Cheap Flights from Seattle to Adelaide

Compare Seattle to Adelaide flight deals

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

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Flight deals from Seattle to Adelaide

Looking for a cheap last-minute deal or the best return flight from Seattle to Adelaide? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Seattle to Adelaide

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

Seattle to Adelaide: Alternative routes

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

Seattle to Adelaide: Flight information

The things to know before you go.
Cheapest flight foundR 10,276
Cheapest month to flyFebruary

Finding cheap flights from Seattle to Adelaide: Frequently asked questions

The best price we found for a return flight from Seattle to Adelaide is R 18,502. 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.
Currently, there are no airlines that fly direct from Seattle to Adelaide. But we found flights with one stop from R 18,502.
As of December 2025, there are no flights flying from Seattle to Adelaide.
The cheapest month to fly from Seattle to Adelaide is usually February.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Adelaide Airport on Monday, 2 February 2026.
No airlines currently offer direct flights between Seattle and Adelaide Airport. Most routes have one or more stops.
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.
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.
The cheapest airline that flies to Adelaide is United .

Flying from Seattle to Adelaide Airport (ADL): What you need to know

  • There are two main airports you can start your journey from in Seattle. Check out your options departing from Seattle-Tacoma International Airport (SEA) or Lake Union Sea Plane Base Airport (LKE) when organising your flight from Seattle to Adelaide Airport (ADL).

  • The timezone in Adelaide is UTC+10:30, which is 17 hours 30 minutes ahead of Seattle. Adelaide Airport is located in Adelaide.

  • Your flight from Seattle to ADL won't wait if you're running late, so get to the airport with time to spare. Arrive up to one hour in advance for domestic flights and two hours ahead when you're travelling internationally.

  • Longer lines at check-in and security are likely if you're jetting off during high season, so allow some extra breathing space. The recommendation for peak times? Arrive up to four hours ahead for international flights and two hours for domestic departures.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • A stopover is the perfect opportunity to break up your trip and perhaps even tour another city. When searching for cheap flights from Seattle to ADL departing from Seattle-Tacoma International Airport (SEA), deselect the 'Direct flights only' box to get ideas for where to visit along the way. Here's where you could connect through:

    • Dubai Airport (DXB)

    • Changi International Airport (SIN)

    • Hamad International Airport (DOH)

  • Travelling from central Seattle to SEA takes around 55 minutes by public transport. If you ride-share, drive or grab a cab, you'll cover the 23 kilometres in 20 minutes or so, depending on traffic conditions.

  • Want a relaxed start to your holiday? Stay near Seattle-Tacoma International Airport. Whether you're catching an early flight from Seattle to Adelaide Airport or aren't a fan of being rushed, these hotels are the ideal choice:

  • 81.27% of flights departing from Seattle-Tacoma International Airport land at their destination on schedule. With its strong on-time stats, you're unlikely to experience delays when jetting out of SEA.

Lake Union Sea Plane Base Airport (LKE)

  • On public transport, you can travel from central Seattle to LKE in around 25 minutes. The terminal is roughly 3 kilometres away, and making the trip by car takes approximately 10 minutes.

  • Want to enjoy an extra night away before your Seattle to ADL flight? Check in to a hotel near Lake Union Sea Plane Base Airport before your holiday officially begins. Here's where you can stay:

About Adelaide Airport (ADL)

  • The last thing you want is a lengthy journey to your hotel if you're arriving on a late flight from Seattle to Adelaide Airport. Make yourself comfy at one of these accommodation options near ADL instead:

  • Grab an Adelaide Airport rental car and discover Adelaide and beyond with your own wheels. Bargain Car Rentals, simba car hire and East Coast are leading providers to choose from here.

  • Booking your ride around one week in advance of your Seattle to Adelaide Airport flight can help you find the best deal.

Getting from Adelaide Airport (ADL) to central Adelaide

  • Adelaide Airport is roughly 6 kilometres from central Adelaide. How long it'll take to get there by car hire or cab depends on the time of day. Do a little research before you go.

  • Travelling by public transport typically takes 50 minutes.

How to find the cheapest flights from Seattle to Adelaide Airport (ADL)

  • The lowest price we've found for a one-way ticket from Seattle to Adelaide Airport is R 10,276. For a return flight on this route, the best price is R 18,502. Depending on when and how early you book, these fares could change.

  • Booking early is often the key to scoring a cheap flight from Seattle to ADL. Fares tend to rise as seats fill up, so the closer you get to departure, the more you'll likely pay.

  • The 'Whole month' search tool will show you the cheapest Seattle to Adelaide Airport tickets throughout the month. It's an easy way to find a bargain if your trip dates are flexible.

  • Snapping up a cheap plane ticket from Seattle to ADL couldn't be easier with Price Alerts. All you need to do is set up one of these automatic alerts and we'll get in touch as soon as a lower fare pops up.

  • Tailor your flights using filters. Choose your ideal arrival and departure times, total journey duration and airlines. You can also sort your results by 'Cheapest,' 'Fastest' or 'Best' flights from Seattle to Adelaide Airport.

The best time to fly from Seattle to Adelaide Airport (ADL)

  • Think about the kind of experience you want when deciding your trip dates. April is the quietest month to visit Adelaide. July is when most people book flights from Seattle to Adelaide Airport (ADL), which may be ideal if you're chasing more action.

  • The warmest month in Adelaide is January, with temperatures ranging between 15ºC (59ºF) and 30ºC (86ºF). Lock in your Seattle to ADL plane ticket then if that's your definition of good weather.

  • Look for cheap tickets from Seattle to Adelaide Airport in August if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between 7ºC (45ºF) and 16ºC (61ºF).

More about Adelaide

  • After booking your flight from Seattle to Adelaide Airport, find a hotel that's got location and comfort covered. Make one of these accommodation options your base for exploring Adelaide:

  • There are loads of exciting things to do in Adelaide when you're ready to sightsee. Kick things off at St Peter's Cathedral followed by Adelaide Fringe Festival and Adelaide Oval.

Explore more of Australia

  • You've visited Adelaide, now it's time to discover more of Australia. Journey about 241 kilometres west to Port Lincoln to tick off its popular sights. From Lincoln National Park to Winter Hill Lookout and Heritage trail, there's plenty to keep you busy.

  • Port Pirie is another must-experience destination in Australia and is around 209 kilometres north of Adelaide. No journey is complete without a visit to Solomontown Beach, Telowie Beach and Port Pirie Military Museum.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.