$492+ 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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Aug 2 — Aug 91
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Portland to Sydney with Cheapflights
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Portland to Sydney
Cheapest
Best
Last-minute
One-way
Cheapest flights from Portland to SydneyExplore 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, 2026.
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, 2026.
This Trip.com deal was found by Cheapflights users on 6/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/185:30 pm
PDX
- SYD
2 stops25h 20m
Multiple Airlines
Thu 9/241:15 pm
SYD
- PDX
3 stops44h 20m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$974
This BusinessClass deal was found by Cheapflights users on 6/29. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1310:30 am
PDX
- SYD
1 stop38h 20m
Alaska Airlines
Tue 10/279:40 pm
SYD
- PDX
1 stop17h 09m
Alaska Airlines
Deal found 6/29![Alaska Airlines logo]()
$1,081
This BusinessClass deal was found by Cheapflights users on 6/30. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/210:30 am
PDX
- SYD
1 stop39h 20m
Alaska Airlines
Tue 8/258:45 pm
SYD
- PDX
1 stop26h 29m
Alaska Airlines
Deal found 6/30![Alaska Airlines logo]()
$1,095
This BusinessClass deal was found by Cheapflights users on 6/29. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:46 am
PDX
- SYD
1 stop18h 04m
Alaska Airlines
Thu 7/98:45 pm
SYD
- PDX
1 stop26h 26m
Alaska Airlines
Deal found 6/29![Alaska Airlines logo]()
$1,110
This BusinessClass deal was found by Cheapflights users on 6/30. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/107:46 am
PDX
- SYD
1 stop18h 04m
Alaska Airlines
Thu 8/208:45 pm
SYD
- PDX
1 stop17h 01m
Alaska Airlines
Deal found 6/30![Alaska Airlines logo]()
$1,112
This Expedia deal was found by Cheapflights users on 7/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:48 pm
PDX
- SYD
2 stops42h 37m
Multiple Airlines
Sat 8/2211:45 am
SYD
- PDX
2 stops38h 40m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$1,127
This BusinessClass deal was found by Cheapflights users on 6/28. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2310:30 am
PDX
- SYD
1 stop39h 20m
Alaska Airlines
Fri 8/288:45 pm
SYD
- PDX
1 stop17h 01m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$1,128
This BusinessClass deal was found by Cheapflights users on 6/30. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1510:30 am
PDX
- SYD
1 stop38h 15m
Alaska Airlines
Sat 11/219:40 pm
SYD
- PDX
1 stop27h 20m
Alaska Airlines
Deal found 6/30![Alaska Airlines logo]()
$1,129
This Hawaiian Airlines deal was found by Cheapflights users on 6/29. 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.
Tue 10/1310:30 am
PDX
- SYD
1 stop38h 20m
Alaska Airlines
Sun 10/259:40 pm
SYD
- PDX
1 stop26h 39m
Alaska Airlines
Deal found 6/29![Alaska Airlines logo]()
$1,131
This BusinessClass 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/110:30 am
PDX
- SYD
1 stop38h 15m
Alaska Airlines
Sun 12/139:40 pm
SYD
- PDX
1 stop27h 20m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$1,133
Best flights from Portland to SydneyDiscover carefully curated flight deals from Portland to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2026.
Discover carefully curated flight deals from Portland to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2026.
This United Airlines deal was found by Cheapflights users on 6/29. 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.
Mon 8/313:43 pm
PDX
- SYD
1 stop22h 12m
United Airlines
Sun 9/1310:20 am
SYD
- PDX
1 stop18h 40m
United Airlines
Deal found 6/29![United Airlines logo]()
$1,186
This Air Canada deal was found by Cheapflights users on 6/28. 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.
