Cheap flights from Portland to Australia from $842
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Australia departing on 1/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Fly from
Fly to
Route
Depart
Return
PortlandAdelaide
PDX Portland - ADL Adelaide
PDXADL
Portland
Mon 1/3
15:15-13:55
2 stops28h 10m
Adelaide
Mon 5/4
21:20-09:25
2 stops28h 35m
PortlandMelbourne
PDX Portland - MEL Melbourne
PDXMEL
Portland
Sun 28/2
15:15-13:35
2 stops27h 20m
Melbourne
Tue 9/3
08:00-14:40
2 stops25h 40m
PortlandAdelaide
PDX Portland - ADL Adelaide
PDXADL
Portland
Sat 20/3
15:15-21:00
2 stops36h 15m
Adelaide
Tue 30/3
19:00-14:40
2 stops37h 10m
PortlandMelbourne
PDX Portland - MEL Melbourne
PDXMEL
Portland
Wed 25/11
19:10-12:40
2 stops22h 30m
Melbourne
Wed 2/12
08:00-09:26
2 stops20h 26m
PortlandMelbourne
PDX Portland - MEL Melbourne
PDXMEL
Portland
Sat 31/10
19:15-14:55
2 stops25h 40m
Melbourne
Sat 7/11
06:05-09:26
2 stops22h 21m
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Sat 13/2
14:30-22:05
2 stops36h 35m
Sydney Kingsford Smith
Sun 21/2
06:00-23:54
2 stops36h 54m
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Tue 10/11
12:54-07:00
1 stop23h 06m
Sydney Kingsford Smith
Tue 17/11
09:15-12:13
1 stop21h 58m
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Mon 9/11
15:40-09:20
1 stop22h 40m
Sydney Kingsford Smith
Mon 23/11
11:50-14:34
1 stop21h 44m
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Thu 18/2
17:40-10:20
2 stops21h 40m
Sydney Kingsford Smith
Wed 3/3
21:25-20:48
1 stop18h 23m
PortlandSydney
PDX Portland - SYD Sydney Kingsford Smith
PDXSYD
Portland
Wed 4/11
18:04-09:00
1 stop19h 56m
Sydney Kingsford Smith
Thu 12/11
11:10-13:50
1 stop21h 40m
See travel insights to Australia from
How to get the cheapest flight ticket from Portland to Australia
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Australia?
In general, June is the cheapest month to fly from Portland to Australia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,517. If you don’t want to visit Australia in June, then you should wait until April to fly from Portland, when ticket prices are also cheap, with an average price of $1,603.
How far in advance should I book a flight from Portland to Australia?
You are more likely to see cheaper flights to Australia from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $1,792 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Portland for as low as $1,635 on momondo.
What is the cheapest airline that flies from Portland to Australia?
United Airlines, Delta, and Alaska Airlines are the most popular carriers operating from Portland to Australia
Which airlines fly to Australia?
United Airlines, Qantas Airways and Air Canada are the top three most popular airlines that fly to Australia from Portland according to our data. United Airlines is the first choice among our users, with 69% of people opting to fly with this airline when travelling to Australia. Keep in mind that there are 3 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.
Cheap Portland to Australia flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Portland to Australia
Frequently asked questions about flying from Portland to Australia
When did momondo last update prices for flights from Portland Airport to Australia?
Prices for flights from Portland Airport to Australia refresh daily.
How many operators does momondo search for flights from Portland Airport to Australia?
As of October 2026, there are 3 operators available to choose from for flights from Portland Airport to Australia.
How old do you have to be to fly from Portland Airport to Australia?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Australia.
What documentation or ID do you need to fly to Australia?
The travel and health documents required for your trip to Australia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Australia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Best airlines flying from Portland to Australia
Compare and see reviews for airlines that fly from Portland to Australia with momondo
| Airline | Rating | Free cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $734 | Free cancellation | Rating 7.4 10,350 reviews | |||
| PriceFrom $1,270 | Free cancellation | Rating 7.1 11,758 reviews | |||
| PriceFrom $1,273 | Free cancellation | Rating 7.5 1,109 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Portland to Australia?
Finding the right flight to Australia from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Australia quick and easy, saving you time and money.
Can I find flights from Portland to Australia with flexible booking policies on momondo?
Flights from Portland to Australia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Portland to Australia?
Once all potential Portland to Australia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Portland to Australia right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Portland to Australia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.