$606 Find Cheap Flights from Portland to Australia

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 Australia departing on 18/8. 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

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Best Australia Flight Deals from Portland

Cheapest return prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney1 stop$1,193
Brisbane
Brisbane1 stop$1,383
Perth
Perth2 stops$2,148
Sydney
Sydney1 stop$1,193
Brisbane
Brisbane1 stop$1,383
Perth
Perth2 stops$2,148

Cheap Flights from Portland to Australia

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Portland to Australia 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 Australia

Wed, 20 Aug - Wed, 1 Oct
Air Canada Logo
19:40 - 07:20PDX-SYD
18h 40m1 stop
Air Canada Logo
09:20 - 09:21SYD-PDX
17h 01m1 stop
$1,193Air Canada
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Sat, 9 Aug - Sat, 23 Aug
Qantas Airways Logo
14:56 - 07:05PDX-SYD
23h 09m1 stop
Qantas Airways Logo
17:45 - 21:15SYD-PDX
20h 30m1 stop
$1,217Qantas Airways
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Sun, 14 Sep - Sun, 28 Sep
Logo
19:40 - 11:35PDX-MEL
22h 55m2 stops
Logo
06:00 - 09:21MEL-PDX
20h 21m2 stops
$1,279
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Thu, 28 Aug - Thu, 11 Sep
American Airlines Logo
14:56 - 07:30PDX-SYD
23h 34m1 stop
American Airlines Logo
17:45 - 23:11SYD-PDX
22h 26m2 stops
$1,290American Airlines
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Tue, 16 Sep - Tue, 18 Nov
American Airlines Logo
08:30 - 07:05PDX-SYD
29h 35m1 stop
American Airlines Logo
11:15 - 16:31SYD-PDX
24h 16m2 stops
$1,297American Airlines
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Sat, 9 Aug - Sat, 30 Aug
Delta Logo
12:35 - 06:35PDX-SYD
25h 00m1 stop
Delta Logo
09:25 - 15:59SYD-PDX
23h 34m1 stop
$1,305Delta
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Mon, 25 Aug - Sun, 14 Sep
Delta Logo
16:55 - 06:35PDX-SYD
20h 40m1 stop
Delta Logo
09:25 - 11:52SYD-PDX
19h 27m1 stop
$1,306Delta
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Thu, 28 Aug - Fri, 12 Sep
United Airlines Logo
13:01 - 07:00PDX-SYD
24h 59m2 stops
United Airlines Logo
09:30 - 15:05SYD-PDX
22h 35m2 stops
$1,313United Airlines
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Sat, 5 Jul - Thu, 24 Jul
United Airlines Logo
13:35 - 06:55PDX-SYD
24h 20m1 stop
United Airlines Logo
10:20 - 12:32SYD-PDX
19h 12m1 stop
$1,488United Airlines
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Tue, 12 Aug - Sun, 17 Aug
Logo
17:35 - 14:40PDX-SYD
28h 05m1 stop
Logo
16:20 - 16:20SYD-PDX
17h 00m1 stop
$1,507
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KAYAK's insights & trends for Portland to Australia flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Australia, 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 Australia is May, when tickets cost $1,595 (return) on average. On the other hand, the most expensive months are December and January, when the average cost of return tickets is $2,313 and $2,135 respectively.

What’s the cheapest day of the week to fly from Portland to Australia?

The average price of all round-trip flights from Portland to Australia clicked on KAYAK for each day over the last 12 months.

When flying from Portland to Australia, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Portland, you’ll find the best rates on Tuesdays and the most expensive ones on Saturdays.

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

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 Australia, 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 Australia, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

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Good to know

Low seasonMay
High seasonFebruary
Cheapest flight$606
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly and prices are also 12% lower on average.
Flight from Portland to Sydney

FAQs - booking Australia flights

  • What are some of the transportation choices to get from the Sydney International Airport to the downtown Sydney area?

    One of the most convenient and cost-effective choices for making this trip is to travel on the Line T8 train offered by Sydney Trains that makes the trip from the airport in about 11 minutes. Taxis that make the trip from the airport can do so in about 15 minutes.

  • What are some transportation options to get from the Perth International Airport to downtown Perth?

    There is a light rail service offered by Transperth and their Airport Line that makes the trip from the airport in about 19 minutes. This company also offers their Line 380 bus that makes the trip in about 32 minutes. Traveling in a taxi from the airport to the downtown area should take about 17 minutes.

  • What are the visa and passport requirements when flying from Portland to Australia?

    There is a requirement to obtain a visa or an electronic travel authority before you fly to Australia. If you are traveling to Australia as a tourist and you do not plan on staying for more than 90 days, it is quite easy to obtain an electronic travel authority through the ETA website before your trip. Travelers also need to have a valid passport upon their entry into Australia.

  • Does the Sydney International Airport offer services or amenities to help me get freshened up after a long flight from Portland?

    Travelers will find that this airport offers free showers in Terminal One near Gates 31, 51, and 24. You can also find showers in the check-in area near Counters A and K on the departures level.

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

    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 Australia.

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

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

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

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

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

    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 from Portland to Australia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Australia?

    The cheapest time of day to fly to Australia is generally in the morning, when retur flights cost $908 on average. Morning departures are around 23% cheaper than evening flights, on average. The most expensive time of day to fly to Australia is generally in the evening, which is peak travel time and where the average cost of a ticket is $1,178.

Top tips for finding cheap flights to Australia

  • Travelers who plan on making a trip from the Portland International Airport (PDX) to Australia often make the choice to fly to the Sydney International Airport (SYD). When looking for flights on this route, some of the best options include one-stop flights aboard Air Canada, United Airlines, Delta Airlines, and Qantas Airways.
  • A popular destinations on the west coast of Australia is the city of Perth and the Perth International Airport (PER). Popular flight choices to this airport from Portland International Airport include two-stop flights offered by Air Canada.
  • Travelers that want to find a way to get to the Portland International Airport without having to take their own car should select the Central Oregon Breeze bus that makes the trip from Union Station in downtown Portland to the airport in about 30 minutes.
  • When moms who are nursing are planning a trip through the Portland International Airport, they are happy to find that this airport offers a nursing room that sits on the Concourse Level adjacent to Gates 5 and 6. This nursing room offers adjustable lighting, a chair, a very deep sink, as well as electrical outlets and a locking door.
  • If you are driving your own car to the Portland International Airport, one of the most convenient options for parking is their Valet Parking that lets you drop your car off adjacent to the ticket counter and then your car will be waiting for you at the curb upon your arrival back in Portland. For longer trips such as those to Australia, a more economical option is to choose the Economy Lot which offers the lowest daily parking rate, has free shuttle service to the terminal building, and also offers free flat tire assistance and jump starts should you need it.

Top airline flying from Portland to Australia

 
Need help choosing which airline to fly with from Portland to Australia? 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 8790 reviews
6.6Food
7.7Boarding
8.1Crew
7.0Entertainment
7.3Comfort
Airline reviews

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

2.0 MediocreAnonymous, June 2025LAX - SEA
Read more United Airlines reviews

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Terrible. Out flight was delayed for 21 (twenty one) hours. United is a joke.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

The food was the worst I’ve had on any flight I’ve ever been on.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

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

Information on your arrival and departure airports

Portland (PDX)

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