HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Asuncion

$618+ 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 12/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ASU
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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

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 September 11, 2025.

Round-trip from

$832
(United Airlines)

One-way from

$618
(Kiwi.com)

Popular in

November

Cheapest in

September

Average price

$891
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. 17% potential increase in price ($268 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($56 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Seattle to Asuncion

Cheapest flights from Seattle to Asuncion
Explore the most affordable flight options available from Seattle to Asuncion. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 10/2510:54 pmSEA - ASU
2 stops21h 07mUnited Airlines
Fri 10/311:46 amASU - SEA
2 stops27h 13mUnited Airlines
Deal found 9/9$832
This LATAM Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 10/257:10 amSEA - ASU
2 stops19h 05mLATAM Airlines
Sat 11/11:20 pmASU - SEA
2 stops25h 54mLATAM Airlines
Deal found 9/9$2,094
This Travelocity deal was found by Cheapflights users on 9/10. 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.
Fri 10/1010:55 pmSEA - ASU
2 stops51h 15mMultiple Airlines
Tue 10/218:25 amASU - SEA
2 stops32h 31mMultiple Airlines
Deal found 9/10$4,456
This Travelocity deal was found by Cheapflights users on 9/11. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/117:19 amSEA - ASU
2 stops42h 51mMultiple Airlines
Wed 10/228:25 amASU - SEA
2 stops30h 04mMultiple Airlines
Deal found 9/11$4,475
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 10/1011:10 pmSEA - ASU
2 stops20h 51mUnited Airlines
Mon 10/201:45 amASU - SEA
3 stops23h 30mUnited Airlines
Deal found 9/10$5,442
This KAYAK deal was found by Cheapflights users on 9/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/119:59 pmSEA - ASU
3 stops40h 01mLATAM Airlines
Wed 10/228:25 amASU - SEA
2 stops32h 31mLATAM Airlines
Deal found 9/11$7,665

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 September 11, 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

Sat 10/25

10:54 pm-12:01 am

2 stops21h 07m

Asuncion Silvio Pettirossi

Fri 10/31

1:46 am-12:59 am

2 stops27h 13m

$832

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Sat 10/25

7:10 am-6:15 am

2 stops19h 05m

Asuncion Silvio Pettirossi

Sat 11/1

1:20 pm-11:14 am

2 stops25h 54m

$2,094

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Fri 10/10

10:55 pm-6:10 am

2 stops51h 15m

Asuncion Silvio Pettirossi

Tue 10/21

8:25 am-12:56 pm

2 stops32h 31m

$4,456

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Sat 10/11

7:19 am-6:10 am

2 stops42h 51m

Asuncion Silvio Pettirossi

Wed 10/22

8:25 am-10:29 am

2 stops30h 04m

$4,475

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Fri 10/10

11:10 pm-12:01 am

2 stops20h 51m

Asuncion Silvio Pettirossi

Mon 10/20

1:45 am-9:15 pm

3 stops23h 30m

$5,442

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Sat 10/11

9:59 pm-6:00 pm

3 stops40h 01m

Asuncion Silvio Pettirossi

Wed 10/22

8:25 am-12:56 pm

2 stops32h 31m

$7,665

SeattleAsuncion

SEA - ASU

SEAASU

Seattle/Tacoma Intl

Mon 12/22

9:15 pm-5:15 am

3 stops51h 00m

$618

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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 September 11, 2025.

It’s optimal to fly from Seattle to Asuncion at noon. By choosing this option you can save up to 17% 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 September 11, 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
1,847 reviews

Food

6.7

Boarding

7.6

Overall

7.5

Entertainment

7.0

Crew

8.0

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
LATAM Airlines
7.5
Good
1,847 reviews
LATAM Airlines
7.5
Good
1,847 reviews

Food

6.7

Boarding

7.6

Overall

7.5

Entertainment

7.0

Crew

8.0

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing

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 19h 05m. United Airlines provides one of the quickest options available for as low as $2,094. 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 42% 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.

  • What is the cheapest month to book a flight from Seattle to Asuncion?

    Currently, April is the cheapest month in which you can book a flight from Seattle to Asuncion (average of $715). Flying from Seattle to Asuncion in December is currently the most expensive (average of $1,024). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
LATAM AirlinesCheapest$751Average$1,111FlexibilityNo 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.