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Cheap flights from Seattle to Buenos Aires from C$ 1,141

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 27/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BUE
18 May — 25 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Buenos Aires

Enter your travel dates to find the best prices.

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 18 April 2026.

Tue 6/108:25 a.m.
SEA
-
EZE
1 stop20h 55m
Delta
Tue 27/107:45 a.m.
EZE
-
SEA
2 stops36h 48m
Delta
Deal found 17/4C$ 1,323
Wed 21/108:25 a.m.
SEA
-
AEP
2 stops26h 25m
Delta
Mon 9/118:05 p.m.
AEP
-
SEA
2 stops29h 41m
Delta
Deal found 17/4C$ 1,323
Thu 22/107:50 a.m.
SEA
-
EZE
2 stops21h 30m
Delta
Tue 10/114:45 p.m.
EZE
-
SEA
2 stops25h 15m
Delta
Deal found 17/4C$ 1,328
Sun 11/1011:59 p.m.
SEA
-
EZE
1 stop28h 01m
United Airlines
Thu 22/109:00 p.m.
EZE
-
SEA
1 stop19h 47m
United Airlines
Deal found 17/4C$ 1,341
Fri 23/109:25 p.m.
SEA
-
EZE
2 stops28h 45m
Delta
Mon 9/113:55 a.m.
EZE
-
SEA
2 stops25h 23m
Delta
Deal found 17/4C$ 1,405
Sat 24/108:25 a.m.
SEA
-
AEP
2 stops27h 35m
Delta
Tue 10/118:05 p.m.
AEP
-
SEA
2 stops30h 53m
Delta
Deal found 17/4C$ 1,405
Tue 20/109:25 p.m.
SEA
-
EZE
2 stops28h 45m
Delta
Fri 6/117:45 a.m.
EZE
-
SEA
2 stops34h 15m
Delta
Deal found 17/4C$ 1,473
Thu 22/107:20 a.m.
SEA
-
AEP
2 stops27h 30m
Delta
Fri 6/119:05 p.m.
AEP
-
SEA
2 stops30h 07m
Delta
Deal found 17/4C$ 1,473
Fri 9/108:25 a.m.
SEA
-
EZE
1 stop20h 55m
Delta
Fri 23/108:10 p.m.
EZE
-
SEA
1 stop26h 49m
Delta
Deal found 17/4C$ 1,487
Fri 23/102:30 p.m.
SEA
-
AEP
2 stops21h 30m
Delta
Thu 5/118:05 p.m.
AEP
-
SEA
2 stops21h 55m
Delta
Deal found 17/4C$ 1,487
Wed 24/67:54 p.m.
SEA
-
EZE
2 stops32h 06m
United Airlines
Wed 1/79:00 p.m.
EZE
-
SEA
2 stops24h 59m
United Airlines
Deal found 17/4C$ 1,582
Sat 10/107:20 a.m.
SEA
-
EZE
2 stops18h 50m
Delta
Mon 26/107:45 a.m.
EZE
-
SEA
2 stops35h 02m
Delta
Deal found 17/4C$ 1,605

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 18 April 2026.

Round-trip from

C$ 1,323

One-way from

C$ 1,141

Popular in

May

Cheapest in

March

Average price

C$ 1,816
Delta
  • Delta
  • 6/10-28/10
  • 4 total stops
  • 62h 25m total
  • Seattle to Buenos Aires
Search Deals
United Airlines
  • United Airlines
  • 27/7
  • 2 total stops
  • 32h 55m total
  • Seattle to Buenos Aires
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 84 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease (C$ 24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 629,999 searches. Data last updated 18 April 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

Cheapest round-trip

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Tue 6/10

8:25 a.m.-9:40 a.m.

2 stops21h 15m

Buenos Aires Jorge Newbery

Tue 27/10

8:05 p.m.-4:33 p.m.

2 stops24h 28m

C$ 1,323

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Fri 9/10

11:50 a.m.-9:20 a.m.

2 stops17h 30m

Buenos Aires Ministro Pistarini

Fri 23/10

8:10 p.m.-2:50 p.m.

1 stop22h 40m

C$ 1,493

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 24/6

5:00 p.m.-8:00 a.m.

1 stop35h 00m

Buenos Aires Ministro Pistarini

Wed 1/7

9:00 p.m.-3:55 p.m.

2 stops22h 55m

C$ 1,602

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Fri 9/10

9:25 p.m.-7:40 a.m.

2 stops30h 15m

Buenos Aires Jorge Newbery

Mon 26/10

8:05 p.m.-2:47 p.m.

2 stops22h 42m

C$ 1,673

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Fri 9/10

9:25 p.m.-7:40 a.m.

2 stops30h 15m

Buenos Aires Jorge Newbery

Tue 27/10

8:05 p.m.-2:47 p.m.

2 stops22h 42m

C$ 1,673

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Fri 9/10

9:25 p.m.-7:40 a.m.

2 stops30h 15m

Buenos Aires Jorge Newbery

Wed 28/10

8:05 p.m.-10:11 p.m.

2 stops30h 06m

C$ 1,673
Quickest round-trip

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Thu 8/10

8:25 a.m.-9:20 a.m.

1 stop20h 55m

Buenos Aires Ministro Pistarini

Sat 24/10

8:10 p.m.-10:26 a.m.

1 stop18h 16m

C$ 1,740

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Thu 4/6

5:00 a.m.-8:00 a.m.

2 stops23h 00m

Buenos Aires Ministro Pistarini

Mon 8/6

9:00 p.m.-12:34 p.m.

1 stop19h 34m

C$ 1,857

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sun 6/9

5:30 p.m.-9:45 a.m.

1 stop36h 15m

Buenos Aires Ministro Pistarini

Sat 26/9

8:10 p.m.-10:05 a.m.

1 stop17h 55m

C$ 1,868

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 3/8

7:54 p.m.-8:00 a.m.

2 stops32h 06m

Buenos Aires Ministro Pistarini

Mon 24/8

9:00 p.m.-12:23 p.m.

2 stops19h 23m

C$ 1,869

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/4

Showing 1-10 of 19 resultsSorted by cheapest first
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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 10 April 2026.

To ensure you get the cheapest price possible for a flight from Seattle to Buenos Aires, you should look to book at least 25 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of C$ 215). Flying from Seattle to Buenos Aires in May is currently the most expensive (average of C$ 1,795). 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 much does it cost to fly round-trip from Seattle to Buenos Aires?

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.

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 0 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

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

    For as low as C$ 1,323, Delta can have you in Buenos Aires from Seattle in 20h 55m. Seattle and Buenos Aires are separated by a distance of 11122 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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, August is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of C$ 215). Flying from Seattle to Buenos Aires in May is currently the most expensive (average of C$ 1,795). 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

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