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Cheap flights from Washington to Buenos Aires from $408

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Buenos Aires departing on 10/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
9:45 am - 2:50 pmSEA  Seattle/Tacoma Intl-AEP Buenos Aires Jorge Newbery
25h 05m2 stops Los Angeles Santiago Arturo Merino Benitez
LATAM Airlines Logo
9:45 pm - 9:49 pmAEP  Buenos Aires Jorge Newbery-SEA Seattle/Tacoma Intl
28h 04m2 stops Sao Paulo Guarulhos Intl Orlando
$1,120LATAM Airlines
Thu, Oct 22 - Wed, Oct 28
LATAM Airlines Logo
7:59 am - 9:25 amSEA  Seattle/Tacoma Intl-AEP Buenos Aires Jorge Newbery
21h 26m2 stops Miami Sao Paulo Guarulhos Intl
LATAM Airlines Logo
5:35 pm - 2:53 pmAEP  Buenos Aires Jorge Newbery-SEA Seattle/Tacoma Intl
25h 18m2 stops Lima J Chavez Intl Los Angeles
$1,155LATAM Airlines
Wed, Sep 9 - Tue, Sep 15
LATAM Airlines Logo
9:45 am - 4:00 pmSEA  Seattle/Tacoma Intl-AEP Buenos Aires Jorge Newbery
26h 15m2 stops Los Angeles Lima J Chavez Intl
LATAM Airlines Logo
11:45 am - 10:00 pmAEP  Buenos Aires Jorge Newbery-SEA Seattle/Tacoma Intl
38h 15m2 stops Sao Paulo Guarulhos Intl Miami
$1,200LATAM Airlines
Thu, Oct 8 - Wed, Oct 21
LATAM Airlines Logo
7:15 am - 2:50 pmSEA  Seattle/Tacoma Intl-AEP Buenos Aires Jorge Newbery
27h 35m2 stops Los Angeles Santiago Arturo Merino Benitez
LATAM Airlines Logo
6:20 pm - 10:00 pmAEP  Buenos Aires Jorge Newbery-SEA Seattle/Tacoma Intl
31h 40m2 stops Sao Paulo Guarulhos Intl Miami
$1,200LATAM Airlines
Tue, Sep 22 - Tue, Oct 6
LATAM Airlines Logo
9:59 am - 2:50 pmSEA  Seattle/Tacoma Intl-AEP Buenos Aires Jorge Newbery
24h 51m2 stops Los Angeles Santiago Arturo Merino Benitez
LATAM Airlines Logo
6:20 pm - 10:00 pmAEP  Buenos Aires Jorge Newbery-SEA Seattle/Tacoma Intl
31h 40m2 stops Sao Paulo Guarulhos Intl Miami
$1,200LATAM Airlines
Tue, Sep 22 - Tue, Oct 6
Multiple Airlines Logo
8:25 pm - 8:30 amPDX  Portland-AEP Buenos Aires Jorge Newbery
31h 05m2 stops Los Angeles Lima J Chavez Intl
Multiple Airlines Logo
5:35 pm - 11:10 pmAEP  Buenos Aires Jorge Newbery-PDX Portland
34h 35m2 stops Lima J Chavez Intl Los Angeles
$1,225Multiple Airlines
Sun, Nov 1 - Sun, Nov 8
Multiple Airlines Logo
6:00 am - 8:30 amPDX  Portland-AEP Buenos Aires Jorge Newbery
21h 30m2 stops Los Angeles Lima J Chavez Intl
Multiple Airlines Logo
5:35 pm - 4:42 pmAEP  Buenos Aires Jorge Newbery-PDX Portland
28h 07m2 stops Lima J Chavez Intl Los Angeles
$1,230Multiple Airlines
Wed, Dec 2 - Sun, Dec 20
Multiple Airlines Logo
9:30 pm - 7:40 amPDX  Portland-AEP Buenos Aires Jorge Newbery
30h 10m2 stops Los Angeles Lima J Chavez Intl
Multiple Airlines Logo
8:05 pm - 12:08 pmAEP  Buenos Aires Jorge Newbery-PDX Portland
20h 03m2 stops Lima J Chavez Intl Los Angeles
$1,232Multiple Airlines
Sun, Oct 18 - Sun, Oct 25
LATAM Airlines Logo
11:55 am - 4:00 pmPDX  Portland-AEP Buenos Aires Jorge Newbery
23h 05m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
LATAM Airlines Logo
8:40 am - 12:10 pmAEP  Buenos Aires Jorge Newbery-PDX Portland
32h 30m2 stops Lima J Chavez Intl Los Angeles
$1,239LATAM Airlines
Mon, Nov 16 - Mon, Nov 30
Multiple Airlines Logo
11:15 pm - 5:40 amPDX  Portland-AEP Buenos Aires Jorge Newbery
26h 25m3 stops Guadalajara Miguel Hidal Cancun Bogotá El Dorado
Multiple Airlines Logo
12:50 pm - 7:11 pmAEP  Buenos Aires Jorge Newbery-PDX Portland
34h 21m3 stops Santiago Arturo Merino Benitez Los Angeles Vancouver Intl
$1,245Multiple Airlines
Mon, Sep 14 - Mon, Sep 28

