The cheapest times to fly from SEA to PER are

  • January 29th to March 25th
  • April 16th to May 13th
  • August 27th to December 2nd

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from SEA to PER is late October. Prices can be as high as $2226 for Friday flights during mid December, or as low as $1147 for Tuesday flights around late October.


When to Fly to Perth

Flying from Seattle, WA (SEA) to Perth (PER) will usually cost between $1149 to $1787 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late October with an average ticket price of $1170. Due to high demand the most expensive time to fly is mid December, with an average price of $2013. Planning your trip to low-cost times can easily save you $843 on economy flights and even more on first-class flights. Generally, any price below $1362 can be considered a good price for a round-trip SEA to PER flight.

See below for a graph of average weekly prices for the SEA to PER route. All prices are for round-trip tickets in USD.

SEA to PER Flight Prices

Compared to other flights, the SEA to PER flight is slightly more expensive than the average and costs slightly more than the average flight leaving from Seattle. The average price per mile (for a direct flight) is $0.09, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Fridays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $298 (19%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1263. Return trip prices are from the PER to SEA flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from SEA to PER can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 17 hour 37 minutes may not be realistic.


Flight Hacking SEA to PER

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from SEA to PER — but Champion Traveler does!

Hack #1: Kuala Lumpur (SEA > KUL > PER)

  • Price for both tickets: $1023
  • Average savings: $339 (24.86%)

See SEA to KUL flights

Hack #2: Denpasar (SEA > DPS > PER)

  • Price for both tickets: $1045
  • Average savings: $317 (23.25%)

See SEA to DPS flights

Hack #3: Jakarta (SEA > CGK > PER)

  • Price for both tickets: $1052
  • Average savings: $310 (22.77%)

See SEA to CGK flights


Flight Questions Answered

Still have questions about flying from SEA to PER? We’ve got answers.

Which airlines fly this route?

You can find 25 major airlines flying this route most often: Air Canada, Air New Zealand, Alaska, American, ANA, Asiana, Austrian, Cathay Pacific, China Eastern, China Southern, Delta, Emirates, Etihad, EVA Air, Fiji Airways, Garuda Indonesia, Hawaiian, JAL, Qantas, Qatar Airways, Singapore Airlines, THAI, United, Virgin Atlantic, Virgin Australia, and potentially more during busy seasons.

How far away is it from Perth International Airport to Seattle/Tacoma International Airport?

The distance between the two airports is roughly 9239 miles or 14869 kilometers.

How long does it take to fly from SEA to PER?

The real-world flight time for a nonstop SEA to PER flight is about 17 hour 37 minutes.

How many flights go between Seattle, WA and Perth?

It depends on the day of the week and the date, but a typical day might have around 81 available flights from SEA to PER.


Airport Location Info


Departing Airport

Origination code SEA
Origination airport name Seattle/Tacoma International Airport
City Seattle, WA
Country the United States
Latitude 47.5
Longitude -122.3

Return Airport

Destination code PER
Destination airport name Perth International Airport
City Perth
Country Australia
Latitude -31.9
Longitude 116


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.