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Cheap flights from Seattle to Buenos Aires from $400

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Buenos Aires departing on 9/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Seattle to Buenos Aires

Cheap round-trip flights

LATAM Airlines Logo
11:29 am - 12:00 pmSEA-AEP
44h 31m2 stops
LATAM Airlines Logo
8:25 pm - 2:02 pmAEP-SEA
21h 37m2 stops
$868LATAM Airlines
Find Deal
sáb., oct. 18 - sáb., nov. 1
LATAM Airlines Logo
8:00 am - 9:15 amSEA-EZE
20h 15m2 stops
LATAM Airlines Logo
7:43 pm - 1:00 pmEZE-SEA
22h 17m2 stops
$1,023LATAM Airlines
Find Deal
mar., dic. 2 - mar., dic. 9
Copa Airlines Logo
3:48 pm - 10:31 pmSEA-EZE
25h 43m2 stops
Copa Airlines Logo
5:11 am - 11:10 pmEZE-SEA
22h 59m2 stops
$1,028Copa Airlines
Find Deal
vie., nov. 7 - jue., nov. 20
Copa Airlines Logo
6:25 am - 7:52 amSEA-EZE
21h 27m2 stops
Copa Airlines Logo
2:33 pm - 10:15 pmEZE-SEA
35h 42m2 stops
$1,038Copa Airlines
Find Deal
jue., ago. 28 - jue., sep. 4
Delta Logo
9:45 pm - 5:55 amSEA-EZE
28h 10m2 stops
Delta Logo
3:55 am - 10:23 pmEZE-SEA
22h 28m2 stops
$1,058Delta
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lun., ago. 25 - dom., sep. 7
American Airlines Logo
7:45 am - 7:25 amSEA-EZE
19h 40m2 stops
American Airlines Logo
10:30 pm - 11:59 pmEZE-SEA
29h 29m1 stop
$1,071American Airlines
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lun., ago. 25 - lun., sep. 8
Delta Logo
7:20 am - 9:45 amSEA-EZE
21h 25m1 stop
Delta Logo
7:55 am - 10:14 pmEZE-SEA
19h 19m2 stops
$1,075Delta
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mar., dic. 2 - mar., dic. 9
American Airlines Logo
12:59 am - 8:15 amSEA-EZE
26h 16m1 stop
American Airlines Logo
9:40 pm - 2:43 pmEZE-SEA
22h 03m2 stops
$1,093American Airlines
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lun., dic. 1 - mar., dic. 9
United Airlines Logo
11:59 pm - 7:20 amSEA-EZE
26h 21m2 stops
United Airlines Logo
11:55 pm - 9:07 pmEZE-SEA
26h 12m3 stops
$1,180United Airlines
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dom., nov. 30 - mié., dic. 17
United Airlines Logo
11:59 pm - 9:20 amSEA-EZE
28h 21m1 stop
United Airlines Logo
11:55 pm - 7:22 pmEZE-SEA
24h 27m1 stop
$1,191United Airlines
Find Deal
lun., nov. 24 - mar., dic. 16

LATAM Airlines flights from Seattle to Buenos Aires

Our best LATAM Airlines deals on Seattle to Buenos Aires flight tickets
LATAM Airlines
Oct 18
SEA11:29 amSeattle/Tacoma Intl
44h 31m
2 stops
AEP12:00 pmBuenos Aires Jorge Newbery
Nov 1
AEP8:25 pmBuenos Aires Jorge Newbery
21h 37m
2 stops
SEA2:02 pmSeattle/Tacoma Intl
$868
Find similar
LATAM Airlines
Dec 2
SEA8:00 amSeattle/Tacoma Intl
20h 15m
2 stops
EZE9:15 amBuenos Aires Ministro Pistarini
Dec 9
EZE7:43 pmBuenos Aires Ministro Pistarini
22h 17m
2 stops
SEA1:00 pmSeattle/Tacoma Intl
$1,023
Find similar
LATAM Airlines
Aug 25
SEA8:35 amSeattle/Tacoma Intl
23h 22m
2 stops
EZE11:57 amBuenos Aires Ministro Pistarini
Sep 8
EZE6:13 pmBuenos Aires Ministro Pistarini
22h 21m
2 stops
SEA12:34 pmSeattle/Tacoma Intl
$1,031
Find similar

Delta flights from Seattle to Buenos Aires

Our best Delta deals on Seattle to Buenos Aires flight tickets
Delta
Aug 25
SEA9:45 pmSeattle/Tacoma Intl
28h 10m
2 stops
EZE5:55 amBuenos Aires Ministro Pistarini
Sep 7
EZE3:55 amBuenos Aires Ministro Pistarini
22h 28m
2 stops
SEA10:23 pmSeattle/Tacoma Intl
$1,058
Find similar
Delta
Dec 2
SEA7:20 amSeattle/Tacoma Intl
21h 25m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
Dec 9
EZE7:55 amBuenos Aires Ministro Pistarini
19h 19m
2 stops
SEA10:14 pmSeattle/Tacoma Intl
$1,075
Find similar
Delta
Dec 7
SEA3:55 pmSeattle/Tacoma Intl
36h 05m
1 stop
EZE9:00 amBuenos Aires Ministro Pistarini
Dec 15
EZE8:55 pmBuenos Aires Ministro Pistarini
20h 30m
1 stop
SEA12:25 pmSeattle/Tacoma Intl
$1,091
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momondo 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, momondo users made 832,500 searches. Data last updated agosto 1, 2025.
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 - AEP

