Cheap Flights from Seattle / Tacoma International to Adelaide

Compare Seattle / Tacoma International to Adelaide flight deals

Find the cheapest month or even day of the year to fly to Adelaide

Book the best Adelaide fare with no extra fees

Flight deals from Seattle / Tacoma International to Adelaide

Looking for a cheap last-minute deal or the best round-trip flight from Seattle / Tacoma International Airport to Adelaide Airport? If you want to travel next month, round-trip fares start from $1,311. Find the lowest prices on one-way and round-trip tickets right here.

Adelaide.$1,311 per passenger.Departing Mon, Jun 8, returning Mon, Jun 15.Round-trip flight with Alaska Airlines and Qantas.Outbound indirect flight with Alaska Airlines, departing from Seattle / Tacoma International on Mon, Jun 8, arriving in Adelaide.Inbound indirect flight with Qantas, departing from Adelaide on Mon, Jun 15, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,311, select.

Adelaide.$1,348 per passenger.Departing Sun, May 31, returning Tue, Jun 16.Round-trip flight with Qantas.Outbound indirect flight with Qantas, departing from Seattle / Tacoma International on Sun, May 31, arriving in Adelaide.Inbound indirect flight with Qantas, departing from Adelaide on Tue, Jun 16, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,348, select.

Adelaide.$1,367 per passenger.Departing Mon, May 4, returning Mon, May 11.Round-trip flight with Qantas.Outbound indirect flight with Qantas, departing from Seattle / Tacoma International on Mon, May 4, arriving in Adelaide.Inbound indirect flight with Qantas, departing from Adelaide on Mon, May 11, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,367, select.

Adelaide.$1,368 per passenger.Departing Tue, Jun 16, returning Wed, Jul 22.Round-trip flight with Qantas.Outbound indirect flight with Qantas, departing from Seattle / Tacoma International on Tue, Jun 16, arriving in Adelaide.Inbound indirect flight with Qantas, departing from Adelaide on Wed, Jul 22, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,368, select.

Adelaide.$1,411 per passenger.Departing Fri, Jul 31, returning Mon, Aug 17.Round-trip flight with Frontier Airlines and Virgin Australia.Outbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Fri, Jul 31, arriving in Adelaide.Inbound indirect flight with Virgin Australia, departing from Adelaide on Mon, Aug 17, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,411, select.

Adelaide.$1,431 per passenger.Departing Fri, Jan 15, returning Sat, Jan 30.Round-trip flight with Alaska Airlines and Fiji Airways.Outbound indirect flight with Alaska Airlines, departing from Seattle / Tacoma International on Fri, Jan 15, arriving in Adelaide.Inbound indirect flight with Fiji Airways, departing from Adelaide on Sat, Jan 30, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,431, select.

Adelaide.$1,500 per passenger.Departing Fri, Jan 15, returning Fri, Mar 5.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Seattle / Tacoma International on Fri, Jan 15, arriving in Adelaide.Inbound indirect flight with Alaska Airlines, departing from Adelaide on Fri, Mar 5, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,500, select.

Adelaide.$1,543 per passenger.Departing Mon, Jul 6, returning Thu, Jul 16.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Seattle / Tacoma International on Mon, Jul 6, arriving in Adelaide.Inbound indirect flight with Alaska Airlines, departing from Adelaide on Thu, Jul 16, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,543, select.

Adelaide.$1,555 per passenger.Departing Wed, Dec 9, returning Wed, Dec 16.Round-trip flight with Alaska Airlines and Qantas.Outbound indirect flight with Alaska Airlines, departing from Seattle / Tacoma International on Wed, Dec 9, arriving in Adelaide.Inbound indirect flight with Qantas, departing from Adelaide on Wed, Dec 16, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,555, select.

Adelaide.$1,580 per passenger.Departing Wed, Oct 14, returning Wed, Oct 21.Round-trip flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departing from Seattle / Tacoma International on Wed, Oct 14, arriving in Adelaide.Inbound indirect flight with Qatar Airways, departing from Adelaide on Wed, Oct 21, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,580, select.

Adelaide.$1,763 per passenger.Departing Thu, Apr 30, returning Mon, May 4.Round-trip flight with Philippine Airlines and Virgin Australia.Outbound indirect flight with Philippine Airlines, departing from Seattle / Tacoma International on Thu, Apr 30, arriving in Adelaide.Inbound indirect flight with Virgin Australia, departing from Adelaide on Mon, May 4, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,763, select.

Adelaide.$2,116 per passenger.Departing Fri, Oct 23, returning Mon, Jan 25.Round-trip flight with Singapore Airlines.Outbound indirect flight with Singapore Airlines, departing from Seattle / Tacoma International on Fri, Oct 23, arriving in Adelaide.Inbound indirect flight with Singapore Airlines, departing from Adelaide on Mon, Jan 25, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $2,116, select.

Find the cheapest month to fly from Seattle / Tacoma International to Adelaide

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle / Tacoma International to Adelaide flights are currently cheapest in June.

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Apr

Seattle / Tacoma International to Adelaide: Alternative routes

Compare routes from Seattle / Tacoma International to Adelaide below. You may find an airport to fly into that's cheaper, faster, or easier than Adelaide.

Adelaide

6km from central Adelaide

ClosestCheapest

from $1,311

Search flights

Seattle to Adelaide: Flight information

The things to know before you go.

Cheapest flight found	$1,311
Cheapest month to fly	June

Finding cheap flights from Seattle / Tacoma International to Adelaide: Frequently asked questions

How much are round-trip flights from Seattle / Tacoma International to Adelaide?

