$566+ Cheap flights from Portland (PDX) to Sydney (SYD)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SYD
Oct 30 — Nov 61
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 September 30, 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 September 30, 2026.
This lol.travel deal was found by Cheapflights users on 9/29. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/93:15 pm -
1 stop23h 20m
Sun 11/2211:20 am -
1 stop22h 21m
Deal found 9/29![Air Canada logo]()
$1,092
This SmartFares deal was found by Cheapflights users on 9/29. 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.
Sun 11/110:30 am -
1 stop38h 15m
Sun 11/229:40 pm -
1 stop27h 24m
Deal found 9/29![Multiple Airlines logo]()
$1,100
This lol.travel deal was found by Cheapflights users on 9/29. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:10 pm -
1 stop19h 25m
Sun 11/229:00 am -
2 stops19h 26m
Deal found 9/29![Multiple Airlines logo]()
$1,105
This Qantas Airways deal was found by Cheapflights users on 9/25. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/255:18 pm -
1 stop19h 07m
Sun 11/111:10 am -
1 stop18h 40m
Deal found 9/25![Qantas Airways logo]()
$1,124
This SmartFares deal was found by Cheapflights users on 9/30. 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.
Mon 11/97:00 am -
1 stop17h 45m
Sat 11/219:40 pm -
1 stop27h 24m
Deal found 9/30![Multiple Airlines logo]()
$1,132
This Qantas Airways deal was found by Cheapflights users on 9/26. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/12:50 pm -
1 stop20h 35m
Mon 11/911:10 am -
1 stop21h 40m
Deal found 9/26![Multiple Airlines logo]()
$1,133
This oojo deal was found by Cheapflights users on 9/27. 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.
Sun 11/18:28 pm -
2 stops45h 07m
Thu 11/122:00 pm -
2 stops21h 34m
Deal found 9/27![Multiple Airlines logo]()
$1,139
This United Airlines deal was found by Cheapflights users on 9/26. 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.
Sun 11/17:15 pm -
2 stops40h 45m
Mon 11/99:15 am -
1 stop21h 58m
Deal found 9/26![United Airlines logo]()
$1,142
This SmartFares deal was found by Cheapflights users on 9/27. 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 11/15:50 pm -
1 stop30h 55m
Thu 11/129:40 pm -
1 stop18h 09m
Deal found 9/27![Alaska Airlines logo]()
$1,150
This FlightHub deal was found by Cheapflights users on 9/26. 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.
Sun 11/16:04 pm -
2 stops23h 31m
Sun 11/82:00 pm -
2 stops23h 43m
Deal found 9/26![Multiple Airlines logo]()
$1,153
This Ovago deal was found by Cheapflights users on 9/26. 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.
Thu 11/2610:30 am -
1 stop38h 15m
Tue 12/89:40 pm -
1 stop27h 22m
Deal found 9/26![Multiple Airlines logo]()
$1,156
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 September 30, 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 September 30, 2026.
This United Airlines deal was found by Cheapflights users on 9/25. 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.
Sun 10/187:29 pm -
1 stop18h 26m
Fri 10/3010:55 am -
2 stops30h 14m
Deal found 9/25![United Airlines logo]()
$1,193
This Qantas Airways deal was found by Cheapflights users on 9/27. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:30 pm -
2 stops25h 45m
Wed 11/49:25 pm -
1 stop18h 22m
Deal found 9/27![Qantas Airways logo]()
$1,294
This Air New Zealand deal was found by Cheapflights users on 9/26. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/103:44 pm -
2 stops21h 51m
Tue 12/2211:50 am -
2 stops22h 41m
Deal found 9/26![Multiple Airlines logo]()
$1,324
This Delta deal was found by Cheapflights users on 9/27. 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.
Sat 11/149:58 am -
2 stops27h 32m
Sat 11/2810:40 am -
2 stops27h 15m
Deal found 9/27![Delta logo]()
$1,522
This United Airlines deal was found by Cheapflights users on 9/26. 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.
