SEA - PER

$487 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 9/15. 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

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
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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

Thu, Sep 11 - Thu, Sep 25
Qantas Airways Logo
4:59 pm - 5:05 pmSEA-PER
33h 06m2 stops
Qantas Airways Logo
10:30 am - 9:58 pmPER-SEA
26h 28m2 stops
$1,224Qantas Airways
Find Deal
Sun, Aug 31 - Sat, Sep 13
Qantas Airways Logo
5:05 pm - 5:05 pmSEA-PER
33h 00m2 stops
Qantas Airways Logo
4:25 pm - 9:58 pmPER-SEA
44h 33m2 stops
$1,264Qantas Airways
Find Deal
Thu, Sep 11 - Thu, Sep 25
Qatar Airways Logo
4:30 pm - 11:55 amSEA-PER
28h 25m1 stop
Qatar Airways Logo
10:45 pm - 12:45 pmPER-SEA
29h 00m1 stop
$1,267Qatar Airways
Find Deal
Fri, Sep 12 - Tue, Sep 23
Qatar Airways Logo
4:30 pm - 11:55 amSEA-PER
28h 25m1 stop
Qatar Airways Logo
10:45 pm - 12:45 pmPER-SEA
29h 00m1 stop
$1,304Qatar Airways
Find Deal
Sun, Aug 31 - Fri, Sep 12
Cathay Pacific Logo
7:45 am - 10:40 pmSEA-PER
47h 55m2 stops
Cathay Pacific Logo
12:10 am - 9:58 pmPER-SEA
36h 48m2 stops
$1,307Cathay Pacific
Find Deal
Sun, Aug 31 - Fri, Sep 12
Cathay Pacific Logo
5:59 pm - 10:40 pmSEA-PER
37h 41m2 stops
Cathay Pacific Logo
12:10 am - 9:58 pmPER-SEA
36h 48m2 stops
$1,315Cathay Pacific
Find Deal
Fri, Sep 12 - Tue, Sep 23
 Logo
4:59 pm - 12:05 pmSEA-PER
28h 06m2 stops
 Logo
11:55 pm - 3:18 pmPER-SEA
30h 23m2 stops
$1,438
Find Deal
Wed, Oct 8 - Thu, Oct 16
 Logo
1:30 am - 4:30 amSEA-PER
36h 00m3 stops
 Logo
11:35 pm - 8:45 amPER-SEA
24h 10m1 stop
$1,522
Find Deal
Thu, Sep 11 - Wed, Sep 24
Singapore Airlines Logo
10:15 am - 2:40 pmSEA-PER
37h 25m1 stop
Singapore Airlines Logo
1:10 am - 8:45 amPER-SEA
22h 35m1 stop
$1,691Singapore Airlines
Find Deal
Fri, Sep 12 - Mon, Sep 22
Singapore Airlines Logo
10:15 am - 5:10 amSEA-PER
27h 55m1 stop
Singapore Airlines Logo
1:10 am - 8:45 amPER-SEA
22h 35m1 stop
$1,732Singapore Airlines
Find Deal
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 $1,318 (return) on average. On the other hand, the most expensive months are January and December, where the average cost of round-trip tickets is $1,765 and $1,715 respectively.

Good to know

Low seasonFebruary
Cheapest flight$487
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 12% 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 $487 for a one-way ticket and $1,224 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 $1,479 and an overall rating of 8.1, 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 4 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.
8.1
Singapore AirlinesOverall score based on 1352 reviews
8.0Entertainment
8.6Crew
7.7Food
8.2Boarding
7.9Comfort
Airline reviews

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

4.0 OkayRobert, Aug 2025SIN - SYD
Read more Singapore Airlines reviews

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.

Good service and food. For buying items on flight should be preordered as they don’t keep much stock on board.

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

Construction at PDX resulting in very lung walk from the rental car to the gate. SFO, extremely long walk between terminals to get to connecting Singapore airlines flight. My smart watch recorded a total of 3 miles.

