pm

1 stop26h 26m

$908

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 9/9

7:40 pm-7:20 am

1 stop18h 40m

Sydney Kingsford Smith

Tue 9/23

9:20 am-2:46 pm

1 stop22h 26m

$908

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 9/7

7:40 pm-11:40 am

2 stops23h 00m

Sydney Kingsford Smith

Wed 9/17

9:20 am-11:01 pm

1 stop30h 41m

$935

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 9/7

6:15 am-11:40 am

2 stops36h 25m

Sydney Kingsford Smith

Tue 9/16

9:20 am-11:01 pm

1 stop30h 41m

$935

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 9/13

1:38 pm-7:20 am

3 stops48h 42m

$487

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 9/9

3:25 pm-7:20 am

1 stop22h 55m

$503

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 9/7

3:25 pm-7:20 am

1 stop22h 55m

$518

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 9/15

5:47 pm-2:40 pm

2 stops51h 53m

$525

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/27

Showing 1-10 of 13 results
1
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Best time to book a flight from Portland to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney 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 Sydney

How far ahead should I book a flight from Portland to Sydney?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Sydney. Price data was last updated on August 22, 2025.

Booking 88 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland to Sydney. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Portland to Sydney?

Currently, February is the cheapest month in which you can book a flight from Portland to Sydney (average of $1,030). Flying from Portland to Sydney in December is currently the most expensive (average of $1,615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Portland to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 28, 2025.

A simple way to save on the total cost of your ticket is to fly from Portland to Sydney in the morning. If you’re flexible enough to do this you can expect to save up to 7% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Portland to Sydney?

Use this chart to determine the cheapest time to fly round-trip from Portland to Sydney. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Portland to Sydney flight should consider departing on Saturday mornings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated August 28, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and United Airlines from Portland to Sydney to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
Delta
8.0
Very good
7,977 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
United Airlines
7.4
Good
8,944 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
Air Canada
7.1
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.

Related info for your journey

Find useful and relevant information for your journey from Portland to Sydney. 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 Sydney?

    For as low as $908, Air Canada can have you in Sydney from Portland in 32h 05m. There are 7674 mi between Portland and Sydney.

  • What are the cheapest airlines flying from Portland to Sydney round-trip?

    Air Canada, at $842, was found to be the cheapest airline from Portland to Sydney.Alternate airlines to your destination round-trip include Qantas Airways and United Airlines. Air Canada is 26% cheaper than the average price of flights available within the next 90 days to this destination.

  • Where are the most common layover locations when flying from Portland to Sydney?

    The most popular layover on flights from Portland to Sydney is San Francisco.

  • What are some popular things to do or see while on a layover in San Francisco?

    If you're on a layover in San Francisco and looking for things to do, consider visiting Fisherman's Wharf, Union Square, or Bill Graham Civic Auditorium. Fisherman's Wharf, Union Square, and Bill Graham Civic Auditorium can be accessed by traveling approximately 13.0 mi, 11.6 mi, and 11.1 mi, respectively from San Francisco. Travelers can rent a car at San Francisco for an average daily rate of $64 to make sightseeing during their layover a little easier.

  • Where are the least popular layover locations for Portland to Sydney flights?

    Portland to Sydney flights that have layovers will least frequently stop in Los Angeles.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Portland to Sydney?

    Currently, February is the cheapest month in which you can book a flight from Portland to Sydney (average of $1,030). Flying from Portland to Sydney in December is currently the most expensive (average of $1,615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Manly
Coogee

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Alternative routes for Portland to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
Medford to Sydney flights
Boise to Sydney flights
Eugene to Sydney flights
Redmond to Sydney flights
Portland to Coolangatta flights

Top 7 airlines flying from Portland to Sydney

Discover the top 7 airlines that operate flights from Portland to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$842Average$1,073FlexibilityNo cancel feeOn-time67%
Qantas AirwaysCheapest$898Average$1,345FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$912Average$1,085FlexibilityNo cancel feeOn-time69%
DeltaCheapest$922Average$1,092FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$946Average$1,228FlexibilityNo cancel feeOn-time85%
American AirlinesCheapest$954Average$1,052FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$1,099Average$1,249FlexibilityNo cancel feeOn-time75%

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