Thu 10/17:45 pm
PDX
- SYD
1 stop18h 35m
Multiple Airlines
Thu 10/86:00 am
SYD
- PDX
2 stops21h 31m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$1,264
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:29 am
PDX
- SYD
2 stops28h 21m
Delta
Sun 9/209:15 am
SYD
- PDX
2 stops23h 50m
Delta
Deal found 7/1![Delta logo]()
$1,360
This Hawaiian 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/105:50 pm
PDX
- SYD
1 stop30h 55m
Alaska Airlines
Fri 1/19:40 pm
SYD
- PDX
1 stop18h 10m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$2,079
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:15 pm
PDX
- SYD
1 stop18h 40m
United Airlines
Sat 9/129:30 am
SYD
- PDX
2 stops28h 35m
United Airlines
Deal found 7/1![United Airlines logo]()
$1,240
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Thu 10/155:00 am
PDX
- SYD
2 stops33h 00m
United Airlines
Wed 10/2810:20 am
SYD
- PDX
3 stops26h 09m
United Airlines
Deal found 6/30![United Airlines logo]()
$1,360
This Alaska Airlines deal was found by Cheapflights users on 6/29. 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.
Mon 12/1410:30 am
PDX
- SYD
1 stop38h 15m
Multiple Airlines
Mon 12/219:40 pm
SYD
- PDX
2 stops30h 45m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$1,906
This United Airlines deal was found by Cheapflights users on 6/29. 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.
Sat 12/125:15 am
PDX
- SYD
2 stops32h 50m
United Airlines
Thu 12/241:20 pm
SYD
- PDX
1 stop30h 34m
United Airlines
Deal found 6/29![United Airlines logo]()
$1,608
This Air Tahiti Nui 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 Air Tahiti Nui is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/179:27 pm
PDX
- SYD
3 stops48h 43m
Multiple Airlines
Sat 9/125:50 pm
SYD
- PDX
3 stops39h 46m
Multiple Airlines
Deal found 7/1![Multiple Airlines logo]()
$2,526
This China 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/15:20 pm
PDX
- SYD
3 stops47h 55m
Multiple Airlines
Sun 12/1310:10 pm
SYD
- PDX
2 stops45h 00m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$2,533
Last-minute flights from Portland to SydneyDiscover last-minute flight deals from Portland to Sydney. Data last updated July 3, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Sydney. Data last updated July 3, 2026 and is based on user searches.
This BusinessClass deal was found by Cheapflights users on 6/29. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/27:46 am
PDX
- SYD
1 stop18h 04m
Alaska Airlines
Tue 7/78:45 pm
SYD
- PDX
1 stop17h 05m
Alaska Airlines
Deal found 6/29![Alaska Airlines logo]()
$1,124
This BusinessClass deal was found by Cheapflights users on 6/29. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/37:46 am
PDX
- SYD
1 stop18h 04m
Alaska Airlines
Sun 7/58:45 pm
SYD
- PDX
1 stop26h 26m
Alaska Airlines
Deal found 6/29![Alaska Airlines logo]()
$1,110
This Ovago deal was found by Cheapflights users on 6/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/61:14 pm
PDX
- SYD
1 stop24h 41m
Air New Zealand
Sun 7/2610:20 am
SYD
- PDX
1 stop18h 54m
Air New Zealand
Deal found 6/29![Air New Zealand logo]()
$1,173
This BusinessClass 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/317:46 am
PDX
- SYD
1 stop18h 04m
Alaska Airlines
Fri 8/78:45 pm
SYD
- PDX
1 stop26h 26m
Alaska Airlines
Deal found 7/1![Alaska Airlines logo]()
$1,146
This BusinessClass deal was found by Cheapflights users on 6/30. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/210:30 am
PDX
- SYD
1 stop39h 20m
Alaska Airlines
Tue 8/258:45 pm
SYD
- PDX
1 stop26h 29m
Alaska Airlines
Deal found 6/30![Alaska Airlines logo]()
$1,095
This Jetabroad deal was found by Cheapflights users on 6/30. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/210:10 am
PDX
- SYD
2 stops30h 15m
Multiple Airlines
Tue 8/2511:45 am
SYD
- PDX
2 stops38h 40m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$1,175
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:08 pm
PDX
- SYD
1 stop21h 22m
American Airlines
Sun 8/169:10 am
SYD
- PDX
1 stop31h 49m
American Airlines
Deal found 7/1![American Airlines logo]()
$1,172
This BusinessClass deal was found by Cheapflights users on 6/30. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/107:46 am
PDX
- SYD
1 stop18h 04m
Alaska Airlines
Thu 8/208:45 pm
SYD
- PDX
1 stop17h 01m
Alaska Airlines
Deal found 6/30![Alaska Airlines logo]()
$1,112
