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$359+ Cheap flights from Seattle (SEA) to Buenos Aires (BUE)

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 4/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BUE
Mar 31 — Apr 71
Tue 3/31
Tue 4/7
1 adult, Economy
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Cheap flight deals from Seattle to Buenos Aires

Cheapest flights from Seattle to Buenos Aires
Explore the most affordable flight options available from Seattle to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 1, 2026.

This Vliegwinkel deal was found by Cheapflights users on 2/28. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2310:57 am
SEA
-
EZE
2 stops31h 28m
Multiple Airlines
Wed 5/69:02 am
EZE
-
SEA
2 stops36h 40m
Multiple Airlines
Deal found 2/28$878
This Kiwi.com deal was found by Cheapflights users on 2/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/148:00 am
SEA
-
EZE
2 stops27h 40m
Multiple Airlines
Tue 4/211:10 pm
EZE
-
SEA
1 stop36h 37m
Multiple Airlines
Deal found 2/28$892
This Kiwi.com deal was found by Cheapflights users on 3/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/308:05 am
SEA
-
EZE
2 stops39h 40m
Multiple Airlines
Mon 4/61:10 pm
EZE
-
SEA
1 stop36h 50m
Multiple Airlines
Deal found 3/1$909
This Kiwi.com deal was found by Cheapflights users on 3/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/308:05 am
SEA
-
EZE
2 stops39h 40m
Multiple Airlines
Tue 4/71:10 pm
EZE
-
SEA
1 stop36h 50m
Multiple Airlines
Deal found 3/1$914
This Kiwi.com deal was found by Cheapflights users on 2/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/218:00 am
SEA
-
EZE
1 stop21h 20m
Multiple Airlines
Tue 5/54:50 pm
EZE
-
SEA
2 stops32h 57m
Multiple Airlines
Deal found 2/26$916
This Kiwi.com deal was found by Cheapflights users on 3/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/286:24 pm
SEA
-
EZE
2 stops28h 06m
Multiple Airlines
Mon 4/61:10 pm
EZE
-
SEA
1 stop36h 50m
Multiple Airlines
Deal found 3/1$922
This Kiwi.com deal was found by Cheapflights users on 2/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:24 pm
SEA
-
EZE
2 stops33h 31m
Multiple Airlines
Tue 4/211:10 pm
EZE
-
SEA
1 stop36h 37m
Multiple Airlines
Deal found 2/28$923
This Kiwi.com deal was found by Cheapflights users on 3/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/286:24 pm
SEA
-
EZE
2 stops30h 06m
Multiple Airlines
Tue 4/71:10 pm
EZE
-
SEA
1 stop36h 50m
Multiple Airlines
Deal found 3/1$927
This Kiwi.com deal was found by Cheapflights users on 3/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:24 pm
SEA
-
EZE
2 stops33h 31m
Multiple Airlines
Mon 4/61:10 pm
EZE
-
SEA
1 stop36h 50m
Multiple Airlines
Deal found 3/1$934
This Trip.com deal was found by Cheapflights users on 2/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/610:42 am
SEA
-
EZE
2 stops20h 48m
Multiple Airlines
Thu 5/213:55 am
EZE
-
SEA
2 stops37h 06m
Multiple Airlines
Deal found 2/28$968
This Trip.com deal was found by Cheapflights users on 2/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:25 am
SEA
-
AEP
2 stops21h 15m
Multiple Airlines
Wed 5/67:20 pm
AEP
-
SEA
2 stops29h 30m
Multiple Airlines
Deal found 2/28$1,039
This FlightHub deal was found by Cheapflights users on 2/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:20 am
SEA
-
AEP
2 stops20h 20m
LATAM Airlines
Tue 9/295:35 pm
AEP
-
SEA
2 stops23h 23m
LATAM Airlines
Deal found 2/28$1,087

Find flight deals from Seattle to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Buenos Aires (BUE). 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 March 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$878
(Vliegwinkel)

One-way from

$359
(Kiwi.com)

Popular in

April

Cheapest in

June

Average price

$1,350
Provider with most accurate pricing for Seattle/Tacoma Intl-Buenos Aires (BUE) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Buenos Aires (BUE) flights.
Search Deals
From Seattle/Tacoma Intl to Buenos Aires (BUE)
Search Deals
One-way flight from Seattle/Tacoma Intl to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Buenos Aires 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 March 1, 2026.
Use the filters below to find and compare flights from Seattle to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 3/10