Fri 11/271:15 pm -
2 stops24h 50m
Thu 12/1011:50 am -
1 stop19h 25m
Deal found 9/26![United Airlines logo]()
$1,452
This Alaska Airlines deal was found by Cheapflights users on 9/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/67:00 am -
1 stop17h 45m
Thu 1/289:40 pm -
2 stops19h 37m
Deal found 9/30![Multiple Airlines logo]()
$1,597
This United Airlines deal was found by Cheapflights users on 9/29. 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 2/131:30 pm -
2 stops24h 35m
Sat 2/209:20 am -
3 stops28h 06m
Deal found 9/29![United Airlines logo]()
$1,452
This Delta deal was found by Cheapflights users on 9/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/55:10 pm -
1 stop18h 40m
Wed 1/2710:40 am -
1 stop24h 33m
Deal found 9/30![Delta logo]()
$1,682
This Alaska Airlines deal was found by Cheapflights users on 9/25. 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.
Sat 12/199:24 pm -
2 stops27h 21m
Tue 12/299:40 pm -
2 stops27h 24m
Deal found 9/25![Multiple Airlines logo]()
$2,217
This United Airlines deal was found by Cheapflights users on 9/27. 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 12/217:16 pm -
1 stop40h 04m
Tue 1/129:20 am -
1 stop21h 59m
Deal found 9/27![United Airlines logo]()
$2,107
This Malaysia Airlines deal was found by Cheapflights users on 9/25. 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.
Sun 10/252:25 pm -
3 stops47h 30m
Sun 11/110:15 pm -
3 stops44h 28m
Deal found 9/25![Multiple Airlines logo]()
$2,727
Last-minute flights from Portland to SydneyDiscover last-minute flight deals from Portland to Sydney. Data last updated September 30, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Sydney. Data last updated September 30, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 9/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:45 pm -
1 stop18h 35m
Wed 10/710:20 am -
1 stop22h 26m
Deal found 9/29![Air Canada logo]()
$1,173
This oojo deal was found by Cheapflights users on 9/25. 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.
Sun 10/187:18 am -
1 stop29h 07m
Fri 10/309:25 pm -
1 stop19h 49m
Deal found 9/25![Multiple Airlines logo]()
$1,186
This United Airlines deal was found by Cheapflights users on 9/25. 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.
Sun 10/187:29 pm -
1 stop18h 26m
Fri 10/3010:55 am -
2 stops30h 14m
Deal found 9/25![United Airlines logo]()
$1,193
This FlightHub deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:18 pm -
1 stop20h 47m
Mon 11/211:10 am -
1 stop18h 40m
Deal found 9/26![Qantas Airways logo]()
$1,178
This American Airlines deal was found by Cheapflights users on 9/26. 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.
Fri 10/233:00 pm -
2 stops23h 05m
Mon 11/22:05 pm -
1 stop22h 43m
Deal found 9/26![American Airlines logo]()
$1,189
This United Airlines deal was found by Cheapflights users on 9/26. 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.
Fri 10/231:03 pm -
1 stop24h 52m
Mon 11/29:15 am -
3 stops28h 09m
Deal found 9/26![United Airlines logo]()
$1,192
This Ovago deal was found by Cheapflights users on 9/26. 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.
Sat 10/248:00 am -
1 stop17h 45m
Sat 10/319:40 pm -
1 stop17h 09m
Deal found 9/26![Alaska Airlines logo]()
$1,176
This Qantas Airways deal was found by Cheapflights users on 9/25. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/255:18 pm -
1 stop19h 07m
Sun 11/111:10 am -
1 stop18h 40m
Deal found 9/25![Qantas Airways logo]()
$1,124
This oojo deal was found by Cheapflights users on 9/25. 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.
Sun 10/2510:00 am -
2 stops28h 35m
Sun 11/19:55 am -
2 stops27h 36m
Deal found 9/25![Air New Zealand logo]()
$1,185
This Air Canada deal was found by Cheapflights users on 9/25. 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.
Tue 10/2710:00 am -
1 stop28h 35m
Mon 11/211:20 am -
1 stop22h 21m
Deal found 9/25![Air Canada logo]()
$1,174
This FlightHub deal was found by Cheapflights users on 9/26. 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.
Wed 10/282:30 pm -
2 stops26h 05m
Tue 11/311:50 am -
2 stops25h 41m
Deal found 9/26![Multiple Airlines logo]()
$1,180
This FlightHub deal was found by Cheapflights users on 9/26. 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.
Wed 10/283:20 pm -
1 stop23h 15m
Tue 11/39:00 am -
2 stops24h 41m
Deal found 9/26![Air Canada logo]()
$1,199
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 September 30, 2026.