The best price we found for a round-trip flight from Seattle / Tacoma International to Adelaide is $1,311. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from Seattle / Tacoma International to Adelaide?

Currently, there are no airlines that fly direct from Seattle / Tacoma International to Adelaide. But we found flights with one or more stops from $1,311.

How many flights are there a week from Seattle / Tacoma International to Adelaide?

There are no flights flying from Seattle / Tacoma International to Adelaide, as of May 2026.

When is the cheapest time to fly from Seattle / Tacoma International to Adelaide?

The cheapest month to fly from Seattle / Tacoma International to Adelaide is usually June.

Which upcoming date is cheapest to fly from Seattle / Tacoma International Airport to Adelaide Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Adelaide Airport on Monday, June 8, 2026.

Can I get a direct flight from Seattle / Tacoma International Airport to Adelaide Airport?

No airlines currently offer direct flights between Seattle / Tacoma International Airport and Adelaide Airport. Most routes have one or more stops.

How can I find the best flight deal to Adelaide?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Adelaide but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Adelaide?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Adelaide is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly with from Seattle / Tacoma International Airport to Adelaide?

Currently, Alaska Airlines offers the cheapest flight tickets to Adelaide.

Traveling from Seattle-Tacoma International Airport (SEA) to Adelaide Airport (ADL): what you need to know

Adelaide is 17 hours 30 minutes ahead of Seattle and follows the UTC+10:30 timezone.
To ensure you catch your SEA to ADL flight, leave enough time for things like baggage drop and finding your gate. Arriving two hours ahead of international departures and an hour before domestic flights is the general rule.
Flying during a peak month like July? Major public holidays and other popular periods can lead to longer lines and delays at security. Play things extra safe and get there up to four hours before international flights and two hours before a domestic departure.
If you want to include a stop along the way, simply uncheck 'Direct flights only' when searching for your ticket from Seattle-Tacoma International Airport to Adelaide Airport. Here are the most popular stopovers between SEA and ADL:
- Changi International Airport
- Hamad International Airport
- Dubai Airport

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to Adelaide Airport (ADL)

At the moment, $539 is the lowest price we've seen for a one-way Seattle-Tacoma International Airport to Adelaide Airport flight. The best price for a return plane ticket is $1,311. Bear in mind that fares may change due to demand when booking.
It's usually best to book ahead of time if you want to get cheap tickets from SEA to ADL. That's because flight prices are based on demand, which tends to rise closer to the date of departure.
If you're flexible with your trip dates, try using the 'Whole month' search tool. It'll give you the cheapest price across every month when looking for your flight from Seattle-Tacoma International Airport to Adelaide Airport.
There's no need to check every day to find out if fares have dropped when you set up a Price Alert. We'll update you as soon as there's a new deal on cheap flights from SEA to ADL.
Tailor your trip using filters. Pick your preferred departure and arrival times, airlines and total journey duration. You can also sort your results by 'Cheapest,' 'Best' or 'Fastest' flights from Seattle-Tacoma International Airport to Adelaide Airport.

Handy information about Seattle-Tacoma International Airport (SEA)

Seattle-Tacoma International Airport maintains a strong on-time performance, so flight disruptions are less likely. Departures from SEA arrive on schedule 81.27% of the time.
Central Seattle to Seattle-Tacoma International Airport is around 23 kilometers. Depending on traffic, it'll take about 20 minutes to get there if you're driving, catching a cab or ride-sharing.
Planning to catch public transport? Expect a journey time of around 55 minutes.
Searching for a handy hotel close to SEA? If you're boarding an early flight from Seattle-Tacoma International Airport to Adelaide Airport, these stays will put you moments from your departure lounge:

Arriving at Adelaide Airport (ADL)

If you're landing on a late Seattle-Tacoma International Airport to Adelaide Airport flight, nothing tops the convenience of staying close to the terminal. Collect your bags from the carousel and then be showered and snoozing shortly after at one of these hotels near ADL:
Grab an Adelaide Airport rental car and explore Adelaide and beyond with your own set of wheels. Bargain Car Rentals, simba car hire and East Coast are top outlets you can book with here.
For the lowest price, reserve your vehicle from Adelaide Airport about one week before you travel.

Getting from Adelaide Airport (ADL) to central Adelaide

Adelaide Airport to the center of Adelaide has a drive time of about 15 minutes. It's approximately 8 kilometers away.
It takes around 50 minutes if you're using public transport.

When to fly to Adelaide Airport (ADL)

It's time to work out your dates for your flight from Seattle-Tacoma International Airport to Adelaide Airport. January is the most popular month to head to Adelaide. If you want a more low-key vibe, go in April.
Book your flight from Seattle-Tacoma International Airport to Adelaide Airport for January if you'd like to explore Adelaide during its warmest month. Expect temperatures of between 15ºC (59ºF) and 30ºC (86ºF).
August has average temperatures of between 7ºC (45ºF) and 16ºC (61ºF). Look for cheap tickets from SEA to ADL sometime around then if you like traveling in cooler conditions.

Explore more of Australia

You've visited Adelaide, now it's time to discover more of Australia. Travel about 338 kilometers east to Mildura to check off its popular sights. From Mildura Riverfront to Mildura Arts Centre & Rio Vista Homestead and Orange World, your itinerary will be busy.
If you're ready to explore another well-known destination in Australia, consider Mount Gambier, roughly 370 kilometers south-east of Adelaide. The Blue Lake, Engelbrecht Cave and The Valley Lake are key reasons to visit.