SEA - PER

$460 Find Cheap Flights from Seattle to Perth

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Perth departing on 3/4. 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 Perth

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Perth, 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 Seattle to Perth, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$971
Overall average: $1,373
Cathay Pacific
Mon 8/17Sun 9/13
SEA - PER • 1 stop
Cheapest one-way
$460
Typical prices: $542-$696
Philippine Airlines
Wed 3/4
SEA - PER • 1 stop
Top airlines
Cathay Pacific
Cheapest • from $971 (round-trip)
Singapore Airlines
Best reviews • 8.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Perth. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Hong Kong (HKG)
Cheapest • Avg $1,230 (round-trip)
Singapore (SIN)
Shortest trip • 25h 53m (one-way)
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 14% 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 100s of sites at once to find you the best travel deals.
We hope you love your trip to Perth!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Perth (SEA-PER)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Perth 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 Seattle to Perth

Mon, Aug 17 - Sun, Sep 13
Cathay Pacific Logo
12:25 pm - 10:40 pm
SEA
-
PER
43h 15m
1 stop
Cathay Pacific Logo
12:10 am - 10:20 am
PER
-
SEA
25h 10m
1 stop
$971Cathay Pacific
Tue, Apr 7 - Mon, Apr 27
Cathay Pacific Logo
11:45 am - 10:40 pm
SEA
-
PER
43h 55m
1 stop
Cathay Pacific Logo
12:10 am - 10:05 am
PER
-
SEA
24h 55m
1 stop
$975Cathay Pacific
Mon, Aug 17 - Sun, Sep 13
Cathay Pacific Logo
12:25 pm - 10:40 pm
SEA
-
PER
43h 15m
1 stop
Cathay Pacific Logo
12:10 am - 10:20 am
PER
-
SEA
25h 10m
1 stop
$977Cathay Pacific
Tue, Apr 7 - Mon, Apr 27
Cathay Pacific Logo
11:45 am - 6:50 am
SEA
-
PER
28h 05m
1 stop
Cathay Pacific Logo
12:10 am - 10:05 am
PER
-
SEA
24h 55m
1 stop
$981Cathay Pacific
Mon, Aug 17 - Sun, Sep 13
Cathay Pacific Logo
12:25 pm - 10:40 pm
SEA
-
PER
43h 15m
1 stop
Cathay Pacific Logo
12:10 am - 10:20 am
PER
-
SEA
25h 10m
1 stop
$982Cathay Pacific
Mon, Apr 6 - Mon, Apr 13
Cathay Pacific Logo
11:45 am - 6:50 am
SEA
-
PER
28h 05m
1 stop
Cathay Pacific Logo
8:20 am - 10:05 am
PER
-
SEA
40h 45m
1 stop
$1,060Cathay Pacific
Mon, Aug 17 - Sun, Sep 13
Cathay Pacific Logo
12:25 pm - 10:40 pm
SEA
-
PER
43h 15m
1 stop
Cathay Pacific Logo
12:10 am - 7:05 pm
PER
-
SEA
33h 55m
2 stops
$1,064Cathay Pacific
Tue, Apr 7 - Mon, Apr 27
Cathay Pacific Logo
8:41 am - 6:50 am
SEA
-
PER
31h 09m
2 stops
Cathay Pacific Logo
12:10 am - 10:05 am
PER
-
SEA
24h 55m
1 stop
$1,068Cathay Pacific
Mon, Aug 17 - Sun, Sep 13
Cathay Pacific Logo
12:25 pm - 10:40 pm
SEA
-
PER
43h 15m
1 stop
Cathay Pacific Logo
12:10 am - 7:05 pm
PER
-
SEA
33h 55m
2 stops
$1,070Cathay Pacific
Mon, Aug 17 - Sun, Sep 13
Cathay Pacific Logo
12:25 pm - 10:40 pm
SEA
-
PER
43h 15m
1 stop
Cathay Pacific Logo
12:10 am - 7:05 pm
PER
-
SEA
33h 55m
2 stops
$1,071Cathay Pacific
Booking Insights

KAYAK's insights & trends for Seattle to Perth flights

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

What is the cheapest month to fly from Seattle to Perth?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Perth, 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 Seattle to Perth is February, where tickets cost $1,292 (return) on average. On the other hand, the most expensive months are November and December, where the average cost of round-trip tickets is $1,739 and $1,718 respectively.

