$553 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 10/29. 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.
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1 adult, Economy

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Cheap Flights from Portland to Australia

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Sydney
Sydney2 stops$990
Melbourne
Melbourne2 stops$949
Brisbane
Brisbane1 stop$977
Perth
Perth2 stops$1,323
Adelaide
Adelaide2 stops$1,269
Coolangatta
Coolangatta2 stops$1,123
Canberra
Canberra2 stops$1,327
Sydney
Sydney2 stops$990
Melbourne
Melbourne2 stops$949
Brisbane
Brisbane1 stop$977
Perth
Perth2 stops$1,323
Adelaide
Adelaide2 stops$1,269
Coolangatta
Coolangatta2 stops$1,123
Canberra
Canberra2 stops$1,327

Book Cheap Portland to Australia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip 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 round-trip flight deals from Portland to Australia

Thu, Mar 5 - Sun, Mar 15
Multiple Airlines Logo
7:00 pm - 4:40 pmPDX-MEL
26h 40m2 stops
Multiple Airlines Logo
7:10 am - 6:30 pmMEL-PDX
29h 20m2 stops
$949Multiple Airlines
Find Deal
Wed, Nov 5 - Wed, Nov 19
Qantas Airways Logo
7:40 am - 3:35 pmPDX-MEL
36h 55m2 stops
Qantas Airways Logo
12:00 pm - 1:50 pmMEL-PDX
20h 50m1 stop
$970Qantas Airways
Find Deal
Thu, Mar 5 - Sat, Mar 14
United Airlines Logo
5:45 am - 9:30 amPDX-MEL
32h 45m2 stops
United Airlines Logo
10:30 am - 12:19 amMEL-PDX
31h 49m2 stops
$975United Airlines
Find Deal
Sat, Oct 18 - Sat, Nov 8
United Airlines Logo
7:35 pm - 6:30 amPDX-BNE
17h 55m1 stop
United Airlines Logo
11:40 am - 6:36 pmBNE-PDX
24h 56m1 stop
$977United Airlines
Find Deal
Fri, Mar 6 - Sun, Mar 15
Air Canada Logo
7:00 pm - 3:35 pmPDX-MEL
25h 35m2 stops
Air Canada Logo
7:10 am - 6:30 pmMEL-PDX
29h 20m2 stops
$984Air Canada
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Tue, Nov 4 - Thu, Nov 20
Alaska Airlines Logo
10:28 pm - 7:45 pmPDX-SYD
26h 17m2 stops
Alaska Airlines Logo
9:40 pm - 11:44 pmSYD-PDX
21h 04m2 stops
$990Alaska Airlines
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Tue, Nov 4 - Thu, Nov 20
Air Canada Logo
7:00 pm - 9:35 amPDX-SYD
19h 35m1 stop
Air Canada Logo
11:20 am - 9:15 amSYD-PDX
16h 55m1 stop
$1,000Air Canada
Find Deal
Tue, Nov 11 - Tue, Nov 18
Alaska Airlines Logo
8:45 pm - 7:45 pmPDX-SYD
28h 00m2 stops
Alaska Airlines Logo
9:40 pm - 6:17 amSYD-PDX
27h 37m2 stops
$1,006Alaska Airlines
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Fri, Mar 6 - Sun, Mar 15
Delta Logo
10:00 am - 8:00 amPDX-MEL
27h 00m1 stop
Delta Logo
9:10 am - 4:15 pmMEL-PDX
25h 05m1 stop
$1,022Delta
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Tue, Feb 24 - Sun, Jun 14
Delta Logo
7:45 pm - 8:00 amPDX-MEL
41h 15m2 stops
Delta Logo
10:00 am - 4:10 pmMEL-PDX
23h 10m1 stop
$1,026Delta
Find Deal
Booking Insights

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 September, when tickets cost $996 (return) on average. On the other hand, the most expensive months are December and January, when the average cost of round-trip tickets is $1,388 and $1,204 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 Saturday and avoid Thursdays if you are looking for the best rates. For your return to Portland, you’ll find the best rates on Thursdays and the most expensive ones on Tuesdays.

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, which saves you about 14% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonMay
Cheapest flight$517
Best time to beat the crowds but there is an average 8% 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 travelers 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 round-trip 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 round-trip flights cost $1,060 on average. Morning departures are around 5% cheaper than evening flights, on average. The most expensive time of day to fly to Australia is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,135.

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.

Reviews of the top 5 airlines serving 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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.0Entertainment
7.8Comfort
7.1Food
8.5Crew
8.1Boarding
Airline reviews

When I bought my tickets I up great my seats for extra $104 each seats 8A and 8B in the way back from Portland to Palm Springs they gave me the seats 15. I thought it was for round trip same seats . So I was very disappointed ☹️

6.0 GoodAnonymous, Sep 2025PDX - PSP
Read more Alaska Airlines reviews

When I bought my tickets I up great my seats for extra $104 each seats 8A and 8B in the way back from Portland to Palm Springs they gave me the seats 15. I thought it was for round trip same seats . So I was very disappointed ☹️

One disappointment. There was a gate change from B8 to B10, they had announced it maybe 20 minutes before the boarding time, possibly less. I didn’t hear the announcement as I was listening to music on my head phones at B8. At the boarding time, I got up and asked the gal at the B8 boarding desk, why the destination sign had not changed and if the flight was delayed as there was no plane behind her through the window, she said that perhaps the flight was delayed and the screen will probably update in -5 minutes ( she apparently didn’t know the boarding gate was changed ( 2 down from our location) I put my headphones on and went back to sit down . Just before the B10 door closed, I got a phone call asking me if I was still taking the flight, I said. “Yes” but I was at the gate stated on my ticket B8, then I was informed of the gate change, I got up and ran to the gate, and down the hallway to the jet ramp. I was the last to board!! Very frustrating . I was shocked that I got no emails or text messages from Alaska informing me of a last minute change!!