SEAAEP

Seattle/Tacoma Intl

sáb. 10/18

11:29 am-12:00 pm

2 stops44h 31m

Buenos Aires Jorge Newbery

sáb. 11/1

8:25 pm-2:02 pm

2 stops21h 37m

$868

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

mar. 12/2

8:00 am-9:15 am

2 stops20h 15m

Buenos Aires Ministro Pistarini

mar. 12/9

7:43 pm-1:00 pm

2 stops22h 17m

$1,023

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

vie. 11/7

3:48 pm-10:31 pm

2 stops25h 43m

Buenos Aires Ministro Pistarini

jue. 11/20

5:11 am-11:10 pm

2 stops22h 59m

$1,028

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

jue. 8/28

6:25 am-7:52 am

2 stops21h 27m

Buenos Aires Ministro Pistarini

jue. 9/4

2:33 pm-10:15 pm

2 stops35h 42m

$1,038

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

lun. 8/25

9:45 pm-5:55 am

2 stops28h 10m

Buenos Aires Ministro Pistarini

dom. 9/7

3:55 am-10:23 pm

2 stops22h 28m

$1,058

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

lun. 8/25

7:45 am-7:25 am

2 stops19h 40m

Buenos Aires Ministro Pistarini

lun. 9/8

10:30 pm-11:59 pm

1 stop29h 29m

$1,071

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

mar. 12/2

7:20 am-9:45 am

1 stop21h 25m

Buenos Aires Ministro Pistarini

mar. 12/9

7:55 am-10:14 pm

2 stops19h 19m

$1,075

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

lun. 12/1

12:59 am-8:15 am

1 stop26h 16m

Buenos Aires Ministro Pistarini

mar. 12/9

9:40 pm-2:43 pm

2 stops22h 03m

$1,093

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

dom. 11/30

11:59 pm-7:20 am

2 stops26h 21m

Buenos Aires Ministro Pistarini

mié. 12/17

11:55 pm-9:07 pm

3 stops26h 12m

$1,180

SeattleBuenos Aires

SEA - EZE

SEAEZE

Seattle/Tacoma Intl

lun. 11/24

11:59 pm-9:20 am

1 stop28h 21m

Buenos Aires Ministro Pistarini

mar. 12/16

11:55 pm-7:22 pm

1 stop24h 27m

$1,191

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Buenos Aires from

How to get the cheapest flight ticket from Seattle to Buenos Aires

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Buenos Aires?

The cheapest month to fly to Buenos Aires from Seattle is in August. Flight prices, which tend to average around $1,230, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of August, then book flights to Buenos Aires from Seattle during October instead. Flights to Buenos Aires in October, while not as cheap as those in August, still average around $1,257.

What is the cheapest day to depart on your flight to Buenos Aires?

On average, the least expensive day to fly to Buenos Aires from Seattle is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $1,328. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Buenos Aires on Saturday is $1,503.

What is the cheapest time of day to depart on your flight to Buenos Aires?

Our most recent data shows that the best time of day to fly to Buenos Aires is in the afternoon. Flights from Seattle to Buenos Aires during this time can be as low as $1,307. Try not to purchase tickets at noon because they tend to be around $1,438. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Buenos Aires?

You are more likely to see cheaper flights to Buenos Aires from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,358 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from Seattle for as low as $1,189 on momondo.

Can stopping save me money on Seattle to Buenos Aires flights?

You could potentially save up to 32% on your flight if you consider stops on a Seattle to Buenos Aires flight.

How have Seattle to Buenos Aires flight prices changed over time?

As of August 2025, prices for Seattle to Buenos Aires flights are approximately 91% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to Buenos Aires

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Buenos Aires according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Buenos Aires (SEA to BUE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Buenos Aires

Best Price Found

$400

Fastest flight time

17h 20m

Direct flights

None

Airports in Buenos Aires

2 airports
The best one-way flight to Buenos Aires from Seattle in the past 72 hours is $400. The best round-trip flight deal from Seattle to Buenos Aires found on momondo in the last 72 hours is $868.
The fastest flight from Seattle to Buenos Aires takes 17h 20m
There are no direct flights from Seattle to Buenos Aires. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - Buenos Aires Ministro Pistarini Airport and Seattle/Tacoma Intl Airport - Buenos Aires Jorge Newbery Airport.
There are 2 airports near Buenos Aires: Buenos Aires Ministro Pistarini (EZE), Buenos Aires Jorge Newbery (AEP)
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  • How far is Seattle/Tacoma Intl to Buenos Aires by plane?

    The straight-line distance from Seattle/Tacoma Intl to Buenos Aires is 6914.0 mi. Typically, this will take 17h 30m by plane in normal conditions.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Buenos Aires?

    Prices for flights from Seattle/Tacoma Intl Airport to Buenos Aires are refreshed on a daily basis.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Buenos Aires?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Buenos Aires?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Buenos Aires.

  • What documentation or ID do you need to fly to Buenos Aires?

    The necessary travel and health documents for your Buenos Aires trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Buenos Aires?

Best airlines flying from Seattle to Buenos Aires

Compare and see reviews for airlines that fly from Seattle to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $1,100Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $1,133Free CancellationRating
8.0
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $1,200Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Buenos Aires?

Finding the right flight to Buenos Aires from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Buenos Aires quick and easy, saving you time and money.

Can I find flights from Seattle to Buenos Aires with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Buenos Aires from Seattle with this policy.

How can momondo help me find flights from Seattle to Buenos Aires?

momondo provides multiple filters to help you find the best flight to Buenos Aires from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seattle to Buenos Aires right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to Buenos Aires flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to Argentina

Fly into one of these airports located in Buenos Aires

Airports listed have a maximum distance of 17.0 mi from Buenos Aires
Buenos Aires Jorge Newbery Airport
Buenos Aires Ministro Pistarini Airport