$563+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Sep 1 — Sep 81
Round-trip
1 adult, Economy
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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 August 2, 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 August 2, 2026.
This SmartFares deal was found by Cheapflights users on 7/29. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:46 am
PDX
- SYD
1 stop18h 04m
Alaska Airlines
Sun 8/308:45 pm
SYD
- PDX
1 stop26h 29m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$1,041
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Wed 8/198:00 am
PDX
- SYD
1 stop17h 50m
Multiple Airlines
Wed 9/91:15 pm
SYD
- PDX
2 stops37h 52m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$1,071
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Mon 8/177:46 am
PDX
- SYD
1 stop18h 04m
Multiple Airlines
Fri 8/281:15 pm
SYD
- PDX
2 stops39h 20m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$1,076
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/42:45 pm
PDX
- SYD
1 stop20h 40m
Multiple Airlines
Tue 11/102:00 pm
SYD
- PDX
2 stops25h 31m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$1,078
This SmartFares deal was found by Cheapflights users on 8/1. 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.
Wed 10/288:00 am
PDX
- SYD
1 stop17h 45m
Alaska Airlines
Tue 11/39:40 pm
SYD
- PDX
1 stop18h 09m
Alaska Airlines
Deal found 8/1![Alaska Airlines logo]()
$1,084
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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.
Mon 8/177:46 am
PDX
- SYD
1 stop18h 04m
Alaska Airlines
Sun 8/238:45 pm
SYD
- PDX
1 stop26h 29m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$1,094
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/42:45 pm
PDX
- SYD
1 stop20h 40m
Multiple Airlines
Sun 11/82:00 pm
SYD
- PDX
2 stops28h 10m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$1,098
This Hawaiian Airlines deal was found by Cheapflights users on 7/31. 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.
Wed 10/288:00 am
PDX
- SYD
1 stop17h 45m
Alaska Airlines
Sun 11/19:40 pm
SYD
- PDX
1 stop18h 09m
Alaska Airlines
Deal found 7/31![Alaska Airlines logo]()
$1,100
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 August 2, 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 August 2, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/268:00 am
PDX
- SYD
1 stop17h 50m
Multiple Airlines
Sun 8/308:45 pm
SYD
- PDX
2 stops29h 48m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$1,270
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Wed 10/2812:57 pm
PDX
- SYD
1 stop24h 03m
United Airlines
Sun 11/19:15 am
SYD
- PDX
3 stops28h 09m
United Airlines
Deal found 8/1![United Airlines logo]()
$1,501
This Air Tahiti Nui deal was found by Cheapflights users on 8/2. 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 Air Tahiti Nui is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/59:30 pm
PDX
- SYD
3 stops52h 35m
Air Tahiti Nui
Thu 10/158:55 am
SYD
- PDX
3 stops25h 39m
Air Tahiti Nui
Deal found 8/2![Air Tahiti Nui logo]()
$2,518
This Asiana Airlines deal was found by Cheapflights users on 7/30. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:15 pm
PDX
- SYD
2 stops31h 10m
Asiana Airlines
Thu 8/279:00 pm
SYD
- PDX
2 stops40h 59m
Asiana Airlines
Deal found 7/30![Asiana Airlines logo]()
$3,065
This Malaysia Airlines deal was found by Cheapflights users on 7/30. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:30 pm
PDX
- SYD
2 stops45h 30m
Malaysia Airlines
Sun 9/1312:45 pm
SYD
- PDX
3 stops47h 51m
Malaysia Airlines
Deal found 7/30![Malaysia Airlines logo]()
$3,503
This Malaysia Airlines deal was found by Cheapflights users on 8/1. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:26 pm
PDX
- SYD
3 stops47h 29m
Multiple Airlines
Tue 11/310:15 pm
SYD
- PDX
3 stops42h 45m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$2,780
This Malaysia Airlines deal was found by Cheapflights users on 7/28. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/221:38 pm
PDX
- SYD
3 stops47h 47m
Multiple Airlines
Sat 10/39:15 am
SYD
- PDX
2 stops49h 25m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$3,135
This Malaysia Airlines deal was found by Cheapflights users on 8/1. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:30 pm
PDX
- SYD
2 stops45h 30m
Multiple Airlines
Sun 9/1310:10 pm
SYD
- PDX
3 stops42h 13m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$3,243
This Malaysia Airlines deal was found by Cheapflights users on 7/30. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:26 pm
PDX
- SYD
3 stops46h 29m
Multiple Airlines
Mon 10/191:45 pm
SYD
- PDX
3 stops47h 56m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$3,302
This Malaysia Airlines deal was found by Cheapflights users on 8/1. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/142:07 pm
PDX
- SYD
3 stops47h 23m
Multiple Airlines
Tue 9/2912:45 pm
SYD
- PDX
3 stops47h 51m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$3,390
This Malaysia Airlines deal was found by Cheapflights users on 8/2. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/31:38 pm
PDX
- SYD
3 stops47h 47m
Multiple Airlines
Sun 9/2012:45 pm
SYD
- PDX
3 stops47h 51m
Multiple Airlines
Deal found 8/2![Multiple Airlines logo]()
$3,435
Last-minute flights from Portland to SydneyDiscover last-minute flight deals from Portland to Sydney. Data last updated August 2, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Sydney. Data last updated August 2, 2026 and is based on user searches.
