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$406+ 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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BUE
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Buenos Aires are usually found in May or September, booked 25 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap 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 November 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$925
(LATAM Airlines)

One-way from

$406
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$1,343
Provider with most accurate pricing for Seattle/Tacoma Intl-Buenos Aires (BUE) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Buenos Aires (BUE) flights.
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From Seattle/Tacoma Intl to Buenos Aires (BUE)
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One-way flight from Seattle/Tacoma Intl to Buenos Aires (BUE)
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Highest demand for flights based on searches. 4% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 4, 2025.

This LATAM Airlines deal was found by Cheapflights users on 11/4. 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.
Wed 12/37:55 amSEA - EZE
2 stops20h 20mLATAM Airlines
Mon 12/88:00 amEZE - SEA
2 stops19h 54mLATAM Airlines
Deal found 11/4$925
This LATAM Airlines deal was found by Cheapflights users on 11/3. 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.
Wed 12/37:55 amSEA - EZE
1 stop20h 40mLATAM Airlines
Wed 12/107:43 pmEZE - SEA
2 stops23h 35mLATAM Airlines
Deal found 11/3$945
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 12/95:51 pmSEA - EZE
2 stops33h 08mMultiple Airlines
Tue 12/1611:00 amEZE - SEA
1 stop40h 30mMultiple Airlines
Deal found 11/3$949
This FlightHub deal was found by Cheapflights users on 11/3. 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.
Wed 12/37:10 amSEA - EZE
2 stops21h 05mLATAM Airlines
Fri 12/128:00 amEZE - SEA
2 stops19h 54mLATAM Airlines
Deal found 11/3$950
This FlightHub deal was found by Cheapflights users on 11/2. 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.
Sat 12/67:10 amSEA - EZE
2 stops21h 05mLATAM Airlines
Fri 12/127:45 amEZE - SEA
2 stops20h 09mLATAM Airlines
Deal found 11/2$954
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 12/98:45 amSEA - EZE
1 stop19h 50mMultiple Airlines
Mon 12/154:55 pmEZE - SEA
2 stops34h 35mMultiple Airlines
Deal found 11/3$957
This United Airlines deal was found by Cheapflights users on 11/3. 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 11/177:10 amSEA - EZE
1 stop21h 10mUnited Airlines
Wed 11/2610:05 pmEZE - SEA
1 stop26h 20mUnited Airlines
Deal found 11/3$965
This KAYAK deal was found by Cheapflights users on 11/3. 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.
Mon 11/176:00 amSEA - AEP
2 stops20h 55mLATAM Airlines
Thu 11/273:40 pmAEP - SEA
2 stops28h 04mLATAM Airlines
Deal found 11/3$965
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Thu 12/115:00 amSEA - EZE
2 stops21h 20mUnited Airlines
Thu 12/1810:05 pmEZE - SEA
2 stops29h 32mUnited Airlines
Deal found 11/3$969
This American Airlines deal was found by Cheapflights users on 11/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/212:41 amSEA - EZE
1 stop26h 24mAmerican Airlines
Mon 12/810:10 amEZE - SEA
1 stop18h 06mAmerican Airlines
Deal found 11/4$977
This United Airlines deal was found by Cheapflights users on 11/3. 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 11/3011:59 pmSEA - EZE
1 stop26h 21mUnited Airlines
Tue 12/911:55 pmEZE - SEA
1 stop24h 27mUnited Airlines
Deal found 11/3$978
This KAYAK deal was found by Cheapflights users on 11/4. 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.
Tue 12/27:10 amSEA - AEP
2 stops22h 20mLATAM Airlines
Sun 12/1411:30 amAEP - SEA
2 stops27h 49mLATAM Airlines
Deal found 11/4$1,007

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 November 4, 2025.
Use the filters below to find and compare flights from Seattle to Buenos Aires that are best for you.

Fly from

Seattle

Fly to

Buenos Aires

Route

Depart

Return

Price

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 2/3

7:00 am-7:20 am

1 stop19h 20m

Buenos Aires Ministro Pistarini

Tue 2/17

11:55 pm-6:03 pm

2 stops23h 08m

$965

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 12/10

7:25 am-7:20 am

1 stop18h 55m

Buenos Aires Ministro Pistarini

Mon 12/15

11:55 pm-5:47 pm

1 stop22h 52m

$965

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Mon 11/17

6:00 am-7:55 am

2 stops20h 55m

Buenos Aires Jorge Newbery

Wed 11/26

2:55 pm-10:15 am

2 stops24h 20m

$965

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 11/18

7:10 am-9:20 am

1 stop21h 10m

Buenos Aires Ministro Pistarini

Wed 11/26

11:55 pm-7:25 pm

1 stop24h 30m

$965

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Tue 12/9

7:10 am-10:30 am

2 stops22h 20m

Buenos Aires Jorge Newbery

Tue 12/16

3:40 pm-12:40 pm

2 stops26h 00m

$965

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 11/18

7:10 am-9:20 am

1 stop21h 10m

Buenos Aires Ministro Pistarini

Mon 12/1

11:55 pm-7:22 pm

1 stop24h 27m

$965

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Wed 12/10

5:00 pm-6:40 pm

2 stops20h 40m

Buenos Aires Jorge Newbery

Wed 12/17

8:50 am-10:19 am

2 stops30h 29m

$965

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 11/17

7:10 am-7:20 am

1 stop19h 10m

Buenos Aires Ministro Pistarini

Tue 11/25

10:05 pm-6:10 pm

2 stops25h 05m

$965

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Sun 11/16

11:00 pm-7:55 am

2 stops27h 55m

Buenos Aires Jorge Newbery

Tue 11/25

6:20 pm-2:29 pm

2 stops25h 09m

$965

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Thu 12/11

7:10 am-9:20 am

1 stop21h 10m

Buenos Aires Ministro Pistarini

Tue 12/16

10:05 pm-12:42 pm

1 stop19h 37m

$965

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 36 results
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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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Buenos Aires flight deals on Cheapflights vs. eDreams >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 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-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 October 31, 2025.

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, June is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of $742). Flying from Seattle to Buenos Aires in October is currently the most expensive (average of $1,232). 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.

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

Find hourly flight availability from Seattle to Buenos Aires. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 4, 2025.

It’s optimal to fly from Seattle to Buenos Aires in the morning. By choosing this option you can save up to 23% on the cost of your flight, compared to a flight in the evening.

How much does it cost to fly round-trip from Seattle to Buenos Aires?

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 November 4, 2025.
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
8,002 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

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
8,002 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

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
1,873 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

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
8,998 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

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
7.2
Good
11,038 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

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 3 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 $965, United Airlines can have you in Buenos Aires from Seattle in 18h 55m. The distance from Seattle to Buenos Aires is about 6911 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 $1,036. Other airlines that can offer you cheap pricing are Delta, from $1,115, and United Airlines, from $1,200. You may be able to fly from Seattle to Buenos Aires for 24% 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, June is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of $742). Flying from Seattle to Buenos Aires in October is currently the most expensive (average of $1,232). 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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Top 3 airlines flying from Seattle to Buenos Aires

Discover the top 3 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 November 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$1,036Average$1,360FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,115Average$1,390FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,200Average$1,289FlexibilityNo cancel feeOn-time69%

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