Good to know

Low seasonJanuary
Cheapest flight$460
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly with an average 14% increase in price.
Flight from Seattle to Perth

When to book flights from Seattle to Perth

Are your dates flexible? Find out the best times to travel from Seattle to Perth based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 Seattle to Perth

  • What is the cheapest flight from Seattle to Perth?

    In the last 3 days, the lowest price for a flight from Seattle to Perth was $460 for a one-way ticket and $971 for a round-trip.

  • Do I need a passport to fly between Seattle and Perth?

    Yes, you’ll need a passport to travel to Perth from Seattle.

  • Which aircraft models fly most regularly from Seattle to Perth?

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

  • Which airline alliances offer flights from Seattle to Perth?

    oneworld, and Star Alliance are the airline alliances operating flights between Seattle and Perth, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Seattle to Perth, Singapore Airlines or Qantas Airways?

    The two airlines most popular with KAYAK users for flights from Seattle to Perth are Singapore Airlines and Qantas Airways. With an average price for the route of $1,510 and an overall rating of 8.2, Singapore Airlines is the most popular choice. Qantas Airways is also a great choice for the route, with an average price of $1,451 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from Seattle to Perth?

    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 Seattle to Perth.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Perth from Seattle 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 Seattle to Perth?

    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 to Perth with an airline and back to Seattle with another airline. Booking your flights between Seattle and PER can sometimes prove cheaper using this method.

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

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

Reviews of the top 3 airlines serving from Seattle to Perth

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Perth. 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 Seattle to Perth? 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.
8.2
Singapore AirlinesOverall score based on 1463 reviews
7.8Food
8.0Entertainment
8.0Comfort
8.3Boarding
8.6Crew
Airline reviews

I felt that the whole experience went very smoothly. The aircraft was extremely clean and tidy on boarding. The cabin crew were beautifully turned out very, very efficient and were a credit to Singapore Airlines who are now my favourite carrier.

10.0 ExcellentAnonymous, Feb 2026
AKL - SIN
Read more Singapore Airlines reviews

I felt that the whole experience went very smoothly. The aircraft was extremely clean and tidy on boarding. The cabin crew were beautifully turned out very, very efficient and were a credit to Singapore Airlines who are now my favourite carrier.

I find it was a bit hot before take off. If there is a way to improve the airflow it would be great

I wish there was a little more leg room between the seats. The recline was good and seats overall were comfortable. I also didn’t like the 2-4-2 configuration.

toilets could be cleaned more frequently, everything else was pretty good.

The flight crew was phenominal! We couldn't have asked for any better. They were experienced professionals.

The consistency with Singapore Airlines is fantastic. Crew are always brilliant and food delicious in business class

Wish the underseat compartment don’t have a restriction, can fit a personal item such as backpack fully like most Boeing

The business class seats were very uncomfortable. When in lie flat position my legs were very restricted.

Crew and service excellent. 2 hour delay for takeoff. SQ app showed flight on time.

Very good flight from Boarding to landing -efficient and comfortable with decent entertainment options

Qantas is always subpar beyond comfy chairs for a domestic flight

I liked boarding the plane. The staff were rude, the food was appalling and the chairs the most uncomfortable I have ever experienced

an hour late, then had to disembark on back stairs and take 4 flights up to get to main airport. No warning, and difficulty for those with canes and poor knees.