This SmartFares deal was found by Cheapflights users on 7/30. 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.
Sun 8/25:32 pm
PDX
- SYD
1 stop32h 18m
Alaska Airlines
Tue 8/118:45 pm
SYD
- PDX
1 stop26h 26m
Alaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$1,101
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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.
Sun 8/165:32 pm
PDX
- SYD
1 stop32h 18m
Alaska Airlines
Sun 8/238:45 pm
SYD
- PDX
1 stop26h 29m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$1,106
This SmartFares deal was found by Cheapflights users on 7/29. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:46 am
PDX
- SYD
1 stop18h 04m
Alaska Airlines
Sun 8/308:45 pm
SYD
- PDX
1 stop26h 29m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$1,041
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Mon 8/177:46 am
PDX
- SYD
1 stop18h 04m
Multiple Airlines
Fri 8/281:15 pm
SYD
- PDX
2 stops39h 20m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$1,076
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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.
Mon 8/177:46 am
PDX
- SYD
1 stop18h 04m
Alaska Airlines
Sun 8/238:45 pm
SYD
- PDX
1 stop26h 29m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$1,094
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Mon 8/177:46 am
PDX
- SYD
1 stop18h 04m
Multiple Airlines
Wed 8/261:15 pm
SYD
- PDX
2 stops39h 20m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$1,109
This Bravofly deal was found by Cheapflights users on 7/29. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/185:36 pm
PDX
- SYD
1 stop19h 49m
Qantas Airways
Tue 8/255:30 pm
SYD
- PDX
2 stops23h 29m
Qantas Airways
Deal found 7/29![Qantas Airways logo]()
$1,104
This Ovago deal was found by Cheapflights users on 7/30. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:30 am
PDX
- SYD
1 stop39h 20m
Alaska Airlines
Sun 8/308:45 pm
SYD
- PDX
1 stop26h 29m
Alaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$1,112
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Wed 8/198:00 am
PDX
- SYD
1 stop17h 50m
Multiple Airlines
Wed 9/91:15 pm
SYD
- PDX
2 stops37h 52m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$1,071
This Hawaiian Airlines deal was found by Cheapflights users on 7/28. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:00 am
PDX
- SYD
1 stop17h 50m
Alaska Airlines
Sun 8/308:45 pm
SYD
- PDX
1 stop26h 29m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$1,103
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 August 2, 2026.
Search for one-way flight options from Portland to Sydney. Find affordable one-way fares based on user searches. Data last updated August 2, 2026.
This SmartFares deal was found by Cheapflights users on 7/28. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/168:00 am
PDX
- SYD
1 stop17h 50m
Alaska Airlines
Deal found 7/28![Alaska Airlines logo]()
$563
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:48 pm
PDX
- SYD
3 stops45h 47m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$568
This Hawaiian Airlines deal was found by Cheapflights users on 8/2. 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.
Tue 9/1510:30 am
PDX
- SYD
1 stop39h 20m
Alaska Airlines
Deal found 8/2![Alaska Airlines logo]()
$600
This Expedia deal was found by Cheapflights users on 8/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/153:30 pm
PDX
- SYD
1 stop22h 50m
Air Canada
Deal found 8/1![Air Canada logo]()
$613
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3110:00 am
PDX
- SYD
1 stop28h 35m
Air Canada
Deal found 7/29![Air Canada logo]()
$617
This FlightHub deal was found by Cheapflights users on 8/2. 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.