The crew was the best I’ve ever had HOWEVER when we arrived in Salt Lake City there were no Alaskan Airline employees to be found so we weren’t able to leave the plane until ANOTHER airline took pity on us. How could that possible happen?

The pilot performed the smoothest landing I’ve ever experienced. What a light touch. And I’m an avid traveler!

Didn't buy food and did not use entertainment as these were not the purpose of my flight.

Website could be better with faster access to specific flight information and boarding pass once reservation is made. Not a fan of no seat selection on line. I had to consult gate agent each time to change seats on flights with lots of open seats. This cannot possibly be cost effective for airline. On plus side, Alaska seat legroom seemed larger than American. ns

Staff inside Portland terminal were rude, made us fell rushed and not at all accommodating to seniors. For this alone I will probably never booked from them again.

It was fine—the seats are not very comfortable and the aisles are very narrow. Nothing different from other airlines

I booked a round trip. I ordered a lunch going and a lunch for the return but got both lunches going. Could have been my error. Both lunches were good.

Well the flight being delayed multiple time really was frustrating. But the crew and flight was good.

Gate agent rushed to fill hot jetway with crowd so it took over 12 minutes to go from gate to plane. Just like a discount airline Pooly prepared cabin and third time that claim of rough air prevented any cabin service. Friends on a Southwest flight at similar time had service.

Cramped seating for me. Luckily it wasn’t a long flight

Lounge in Lagos is terrible, food on board from Lagos to Atlanta was horrible. Only bright spot the cabin crew were awesome.

The airport was reasonably clean. The boarding process reasonably efficient. The cabin crew was efficient, polite but not that friendly. The food quality was unremarkable and the choices were awful . There was either a so so chicken dish or a “ vegetarian “ option which was really cheap carbohydrates drowned in cheese. Signing onto i flight wifi was not straightforward. Overall it was a very average experience

The staff and the boarding procedure were all amazing . The one flight was not equipped with WIFI which now adays seems odd. All in all the experience was good

Passengers need to check in big baggage instead of bringing on the plane. That cause inconvenience for everyone. Otherwise flight was good.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

A few more inches of legroom is all i ask

One of the best Qantas business flights I've had. Quality product

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

Airline running better than post Covid, proper boarding process now implemented, some aircraft feeling a bit old and tired, crew fine, online experience better.

Five hour flight instead of four hours due to westerly headwinds which wasn’t the fault of Qantas !

The wifi was out. Otherwise it was great flight. Richard, as CSM, was excellent.

Was bumped to a later flight because of inefficiency on part of the airline.

The Emerits/Qantas flight was cancelled to Wellington. We need a refund. Had to buy another airline ticket. How do we get the refund. Still not in Wellington.

Delayed QF59 flight once again, Qantas doesn't fail in maintaining there delayed departures and arrivals. USB points do not work nor do the power point sockets on the plane, Qantas staff admitted that on the flight. Don't expect to your charge devices. Saving grace, was the ice cream. Bottom line, if you expect to fly to HND and make it on time avoid Qantas and if you're interested in ice cream - visit 7/11.

Pretty excellent. I don’t know what the pilot could have done better with the bumping ( there was a storm) nor what happened to my ears coming down into bendigo. It doesn’t happen coming down into Sydney just the return flight. I wonder why?

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

Check in was quick and easy during early hours. Flight was on time, and customer services was a plus.

Terrible. They wouldn't allow me on my flight on the 14th..

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Tastless food and too obvious lack of enthusiasm for service in the economy vesus business class

Didn’t realize I purchased a basic fare with no carry ons allowed. Not very well communicated. Also had seats switched without knowledge and had to pay for different ones.

We loved our Air Canada experience and will definitely fly them again. It just so happened than in the first leg of our trip their entertainment system was not working, and neither was their oven so cold meal & snacks only.

For the price, it was a really good experience. There was no entertainment on board, so I couldn't really rate this, and I didn't order a meal. I appreciated that there was a free glass of wine.

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

My flight from New York to Canada and Canada to Brisbane was canceled, so I had to take united airlines instead flight from New York to Dubai then layover in Dubai 8 hours then from Dubai to Brisbane it was extremely difficult for me , it was a nightmare flying with Canadian airlines unfortunately.

I found the boarding easy and my seat was very comfortable as I had a lot of leg room. I am not too happy that I no longer have lounge access even though I used to get it with my TD credit card.

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Real smooth and easy, Real good leg room in coach!

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

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