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$366+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Sydney Kingsford Smith are usually found in May or February, 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 July 3, 2025.

Round-trip from

$704
(SmartFares)

One-way from

$366
(Alaska Airlines)

Popular in

December

Cheapest in

May

Average price

$1,160
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. 13% potential increase in price ($184 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This SmartFares deal was found by Cheapflights users on 7/1. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/210:30 amPDX - SYD
1 stop27h 35mAlaska Airlines
Fri 8/159:10 amSYD - PDX
1 stop19h 21mAlaska Airlines
Deal found 7/1$704
This Cheapflightsfares deal was found by Cheapflights users on 7/2. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/62:56 pmPDX - SYD
1 stop23h 09mQantas Airways
Wed 9/175:45 pmSYD - PDX
1 stop19h 45mQantas Airways
Deal found 7/2$774
This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/57:40 pmPDX - SYD
1 stop18h 40mAir Canada
Thu 9/189:20 amSYD - PDX
1 stop17h 01mAir Canada
Deal found 7/2$798
This United Airlines deal was found by Cheapflights users on 7/2. 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 8/51:37 pmPDX - SYD
1 stop24h 18mUnited Airlines
Wed 8/2710:20 amSYD - PDX
1 stop21h 22mUnited Airlines
Deal found 7/2$824
This Delta deal was found by Cheapflights users on 7/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/812:35 pmPDX - SYD
1 stop25h 00mDelta
Thu 8/289:25 amSYD - PDX
1 stop19h 14mDelta
Deal found 7/2$832

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 July 3, 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 8/2

10:30 am-7:05 am

1 stop27h 35m

Sydney Kingsford Smith

Fri 8/15

9:10 am-11:31 am

1 stop19h 21m

$704

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 9/6

2:56 pm-7:05 am

1 stop23h 09m

Sydney Kingsford Smith

Wed 9/17

5:45 pm-8:30 pm

1 stop19h 45m

$774

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 9/5

7:40 pm-7:20 am

1 stop18h 40m

Sydney Kingsford Smith

Thu 9/18

9:20 am-9:21 am

1 stop17h 01m

$798

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 8/5

12:55 pm-7:00 am

2 stops25h 05m

Sydney Kingsford Smith

Tue 8/26

9:30 am-3:06 pm

2 stops22h 36m

$824

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 8/8

12:35 pm-6:35 am

1 stop25h 00m

Sydney Kingsford Smith

Thu 8/28

9:25 am-11:39 am

1 stop19h 14m

$832

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 8/12

3:40 pm-7:05 am

2 stops22h 25m

$366

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 9/9

2:35 pm-2:40 pm

2 stops31h 05m

$386

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 8/5

3:00 pm-7:05 am

1 stop23h 05m

$392

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 8/5

3:15 pm-6:05 am

2 stops21h 50m

$401

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 8/11

12:55 pm-7:00 am

2 stops25h 05m

$409

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 14 results
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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 June 27, 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 $1,040). Flying from Portland to Sydney in December is currently the most expensive (average of $1,630). 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 July 3, 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 July 3, 2025.
Peruse reviews from past customers who have flown with Air Tahiti Nui, Alaska Airlines, and Delta 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.
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Crew

9.0

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

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
8.7
Very good
64 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Crew

9.0

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

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.
Alaska Airlines
8.0
Very good
10,000 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Crew

9.0

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

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
7,982 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Crew

9.0

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

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.
Qantas Airways
7.5
Good
868 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Crew

9.0

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

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.
United Airlines
7.4
Good
8,861 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Crew

9.0

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

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 $704, was found to be the cheapest airline from Portland to Sydney.Alternate airlines to your destination round-trip include Qantas Airways and Air Canada. Alaska Airlines is 39% 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 Alaska Airlines. According to our data, you can fly for as low as $366. Users have also found prices from $392 and $401 on Qantas Airways and American 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 $56 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 Orpheum Theatre, Pacific Central Station, and Capilano Suspension Bridge. Orpheum Theatre, Pacific Central Station and Capilano Suspension Bridge are located about 6.5 mi, 6.6 mi, and 10.6 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 $63.

  • 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 $1,040). Flying from Portland to Sydney in December is currently the most expensive (average of $1,630). 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
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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$680Average$1,159FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$849Average$1,069FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$912Average$1,146FlexibilityNo cancel feeOn-time69%
DeltaCheapest$922Average$1,133FlexibilityNo cancel feeOn-timeN/A
Qantas AirwaysCheapest$929Average$1,136FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$1,055Average$1,179FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$1,068Average$1,223FlexibilityNo cancel feeOn-time75%

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