Tue 9/157:45 pm
PDX
- SYD
2 stops25h 00m
Multiple Airlines
Deal found 8/2![Multiple Airlines logo]()
$639
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/167:03 am
PDX
- SYD
1 stop31h 27m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$691
This oojo deal was found by Cheapflights users on 8/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:00 pm
PDX
- SYD
2 stops44h 05m
Qantas Airways
Deal found 8/1![Qantas Airways logo]()
$695
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/159:34 pm
PDX
- SYD
3 stops51h 16m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$744
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 August 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,041 (SmartFares) |
One-way from | $563 (SmartFares) |
Popular in | December |
Cheapest in | September |
Average price | $1,210 |
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 August 2, 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
Quickest round-trip
PortlandSydney
PDX - SYD
PDXSYD
Portland
Wed 8/26
8:00 am-6:50 pm
1 stop17h 50m
Sydney Kingsford Smith
Sun 8/30
8:45 pm-9:33 am
2 stops29h 48m
$1,270
PortlandSydney
PDX - SYD
PDXSYD
Portland
Wed 10/28
12:57 pm-7:00 am
1 stop24h 03m
Sydney Kingsford Smith
Sun 11/1
9:15 am-7:24 pm
3 stops28h 09m
$1,501
PortlandSydney
PDX - SYD
PDXSYD
Portland
Mon 10/5
9:30 pm-8:05 pm
3 stops52h 35m
Sydney Kingsford Smith
Thu 10/15
8:55 am-4:34 pm
3 stops25h 39m
$2,518
PortlandSydney
PDX - SYD
PDXSYD
Portland
Wed 10/28
2:26 pm-7:55 am
3 stops47h 29m
Sydney Kingsford Smith
Tue 11/3
10:15 pm-10:00 pm
3 stops42h 45m
$2,780
PortlandSydney
PDX - SYD
PDXSYD
Portland
Wed 8/19
7:15 pm-7:25 pm
2 stops31h 10m
Sydney Kingsford Smith
Thu 8/27
9:00 pm-8:59 pm
2 stops40h 59m
$3,065
PortlandSydney
PDX - SYD
PDXSYD
Portland
Sat 8/22
1:38 pm-6:25 am
3 stops47h 47m
Sydney Kingsford Smith
Sat 10/3
9:15 am-5:40 pm
2 stops49h 25m
$3,135
PortlandSydney
PDX - SYD
PDXSYD
Portland
Mon 8/31
7:30 pm-10:00 am
2 stops45h 30m
Sydney Kingsford Smith
Sun 9/13
10:10 pm-11:23 pm
3 stops42h 13m
$3,243
PortlandSydney
PDX - SYD
PDXSYD
Portland
Fri 10/16
2:26 pm-6:55 am
3 stops46h 29m
Sydney Kingsford Smith
Mon 10/19
1:45 pm-7:41 pm
3 stops47h 56m
$3,302
PortlandSydney
PDX - SYD
PDXSYD
Portland
Mon 9/14
2:07 pm-6:30 am
3 stops47h 23m
Sydney Kingsford Smith
Tue 9/29
12:45 pm-7:36 pm
3 stops47h 51m
$3,390
PortlandSydney
PDX - SYD
PDXSYD
Portland
Thu 9/3
1:38 pm-6:25 am
3 stops47h 47m
Sydney Kingsford Smith
Sun 9/20
12:45 pm-7:36 pm
3 stops47h 51m
$3,435
Showing 1-10 of 22 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 August.
| 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 Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| 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
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How far ahead should I book a flight from Portland to Sydney?
Booking 54 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 $1,069). Flying from Portland to Sydney in December is currently the most expensive (average of $1,787). 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?
Airfare is below average for this route at the moment.
Portland to Sydney flights typically cost between $1,155 and $1,264 in August.The cheapest round-trip price found within the last 5 days was $1,041 on Alaska Airlines (Aug 17-Aug 30).
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 40% 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 $1,280.
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 37m.
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 1h 51m.
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 August 2, 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.
Comfort
7.8
Food
7.0
Entertainment
7.0
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Food
7.0
Entertainment
7.0
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Food
7.0
Entertainment
7.0
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Food
7.0
Entertainment
7.0
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Food
7.0
Entertainment
7.0
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Comfort
7.8
Food
7.0
Entertainment
7.0
Boarding
8.1
Overall
7.9
Crew
8.5
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
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Complete your trip
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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 August 2, 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 August 2, 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 August 2, 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 August 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$497 | Average$1,279 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$550 | Average$1,148 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$886 | Average$1,170 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$954 | Average$974 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$968 | Average$1,280 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$970 | Average$1,154 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$999 | Average$1,211 | FlexibilityNo cancel fee | On-time75% |