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Cheap flights from Seattle to Buenos Aires from C$ 613

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 15/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BUE
16 Oct — 23 Oct1
1 adult
1 adult, Economy

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 16 September 2025.

Round-trip from

C$ 1,504

One-way from

C$ 613

Popular in

December

Cheapest in

June

Average price

C$ 1,796
Copa Airlines
  • Copa Airlines
  • 8/10-18/10
  • 4 total stops
  • 48h 09m total
  • Seattle to Buenos Aires
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Copa Airlines
  • Copa Airlines
  • 11/11
  • 2 total stops
  • 26h 40m total
  • Seattle to Buenos Aires
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Highest demand for flights based on searches. 4% potential increase in price (C$ 128 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 46 potential savings vs. average RT price).
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Average for round-trip flights in September 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 16 September 2025.

Wed 8/105:31 p.m.SEA - EZE
2 stops27h 24mCopa Airlines
Sat 18/105:08 a.m.EZE - SEA
2 stops20h 45mCopa Airlines
Deal found 15/9C$ 1,504
Sat 11/107:37 p.m.SEA - EZE
2 stops28h 42mCopa Airlines
Sat 18/105:08 a.m.EZE - SEA
2 stops20h 45mCopa Airlines
Deal found 14/9C$ 1,616
Mon 24/1111:00 p.m.SEA - EZE
2 stops26h 20mDelta
Tue 16/1211:55 p.m.EZE - SEA
1 stop19h 46mDelta
Deal found 15/9C$ 1,623
Sun 23/1111:55 p.m.SEA - EZE
2 stops29h 20mDelta
Thu 18/1210:25 p.m.EZE - SEA
1 stop28h 56mDelta
Deal found 13/9C$ 1,630
Sun 30/1111:59 p.m.SEA - EZE
1 stop26h 21mUnited Airlines
Wed 17/1211:55 p.m.EZE - SEA
1 stop24h 49mUnited Airlines
Deal found 16/9C$ 1,645
Sun 30/1111:00 p.m.SEA - EZE
1 stop29h 00mDelta
Thu 18/128:00 a.m.EZE - SEA
2 stops20h 58mDelta
Deal found 15/9C$ 1,647
Sat 25/105:31 p.m.SEA - EZE
2 stops34h 23mCopa Airlines
Thu 6/112:15 a.m.EZE - SEA
2 stops25h 55mCopa Airlines
Deal found 15/9C$ 1,648
Thu 27/115:05 a.m.SEA - EZE
2 stops21h 15mUnited Airlines
Thu 18/1211:55 p.m.EZE - SEA
1 stop29h 39mUnited Airlines
Deal found 15/9C$ 1,651
Sat 29/116:00 a.m.SEA - EZE
2 stops19h 20mDelta
Mon 15/1211:55 p.m.EZE - SEA
1 stop19h 46mDelta
Deal found 15/9C$ 1,658
Wed 5/115:00 a.m.SEA - EZE
2 stops21h 20mUnited Airlines
Sat 15/1111:55 p.m.EZE - SEA
3 stops25h 56mUnited Airlines
Deal found 15/9C$ 1,665
Mon 24/1111:59 p.m.SEA - EZE
1 stop28h 21mUnited Airlines
Thu 18/1211:55 p.m.EZE - SEA
1 stop29h 39mUnited Airlines
Deal found 15/9C$ 1,666
Sat 22/1111:59 p.m.SEA - EZE
1 stop28h 21mUnited Airlines
Mon 1/1210:05 p.m.EZE - SEA
1 stop26h 17mUnited Airlines
Deal found 14/9C$ 1,680

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 16 September 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 27/11

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

1 stop19h 10m

Buenos Aires Ministro Pistarini

Mon 15/12

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

1 stop17h 47m

C$ 1,623

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 26/1

6:00 a.m.-9:00 a.m.

1 stop22h 00m

Buenos Aires Ministro Pistarini

Tue 10/3

4:05 a.m.-10:13 p.m.

2 stops22h 08m

C$ 1,623

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 26/11

11:36 a.m.-10:15 a.m.

1 stop17h 39m

Buenos Aires Ministro Pistarini

Mon 15/12

8:00 a.m.-12:20 a.m.

2 stops21h 20m

C$ 1,623

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 26/11

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

1 stop21h 10m

Buenos Aires Ministro Pistarini

Mon 15/12

10:05 p.m.-12:42 p.m.

1 stop19h 37m

C$ 1,623

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Tue 25/11

11:40 a.m.-9:00 a.m.

1 stop16h 20m

Buenos Aires Ministro Pistarini

Wed 17/12

8:55 p.m.-10:18 a.m.

1 stop18h 23m

C$ 1,623

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Wed 26/11

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

1 stop19h 10m

Buenos Aires Ministro Pistarini

Tue 16/12

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

1 stop17h 47m

C$ 1,623

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 24/11

11:36 a.m.-10:15 a.m.

1 stop17h 39m

Buenos Aires Ministro Pistarini

Thu 18/12

10:25 p.m.-10:21 p.m.

1 stop28h 56m

C$ 1,623

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

Mon 24/11

11:00 p.m.-6:20 a.m.

2 stops26h 20m

Buenos Aires Ministro Pistarini

Wed 17/12

8:55 p.m.-10:18 a.m.

1 stop18h 23m

C$ 1,623

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Tue 14/10

11:40 a.m.-3:40 p.m.

2 stops24h 00m

Buenos Aires Jorge Newbery

Thu 11/12

7:00 p.m.-12:40 p.m.

2 stops22h 40m

C$ 10,002

SeattleBuenos Aires

SEA - AEP

SEAAEP

Seattle/Tacoma Intl

Tue 14/10

11:40 a.m.-12:20 p.m.

2 stops20h 40m

Buenos Aires Jorge Newbery

Thu 4/12

7:40 p.m.-12:41 p.m.

2 stops22h 01m

C$ 10,002

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

Showing 1-10 of 19 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 September 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, September is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of C$ 810). Flying from Seattle to Buenos Aires in December is currently the most expensive (average of C$ 1,063). 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.

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$ 1,623, Delta can have you in Buenos Aires from Seattle in 21h 55m. Seattle and Buenos Aires are separated by a distance of 11122 km.

  • 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, September is the cheapest month in which you can book a flight from Seattle to Buenos Aires (average of C$ 810). Flying from Seattle to Buenos Aires in December is currently the most expensive (average of C$ 1,063). 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.

Other flights to Buenos Aires

Explore flights to Buenos Aires departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 16 September 2025.
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