This Expedia deal was found by Cheapflights users on 7/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:48 pm
PDX
- SYD
2 stops42h 37m
Multiple Airlines
Sat 8/2211:45 am
SYD
- PDX
2 stops38h 40m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$1,127
This BusinessClass deal was found by Cheapflights users on 6/28. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/228:00 am
PDX
- SYD
1 stop17h 50m
Alaska Airlines
Sat 10/38:45 pm
SYD
- PDX
1 stop17h 01m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$1,158
This BusinessClass deal was found by Cheapflights users on 6/28. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2310:30 am
PDX
- SYD
1 stop39h 20m
Alaska Airlines
Fri 8/288:45 pm
SYD
- PDX
1 stop17h 01m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$1,128
This Justfly.com deal was found by Cheapflights users on 6/28. 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.
Mon 8/312:53 pm
PDX
- SYD
1 stop23h 37m
Qantas Airways
Sun 9/135:50 pm
SYD
- PDX
1 stop21h 05m
Qantas Airways
Deal found 6/28![Qantas Airways logo]()
$1,161
One-way flights from Portland to SydneySearch for one-way flight options from Portland to Sydney. Find affordable one-way fares based on user searches. Data last updated July 3, 2026.
Search for one-way flight options from Portland to Sydney. Find affordable one-way fares based on user searches. Data last updated July 3, 2026.
This Trip.com deal was found by Cheapflights users on 6/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:36 pm
PDX
- SYD
2 stops25h 14m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$492
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/162:42 pm
PDX
- SYD
3 stops28h 08m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$504
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:30 pm
PDX
- SYD
2 stops25h 20m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$510
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:56 pm
PDX
- SYD
3 stops48h 54m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$548
This SmartFares deal was found by Cheapflights users on 6/30. 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.
Tue 9/810:30 am
PDX
- SYD
1 stop39h 20m
Alaska Airlines
Deal found 6/30![Alaska Airlines logo]()
$586
This BusinessClass deal was found by Cheapflights users on 6/30. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1510:30 am
PDX
- SYD
1 stop39h 20m
Alaska Airlines
Deal found 6/30![Alaska Airlines logo]()
$590
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 July 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $974 (Trip.com) |
One-way from | $492 (Trip.com) |
Popular in | December |
Cheapest in | September |
Average price | $1,300 |
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, 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
Cheapest round-trip
PortlandSydney
PDX - SYD
PDXSYD
Portland
Mon 8/31
3:43 pm-6:55 am
1 stop22h 12m
Sydney Kingsford Smith
Sun 9/13
10:20 am-12:00 pm
1 stop18h 40m
$1,186
PortlandSydney
PDX - SYD
PDXSYD
Portland
Mon 8/17
7:15 pm-6:55 am
1 stop18h 40m
Sydney Kingsford Smith
Sat 9/12
9:30 am-9:05 pm
2 stops28h 35m
$1,240
Quickest round-trip
PortlandSydney
PDX - SYD
PDXSYD
Portland
Thu 10/1
7:45 pm-7:20 am
1 stop18h 35m
Sydney Kingsford Smith
Thu 10/8
6:00 am-9:31 am
2 stops21h 31m
$1,264
PortlandSydney
PDX - SYD
PDXSYD
Portland
Thu 9/3
9:29 am-6:50 am
2 stops28h 21m
Sydney Kingsford Smith
Sun 9/20
9:15 am-4:05 pm
2 stops23h 50m
$1,360
PortlandSydney
PDX - SYD
PDXSYD
Portland
Thu 10/15
5:00 am-8:00 am
2 stops33h 00m
Sydney Kingsford Smith
Wed 10/28
10:20 am-6:29 pm
3 stops26h 09m
$1,360
PortlandSydney
PDX - SYD
PDXSYD
Portland
Sat 12/12
5:15 am-9:05 am
2 stops32h 50m
Sydney Kingsford Smith
Thu 12/24
1:20 pm-12:54 am
1 stop30h 34m
$1,608
PortlandSydney
PDX - SYD
PDXSYD
Portland
Mon 12/14
10:30 am-7:45 pm
1 stop38h 15m
Sydney Kingsford Smith
Mon 12/21
9:40 pm-9:25 am
2 stops30h 45m
$1,906
PortlandSydney
PDX - SYD
PDXSYD
Portland
Thu 12/10
5:50 pm-7:45 pm
1 stop30h 55m
Sydney Kingsford Smith
Fri 1/1
9:40 pm-8:50 pm
1 stop18h 10m
$2,079
PortlandSydney
PDX - SYD
PDXSYD
Portland
Mon 8/17
9:27 pm-3:10 pm
3 stops48h 43m
Sydney Kingsford Smith
Sat 9/12
5:50 pm-4:36 pm
3 stops39h 46m
$2,526
PortlandSydney
PDX - SYD
PDXSYD
Portland
Tue 12/1
5:20 pm-12:15 pm
3 stops47h 55m
Sydney Kingsford Smith
Sun 12/13
10:10 pm-12:10 am
2 stops45h 00m
$2,533
Showing 1-10 of 15 resultsSorted by cheapest first
