$416 Cheap Flights from Seattle (SEA) to Asuncion (ASU)

View $416 flight on Mon, Oct 27, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Asuncion (ASU-Silvio Pettirossi Intl.)

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Cheap Flights from Seattle to Asuncion (SEA-ASU)

Prices were available within the past 7 days and start at $416 for one-way flights and $830 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Nov 8 - Tue, Nov 25
SEA
Seattle
ASU
Asuncion
$830 Roundtrip, found 3 days ago
$830
Roundtrip
found 3 days ago
Select United flight, departing Sat, Nov 8 from Seattle to Asuncion, returning Tue, Nov 25, priced at $830 found 3 days ago
United
Wed, Oct 22 - Sun, Nov 9
SEA
Seattle
ASU
Asuncion
$831 Roundtrip, found 2 days ago
$831
Roundtrip
found 2 days ago
Select United flight, departing Wed, Oct 22 from Seattle to Asuncion, returning Sun, Nov 9, priced at $831 found 2 days ago
United
Thu, Sep 25 - Fri, Oct 3
SEA
Seattle
ASU
Asuncion
$832 Roundtrip, found 2 days ago
$832
Roundtrip
found 2 days ago
Select United flight, departing Thu, Sep 25 from Seattle to Asuncion, returning Fri, Oct 3, priced at $832 found 2 days ago
United
Sat, Nov 8 - Tue, Nov 25
SEA
Seattle
ASU
Asuncion
$839 Roundtrip, found 3 days ago
$839
Roundtrip
found 3 days ago
Select United flight, departing Sat, Nov 8 from Seattle to Asuncion, returning Tue, Nov 25, priced at $839 found 3 days ago
United
Sat, Nov 8 - Tue, Nov 25
SEA
Seattle
ASU
Asuncion
$855 Roundtrip, found 3 days ago
$855
Roundtrip
found 3 days ago
Select United flight, departing Sat, Nov 8 from Seattle to Asuncion, returning Tue, Nov 25, priced at $855 found 3 days ago
United
Wed, Oct 22 - Sun, Nov 9
SEA
Seattle
ASU
Asuncion
$856 Roundtrip, found 2 days ago
$856
Roundtrip
found 2 days ago
Select United flight, departing Wed, Oct 22 from Seattle to Asuncion, returning Sun, Nov 9, priced at $856 found 2 days ago
Delta
Sat, Sep 27 - Fri, Oct 3
SEA
Seattle
ASU
Asuncion
$880 Roundtrip, found 2 days ago
$880
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Sep 27 from Seattle to Asuncion, returning Fri, Oct 3, priced at $880 found 2 days ago
Alaska Airlines
Fri, Jul 24 - Sun, Aug 2
SEA
Seattle
ASU
Asuncion
$890 Roundtrip, found 3 days ago
$890
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Fri, Jul 24 from Seattle to Asuncion, returning Sun, Aug 2, priced at $890 found 3 days ago
LATAM Airlines Group
Sat, Nov 1 - Sat, Nov 8
SEA
Seattle
ASU
Asuncion
$895 Roundtrip, found 4 hours ago
$895
Roundtrip
found 4 hours ago
Select LATAM Airlines Group flight, departing Sat, Nov 1 from Seattle to Asuncion, returning Sat, Nov 8, priced at $895 found 4 hours ago
Copa
Sat, Nov 8 - Tue, Nov 25
SEA
Seattle
ASU
Asuncion
$932 Roundtrip, found 3 days ago
$932
Roundtrip
found 3 days ago
Select Copa flight, departing Sat, Nov 8 from Seattle to Asuncion, returning Tue, Nov 25, priced at $932 found 3 days ago

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Silvio Pettirossi Intl. Airport (ASU) cost?
Snag a cheap one-way flight from $416 or cheap return flight from $830 from Seattle - Tacoma Intl. Airport (SEA) to Silvio Pettirossi Intl. Airport (ASU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Silvio Pettirossi Intl. Airport (ASU)?
Planning your trip for November is a great way to save, as it's the cheapest month for flights between SEA and ASU. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Silvio Pettirossi Intl. Airport (ASU)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SEA to ASU flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Silvio Pettirossi Intl. Airport (ASU)?
You'll need to take a flight with a layover when traveling from Seattle - Tacoma Intl. Airport (SEA) to Silvio Pettirossi Intl. Airport (ASU). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from SEA to ASU?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Silvio Pettirossi Intl. Airport (ASU)?
To land at Silvio Pettirossi Intl. Airport (ASU) on time, choose a flight that leaves from Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Silvio Pettirossi Intl. Airport (ASU) last-minute?
Last-minute bookings from SEA to ASU are typically more expensive. To secure the lowest rates, start looking for flights early. That said, if you can play around with your travel dates, it's possible to find a cheap ticket right before your journey.
Is it cheaper to book a SEA to ASU flight and hotel package?
Securing a SEA to ASU flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Select from our impressive range of hotels 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 - Tacoma Intl. Airport (SEA) to Silvio Pettirossi Intl. Airport (ASU)?
Generally, it's possible to reschedule or cancel your SEA to ASU flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Silvio Pettirossi Intl.
Airlines serving
Copa, GOL Linhas Aereas S.A., LATAM Airlines Group, United
Roundtrip price
$829
Distance
6430 mi

Book with confidence

Book with confidence

Seattle to Asuncion Flights

The cheapest times to fly from Seattle to Asuncion

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Asuncion are during the month of November. You can find some of the cheapest flights from Seattle to Asuncion with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Asuncion

Sunday is one of the best days to book for cheap flights from Seattle to Asuncion: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Asuncion

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Asuncion in 2025. You can also book with separate airlines for your outbound and return journeys, from $416 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Asuncion flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Asuncion airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to Asuncion Flights

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*Available to One Key members.