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$401+ 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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BUE
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Buenos Aires are usually found in October or May, booked 11 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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,028
(Copa Airlines)

One-way from

$401
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$1,460
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)
Search Deals
One-way flight from Seattle/Tacoma Intl to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 17, 2025.

This Copa Airlines deal was found by Cheapflights users on 4/16. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/115:30 pmSEA - EZE
2 stops24h 38mCopa Airlines
Wed 9/1712:06 amEZE - SEA
2 stops26h 30mCopa Airlines
Deal found 4/16$1,028
This Mytrip deal was found by Cheapflights users on 4/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/15:35 amSEA - EZE
3 stops32h 37mMultiple Airlines
Sun 6/87:30 amEZE - SEA
3 stops33h 28mMultiple Airlines
Deal found 4/17$1,029
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:20 amSEA - EZE
1 stop21h 25mDelta
Tue 12/28:55 pmEZE - SEA
1 stop24h 43mDelta
Deal found 4/16$1,075
This LATAM Airlines deal was found by Cheapflights users on 4/17. 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 11/1711:50 amSEA - AEP
2 stops25h 10mLATAM Airlines
Tue 12/27:10 pmAEP - SEA
2 stops22h 15mLATAM Airlines
Deal found 4/17$1,075
This Mytrip deal was found by Cheapflights users on 4/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/15:35 amSEA - AEP
3 stops34h 05mMultiple Airlines
Sun 6/88:10 pmAEP - SEA
3 stops30h 03mMultiple Airlines
Deal found 4/17$1,087
This American Airlines deal was found by Cheapflights users on 4/16. 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.
Sun 11/161:33 amSEA - EZE
1 stop26h 37mAmerican Airlines
Tue 12/210:30 pmEZE - SEA
1 stop19h 08mAmerican Airlines
Deal found 4/16$1,089
This LATAM Airlines deal was found by Cheapflights users on 4/17. 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 11/511:50 amSEA - EZE
2 stops25h 55mLATAM Airlines
Sat 11/157:00 pmEZE - SEA
2 stops24h 27mLATAM Airlines
Deal found 4/17$1,115
This Air Canada deal was found by Cheapflights users on 4/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/127:15 pmSEA - EZE
3 stops39h 15mAir Canada
Wed 5/214:35 pmEZE - SEA
2 stops22h 10mAir Canada
Deal found 4/15$1,119
This United Airlines deal was found by Cheapflights users on 4/16. 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 11/175:00 pmSEA - EZE
2 stops33h 20mUnited Airlines
Tue 12/211:55 pmEZE - SEA
3 stops25h 59mUnited Airlines
Deal found 4/16$1,130
This oojo deal was found by Cheapflights users on 4/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1111:54 pmSEA - EZE
2 stops35h 26mAvianca
Thu 9/184:45 pmEZE - SEA
2 stops33h 43mAvianca
Deal found 4/16$1,162
This Aeromexico deal was found by Cheapflights users on 4/16. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/99:30 amSEA - EZE
1 stop31h 55mAeromexico
Wed 9/1711:25 pmEZE - SEA
1 stop24h 35mAeromexico
Deal found 4/16$1,169
This Air Canada deal was found by Cheapflights users on 4/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1811:35 amSEA - AEP
2 stops24h 35mAir Canada
Thu 1/11:35 pmAEP - SEA
2 stops26h 05mAir Canada
Deal found 4/17$2,704

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 April 17, 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

Thu 9/11

5:30 pm-10:08 pm

2 stops24h 38m

Buenos Aires Ministro Pistarini

Wed 9/17

12:06 am-10:36 pm

2 stops26h 30m

$1,028

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sun 6/1

5:35 am-6:12 pm

3 stops32h 37m

Buenos Aires Ministro Pistarini

Sun 6/8

7:30 am-12:58 pm

3 stops33h 28m

$1,029

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Sun 6/1

5:35 am-7:40 pm

3 stops34h 05m

Buenos Aires Jorge Newbery

Sun 6/8

8:10 pm-10:13 pm

3 stops30h 03m

$1,087

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 5/12

7:15 pm-2:30 pm

3 stops39h 15m

Buenos Aires Ministro Pistarini

Wed 5/21

4:35 pm-10:45 am

2 stops22h 10m

$1,119

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Thu 9/11

11:54 pm-3:20 pm

2 stops35h 26m

Buenos Aires Ministro Pistarini

Thu 9/18

4:45 pm-10:28 pm

2 stops33h 43m

$1,162

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 9/9

9:30 am-9:25 pm

1 stop31h 55m

Buenos Aires Ministro Pistarini

Tue 9/16

11:25 pm-8:00 pm

1 stop24h 35m

$1,169

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 9/10

1:45 pm-9:45 am

1 stop16h 00m

Buenos Aires Ministro Pistarini

Thu 9/18

8:10 pm-2:52 pm

1 stop22h 42m

$1,175

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Sun 8/17

8:00 am-4:00 pm

2 stops28h 00m

Buenos Aires Jorge Newbery

Sun 9/7

8:10 pm-10:00 pm

2 stops29h 50m

$1,175

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 9/8

7:05 am-8:00 am

1 stop20h 55m

Buenos Aires Ministro Pistarini

Tue 9/16

9:00 pm-3:54 pm

2 stops22h 54m

$1,180

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sun 8/24

8:00 am-11:57 am

2 stops23h 57m

Buenos Aires Ministro Pistarini

Sun 9/7

12:48 pm-10:00 pm

2 stops37h 12m

$1,229

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 19 results
1
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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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Buenos Aires flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 April 11, 2025.

Booking 11 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, April is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of $795). Flying from Seattle to Buenos Aires in December is currently the most expensive (average of $1,260). 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 April 17, 2025.

It’s optimal to fly from Seattle to Buenos Aires in the afternoon. By choosing this option you can save up to 10% on the cost of your flight, compared to a flight at noon.

Rainfall in Buenos Aires by month

Plan your trip to Buenos Aires by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Buenos Aires ranges from 2.0 - 3.9 inches per month. January is typically the wettest month, when rainfall can reach 3.9 in. June is typically the driest time to visit Buenos Aires when rainfall is around 2.0 in.

Temperature in Buenos Aires by month

Plan your trip to Buenos Aires by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Buenos Aires, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 51.8 F).

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 April 17, 2025.
To help decide which airline to fly from Seattle to Buenos Aires, see what other customers have to say about Delta, Copa Airlines and LATAM Airlines. 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
8.0
Very good
7,916 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,916 reviews
Delta
8.0
Very good
7,916 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Copa Airlines
7.6
Good
1,409 reviews
Delta
8.0
Very good
7,916 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
LATAM Airlines
7.5
Good
1,761 reviews
Delta
8.0
Very good
7,916 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aeromexico
7.5
Good
1,699 reviews
Delta
8.0
Very good
7,916 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,916 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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 $1,028. Other airlines that can offer you cheap pricing are Air Canada, from $1,119, and Avianca, from $1,162. You may be able to fly from Seattle to Buenos Aires for 26% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Seattle to Buenos Aires one-way?

    The cheapest airlines for a one-way flight from Seattle to Buenos Aires are Copa Airlines ($541), Air Canada ($563), and Delta ($748).

  • 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, April is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of $795). Flying from Seattle to Buenos Aires in December is currently the most expensive (average of $1,260). 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 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$1,100Average$1,366FlexibilityNo cancel feeOn-time71%
LATAM AirlinesCheapest$1,113Average$1,260FlexibilityNo cancel feeOn-time81%
DeltaCheapest$1,113Average$1,447FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,200Average$1,375FlexibilityNo cancel feeOn-time69%

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