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 July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Portland-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Sydney flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
PDX-SYD
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
Prices
More
How far ahead should I book a flight from Portland to Sydney?
Booking 34 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, September is the cheapest month in which you can book a flight from Portland to Sydney (average of $981). Flying from Portland to Sydney in December is currently the most expensive (average of $1,781). 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 to fly round-trip from Portland to Sydney?
What’s the top layover airport for flights from Portland to Sydney?
Share of 1-stop round-trip flights from Portland to Sydney chosen by Cheapflights users in the past 12 months, using the same layover each way.
Los Angeles (LAX) – chosen by Cheapflights users on 33% of 1-stop itineraries from Portland to Sydney on Cheapflights.
What’s the cheapest layover airport for flights from Portland to Sydney?
Average round-trip fare for 1-stop flights from Portland to Sydney, chosen by Cheapflights users in the past 12 months, with the same layover each way.
San Francisco (SFO) is the most affordable 1-stop option, with an average round-trip price of $1,055.
What’s the fastest layover option from Portland to Sydney?
Shortest average travel time for 1-stop one-way flights from Portland to Sydney, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via San Francisco (SFO) have the shortest average one-way travel time for 1-stop routes: 18h 29m.
Which airport typically offers the quickest layover for flights from Portland to Sydney?
Average layover duration for 1-stop one-way flights from Portland to Sydney, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via San Francisco (SFO) offer the fastest connection on this route, with an average layover time of 2h 47m.
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, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Qantas Airways, andUnited 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.
Crew
8.5
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.1
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Crew
8.5
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.1
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Crew
8.5
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.1
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Crew
8.5
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.1
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Crew
8.5
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.1
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Crew
8.5
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.1
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
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.
Traveling to a place near Sydney?
Book flights to Sydney if you plan to visit one of these locationsParramatta
Wollongong
Coogee
Manly
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Portland
Popular flights
Sydney flight routes
Alternative routes for Portland to Sydney
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Sydney by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Portland to Sydney by cabin class
Find flights from Portland to Sydney, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Portland and Sydney flights
Browse other Portland and Sydney flight options. Last updated on July 3, 2026.
Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on July 3, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Sydney
Explore flights to Sydney departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 3, 2026.
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, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$497 | Average$1,277 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$550 | Average$1,153 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$830 | Average$1,217 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$884 | Average$1,153 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$954 | Average$974 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$967 | Average$1,154 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$999 | Average$1,182 | FlexibilityNo cancel fee | On-time75% |