HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Asuncion

$446+ Cheap flights from Seattle (SEA) to Asuncion (ASU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ASU
Jan 13 — Jan 201
Tue 1/13
Tue 1/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Asuncion with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seattle to Asuncion

Best flights from Seattle to Asuncion
Discover carefully curated flight deals from Seattle to Asuncion that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 14, 2025.

This LATAM Airlines deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/411:40 pmSEA - ASU
2 stops32h 35mLATAM Airlines
Fri 5/88:10 amASU - SEA
2 stops20h 12mLATAM Airlines
Deal found 12/11$994
This United Airlines deal was found by Cheapflights users on 12/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:45 amSEA - ASU
2 stops18h 39mUnited Airlines
Fri 5/86:33 amASU - SEA
2 stops44h 16mUnited Airlines
Deal found 12/12$1,223
This Travelocity deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/118:44 amSEA - ASU
2 stops27h 56mMultiple Airlines
Thu 1/226:30 pmASU - SEA
2 stops30h 20mMultiple Airlines
Deal found 12/13$4,342
This United Airlines deal was found by Cheapflights users on 12/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/117:00 amSEA - ASU
2 stops41h 37mUnited Airlines
Thu 1/226:42 amASU - SEA
2 stops45h 17mUnited Airlines
Deal found 12/12$5,061

Find flight deals from Seattle to Asuncion

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Asuncion (ASU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 14, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$994
(LATAM Airlines)

One-way from

$446
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$854
Provider with most accurate pricing for Seattle/Tacoma Intl-Asuncion Silvio Pettirossi flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Asuncion Silvio Pettirossi flights.
Search Deals
From Seattle/Tacoma Intl to Asuncion Silvio Pettirossi
Search Deals
One-way flight from Seattle/Tacoma Intl to Asuncion Silvio Pettirossi
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($221 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Asuncion that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 14, 2025.
Use the filters below to find and compare flights from Seattle to Asuncion that are best for you.

Fly from

Seattle

Fly to

Asuncion

Route

Depart

Return

Price

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Mon 5/4

11:40 pm-12:15 pm

2 stops32h 35m

Asuncion Silvio Pettirossi

Fri 5/8

8:10 am-12:22 am

2 stops20h 12m

$994

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Mon 5/4

6:45 am-5:24 am

2 stops18h 39m

Asuncion Silvio Pettirossi

Fri 5/8

6:33 am-10:49 pm

2 stops44h 16m

$1,223

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Sun 1/11

8:44 am-5:40 pm

2 stops27h 56m

Asuncion Silvio Pettirossi

Thu 1/22

6:30 pm-7:50 pm

2 stops30h 20m

$4,342

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Sun 1/11

7:00 am-5:37 am

2 stops41h 37m

Asuncion Silvio Pettirossi

Thu 1/22

6:42 am-10:59 pm

2 stops45h 17m

$5,061

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Sun 1/18

5:43 pm-11:30 am

3 stops36h 47m

$480

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Sat 1/17

5:36 pm-5:40 pm

3 stops43h 04m

$499

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Mon 1/19

12:59 pm-5:40 pm

3 stops47h 41m

$499

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Thu 1/22

6:02 pm-5:15 am

2 stops30h 13m

$506

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Sun 1/25

12:34 pm-12:14 am

3 stops54h 40m

$528

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Tue 1/27

5:59 pm-5:40 pm

3 stops42h 41m

$538

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

Showing 1-10 of 12 results
1
2

Compare providers for flights from Seattle to Asuncion

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Asuncion in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Asuncion flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Asuncion flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Asuncion flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Asuncion flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Asuncion flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Asuncion

Have a flexible travel schedule? Discover the best time to fly to Asuncion from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Asuncion

What is the cheapest time of day to fly from SEA to ASU?

Find hourly flight availability from Seattle to Asuncion. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 14, 2025.

It’s optimal to fly from Seattle to Asuncion at noon. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Asuncion

Get insights into the airlines that provide service to Asuncion. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Asuncion. Reviews last updated December 14, 2025.
Peruse reviews from past customers who have flown with LATAM Airlines from Seattle to Asuncion to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
LATAM Airlines
7.5
Good
1,891 reviews

Boarding

7.6

Food

6.7

Overall

7.5

Crew

8.1

Comfort

7.4

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

LUIS JOSE,Oct 2025

LIM - AEP

Smiles because se upgraded to premiums economy. That was similar to LAN economy years ahí!
LATAM Airlines
7.5
Good
1,891 reviews
LATAM Airlines
7.5
Good
1,891 reviews

Boarding

7.6

Food

6.7

Overall

7.5

Crew

8.1

Comfort

7.4

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

LUIS JOSE,Oct 2025

LIM - AEP

Smiles because se upgraded to premiums economy. That was similar to LAN economy years ahí!

Related info for your journey

Find useful and relevant information for your journey from Seattle to Asuncion. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Asuncion?

    A quick flight from Seattle to Asuncion can take about 18h 39m. LATAM Airlines provides one of the quickest options available for as low as $1,223. The distance from Seattle to Asuncion is about 6426 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Seattle to Asuncion round-trip?

    LATAM Airlines, at $751, was found to be the cheapest airline from Seattle to Asuncion.. LATAM Airlines is priced at 32% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Seattle to Asuncion that include hotel bookings?

    Yes. In addition to deals on Seattle to Asuncion flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Asuncion?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Asuncion.

  • Can I find deals for business class flights from Seattle to Asuncion?

    Yes. Cheapflights offers flight deals from Seattle to Asuncion by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Asuncion

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Asuncion flights
Spokane to Asuncion flights

Top airline flying from Seattle to Asuncion

Discover the top airline that operate flights from Seattle to Asuncion. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
LATAM AirlinesCheapest$751Average$1,020FlexibilityNo cancel feeOn-time81%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.