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Cheap flights from Portland to Sydney from $606

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 23/3. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
10 Apr — 17 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portland to Sydney

Enter your travel dates to find the best prices.

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 11 March 2026.

Mon 22/615:30
PDX
-
SYD
1 stop22h 50m
Air Canada
Tue 21/709:20
SYD
-
PDX
1 stop17h 11m
Air Canada
Deal found 9/3$1,325
Tue 21/409:50
PDX
-
SYD
1 stop28h 30m
Air Canada
Tue 28/409:20
SYD
-
PDX
1 stop26h 10m
Air Canada
Deal found 6/3$1,327
Mon 6/715:30
PDX
-
SYD
1 stop22h 50m
Air Canada
Sun 26/709:20
SYD
-
PDX
1 stop17h 11m
Air Canada
Deal found 7/3$1,331
Wed 10/619:45
PDX
-
SYD
1 stop18h 35m
Air Canada
Tue 16/609:20
SYD
-
PDX
1 stop26h 45m
Air Canada
Deal found 10/3$1,335
Sat 12/919:45
PDX
-
SYD
1 stop18h 35m
Air Canada
Sun 27/909:20
SYD
-
PDX
1 stop17h 11m
Air Canada
Deal found 10/3$1,337
Tue 5/519:45
PDX
-
SYD
1 stop18h 35m
Air Canada
Tue 12/509:20
SYD
-
PDX
1 stop22h 25m
Air Canada
Deal found 10/3$1,338
Sun 19/419:05
PDX
-
SYD
1 stop19h 15m
Air Canada
Fri 1/509:20
SYD
-
PDX
1 stop17h 10m
Air Canada
Deal found 8/3$1,341
Sat 21/1119:10
PDX
-
SYD
1 stop19h 25m
Air Canada
Sun 29/1111:20
SYD
-
PDX
1 stop17h 05m
Air Canada
Deal found 9/3$1,342
Thu 1/1015:30
PDX
-
SYD
1 stop22h 50m
Air Canada
Thu 8/1010:20
SYD
-
PDX
1 stop22h 31m
Air Canada
Deal found 9/3$1,348
Sat 25/415:15
PDX
-
SYD
1 stop23h 05m
Air Canada
Sat 16/509:20
SYD
-
PDX
1 stop26h 45m
Air Canada
Deal found 6/3$1,349
Mon 27/409:50
PDX
-
SYD
1 stop28h 30m
Multiple Airlines
Wed 6/506:00
SYD
-
PDX
2 stops20h 30m
Multiple Airlines
Deal found 6/3$1,353

Find 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 11 March 2026.

Round-trip from

$1,325

One-way from

$606

Popular in

December

Cheapest in

September

Average price

$1,729
Air Canada
  • Air Canada
  • 22/6-21/7
  • 2 total stops
  • 40h 01m total
  • Portland to Sydney
Search Deals
Air Canada
  • Air Canada
  • 23/3
  • 1 total stop
  • 23h 20m total
  • Portland to Sydney
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($299 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($102 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 11 March 2026.
Use the filters below to find and compare flights from Portland to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandSydney

PDX - SYD

PDXSYD

Portland

Sat 22/8

14:56-14:00

2 stops30h 04m

Sydney Kingsford Smith

Wed 26/8

09:10-16:27

1 stop24h 17m

$1,790
Fastest return journey

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 22/6

08:35-07:00

3 stops29h 25m

Sydney Kingsford Smith

Tue 21/7

09:30-15:13

2 stops22h 43m

$1,832

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 15/4

05:00-07:00

2 stops33h 00m

Sydney Kingsford Smith

Thu 30/4

09:30-18:46

3 stops26h 16m

$2,019

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 25/3

14:50-12:35

2 stops27h 45m

Sydney Kingsford Smith

Wed 8/4

13:15-20:39

2 stops24h 24m

$2,102

PortlandSydney

PDX - SYD

PDXSYD

Portland

Wed 25/3

13:00-08:05

2 stops25h 05m

Sydney Kingsford Smith

Wed 8/4

09:30-11:41

3 stops67h 11m

$2,770

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 17/8

15:30-08:15

3 stops47h 45m

Sydney Kingsford Smith

Sat 5/9

22:10-13:10

3 stops56h 00m

$4,488

PortlandSydney

PDX - SYD

PDXSYD

Portland

Fri 4/9

13:45-06:05

3 stops47h 20m

Sydney Kingsford Smith

Sun 13/9

14:35-17:40

2 stops44h 05m

$5,034

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 27/4

13:52-06:05

3 stops47h 13m

Sydney Kingsford Smith

Wed 6/5

14:35-17:40

2 stops44h 05m

$5,114

PortlandSydney

PDX - SYD

PDXSYD

Portland

Tue 5/5

11:56-06:05

3 stops49h 09m

Sydney Kingsford Smith

Tue 12/5

14:35-17:40

2 stops44h 05m

$5,191
Cheapest one-way

PortlandSydney

PDX - SYD

PDXSYD

Portland

Mon 23/3

15:15-08:35

1 stop23h 20m

$606

Flights are sorted by cheapest return flights first.

Deals found on 6/3

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

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 return 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 return flight from Portland to Sydney. Price data was last updated on 6 March 2026.

The best time to book flights from Portland to Sydney is 67 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 $709). 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.

How much does it cost for a return flight from Portland to Sydney?

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 11 March 2026.
Read reviews from past customers who have flown with United Airlines from Portland to Sydney. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,414 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,414 reviews
United Airlines
7.4
Good
9,414 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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?

    Airlines like Qantas Airways and United Airlines fly from Portland to Sydney in about 29h 25m. The time it takes to get you to your destination can typically vary by up to 39m. The distance from Portland to Sydney is about 12350 km. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from Portland to Sydney round-trip?

    Cheapflights users have booked flights from Portland to Sydney round-trip from $1,349. You may be able to fly from Portland to Sydney for 21% less than the average price by searching for this airline.

  • 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 holiday 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 $709). 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

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Penrith
Manly
Katoomba
Terrigal
Lithgow
Bondi Beach
Coogee
Cronulla
Leura
Randwick

Browse thousands of different options on Cheapflights for your next trip

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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.
Boise to Sydney flights
Eugene to Sydney flights
Portland to Coolangatta flights

Top airline flying from Portland to Sydney

Discover the top airline 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 647,157 searches. Data last updated 11 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,349Average$2,506FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to Sydney?

Deals for Portland to Sydney flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Portland to Sydney?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Portland to Sydney.

Can Cheapflights find flights from Portland to Sydney with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Sydney flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Portland to Sydney become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Sydney from Portland today and book when prices fit your budget.

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