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$401+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
jun. 23 — jun. 301
lun. 6/23
lun. 6/30
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 junio 18, 2025.

Round-trip from

$792
(Cheapflightsfares)

One-way from

$401
(Ovago)

Popular in

December

Cheapest in

May

Average price

$1,087
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 ($176 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 18, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/62:56 pmPDX - SYD
1 stop23h 09mQantas Airways
lun. 8/185:45 pmSYD - PDX
1 stop20h 30mQantas Airways
Deal found 6/17$792
This Priceline deal was found by Cheapflights users on 6/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/217:40 pmPDX - SYD
2 stops22h 00mAir Canada
sáb. 10/49:20 amSYD - PDX
1 stop26h 26mAir Canada
Deal found 6/16$796
This American Airlines deal was found by Cheapflights users on 6/16. 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.
dom. 9/211:59 pmPDX - SYD
2 stops24h 06mAmerican Airlines
sáb. 10/45:45 pmSYD - PDX
1 stop20h 34mAmerican Airlines
Deal found 6/16$839
This Delta deal was found by Cheapflights users on 6/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/610:15 amPDX - SYD
1 stop27h 20mDelta
sáb. 9/209:25 amSYD - PDX
1 stop19h 27mDelta
Deal found 6/17$851
This United Airlines deal was found by Cheapflights users on 6/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/319:47 amPDX - SYD
1 stop28h 08mUnited Airlines
dom. 9/710:20 amSYD - PDX
1 stop21h 22mUnited Airlines
Deal found 6/17$928
This Aunt Betty deal was found by Cheapflights users on 6/15. 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 Aunt Betty is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/315:40 pmPDX - SYD
1 stop20h 50mMultiple Airlines
jue. 8/79:10 amSYD - PDX
1 stop19h 21mMultiple Airlines
Deal found 6/15$936
This Priceline deal was found by Cheapflights users on 6/17. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/310:10 amPDX - SYD
2 stops29h 20mANA
mar. 12/912:25 pmSYD - PDX
2 stops24h 59mANA
Deal found 6/17$1,035
This Alaska Airlines deal was found by Cheapflights users on 6/18. 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.
dom. 11/92:55 pmPDX - SYD
1 stop21h 30mAlaska Airlines
sáb. 11/155:25 pmSYD - PDX
1 stop24h 06mAlaska Airlines
Deal found 6/18$1,096
This oojo deal was found by Cheapflights users on 6/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 7/141:37 pmPDX - SYD
1 stop24h 18mAir New Zealand
lun. 7/216:20 pmSYD - PDX
2 stops43h 17mAir New Zealand
Deal found 6/15$1,552

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 junio 18, 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

mié. 8/6

2:56 pm-7:05 am

1 stop23h 09m

Sydney Kingsford Smith

lun. 8/18

5:45 pm-9:15 pm

1 stop20h 30m

$792

PortlandSydney

PDX - SYD

PDXSYD

Portland

dom. 9/21

7:40 pm-10:40 am

2 stops22h 00m

Sydney Kingsford Smith

sáb. 10/4

9:20 am-6:46 pm

1 stop26h 26m

$796

PortlandSydney

PDX - SYD

PDXSYD

Portland

dom. 9/21

1:59 pm-7:05 am

2 stops24h 06m

Sydney Kingsford Smith

sáb. 10/4

5:45 pm-9:19 pm

1 stop20h 34m

$839

PortlandSydney

PDX - SYD

PDXSYD

Portland

sáb. 9/6

10:15 am-6:35 am

1 stop27h 20m

Sydney Kingsford Smith

sáb. 9/20

9:25 am-11:52 am

1 stop19h 27m

$851

PortlandSydney

PDX - SYD

PDXSYD

Portland

dom. 8/31

9:47 am-6:55 am

1 stop28h 08m

Sydney Kingsford Smith

dom. 9/7

10:20 am-2:42 pm

1 stop21h 22m

$928

PortlandSydney

PDX - SYD

PDXSYD

Portland

jue. 7/31

5:40 pm-7:30 am

1 stop20h 50m

Sydney Kingsford Smith

jue. 8/7

9:10 am-11:31 am

1 stop19h 21m

$936

PortlandSydney

PDX - SYD

PDXSYD

Portland

mié. 12/3

10:10 am-10:30 am

2 stops29h 20m

Sydney Kingsford Smith

mar. 12/9

12:25 pm-6:24 pm

2 stops24h 59m

$1,035

PortlandSydney

PDX - SYD

PDXSYD

Portland

dom. 11/9

2:55 pm-7:25 am

1 stop21h 30m

Sydney Kingsford Smith

sáb. 11/15

5:25 pm-10:31 pm

1 stop24h 06m

$1,096

PortlandSydney

PDX - SYD

PDXSYD

Portland

lun. 7/14

1:37 pm-6:55 am

1 stop24h 18m

Sydney Kingsford Smith

lun. 7/21

6:20 pm-8:37 pm

2 stops43h 17m

$1,552

PortlandSydney

PDX - SYD

PDXSYD

Portland

mar. 7/1

9:40 pm-7:45 pm

2 stops29h 05m

Sydney Kingsford Smith

vie. 1/9

9:40 pm-5:20 am

2 stops26h 40m

$1,647

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/15

Showing 1-10 of 18 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 13, 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, March 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 $1,635). 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 junio 18, 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 junio 18, 2025.
Peruse reviews from past customers who have flown with Air Tahiti Nui, ANA and Singapore Airlines from Portland to Sydney to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very good
64 reviews

Crew

9.0

Boarding

8.7

Food

7.8

Overall

8.7

Entertainment

7.3

Comfort

8.1

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

Crew

9.0

Boarding

8.7

Food

7.8

Overall

8.7

Entertainment

7.3

Comfort

8.1

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
886 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Crew

9.0

Boarding

8.7

Food

7.8

Overall

8.7

Entertainment

7.3

Comfort

8.1

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
1,310 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Crew

9.0

Boarding

8.7

Food

7.8

Overall

8.7

Entertainment

7.3

Comfort

8.1

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.
Fiji Airways
8.0
Very good
200 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Crew

9.0

Boarding

8.7

Food

7.8

Overall

8.7

Entertainment

7.3

Comfort

8.1

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
7,964 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Crew

9.0

Boarding

8.7

Food

7.8

Overall

8.7

Entertainment

7.3

Comfort

8.1

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?

    Qantas Airways, at $792, was found to be the cheapest airline from Portland to Sydney.Alternate airlines to your destination round-trip include Air Canada and American Airlines. Qantas Airways is 31% 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 Qantas Airways. According to our data, you can fly for as low as $401. Users have also found prices from $414 and $432 on Air Canada and United 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 Pacific Central Station, Orpheum Theatre, and Capilano Suspension Bridge. Pacific Central Station, Orpheum Theatre and Capilano Suspension Bridge are located about 6.6 mi, 6.5 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 $53.

  • 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, March 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 $1,635). 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.
Redmond to Sydney flights
Boise to Sydney flights
Medford to Sydney flights
Portland to Coolangatta flights
Eugene 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 junio 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$680Average$1,159FlexibilityNo cancel feeOn-time85%
Air CanadaCheapest$852Average$1,075FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$912Average$1,147FlexibilityNo cancel feeOn-time69%
DeltaCheapest$922Average$1,145FlexibilityNo cancel feeOn-timeN/A
Qantas AirwaysCheapest$1,036Average$1,137FlexibilityNo 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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