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Cheap flights from Seattle to Buenos Aires from C$ 949

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 16/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BUE
29 Mar — 5 Apr1
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 27 February 2026.

Sat 31/105:30 p.m.
SEA
-
EZE
2 stops25h 04m
Copa Airlines
Tue 24/112:27 a.m.
EZE
-
SEA
2 stops27h 06m
Copa Airlines
Deal found 23/2C$ 1,476
Mon 20/41:45 p.m.
SEA
-
EZE
1 stop16h 00m
Delta
Wed 6/51:10 p.m.
EZE
-
SEA
1 stop36h 45m
Delta
Deal found 25/2C$ 1,485
Thu 30/46:58 p.m.
SEA
-
EZE
2 stops27h 32m
Copa Airlines
Mon 11/59:02 a.m.
EZE
-
SEA
2 stops30h 35m
Copa Airlines
Deal found 27/2C$ 1,492
Thu 16/46:30 a.m.
SEA
-
EZE
1 stop21h 30m
United Airlines
Thu 23/49:00 p.m.
EZE
-
SEA
1 stop26h 42m
United Airlines
Deal found 24/2C$ 1,500
Sun 1/1111:35 p.m.
SEA
-
EZE
2 stops29h 05m
Delta
Thu 26/1111:55 p.m.
EZE
-
SEA
1 stop19h 55m
Delta
Deal found 23/2C$ 1,506
Sun 19/44:32 p.m.
SEA
-
EZE
2 stops29h 58m
Copa Airlines
Sun 26/42:57 p.m.
EZE
-
SEA
2 stops32h 48m
Copa Airlines
Deal found 24/2C$ 1,517
Fri 27/36:45 a.m.
SEA
-
EZE
1 stop19h 35m
United Airlines
Thu 16/49:00 p.m.
EZE
-
SEA
1 stop26h 42m
United Airlines
Deal found 24/2C$ 1,535
Fri 30/107:03 a.m.
SEA
-
EZE
1 stop19h 17m
United Airlines
Thu 26/1111:55 p.m.
EZE
-
SEA
1 stop17h 50m
United Airlines
Deal found 23/2C$ 1,555
Mon 10/85:45 p.m.
SEA
-
EZE
2 stops21h 05m
Delta
Sun 30/88:10 p.m.
EZE
-
SEA
1 stop17h 55m
Delta
Deal found 25/2C$ 1,561
Sun 19/411:35 p.m.
SEA
-
EZE
1 stop28h 25m
United Airlines
Sun 26/49:00 p.m.
EZE
-
SEA
1 stop26h 42m
United Airlines
Deal found 24/2C$ 1,574
Thu 27/87:50 a.m.
SEA
-
EZE
1 stop21h 55m
Delta
Mon 31/88:10 p.m.
EZE
-
SEA
1 stop17h 55m
Delta
Deal found 25/2C$ 1,583
Sat 8/88:40 a.m.
SEA
-
AEP
2 stops21h 10m
Delta
Fri 28/83:45 p.m.
AEP
-
SEA
2 stops24h 26m
Delta
Deal found 25/2C$ 6,121

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 27 February 2026.

Round-trip from

C$ 1,476

One-way from

C$ 949

Popular in

April

Cheapest in

June

Average price

C$ 1,778
Copa Airlines
  • Copa Airlines
  • 16/4-22/4
  • 4 total stops
  • 57h 40m total
  • Seattle to Buenos Aires
Search Deals
United Airlines
  • United Airlines
  • 16/3
  • 2 total stops
  • 19h 35m total
  • Seattle to Buenos Aires
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 27 February 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

Thu 16/4

6:00 a.m.-7:55 a.m.

2 stops21h 55m

Buenos Aires Ministro Pistarini

Wed 22/4

3:52 a.m.-11:37 a.m.

2 stops35h 45m

C$ 1,476

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 15/4

3:48 p.m.-12:50 a.m.

2 stops29h 02m

Buenos Aires Ministro Pistarini

Sat 30/5

5:25 a.m.-1:13 a.m.

2 stops23h 48m

C$ 1,476

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 10/8

5:45 p.m.-6:50 p.m.

2 stops21h 05m

Buenos Aires Ministro Pistarini

Sun 30/8

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

1 stop17h 55m

C$ 1,561

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sun 19/4

11:35 p.m.-8:00 a.m.

1 stop28h 25m

Buenos Aires Ministro Pistarini

Sun 26/4

9:00 p.m.-7:42 p.m.

1 stop26h 42m

C$ 1,574

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 1/4

6:30 a.m.-8:00 a.m.

1 stop21h 30m

Buenos Aires Ministro Pistarini

Wed 22/4

9:00 p.m.-12:47 p.m.

1 stop19h 47m

C$ 1,644

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 13/4

6:30 a.m.-8:00 a.m.

1 stop21h 30m

Buenos Aires Ministro Pistarini

Mon 27/4

9:00 p.m.-7:42 p.m.

1 stop26h 42m

C$ 1,644

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 7/4

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

2 stops23h 00m

Buenos Aires Ministro Pistarini

Tue 21/4

9:00 p.m.-12:47 p.m.

1 stop19h 47m

C$ 1,650

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 6/4

6:30 a.m.-8:00 a.m.

1 stop21h 30m

Buenos Aires Ministro Pistarini

Fri 24/4

9:00 p.m.-9:06 p.m.

2 stops28h 06m

C$ 1,704

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 15/4

8:55 a.m.-8:00 a.m.

2 stops19h 05m

Buenos Aires Ministro Pistarini

Sat 25/4

9:00 p.m.-10:33 p.m.

2 stops29h 33m

C$ 1,719

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Mon 10/8

11:50 a.m.-12:20 p.m.

2 stops20h 30m

Buenos Aires Jorge Newbery

Sun 30/8

3:45 p.m.-12:11 p.m.

2 stops24h 26m

C$ 6,121

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/2

Showing 1-10 of 26 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 20 February 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, March is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of C$ 217). Flying from Seattle to Buenos Aires in February is currently the most expensive (average of C$ 1,660). 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.

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$ 1,561, Copa Airlines can have you in Buenos Aires from Seattle in 21h 05m. 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, March is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of C$ 217). Flying from Seattle to Buenos Aires in February is currently the most expensive (average of C$ 1,660). 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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