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$619+ 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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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Cheapflights Tip: The best prices from Portland to Sydney Kingsford Smith are usually found in February or August, booked 25 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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,134
(Kiwi.com)

One-way from

$691
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$1,191
Provider with most accurate pricing for Portland-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Sydney Kingsford Smith flights.
Search Deals
From Portland to Sydney Kingsford Smith
Search Deals
One-way flight from Portland to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($180 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 17, 2025.

This Air Canada deal was found by Cheapflights users on 4/17. 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.
Thu 10/237:40 pmPDX - SYD
1 stop18h 40mAir Canada
Mon 11/1711:20 amSYD - PDX
1 stop26h 04mAir Canada
Deal found 4/17$1,068
This Air Canada deal was found by Cheapflights users on 4/16. 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.
Sat 9/277:40 pmPDX - SYD
2 stops23h 00mMultiple Airlines
Sat 10/189:35 pmSYD - PDX
2 stops35h 11mMultiple Airlines
Deal found 4/16$1,131
This Alaska Airlines deal was found by Cheapflights users on 4/16. 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 9/175:47 pmPDX - SYD
2 stops32h 58mAlaska Airlines
Fri 10/39:40 pmSYD - PDX
1 stop25h 20mAlaska Airlines
Deal found 4/16$1,157
This Gurufare deal was found by Cheapflights users on 4/15. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/177:47 amPDX - SYD
2 stops33h 48mAir New Zealand
Sat 8/306:20 pmSYD - PDX
2 stops41h 16mAir New Zealand
Deal found 4/15$1,189
This Hawaiian Airlines deal was found by Cheapflights users on 4/16. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/297:35 amPDX - SYD
1 stop19h 10mHawaiian Airlines
Fri 9/129:40 pmSYD - PDX
1 stop18h 00mHawaiian Airlines
Deal found 4/16$1,226
This American Airlines deal was found by Cheapflights users on 4/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/43:00 pmPDX - SYD
1 stop23h 05mAmerican Airlines
Mon 8/119:10 amSYD - PDX
1 stop20h 39mAmerican Airlines
Deal found 4/16$1,241
This United Airlines deal was found by Cheapflights users on 4/16. 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.
Wed 9/171:45 pmPDX - SYD
1 stop24h 10mUnited Airlines
Wed 10/110:20 amSYD - PDX
1 stop27h 21mUnited Airlines
Deal found 4/16$1,257
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/175:20 pmPDX - SYD
2 stops20h 15mDelta
Mon 10/610:25 amSYD - PDX
2 stops24h 41mDelta
Deal found 4/16$1,270
This Justfly.com deal was found by Cheapflights users on 4/16. 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.
Fri 9/1910:00 amPDX - SYD
2 stops30h 25mANA
Sun 10/512:50 pmSYD - PDX
2 stops23h 56mANA
Deal found 4/16$1,289
This Gurufare deal was found by Cheapflights users on 4/16. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/13:00 pmPDX - SYD
1 stop23h 05mQantas Airways
Sat 7/125:45 pmSYD - PDX
1 stop21h 29mQantas Airways
Deal found 4/16$1,314
This Qatar Airways deal was found by Cheapflights users on 4/16. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/199:30 pmPDX - SYD
2 stops50h 40mQatar Airways
Wed 10/18:45 pmSYD - PDX
2 stops41h 05mQatar Airways
Deal found 4/16$1,878
This FlightHub deal was found by Cheapflights users on 4/16. 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 11/95:30 pmPDX - SYD
3 stops29h 10mAir Tahiti Nui
Sun 11/238:55 amSYD - PDX
3 stops26h 33mAir Tahiti Nui
Deal found 4/16$1,983

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 April 17, 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