Crew and service was excellent, but passengers should be offered a welcome drink before take off which did not happen. Food was very good. Unfortunately the lie-flat bed in business class was one of the most uncomfortable I have experienced. The configuration forces you to sleep with your legs at an angle instead of in a straight line, plus there is very little padding on the bed so it wasn't possible to sleep for more than 2-3 hours on an 18 hour flight. For what the airlines charges for a business class ticket their hard product leaves a lot to be desired.

It was very good experience on board to Sydney with SQ.

Everything was great keep up the good work 😁, can't ask for more.

Flight from SFO did not include entertainment as it was not working the entire duration of the flight. Was informed that there would be a $350 voucher for the inconvenience. Uncertain how the voucher will be provided.

Check in was easy through self-check-in kiosks just like domestic flights. Staff onboard were fantastic. Some "book the cook" good options weren't great, others really good. Entertainment options a bit limited to what I've experienced on Qantas. Overall a good flight though, especially for the price.

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 travelling 3.5 years after. Agree Economy is no business class but the food was mediocre. Ordered a Hindu meal, the salads were bitter . The food was really below quality and had no tast from what I had in the past. Indian Railways probably have a better quality food when compared. However the kids meal was really nice and really appreciate how they were taken care of. The restrooms were dirty .

My flight was with American Airlines 120. The flight was delayed 3 hours and I missed my connection. When I arrived in Doha, the AA staff told me to call an 800 number to rebook a different flight, which was unacceptable. Eventually a Qatar Air staff member helped rebook me on a flight to Manila, that was 12 hours later. They offered me a hotel and meal voucher which I declined, because I didn’t want to leave the airport. Long story short, I spent 12 hours in the Doha airport waiting for my next flight.

Overall the experience was neat with crew being nice and caring especially to parent with kids. The free snacks option was okay. The kiosk at Philly airport didn’t work.

Reason for travelling Tampa to Orlando is to fly Qatar Airline. we end up with American Airline. This was the miserable experience I ever had in my entire travel history. Flight attendants were rude. They hit my knee with the food cart and I was holding ice pack for 2 hours. I still have the pain after a week. WE boarded the flight twice because of the temperature inside the plan.

First keep the airline as you promise. Reason for travelling from Orlando to Tampa is to go with Qatar Airline. We end up with American Airline. As expected the service was horrible.

Not sure how we end up with American Airlines instead of Qatar Airways. From Philadelphia to Qatar they boarded us then they asked us to unload. After 30 minutes later they board us again. The inside the plane it was burning hot and we were sweating like crazy. Crew members are absolute rude. The way they served the passengers were horrible. One of the crew members hit my knee with food cart and kept going. I was holding an ice pack for almost 2 hours. I am still with the pain.

I felt that when I was rerouted it should have been to business class.

The flight was smooth Thank God but the delays and changing gates for 3-4 times made me so tired of walking back and forth with heavy bags I thought I was going to pass out with heavy headaches but Thank God finally found the final gate and home safe. These delays happen anytime for important reasons so just be patient when you come across these situations.

This trip was the most comfortable one I have ever experienced, the team was excellent and very helpful. I am so glad I picked Qatar Airways.

All the crew members were too slow and rude. Most of the times the registers were empty, while hundreds of customers were waiting in line, and it was impossible to get a supervisor. Despite being in line on time, I missed my freight, plus a some customers who were ahead and behind me.

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.

Like the service. Very hard to communicate or contact when have problems

Very bad, flight was cancelled due to strike and staff was unable to rebook us

They rescheduled me and I had no issues with the new flight

Air Canada is my new fave airline..I plan to use when I can. No complaints at all just rave compliments for the staff and airline.

Strike pissed me n stranded in middle of no where

Check in staff was incredibly rude and condescending. When I arrived at the gate I had been charged $125 for a checked back. I did have or check a bag. When I brought this to the attention of the staff member who checked me in, she said that she made a mistake and there was nothing she could do about it. I asked her to remove the charge and refund credit card, she said she could not and that I had to call my credit card company to contest the charge. I called Air Canada customer support, was put on hold, after 43 minutes a received a messages stating customer service was overwhelmed with calls and was then hung up on.

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

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