Search for one-way flight options from Portland to Sydney. Find affordable one-way fares based on user searches. Data last updated September 30, 2026.
This Qantas Airways deal was found by Cheapflights users on 9/26. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/245:40 pm -
1 stop21h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![Qantas Airways logo]()
$566
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 1/272:46 pm -
2 stops44h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Multiple Airlines logo]()
$580
This SmartFares deal was found by Cheapflights users on 9/27. 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 11/2910:30 am -
1 stop38h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Alaska Airlines logo]()
$586
This oojo deal was found by Cheapflights users on 9/27. 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.
Sun 11/12:50 pm -
1 stop20h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Multiple Airlines logo]()
$589
This United Airlines deal was found by Cheapflights users on 9/27. 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.
Sun 11/15:00 am -
2 stops33h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![United Airlines logo]()
$592
This Qantas Airways deal was found by Cheapflights users on 9/26. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/255:40 pm -
1 stop21h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![Qantas Airways logo]()
$611
This Qantas Airways deal was found by Cheapflights users on 9/26. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/311:30 pm -
1 stop21h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![Multiple Airlines logo]()
$612
This Kiwi.com deal was found by Cheapflights users on 9/29. 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.
Thu 12/244:35 pm -
2 stops42h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Multiple Airlines logo]()
$613
This Kiwi.com deal was found by Cheapflights users on 9/27. 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 3/17:00 am -
2 stops55h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Multiple Airlines logo]()
$623
This Travelocity deal was found by Cheapflights users on 9/27. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/247:10 pm -
1 stop19h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Air Canada logo]()
$640
This FlightHub deal was found by Cheapflights users on 9/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/241:20 pm -
2 stops29h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Multiple Airlines logo]()
$647
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 September 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,092 (lol.travel) |
One-way from | $566 (Qantas Airways) |
Popular in | December |
Cheapest in | September |
Average price | $1,070 |
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 7,457,451 searches. Data last updated September 30, 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 Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Wed 1/27
2:46 pm-6:25 am
2 stops44h 39m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$580
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Sun 11/1
5:00 am-9:05 am
2 stops33h 05m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$592
Quickest round-trip
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Thu 3/25
5:40 pm-9:00 am
1 stop21h 20m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$611
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Thu 12/10
10:30 am-6:25 am
1 stop24h 55m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$679
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Thu 12/31
1:30 pm-9:00 am
1 stop24h 30m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$707
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Thu 12/31
1:59 pm-6:25 am
2 stops21h 26m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$722
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Sat 1/23
7:49 pm-6:20 am
1 stop39h 31m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$731
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Thu 12/31
8:02 am-6:25 am
2 stops27h 23m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$733
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Sun 10/18
7:29 pm-7:55 am
1 stop18h 26m
Sydney Kingsford Smith
Fri 10/30
10:55 am-11:09 pm
2 stops30h 14m
$1,193
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Sat 10/31
5:30 pm-1:15 pm
2 stops25h 45m
Sydney Kingsford Smith
Wed 11/4
9:25 pm-8:47 pm
1 stop18h 22m
$1,294
Showing 1-10 of 19 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 September.
| 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
More
How far ahead should I book a flight from Portland to Sydney?
Booking 74 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 $1,070). Flying from Portland to Sydney in December is currently the most expensive (average of $1,833). 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 $1,119 and $1,358 in November.The cheapest round-trip price found within the last 5 days was $1,092 on Air Canada (Nov 9-Nov 22).
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 50% 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.
Los Angeles (LAX) is the most affordable 1-stop option, with an average round-trip price of $1,301.
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 Los Angeles (LAX) have the shortest average one-way travel time for 1-stop routes: 20h 12m.
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 Los Angeles (LAX) offer the fastest connection on this route, with an average layover time of 3h 35m.
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 September 30, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andQantas Airways 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.
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Nov 2025
PDX - BNA
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.0
Overall
7.9
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 September 30, 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 September 30, 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 September 30, 2026.
Top 5 airlines flying from Portland to Sydney
Discover the top 5 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 7,457,451 searches. Data last updated September 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$222 | Average$1,160 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$901 | Average$1,300 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$960 | Average$1,168 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,076 | Average$1,210 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,159 | Average$1,376 | FlexibilityNo cancel fee | On-time69% |