Well my expórtenle with Qantas it wasn’t that good KLM from Bs Aires was delay Santiago Chile Qantas QF 028 was still in the airport but the crew didn’t opened the door for me soo I lost my fly And I stuck in the airport 13 hrs waiting for next fly by Latam Arline My question is can I have my money back for business class

It was ok, the additional baggage charges were a bit excessive given winter is a time for skiing. To have to pay $600 extra for skis was tantamount to robbery. Airlines should consider sporting goods as baggage. Likewise, they should consider increasing the number of bags allowed on international flights to known ski destinations.

Flight was canceled. I was not alerted. It was only kayak that alerted me

Flight was 2.5 hours late leaving. We spent 50 minutes of that sitting on the plane with no explanation. They did reduce the time in the air so we arrived a little less late which was something. The cheese and crackers were okay but the wine was terrible.

Couldn't access entertainment on app as said in an email

Excellent as always, I won't fly to Australia, and back to the US on any other airline. The flight crew is always top notch, and have a way to make one feel extra special. Thank you for your service, I would rate Qantas Airways a 10+.

After already paying for excess luggage prior to flight, i was advised AT check in that i had to pay $816 or forfeit my flight! The lady at the counter was SO rude and had already started offboarding me when i said i would pay it after asking her three times for the exact amount! Have lodged a formal complaint yet heard nothing. Will not ever travel via Qantas again

Extremely uncomfortable seats with very little cushioning, unable to recline enough to sleep comfortably on this 13 hour overnight flight. My body was in pain by the end.

When we checked in at the Siem Reap Airport in Cambodia, we were only given three boarding passes and told that we would have to check in with American when we arrived in Boston. This was a source of stress for us. After we landed in Boston, we had a long passage from Terminal E to Terminal B (American Airline ticketing counter). Because the electronic ticketing kiosks for check-in would not recognize our Confirmation Code, we had to wait for an hour in a long line where only two AA reps were taking care of Special Services passengers. In many years of both business and recreational travel, I have never had this experience. I would expect more from AA being in partnership with other airlines to do a better job with this.

Our experience on the Doha to Hyderabad segment was extremely stressful due to prolonged delays and a lack of clear communication from the airline. We were traveling as a family, including children, and the uncertainty around timing and next steps caused significant distress. There was very little proactive information provided during the delay, and we were not given clear written explanations about what was happening or how long it might take. This made it difficult to manage the situation, especially while caring for children in a transit environment. In addition, one member of our party was ultimately unable to continue travel, which added to the emotional strain and disruption of the trip. Overall, the experience highlighted gaps in communication, customer care, and handling of unexpected situations. We are sharing this feedback so that future passengers, especially families, are supported with clearer communication and better assistance during irregular operations.

The seat cushions are absolutely lacking, not sure if they know the passengers are traveling for 14 hours straight, but the padding made our back and butt ache like crazy. The entertainment console had its own problems, either the headphone jack wasn't working or the power outlet via usb or ac outlet was not working. Not to mention the seat handles were not adjustable in some planes in the middle or on the aisle. Qatar/Indigo may be operating a very old fleet of planes to make as much profit as possible, but passengers may not be following them for long, should this treatment of its customers continue. Qatar/Indigo, wake up and do it right by your customers, or they may not be your customers anymore.

It would help id flight crew were not rude and showed some courtesy. They were shouting at passengers and yelling instructions as if we were school children at lunch cafeteria!!

All good. Over four hours flight if provided snacks like Qatar Airways would be better

Lobster starter in business class was not good, tough, served cold, and without butter. Movie selection was missing latest releases, did not offer older classic, high quality movies

Crew and food was good, ok leg room if you don’t have a big box under the seat. And the seats are so narrow (I’m only 70kg), will consider an alternate airline next time

Food was absolutely pathetic. I wasted so much food which I thought was inedible. I also loathe the inflight entertainment system which has very little content

Boarding from DOH to SYD the Business Class were pointed in a separate gate but no one there to receive us. Otherwise it was ok.

Everything you need to know for your flight from Seattle to Perth

Information on your arrival and departure airports