PDX - SYD

$658 Find Cheap Flights from Portland to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Sydney departing on 28/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Sydney, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Sydney, as well as popular online travel agencies
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Everything you should know

Cheapest return fare
$1,372
Typical prices: $1,439-$1,892
Multiple Airlines
Mon 23/2Fri 6/3
PDX - SYD • 1 stop
Cheapest one-way flight
$658
Typical prices: $815-$962
Multiple Airlines
Sat 28/3
PDX - SYD • 2 stops
Top airlines
Qantas Airways
Cheapest • from $1,412 (return)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 25% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
June
Cheapest • 15% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Sydney!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portland to Sydney (PDX-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Portland to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Portland to Sydney

Mon, 23 Feb - Fri, 6 Mar
Multiple Airlines Logo
19:16 - 07:25
PDX
-
SYD
41h 09m
1 stop
Multiple Airlines Logo
14:00 - 10:56
SYD
-
PDX
39h 56m
2 stops
$1,372Multiple Airlines
Mon, 23 Feb - Thu, 5 Mar
Multiple Airlines Logo
19:16 - 07:25
PDX
-
SYD
41h 09m
1 stop
Multiple Airlines Logo
14:00 - 11:52
SYD
-
PDX
40h 52m
2 stops
$1,388Multiple Airlines
Mon, 23 Feb - Sat, 7 Mar
Multiple Airlines Logo
19:16 - 07:25
PDX
-
SYD
41h 09m
1 stop
Multiple Airlines Logo
14:00 - 10:52
SYD
-
PDX
39h 52m
2 stops
$1,404Multiple Airlines
Mon, 23 Feb - Mon, 2 Mar
Qantas Airways Logo
17:39 - 09:10
PDX
-
SYD
44h 31m
2 stops
Qantas Airways Logo
11:20 - 17:13
SYD
-
PDX
24h 53m
1 stop
$1,412Qantas Airways
Thu, 26 Feb - Tue, 10 Mar
Qantas Airways Logo
06:25 - 07:25
PDX
-
SYD
30h 00m
1 stop
Qantas Airways Logo
19:15 - 22:02
SYD
-
PDX
44h 47m
2 stops
$1,415Qantas Airways
Sun, 22 Feb - Sun, 8 Mar
Multiple Airlines Logo
21:30 - 07:25
PDX
-
SYD
38h 55m
1 stop
Multiple Airlines Logo
14:00 - 10:52
SYD
-
PDX
39h 52m
2 stops
$1,419Multiple Airlines
Mon, 23 Feb - Mon, 2 Mar
Multiple Airlines Logo
14:30 - 12:35
PDX
-
SYD
27h 05m
2 stops
Multiple Airlines Logo
06:00 - 20:53
SYD
-
PDX
33h 53m
2 stops
$1,421Multiple Airlines
Thu, 26 Feb - Tue, 10 Mar
Qantas Airways Logo
06:25 - 13:55
PDX
-
SYD
36h 30m
2 stops
Qantas Airways Logo
21:25 - 20:34
SYD
-
PDX
17h 09m
1 stop
$1,432Qantas Airways
Tue, 5 May - Tue, 12 May
Qantas Airways Logo
14:50 - 06:25
PDX
-
SYD
22h 35m
1 stop
Qantas Airways Logo
06:25 - 13:26
SYD
-
PDX
24h 01m
2 stops
$1,435Qantas Airways
Mon, 23 Feb - Wed, 4 Mar
Multiple Airlines Logo
19:16 - 07:25
PDX
-
SYD
41h 09m
1 stop
Multiple Airlines Logo
14:00 - 16:50
SYD
-
PDX
21h 50m
2 stops
$1,436Multiple Airlines
Booking Insights

KAYAK's insights & trends for Portland to Sydney flights

Get data-powered insights and trends into flights from Portland to Sydney to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from Portland to Sydney?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Portland to Sydney departing in February.

What is the cheapest month to fly from Portland to Sydney?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Sydney, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Portland to Sydney is June, where tickets cost $1,426 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $2,543 and $1,868 respectively.

