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Cheap flights from Seattle to Perth from $730

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PER
6 Jul — 13 Jul1
1 adult

Cheap flight deals from Seattle to Perth

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Perth (PER). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 1 July 2025.

Round-trip from

$1,697

One-way from

$730

Popular in

December

Cheapest in

February

Average price

$2,248
13/8-20/8
  • 13/8-20/8
  • 4 total stops
  • 73h 39m total
  • Seattle to Perth
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19/8
  • 19/8
  • 2 total stops
  • 44h 30m total
  • Seattle to Perth
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($496 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($93 potential savings vs. average return price).
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Average for round-trip flights in July 2025
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Find flight deals from Seattle to Perth

Cheapest flights from Seattle to Perth
Explore the most affordable flight options available from Seattle to Perth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2025.

Wed 13/817:15SEA - PER
2 stops39h 15mMultiple Airlines
Wed 20/815:30PER - SEA
2 stops34h 24mMultiple Airlines
Deal found 29/6$1,697
Thu 4/918:05SEA - PER
2 stops32h 00mQantas Airways
Tue 16/923:55PER - SEA
2 stops35h 29mQantas Airways
Deal found 29/6$1,772
Fri 5/910:15SEA - PER
1 stop27h 55mSingapore Airlines
Wed 17/906:25PER - SEA
1 stop41h 20mSingapore Airlines
Deal found 29/6$1,976
Thu 4/915:40SEA - PER
2 stops40h 00mCathay Pacific
Mon 15/900:10PER - SEA
2 stops33h 56mCathay Pacific
Deal found 29/6$2,120
Thu 14/809:50SEA - PER
2 stops37h 50mUnited Airlines
Thu 21/823:45PER - SEA
3 stops36h 09mUnited Airlines
Deal found 30/6$2,270

Cheapflights Fare Finder

Customise your flight search to find flights from Seattle to Perth that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 1 July 2025.
Use the filters below to find and compare flights from Seattle to Perth that are best for you.

Fly from

Seattle

Fly to

Perth

Route

Depart

Return

Price

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Wed 13/8

17:15-23:30

2 stops39h 15m

Perth

Wed 20/8

15:30-10:54

2 stops34h 24m

$1,697

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 4/9

18:05-17:05

2 stops32h 00m

Perth

Tue 16/9

23:55-20:24

2 stops35h 29m

$1,772

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Fri 5/9

10:15-05:10

1 stop27h 55m

Perth

Wed 17/9

06:25-08:45

1 stop41h 20m

$1,976

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 4/9

15:40-22:40

2 stops40h 00m

Perth

Mon 15/9

00:10-19:06

2 stops33h 56m

$2,120

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 14/8

09:50-14:40

2 stops37h 50m

Perth

Thu 21/8

23:45-20:54

3 stops36h 09m

$2,270

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 19/8

12:00-23:30

2 stops44h 30m

$730

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Sat 11/10

07:20-17:05

2 stops42h 45m

$842

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Tue 19/8

16:30-18:40

1 stop35h 10m

$1,108

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Fri 15/8

23:35-07:25

1 stop40h 50m

$1,296

SeattlePerth

SEA - PER

SEAPER

Seattle/Tacoma Intl

Thu 4/9

10:15-23:55

1 stop22h 40m

$1,519

Flights are sorted by cheapest return flights first.

Deals found on 29/6

Best time to book a flight from Seattle to Perth

Have a flexible travel schedule? Discover the best time to fly to Perth from Seattle with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

How far ahead should I book a flight from Seattle to Perth?

Use this chart to determine the optimal time to book a return flight from Seattle to Perth. Price data was last updated on 27 June 2025.

The best time to book flights from Seattle to Perth is 60 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Perth?

Currently, May is the cheapest month in which you can book a flight from Seattle to Perth (average of $286). Flying from Seattle to Perth in December is currently the most expensive (average of $409). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Perth

Get insights into the airlines that provide service to Perth. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Perth. Reviews last updated 1 July 2025.
Check out reviews from past customers who have flown with Singapore Airlines, Cathay Pacific, andQantas Airways from Seattle to Perth to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very Good
1,319 reviews
Check prices

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Singapore Airlines
8.1
Very Good
1,319 reviews
Singapore Airlines
8.1
Very Good
1,319 reviews
Check prices

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Cathay Pacific
7.6
Good
921 reviews
Singapore Airlines
8.1
Very Good
1,319 reviews
Check prices

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Qantas Airways
7.5
Good
869 reviews
Singapore Airlines
8.1
Very Good
1,319 reviews
Check prices

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
Qatar Airways
7.4
Good
3,596 reviews
Singapore Airlines
8.1
Very Good
1,319 reviews
Check prices

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.
United Airlines
7.4
Good
8,852 reviews
Singapore Airlines
8.1
Very Good
1,319 reviews
Check prices

Food

7.7

Crew

8.6

Entertainment

8.0

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Pierre,Apr 2025

MLE - SIN

3 boarding pass checkpoints at the gate. Long line before boarding. Poor leg room in economy.. Flight crew rounds practically non existent during flight.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Perth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Seattle to Perth round-trip?

    Our cheapest airline available from Seattle to Perth is Qantas Airways. Our recent data shows that you can find tickets from as low as $1,772 on this airline. Additional options worth looking into are Singapore Airlines and Cathay Pacific, starting at $1,976 and $2,120 round-trip. You may be able to fly from Seattle to Perth for 24% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Seattle to Perth one-way?

    $842 is the cheapest one-way deal found within the past few days, from Qantas Airways. You may also be able to find cheap deals on Qatar Airways and Philippine Airlines, with prices starting from $1,108 and $1,296, respectively.

  • Can I find deals for flights from Seattle to Perth that include hotel bookings?

    Yes. In addition to deals on Seattle to Perth flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Perth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Perth.

  • Can I find deals for business class flights from Seattle to Perth?

    Yes. Cheapflights offers flight deals from Seattle to Perth by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Perth?

    Currently, May is the cheapest month in which you can book a flight from Seattle to Perth (average of $286). Flying from Seattle to Perth in December is currently the most expensive (average of $409). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Mandurah
Scarborough
Fremantle
Rottnest Island

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Perth

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Perth flights
Spokane to Perth flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Seattle to Perth?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Seattle to Perth. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Perth?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Perth for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Perth with no change fees?

Certainly. Search results for flights to Perth from Seattle shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Seattle to Perth become cheaper?

Of course! You can now track prices for flights from Seattle to Perth and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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