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CA $934 Cheap Flights from Seattle (SEA) to Adelaide (ADL)

View CA $934 flight on Sun, Sep 27, 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 $934 for one-way flights and CA $1,954 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Qatar Airways
Sat, Apr 24 - Tue, May 4
SEA
Seattle
ADL
Adelaide
CA $1,954 Roundtrip, found 5 days ago
CA $1,954
Roundtrip
found 5 days ago
Select Qatar Airways flight, departing Sat, Apr 24 from Seattle to Adelaide, returning Tue, May 4, priced at CA $1,954 found 5 days ago
Qatar Airways
Sat, Apr 24 - Tue, May 4
SEA
Seattle
ADL
Adelaide
CA $2,053 Roundtrip, found 5 days ago
CA $2,053
Roundtrip
found 5 days ago
Select Qatar Airways flight, departing Sat, Apr 24 from Seattle to Adelaide, returning Tue, May 4, priced at CA $2,053 found 5 days ago
Qantas Airways
Sat, Apr 24 - Tue, May 4
SEA
Seattle
ADL
Adelaide
CA $2,119 Roundtrip, found 5 days ago
CA $2,119
Roundtrip
found 5 days ago
Select Qantas Airways flight, departing Sat, Apr 24 from Seattle to Adelaide, returning Tue, May 4, priced at CA $2,119 found 5 days ago
Qantas Airways
Sat, Apr 24 - Tue, May 4
SEA
Seattle
ADL
Adelaide
CA $2,137 Roundtrip, found 5 days ago
CA $2,137
Roundtrip
found 5 days ago
Select Qantas Airways flight, departing Sat, Apr 24 from Seattle to Adelaide, returning Tue, May 4, priced at CA $2,137 found 5 days ago
American Airlines
Sat, Apr 24 - Tue, May 4
SEA
Seattle
ADL
Adelaide
CA $2,150 Roundtrip, found 5 days ago
CA $2,150
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Apr 24 from Seattle to Adelaide, returning Tue, May 4, priced at CA $2,150 found 5 days ago
American Airlines
Sat, Apr 24 - Tue, May 4
SEA
Seattle
ADL
Adelaide
CA $2,168 Roundtrip, found 5 days ago
CA $2,168
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Apr 24 from Seattle to Adelaide, returning Tue, May 4, priced at CA $2,168 found 5 days ago
Qatar Airways
Sat, Apr 24 - Tue, May 4
SEA
Seattle
ADL
Adelaide
CA $2,186 Roundtrip, found 5 days ago
CA $2,186
Roundtrip
found 5 days ago
Select Qatar Airways flight, departing Sat, Apr 24 from Seattle to Adelaide, returning Tue, May 4, priced at CA $2,186 found 5 days ago
Qantas Airways
Sat, Apr 24 - Tue, May 4
SEA
Seattle
ADL
Adelaide
CA $2,190 Roundtrip, found 5 days ago
CA $2,190
Roundtrip
found 5 days ago
Select Qantas Airways flight, departing Sat, Apr 24 from Seattle to Adelaide, returning Tue, May 4, priced at CA $2,190 found 5 days ago
Singapore Airlines
Tue, Jan 5 - Sat, Jan 30
SEA
Seattle
ADL
Adelaide
CA $3,142 Roundtrip, found 6 days ago
CA $3,142
Roundtrip
found 6 days ago
Select Singapore Airlines flight, departing Tue, Jan 5 from Seattle to Adelaide, returning Sat, Jan 30, priced at CA $3,142 found 6 days ago
Japan Airlines
Sat, Apr 24 - Tue, May 4
SEA
Seattle
ADL
Adelaide
CA $5,000 Roundtrip, found 5 days ago
CA $5,000
Roundtrip
found 5 days ago
Select Japan Airlines flight, departing Sat, Apr 24 from Seattle to Adelaide, returning Tue, May 4, priced at CA $5,000 found 5 days ago

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL) cost?
You can find cheap one-way flights from CA $934 and cheap return flights from CA $1,954 SEA to ADL with Expedia. Return flights often range between CA$1637 and CA$11046. 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 SEA to ADL 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 return fares around CA$1495. August often sees lower prices as it falls outside of peak holiday travel seasons, leading to reduced demand and more competitive airline pricing. Other budget-friendly months to consider for your trip include February and October.
Which airlines fly direct from Seattle, WA (SEA) to Adelaide, SA (ADL)?
Enter SEA to ADL and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
Delta is one of the cheapest airlines offering connecting return flights from Seattle - Tacoma Intl. (SEA) to Adelaide (ADL), with prices starting from around CA$2583 for flights that can be booked for departure within the next year, typically with a layover in Los Angeles Intl. (LAX). These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Seattle, WA (SEA) to Adelaide, SA (ADL)?
To find a cheap flight from Seattle, WA (SEA) 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) to Adelaide, SA (ADL)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
While there aren't any direct flights, you'll find approximately 16 connecting flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (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) to Adelaide, SA (ADL)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from Seattle, WA (SEA) to Adelaide, SA (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 generally find the most flights from Seattle - Tacoma Intl. (SEA) to Adelaide, SA (ADL) on a Thursday, with around 34 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Alaska Airlines, United, and Air Canada. There are notably more flight options on Thursdays compared to other days of the week, so if flexibility is key, this could be a great day to consider flying.
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 (ADL) are in the evening, between 6pm and 9pm. Many major carriers, including United, Air Canada and Alaska Airlines, offer flights during this window. This timing works well because you can make the most of your day in Seattle before your evening flight.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
There are no nonstop flights from Seattle - Tacoma Intl. (SEA) to Adelaide (ADL). Flights with one stop typically take around 21 hours 48 minutes, covering a distance of approximately 13,418 kilometres. If you have two or more stops, your travel time will be longer, usually around 23 hours 18 minutes. Keep in mind that actual flight times can vary due to factors like layover duration, routing, and weather conditions.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Adelaide, SA (ADL)?
Yes, you can fly business class from Seattle (SEA) to Adelaide (ADL). Airlines that offer business class service on this route include:
  • Alaska Airlines
  • Cathay Pacific
  • Qatar Airways
  • Singapore Airlines
  • Japan Airlines
  • Emirates
  • American Airlines
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) to Adelaide, SA (ADL)?
If you booked your Seattle, WA (SEA) 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
Roundtrip price
CA $1,953
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 $1,954 rising to CA $5,000.  

Here are more money-saving tips: 

  • Fly in April 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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*Available to Expedia members.