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Cheap flights from Seattle to Buenos Aires from C$ 730

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 22/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BUE
4 Dec — 11 Dec1
1 adult
1 adult, Economy, 0 bags

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 4 November 2025.

Round-trip from

C$ 1,355

One-way from

C$ 730

Popular in

December

Cheapest in

May

Average price

C$ 1,885
United Airlines
  • United Airlines
  • 15/1-22/1
  • 2 total stops
  • 33h 34m total
  • Seattle to Buenos Aires
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Copa Airlines
  • Copa Airlines
  • 22/1
  • 2 total stops
  • 25h 28m total
  • Seattle to Buenos Aires
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Highest demand for flights based on searches. 4% potential increase in price (C$ 136 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 43 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

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 4 November 2025.

Mon 17/117:10 a.m.SEA - EZE
1 stop19h 10mUnited Airlines
Mon 1/1211:55 p.m.EZE - SEA
1 stop24h 27mUnited Airlines
Deal found 3/11C$ 1,355
Tue 9/129:05 a.m.SEA - EZE
2 stops19h 15mUnited Airlines
Thu 18/1211:55 p.m.EZE - SEA
2 stops27h 42mUnited Airlines
Deal found 3/11C$ 1,360
Sun 30/1111:59 p.m.SEA - EZE
1 stop26h 21mUnited Airlines
Tue 9/1211:55 p.m.EZE - SEA
1 stop24h 27mUnited Airlines
Deal found 3/11C$ 1,373
Thu 20/116:00 a.m.SEA - EZE
2 stops38h 00mDelta
Mon 1/1211:55 p.m.EZE - SEA
1 stop39h 25mDelta
Deal found 3/11C$ 1,374
Sun 7/121:46 p.m.SEA - EZE
1 stop36h 34mUnited Airlines
Thu 18/1211:55 p.m.EZE - SEA
1 stop27h 57mUnited Airlines
Deal found 4/11C$ 1,391
Sun 16/113:42 p.m.SEA - EZE
1 stop36h 18mDelta
Mon 1/1211:55 p.m.EZE - SEA
1 stop39h 25mDelta
Deal found 3/11C$ 1,394
Fri 21/1111:40 a.m.SEA - EZE
1 stop16h 20mDelta
Thu 27/1110:25 p.m.EZE - SEA
1 stop21h 04mDelta
Deal found 3/11C$ 1,425
Thu 20/1111:27 a.m.SEA - EZE
1 stop17h 48mDelta
Thu 27/1110:25 p.m.EZE - SEA
1 stop21h 04mDelta
Deal found 3/11C$ 1,426
Fri 5/126:00 a.m.SEA - EZE
2 stops23h 15mDelta
Thu 18/1210:25 p.m.EZE - SEA
2 stops23h 35mDelta
Deal found 3/11C$ 1,430
Thu 20/118:42 a.m.SEA - AEP
2 stops23h 58mDelta
Sat 29/118:00 p.m.AEP - SEA
2 stops21h 43mDelta
Deal found 3/11C$ 26,624
Wed 17/1211:40 a.m.SEA - AEP
2 stops21h 00mDelta
Sun 4/16:35 p.m.AEP - SEA
2 stops24h 43mDelta
Deal found 3/11C$ 29,431

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 4 November 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 15/1

12:40 p.m.-9:20 a.m.

1 stop15h 40m

Buenos Aires Ministro Pistarini

Thu 22/1

11:55 p.m.-12:49 p.m.

1 stop17h 54m

C$ 1,355

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 18/11

11:27 a.m.-10:15 a.m.

1 stop17h 48m

Buenos Aires Ministro Pistarini

Thu 27/11

8:55 p.m.-12:43 p.m.

1 stop20h 48m

C$ 1,355

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 19/11

7:10 a.m.-7:20 a.m.

1 stop19h 10m

Buenos Aires Ministro Pistarini

Wed 26/11

11:55 p.m.-12:47 p.m.

1 stop17h 52m

C$ 1,355

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 12/1

12:40 p.m.-9:20 a.m.

1 stop15h 40m

Buenos Aires Ministro Pistarini

Wed 21/1

11:55 p.m.-12:49 p.m.

1 stop17h 54m

C$ 1,355

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 17/11

7:10 a.m.-7:20 a.m.

1 stop19h 10m

Buenos Aires Ministro Pistarini

Tue 25/11

11:55 p.m.-7:25 p.m.

1 stop24h 30m

C$ 1,355

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Thu 11/12

7:10 a.m.-9:20 a.m.

1 stop21h 10m

Buenos Aires Ministro Pistarini

Mon 15/12

11:55 p.m.-12:42 p.m.

1 stop17h 47m

C$ 1,355

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 26/1

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

1 stop16h 00m

Buenos Aires Ministro Pistarini

Tue 10/3

10:25 p.m.-6:32 p.m.

2 stops24h 07m

C$ 1,360

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Thu 27/11

9:28 a.m.-10:15 a.m.

2 stops19h 47m

Buenos Aires Ministro Pistarini

Thu 18/12

10:25 p.m.-2:59 p.m.

2 stops21h 34m

C$ 1,360

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 17/11

8:36 a.m.-7:20 a.m.

2 stops17h 44m

Buenos Aires Ministro Pistarini

Mon 1/12

11:55 p.m.-9:46 p.m.

2 stops26h 51m

C$ 1,360

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sun 30/11

11:59 p.m.-9:20 a.m.

1 stop28h 21m

Buenos Aires Ministro Pistarini

Tue 9/12

10:05 p.m.-1:47 p.m.

2 stops20h 42m

C$ 1,378

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 23 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 31 October 2025.

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, June is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of C$ 1,042). Flying from Seattle to Buenos Aires in October is currently the most expensive (average of C$ 1,729). 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?

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$ 1,355, United Airlines can have you in Buenos Aires from Seattle in 18h 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, June is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of C$ 1,042). Flying from Seattle to Buenos Aires in October is currently the most expensive (average of C$ 1,729). 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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Why should you use Cheapflights to find cheap flight tickets from Seattle to Buenos Aires?

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