How far in advance should I book a flight from Portland to Sydney?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Portland to Sydney, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Portland to Sydney, you should book around 3 weeks before departure, which saves you about 25% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Find deals

Good to know

Low seasonJune
Cheapest flight$658
Best time to beat the crowds (16% less expensive on average)
Most popular time to fly (51% more expensive on average)
Flight from Portland to Sydney

When to book flights from Portland to Sydney

Are your dates flexible? Find out the best times to travel from Portland to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to Sydney

  • Do I need a visa to fly from Portland International Airport (PDX) to Sydney Airport (SYD)?

    If you are an American citizen that is flying from Portland International Airport (PDX) to Sydney Airport (SYD), you need to have a valid passport and a visa to enter Australia. The visa is referred to as an Electronic Travel Authority (ETA) and it allows most travelers to stay in the country for up to 90 days.

  • What transportation options are there for going from Sydney Airport (SYD) to downtown Sydney?

    The easiest way to go from Sydney Airport (SYD) to downtown Sydney is by driving. With normal traffic, this will take you around 15 to 20 minutes in total. You can either rent your own car from the airport, grab a local taxi from outside of the Arrivals terminal, or use a ridesharing service.

  • What airline lounges are available at Portland International Airport (PDX)?

    Portland International Airport (PDX) has quite a few lounges for travelers to choose from. You can find the Alaska Airlines Alaska Lounge in Concourse B, as well as in Concourse C. The Delta Air Lines Delta Sky Club is in Concourse D, while the United Airlines United Club is in Concourse E.

  • What is the checked luggage policy for flights from Portland International Airport (PDX) to Sydney Airport (SYD)?

    When you fly Economy from Portland International Airport (PDX) to Sydney Airport (SYD), you will generally be able to check one bag for free. Air Canada has a policy that your suitcase or item cannot weigh more than a maximum of 70 lbs.

  • What is the cheapest flight from Portland to Sydney?

    In the last 3 days, the lowest price for a flight from Portland to Sydney was $658 for a one-way ticket and $1,372 for a return.

  • Which airports will I be using when flying from Portland to Sydney?

    Portland and Sydney are both served by 1 main airport. You will leave Portland from Portland and will be arriving at Sydney Kingsford Smith.

  • Which aircraft models fly most regularly from Portland to Sydney?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Portland to Sydney?

    Star Alliance is the only airline alliance operating flights between Portland and Sydney.

  • How does KAYAK find such low prices on flights from Portland to Sydney?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Sydney.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Sydney?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Sydney?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Sydney with an airline and back to Portland with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Sydney?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Portland to Sydney

  • Travelers have a few different ways how they can go from downtown Portland to Portland International Airport (PDX). When going by car, the trip generally lasts between 10 and 15 minutes. When taking public transportation, like bus line 12 and the MAX Red Line Shuttle, you will arrive in approximately 1 hour.
  • Direct flights from Portland International Airport (PDX) to Sydney Airport (SYD) are not offered, so you will need to have at least one layover. If you are flying with Qantas Airways, you will likely have a layover in Los Angeles. If you are flying with Air Canada, you may have layovers in Vancouver and Brisbane.
  • Those that value sustainability may want to fly from Portland International Airport (PDX) to Sydney Airport (SYD) with Qantas Airways. Qantas Airways prioritizes the environment and has pledged to reduce its carbon emissions by 25% by 2030 and achieve net zero emissions by 2050. It also has been working to remove single-use plastics from its supply chain.
  • Flying from Portland International Airport (PDX) to Sydney Airport (SYD) is quite a long journey, so it may be worth it to upgrade to Premium Economy or Business Class for your comfort. After you have booked an Economy ticket, many airlines will give you the option of upgrading at a discounted rate.
  • To save some money during your trip from Portland International Airport (PDX) to Sydney Airport (SYD), book a Basic Economy ticket. Both Air Canada and United Airlines offer Basic Economy fares, while Fiji Airways has a Saver fare.

Reviews of the top airline flying from Portland to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Portland to Sydney. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Sydney? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9215 reviews
7.3Comfort
7.1Entertainment
7.7Boarding
8.1Crew
6.6Food
Airline reviews

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

8.0 ExcellentAnonymous, Jan 2026
ORD - TPA
Read more United Airlines reviews

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

The food was terrible this time. Otherwise pleasant, quiet, on-time.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

I wish there were outlets to charge my iPhone. The crew was great; we had a female pilot who was great with explaining what was happening and delays,

Everything you need to know for your flight from Portland to Sydney

Information on your arrival and departure airports

Portland (PDX)
Sydney (SYD)