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$396+ 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BUE
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 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 June 12, 2025.

Round-trip from

$1,028
(Copa Airlines)

One-way from

$396
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$1,311
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 ($68 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Copa Airlines deal was found by Cheapflights users on 6/10. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/307:28 pmSEA - EZE
2 stops22h 31mCopa Airlines
Sat 11/112:49 amEZE - SEA
2 stops27h 21mCopa Airlines
Deal found 6/10$1,028
This Rumbo deal was found by Cheapflights users on 6/9. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:15 amSEA - EZE
2 stops27h 15mAir Canada
Mon 9/224:35 pmEZE - SEA
2 stops30h 56mAir Canada
Deal found 6/9$1,029
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2610:00 pmSEA - EZE
2 stops22h 50mLATAM Airlines
Sun 11/97:35 pmEZE - SEA
2 stops23h 52mLATAM Airlines
Deal found 6/11$1,148
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/247:20 amSEA - EZE
3 stops27h 10mMultiple Airlines
Sat 9/61:40 amEZE - SEA
2 stops37h 19mMultiple Airlines
Deal found 6/11$1,153
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/131:30 pmSEA - AEP
2 stops22h 35mLATAM Airlines
Wed 8/278:10 pmAEP - SEA
2 stops22h 28mLATAM Airlines
Deal found 6/10$1,157
This Delta deal was found by Cheapflights users on 6/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1812:00 pmSEA - EZE
2 stops25h 45mDelta
Mon 12/110:25 pmEZE - SEA
1 stop26h 04mDelta
Deal found 6/9$1,195
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Wed 11/125:05 amSEA - EZE
2 stops21h 15mUnited Airlines
Tue 12/211:55 pmEZE - SEA
3 stops25h 59mUnited Airlines
Deal found 6/9$1,200
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/21:33 amSEA - EZE
1 stop26h 37mAmerican Airlines
Wed 11/1910:30 pmEZE - SEA
1 stop17h 04mAmerican Airlines
Deal found 6/11$1,210
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:30 amSEA - AEP
2 stops34h 50mMultiple Airlines
Sat 11/293:40 pmAEP - SEA
2 stops35h 16mMultiple Airlines
Deal found 6/11$1,334
This Aeromexico deal was found by Cheapflights users on 6/10. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/167:20 amSEA - EZE
1 stop34h 05mAeromexico
Sat 8/3011:25 pmEZE - SEA
1 stop24h 35mAeromexico
Deal found 6/10$1,344
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/612:05 pmSEA - AEP
2 stops25h 15mAir Canada
Fri 7/111:40 pmAEP - SEA
2 stops25h 20mAir Canada
Deal found 6/11$1,963
This KAYAK deal was found by Cheapflights users on 6/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/108:08 pmSEA - AEP
2 stops36h 52mGOL
Tue 8/193:40 amAEP - SEA
2 stops24h 34mGOL
Deal found 6/12$2,731

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 June 12, 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 10/30

7:28 pm-9:59 pm

2 stops22h 31m

Buenos Aires Ministro Pistarini

Sat 11/1

12:49 am-12:10 am

2 stops27h 21m

$1,028

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 9/9

7:15 am-2:30 pm

2 stops27h 15m

Buenos Aires Ministro Pistarini

Mon 9/22

4:35 pm-7:31 pm

2 stops30h 56m

$1,029

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sun 10/26

10:00 pm-12:50 am

2 stops22h 50m

Buenos Aires Ministro Pistarini

Sun 11/9

7:35 pm-2:27 pm

2 stops23h 52m

$1,148

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sun 8/24

7:20 am-2:30 pm

3 stops27h 10m

Buenos Aires Ministro Pistarini

Sat 9/6

1:40 am-10:59 am

2 stops37h 19m

$1,153

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Wed 8/13

1:30 pm-4:05 pm

2 stops22h 35m

Buenos Aires Jorge Newbery

Wed 8/27

8:10 pm-2:38 pm

2 stops22h 28m

$1,157

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 11/18

12:00 pm-6:45 pm

2 stops25h 45m

Buenos Aires Ministro Pistarini

Mon 12/1

10:25 pm-7:29 pm

1 stop26h 04m

$1,195

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 11/12

5:05 am-7:20 am

2 stops21h 15m

Buenos Aires Ministro Pistarini

Tue 12/2

11:55 pm-8:54 pm

3 stops25h 59m

$1,200

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sun 11/2

1:33 am-9:10 am

1 stop26h 37m

Buenos Aires Ministro Pistarini

Wed 11/19

10:30 pm-10:34 am

1 stop17h 04m

$1,210

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Sun 11/16

7:30 am-11:20 pm

2 stops34h 50m

Buenos Aires Jorge Newbery

Sat 11/29

3:40 pm-9:56 pm

2 stops35h 16m

$1,334

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sat 8/16

7:20 am-9:25 pm

1 stop34h 05m

Buenos Aires Ministro Pistarini

Sat 8/30

11:25 pm-8:00 pm

1 stop24h 35m

$1,344

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 21 results
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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 June 9, 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, 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 June 12, 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 June 12, 2025.
To help decide which airline to fly from Seattle to Buenos Aires, see what other customers have to say about Delta, LATAM Airlines and Copa 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
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
LATAM Airlines
7.5
Good
1,785 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Copa Airlines
7.5
Good
1,451 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Aeromexico
7.5
Good
1,706 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $1,029, and LATAM Airlines, from $1,148. You may be able to fly from Seattle to Buenos Aires for 24% 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 Air Canada ($513), Copa Airlines ($603), and United Airlines ($757).

  • 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

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

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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$1,100Average$1,311FlexibilityNo cancel feeOn-time71%
LATAM AirlinesCheapest$1,113Average$1,208FlexibilityNo cancel feeOn-time81%
DeltaCheapest$1,113Average$1,422FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,200Average$1,336FlexibilityNo cancel feeOn-time69%

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