Sat 9/27

7:40 pm-7:20 am

1 stop18h 40m

Sydney Kingsford Smith

Sat 10/18

10:20 am-9:21 am

1 stop17h 01m

$1,068

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 9/27

7:40 pm-11:40 am

2 stops23h 00m

Sydney Kingsford Smith

Sat 10/18

9:35 pm-2:46 pm

2 stops35h 11m

$1,131

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 9/17

7:35 am-7:45 pm

1 stop19h 10m

Sydney Kingsford Smith

Sat 10/4

9:40 pm-6:20 am

2 stops25h 40m

$1,157

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sun 8/17

7:47 am-10:35 am

2 stops33h 48m

Sydney Kingsford Smith

Sat 8/30

6:20 pm-6:36 pm

2 stops41h 16m

$1,189

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 8/29

7:35 am-7:45 pm

1 stop19h 10m

Sydney Kingsford Smith

Fri 9/12

9:40 pm-10:40 pm

1 stop18h 00m

$1,226

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 8/4

3:00 pm-7:05 am

1 stop23h 05m

Sydney Kingsford Smith

Mon 8/11

9:10 am-12:49 pm

1 stop20h 39m

$1,241

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 9/17

5:40 pm-6:55 am

1 stop20h 15m

Sydney Kingsford Smith

Tue 10/7

11:20 am-8:41 pm

1 stop27h 21m

$1,257

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 9/17

5:20 pm-6:35 am

2 stops20h 15m

Sydney Kingsford Smith

Sun 10/5

10:25 am-5:06 pm

2 stops24h 41m

$1,270

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 9/19

10:00 am-9:25 am

2 stops30h 25m

Sydney Kingsford Smith

Sun 10/5

12:50 pm-6:46 pm

2 stops23h 56m

$1,289

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 7/1

3:00 pm-7:05 am

1 stop23h 05m

Sydney Kingsford Smith

Sat 7/12

5:45 pm-10:14 pm

1 stop21h 29m

$1,314

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 28 results
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Compare providers for flights from Portland to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Sydney in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-Sydney flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Portland-Sydney flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Portland-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Sydney flights, Cheapflights users trust AranGrant the most. AranGrant 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-Sydney 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 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 April 11, 2025.

Booking 24 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 $1,046). Flying from Portland to Sydney in December is currently the most expensive (average of $1,643). 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 April 17, 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.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Sydney when rainfall is around 2.0 in.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

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 April 17, 2025.
Air Tahiti Nui
8.8
Very good
62 reviews

Comfort

8.1

Boarding

8.7

Crew

9.1

Food

7.8

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.8
Very good
62 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Comfort

8.1

Boarding

8.7

Crew

9.1

Food

7.8

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
ANA
8.3
Very good
844 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Comfort

8.1

Boarding

8.7

Crew

9.1

Food

7.8

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Singapore Airlines
8.1
Very good
1,288 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Comfort

8.1

Boarding

8.7

Crew

9.1

Food

7.8

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Delta
8.0
Very good
7,916 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Comfort

8.1

Boarding

8.7

Crew

9.1

Food

7.8

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air New Zealand
8.0
Very good
467 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Comfort

8.1

Boarding

8.7

Crew

9.1

Food

7.8

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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.

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

    Alaska Airlines, at $1,157, was found to be the cheapest airline from Portland to Sydney.Alternate airlines to your destination round-trip include Hawaiian Airlines and United Airlines. Alaska Airlines is 1% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Portland to Sydney one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $697. Users have also found prices from $705 and $718 on United Airlines and Alaska Airlines, respectively.

  • 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. Portland to Sydney flights stop in Vancouver the next most.

  • 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 $61 to make sightseeing during their layover a little easier.

  • What are some popular points of interest to see during a layover in Vancouver?

    Most Vancouver visitors opt to spend their time at Pacific Central Station, Queen Elizabeth Theatre, and Vancouver Harbour Centre. Pacific Central Station, Queen Elizabeth Theatre and Vancouver Harbour Centre are located about 6.6 mi, 6.6 mi, and 6.9 mi, respectively from Vancouver Intl if you are interested in checking them out. Those on a layover in Vancouver in need of a rental car can book one at Vancouver Intl for about $38.

  • 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 $1,046). Flying from Portland to Sydney in December is currently the most expensive (average of $1,643). 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 Portland?

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

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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.
Redmond to Sydney flights
Boise to Sydney flights
Portland to Coolangatta flights
Eugene to Sydney flights
Medford to Sydney 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$444Average$1,277FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$759Average$1,127FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$845Average$1,065FlexibilityNo cancel feeOn-time67%
DeltaCheapest$922Average$1,156FlexibilityNo cancel feeOn-timeN/A
Qantas AirwaysCheapest$1,036Average$1,138FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$1,055Average$1,142FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$1,068Average$1,254FlexibilityNo cancel feeOn-time75%

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