6:24 pm-10:58 pm

2 stops24h 34m

Buenos Aires Ministro Pistarini

Tue 3/17

11:00 am-10:00 pm

1 stop39h 00m

$1,048

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Tue 4/21

7:25 am-7:40 am

2 stops20h 15m

Buenos Aires Jorge Newbery

Tue 5/5

8:05 pm-2:42 pm

2 stops22h 37m

$1,089

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Wed 4/29

6:00 am-7:40 am

2 stops21h 40m

Buenos Aires Jorge Newbery

Wed 5/6

7:20 pm-12:35 pm

2 stops21h 15m

$1,089

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 4/29

6:30 am-8:00 am

1 stop21h 30m

Buenos Aires Ministro Pistarini

Wed 5/6

9:00 pm-12:45 pm

1 stop19h 45m

$1,097

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Thu 4/30

1:21 pm-10:25 pm

2 stops29h 04m

Buenos Aires Ministro Pistarini

Tue 5/5

2:49 pm-7:48 pm

2 stops32h 59m

$1,139

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Wed 4/29

6:00 am-7:40 am

2 stops21h 40m

Buenos Aires Jorge Newbery

Tue 5/5

7:20 pm-12:37 pm

2 stops21h 17m

$1,149

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 3/10

7:21 am-7:10 am

2 stops19h 49m

Buenos Aires Ministro Pistarini

Tue 3/17

10:25 pm-1:52 pm

2 stops19h 27m

$1,171

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Fri 5/1

7:00 am-8:00 am

1 stop21h 00m

Buenos Aires Ministro Pistarini

Tue 5/5

9:00 pm-7:44 pm

1 stop26h 44m

$1,182

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 4/13

6:30 am-8:00 am

1 stop21h 30m

Buenos Aires Ministro Pistarini

Mon 4/27

9:00 pm-12:47 pm

1 stop19h 47m

$1,202

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 4/8

6:30 am-8:00 am

1 stop21h 30m

Buenos Aires Ministro Pistarini

Tue 4/21

9:00 pm-12:47 pm

1 stop19h 47m

$1,202

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/27

Showing 1-10 of 38 resultsSorted by cheapest first
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Compare providers for flights from Seattle to Buenos Aires

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 Buenos Aires in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*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-Buenos Aires flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Buenos Aires flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Buenos Aires flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Buenos Aires flights, Cheapflights users trust FlightHub the most. FlightHub 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-Buenos Aires 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 Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires 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 Buenos Aires

How far ahead should I book a flight from Seattle to Buenos Aires?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Buenos Aires. Price data was last updated on February 27, 2026.

Booking 25 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Buenos Aires. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Seattle to Buenos Aires?

Currently, March is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of $159). Flying from Seattle to Buenos Aires in February is currently the most expensive (average of $1,214). 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.

How often are flights from Seattle to Buenos Aires delayed?

About 100% of weekly flights between Seattle and Buenos Aires have experienced delays in the past year, with the average delay time being 99 minutes.

What is the most punctual flight time for Seattle to Buenos Aires flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Reviews of airlines servicing Buenos Aires

Get insights into the airlines that provide service to Buenos Aires. 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 Buenos Aires. Reviews last updated March 1, 2026.
Read reviews from past customers who have flown Delta, LATAM Airlines, and United Airlines from Seattle to Buenos Aires. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,237 reviews

Comfort

7.9

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,237 reviews
Delta
7.9
Good
8,237 reviews

Comfort

7.9

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
LATAM Airlines
7.5
Good
1,920 reviews
Delta
7.9
Good
8,237 reviews

Comfort

7.9

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,376 reviews
Delta
7.9
Good
8,237 reviews

Comfort

7.9

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,369 reviews
Delta
7.9
Good
8,237 reviews

Comfort

7.9

Boarding

8.1

Overall

7.9

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

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

  • What airport do you fly from for flights from Seattle to Buenos Aires?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Buenos Aires. On average, Seattle/Tacoma Intl has 0 outbound flights to Buenos Aires per day from 4 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from Seattle to Buenos Aires?

    For as low as $1,089, LATAM Airlines can have you in Buenos Aires from Seattle in 20h 15m. The distance from Seattle to Buenos Aires is about 6901 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to Buenos Aires round-trip?

    Cheapflights users have booked flights from Seattle to Buenos Aires round-trip from $297. Other airlines that can offer you cheap pricing are LATAM Airlines, from $696, and American Airlines, from $1,036. You may be able to fly from Seattle to Buenos Aires for 77% less than the average price by searching for these airlines.

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

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

  • How can I find direct flights from Seattle to Buenos Aires?

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

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

    Yes. Cheapflights offers flight deals from Seattle to Buenos Aires 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 Buenos Aires?

    Currently, March is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of $159). Flying from Seattle to Buenos Aires in February is currently the most expensive (average of $1,214). 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

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Alternative routes for Seattle to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Ministro Pistarini flights
Seattle to Mendoza flights
Spokane to Ministro Pistarini flights
Seattle to San Miguel de Tucumán flights

Top 4 airlines flying from Seattle to Buenos Aires

Discover the top 4 airlines that operate flights from Seattle to Buenos Aires. 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 March 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$297Average$1,325FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$696Average$1,225FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$1,036Average$1,275FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,116Average$1,260FlexibilityNo cancel feeOn-time69%

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