CA $988 Cheap Flights from Seattle (SEA) to Adelaide (ADL)

View CA $988 flight on Tue, May 12, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Adelaide, SA Airport (ADL)

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Cheap flights from Seattle (SEA) to Adelaide (ADL)

Prices were available within the past 7 days and start at CA $988 for one-way flights and CA $1,780 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, Aug 26 - Mon, Sep 7
SEA
Seattle
ADL
Adelaide
CA $1,780 Roundtrip, found 1 day ago
CA $1,780
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Aug 26 from Seattle to Adelaide, returning Mon, Sep 7, priced at CA $1,780 found 1 day ago
Alaska Airlines
Tue, Aug 25 - Sat, Sep 5
SEA
Seattle
ADL
Adelaide
CA $1,786 Roundtrip, found 1 day ago
CA $1,786
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Aug 25 from Seattle to Adelaide, returning Sat, Sep 5, priced at CA $1,786 found 1 day ago
Alaska Airlines
Wed, Aug 26 - Mon, Sep 7
SEA
Seattle
ADL
Adelaide
CA $1,794 Roundtrip, found 1 day ago
CA $1,794
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Aug 26 from Seattle to Adelaide, returning Mon, Sep 7, priced at CA $1,794 found 1 day ago
Alaska Airlines
Tue, Aug 25 - Sat, Sep 5
SEA
Seattle
ADL
Adelaide
CA $1,796 Roundtrip, found 1 day ago
CA $1,796
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Aug 25 from Seattle to Adelaide, returning Sat, Sep 5, priced at CA $1,796 found 1 day ago
Alaska Airlines
Tue, Aug 25 - Sat, Sep 5
SEA
Seattle
ADL
Adelaide
CA $1,810 Roundtrip, found 1 day ago
CA $1,810
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Aug 25 from Seattle to Adelaide, returning Sat, Sep 5, priced at CA $1,810 found 1 day ago
Alaska Airlines
Tue, Aug 25 - Sat, Sep 5
SEA
Seattle
ADL
Adelaide
CA $1,868 Roundtrip, found 1 day ago
CA $1,868
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Aug 25 from Seattle to Adelaide, returning Sat, Sep 5, priced at CA $1,868 found 1 day ago
Qantas Airways
Tue, May 12 - Sat, May 30
SEA
Seattle
ADL
Adelaide
CA $1,868 Roundtrip, found 12 hours ago
CA $1,868
Roundtrip
found 12 hours ago
Select Qantas Airways flight, departing Tue, May 12 from Seattle to Adelaide, returning Sat, May 30, priced at CA $1,868 found 12 hours ago
Air New Zealand
Wed, Aug 26 - Mon, Sep 7
SEA
Seattle
ADL
Adelaide
CA $2,298 Roundtrip, found 1 day ago
CA $2,298
Roundtrip
found 1 day ago
Select Air New Zealand flight, departing Wed, Aug 26 from Seattle to Adelaide, returning Mon, Sep 7, priced at CA $2,298 found 1 day ago
All Nippon Airways
Tue, Aug 25 - Sat, Sep 5
SEA
Seattle
ADL
Adelaide
CA $2,703 Roundtrip, found 1 day ago
CA $2,703
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Tue, Aug 25 from Seattle to Adelaide, returning Sat, Sep 5, priced at CA $2,703 found 1 day ago
Cathay Pacific
Tue, May 12 - Sat, May 30
SEA
Seattle
ADL
Adelaide
CA $2,734 Roundtrip, found 12 hours ago
CA $2,734
Roundtrip
found 12 hours ago
Select Cathay Pacific flight, departing Tue, May 12 from Seattle to Adelaide, returning Sat, May 30, priced at CA $2,734 found 12 hours ago

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL) cost?
One-way flights typically cost between $3,050 and $20,528 and return flights often range between $3,050 and $20,528. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
August is typically the cheapest month to fly from Seattle - Tacoma Intl. (SEA) to Adelaide (ADL), with average round-trip fares around 2616 CAD. This is about 21% lower than the average price throughout the year. August often sees lower prices as it's outside peak holiday travel seasons, leading to reduced demand. Other cheap months to fly from Seattle - Tacoma Intl. (SEA) to Adelaide (ADL) include February and October.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
When looking for the best time to fly from Seattle - Tacoma Intl. (SEA) to Adelaide (ADL), you'll find that August and February are typically the cheapest months, with average round-trip flights around 2616 CAD. May is the most popular month for travel on this route, meaning you'll have plenty of flight options, though prices might be higher. This information is based on booking data from the past year.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
There are approximately 17 connecting flights per day from Seattle - Tacoma Intl. (SEA) to Adelaide (ADL). Some common connection points include Los Angeles Intl. (LAX), San Francisco Intl. (SFO), and Vancouver Intl. (YVR).
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from SEA to ADL. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
You'll typically find the most flights from Seattle - Tacoma Intl. (SEA) to Adelaide (ADL) on a Sunday, with around 39 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Alaska Airlines, United Airlines, and Air Canada. Flight schedules are consistent throughout the week.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Adelaide, SA (ADL) are in the evening, from 6pm to 9pm. About 34% of passengers prefer this time window. Many major carriers, including United Airlines, Air Canada and Virgin Australia, offer flights during this window. These times work well because you can finish your day in Seattle before your flight and arrive in Adelaide ready to start your day.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
Flights from SEA to ADL with one stop typically take around 21 hours 50 minutes, covering approximately 8,338 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
Select the "Business class" and "First class" filters when looking for SEA to ADL flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Adelaide
Airlines serving
Air Canada, Air New Zealand, Alaska Airlines, All Nippon Airways, American Airlines, Cathay Pacific, Emirates, Malaysia Airlines, Qantas Airways, Qatar Airways, Singapore Airlines
Roundtrip price
CA $1,780
Distance
13340 km

Book with confidence

Seattle to Adelaide Flights

The easy way to book your flights from Seattle to Adelaide 

With Expedia, it’s simple to find and book flights to Adelaide from Seattle whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Adelaide, too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Seattle to Adelaide today, tomorrow, or this week.  

 

Save dollars with cheap flights from Seattle - Tacoma Intl., SEA to Adelaide, ADL 

Sort your search results by price to find great deals on your flight from Seattle to Adelaide—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Adelaide from Seattle currently is just CA $1,780 rising to CA $2,734.  

Here are more money-saving tips: 

  • Fly in August when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Adelaide  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Adelaide from Seattle 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Adelaide with Expedia today.

Seattle to Adelaide Flights

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