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Cheap flights from Seattle to Buenos Aires from C$ 576

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 31/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BUE
17 Jan — 24 Jan1
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 December 2025.

Sun 28/1211:59 p.m.SEA - EZE
2 stops26h 21mUnited Airlines
Sat 17/111:55 p.m.EZE - SEA
2 stops20h 49mUnited Airlines
Deal found 16/12C$ 1,988
Sun 28/128:19 a.m.SEA - EZE
1 stop20h 16mMultiple Airlines
Sat 17/17:30 a.m.EZE - SEA
2 stops32h 16mMultiple Airlines
Deal found 16/12C$ 2,020
Sat 20/125:05 p.m.SEA - EZE
2 stops33h 15mUnited Airlines
Mon 2/210:05 p.m.EZE - SEA
3 stops28h 07mUnited Airlines
Deal found 16/12C$ 2,032
Wed 17/128:40 a.m.SEA - EZE
2 stops19h 40mUnited Airlines
Wed 24/1211:55 p.m.EZE - SEA
1 stop17h 54mUnited Airlines
Deal found 16/12C$ 2,133
Fri 19/125:02 a.m.SEA - EZE
2 stops23h 18mUnited Airlines
Wed 14/111:55 p.m.EZE - SEA
2 stops30h 04mUnited Airlines
Deal found 16/12C$ 2,258
Fri 19/126:45 a.m.SEA - EZE
1 stop19h 35mUnited Airlines
Sun 21/1210:05 p.m.EZE - SEA
1 stop19h 42mUnited Airlines
Deal found 16/12C$ 2,309
Sat 20/125:05 p.m.SEA - EZE
2 stops33h 15mUnited Airlines
Mon 22/1211:55 p.m.EZE - SEA
2 stops23h 11mUnited Airlines
Deal found 16/12C$ 2,422
Sun 28/1211:38 p.m.SEA - AEP
2 stops25h 02mMultiple Airlines
Sat 17/15:15 p.m.AEP - SEA
2 stops24h 42mMultiple Airlines
Deal found 16/12C$ 3,422
Thu 18/127:25 a.m.SEA - AEP
2 stops23h 55mDelta
Mon 29/126:20 a.m.AEP - SEA
2 stops22h 38mDelta
Deal found 15/12C$ 28,886

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 December 2025.

Round-trip from

C$ 1,441

One-way from

C$ 576

Popular in

December

Cheapest in

June

Average price

C$ 2,005
Delta
  • Delta
  • 2/2-22/2
  • 3 total stops
  • 38h 55m total
  • Seattle to Buenos Aires
Search Deals
31/1
  • 31/1
  • 3 total stops
  • 37h 39m total
  • Seattle to Buenos Aires
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 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

Mon 2/2

11:55 a.m.-9:00 a.m.

1 stop16h 05m

Buenos Aires Ministro Pistarini

Sun 22/2

4:05 a.m.-9:55 p.m.

2 stops22h 50m

C$ 1,441

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sun 5/4

11:30 p.m.-3:45 p.m.

2 stops36h 15m

Buenos Aires Ministro Pistarini

Wed 15/4

7:45 a.m.-12:16 p.m.

2 stops32h 31m

C$ 1,455

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 17/2

7:10 a.m.-10:15 a.m.

1 stop22h 05m

Buenos Aires Ministro Pistarini

Thu 26/2

11:55 p.m.-6:43 p.m.

1 stop23h 48m

C$ 1,455

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 17/2

3:16 p.m.-7:20 a.m.

2 stops35h 04m

Buenos Aires Ministro Pistarini

Thu 26/2

11:55 p.m.-1:24 p.m.

1 stop18h 29m

C$ 1,460

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Fri 3/4

2:16 p.m.-8:00 a.m.

2 stops37h 44m

Buenos Aires Ministro Pistarini

Wed 15/4

9:00 p.m.-1:14 p.m.

2 stops44h 14m

C$ 1,536

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Tue 17/2

5:50 p.m.-4:00 p.m.

2 stops41h 10m

Buenos Aires Jorge Newbery

Thu 26/2

2:55 p.m.-6:52 p.m.

2 stops32h 57m

C$ 1,551

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sat 14/2

11:59 p.m.-7:20 a.m.

2 stops26h 21m

Buenos Aires Ministro Pistarini

Sat 21/2

11:55 p.m.-1:24 p.m.

1 stop18h 29m

C$ 1,571

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sun 1/2

12:57 p.m.-9:20 a.m.

1 stop15h 23m

Buenos Aires Ministro Pistarini

Mon 23/2

10:05 p.m.-6:03 p.m.

2 stops24h 58m

C$ 1,634

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Sun 1/2

7:00 a.m.-9:20 a.m.

1 stop21h 20m

Buenos Aires Ministro Pistarini

Tue 24/2

10:05 p.m.-1:24 p.m.

1 stop20h 19m

C$ 1,634

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Tue 17/2

1:45 p.m.-6:40 p.m.

2 stops23h 55m

Buenos Aires Jorge Newbery

Thu 26/2

12:40 p.m.-2:44 p.m.

3 stops31h 04m

C$ 2,189

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/12

Showing 1-10 of 24 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 12 December 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$ 952). Flying from Seattle to Buenos Aires in October is currently the most expensive (average of C$ 1,691). 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.

Which airline has the best punctuality record on Seattle to Buenos Aires flights?

Over the past year, Aerolineas Argentinas has had the lowest number of delays on this route, with just 100% of flights being delayed.

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$ 1,441, Delta can have you in Buenos Aires from Seattle in 16h 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, June is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of C$ 952). Flying from Seattle to Buenos Aires in October is currently the most expensive (average of C$ 1,691). 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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Fly with Cheapflights

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How does Cheapflights help users find flights from Seattle to Buenos Aires?

Cheapflights helps you search for flights from Seattle to Buenos Aires via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Buenos Aires?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Buenos Aires for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Buenos Aires with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Buenos Aires flexibly with Cheapflights today.

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