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LATAM Airlines flights from State of Washington to Buenos Aires Jorge Newbery Airport

Our best LATAM Airlines deals on State of Washington to Buenos Aires Jorge Newbery Airport flight tickets
LATAM Airlines
Oct 22
SEA9:45 amSeattle/Tacoma Intl
25h 05m
2 stops
AEP2:50 pmBuenos Aires Jorge Newbery
Oct 28
AEP9:45 pmBuenos Aires Jorge Newbery
28h 04m
2 stops
SEA9:49 pmSeattle/Tacoma Intl
$1,120
LATAM Airlines
Sep 9
SEA7:59 amSeattle/Tacoma Intl
21h 26m
2 stops
AEP9:25 amBuenos Aires Jorge Newbery
Sep 15
AEP5:35 pmBuenos Aires Jorge Newbery
25h 18m
2 stops
SEA2:53 pmSeattle/Tacoma Intl
$1,155
LATAM Airlines
Sep 22
SEA7:15 amSeattle/Tacoma Intl
27h 35m
2 stops
AEP2:50 pmBuenos Aires Jorge Newbery
Oct 6
AEP6:20 pmBuenos Aires Jorge Newbery
31h 40m
2 stops
SEA10:00 pmSeattle/Tacoma Intl
$1,200

Delta flights from State of Washington to Buenos Aires Jorge Newbery Airport

Our best Delta deals on State of Washington to Buenos Aires Jorge Newbery Airport flight tickets
Delta
Jan 11
SEA2:30 pmSeattle/Tacoma Intl
20h 30m
2 stops
AEP4:00 pmBuenos Aires Jorge Newbery
Jan 18
AEP8:05 pmBuenos Aires Jorge Newbery
25h 54m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$1,378
Delta
Nov 4
SEA2:30 pmSeattle/Tacoma Intl
36h 10m
2 stops
AEP7:40 amBuenos Aires Jorge Newbery
Nov 15
AEP8:05 pmBuenos Aires Jorge Newbery
25h 46m
2 stops
SEA4:51 pmSeattle/Tacoma Intl
$1,398
Delta
Jan 14
SEA2:30 pmSeattle/Tacoma Intl
20h 30m
2 stops
AEP4:00 pmBuenos Aires Jorge Newbery
Jan 24
AEP3:50 pmBuenos Aires Jorge Newbery
26h 10m
2 stops
SEA1:00 pmSeattle/Tacoma Intl
$1,438

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Buenos Aires Jorge Newbery Airport 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 August 10, 2026.
Use the filters below to find and compare flights from Washington to Buenos Aires Jorge Newbery Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBuenos Aires

SEA Seattle/Tacoma Intl - AEP Buenos Aires Jorge Newbery

SEAAEP

Seattle/Tacoma Intl

Thu 10/22

9:45 am-2:50 pm

2 stops25h 05m

Buenos Aires Jorge Newbery

Wed 10/28

9:45 pm-9:49 pm

2 stops28h 04m

$1,120
Quickest round-trip

SeattleBuenos Aires

SEA Seattle/Tacoma Intl - AEP Buenos Aires Jorge Newbery

SEAAEP

Seattle/Tacoma Intl

Wed 9/9

7:59 am-9:25 am

2 stops21h 26m

Buenos Aires Jorge Newbery

Tue 9/15

5:35 pm-2:53 pm

2 stops25h 18m

$1,155

SeattleBuenos Aires

SEA Seattle/Tacoma Intl - AEP Buenos Aires Jorge Newbery

SEAAEP

Seattle/Tacoma Intl

Thu 10/8

9:45 am-4:00 pm

2 stops26h 15m

Buenos Aires Jorge Newbery

Wed 10/21

11:45 am-10:00 pm

2 stops38h 15m

$1,200

SeattleBuenos Aires

SEA Seattle/Tacoma Intl - AEP Buenos Aires Jorge Newbery

SEAAEP

Seattle/Tacoma Intl

Tue 9/22

7:15 am-2:50 pm

2 stops27h 35m

Buenos Aires Jorge Newbery

Tue 10/6

6:20 pm-10:00 pm

2 stops31h 40m

$1,200

SeattleBuenos Aires

SEA Seattle/Tacoma Intl - AEP Buenos Aires Jorge Newbery

SEAAEP

Seattle/Tacoma Intl

Tue 9/22

9:59 am-2:50 pm

2 stops24h 51m

Buenos Aires Jorge Newbery

Tue 10/6

6:20 pm-10:00 pm

2 stops31h 40m

$1,200

PortlandBuenos Aires

PDX Portland - AEP Buenos Aires Jorge Newbery

PDXAEP

Portland

Sun 11/1

8:25 pm-8:30 am

2 stops31h 05m

Buenos Aires Jorge Newbery

Sun 11/8

5:35 pm-11:10 pm

2 stops34h 35m

$1,225

PortlandBuenos Aires

PDX Portland - AEP Buenos Aires Jorge Newbery

PDXAEP

Portland

Wed 12/2

6:00 am-8:30 am

2 stops21h 30m

Buenos Aires Jorge Newbery

Sun 12/20

5:35 pm-4:42 pm

2 stops28h 07m

$1,230

PortlandBuenos Aires

PDX Portland - AEP Buenos Aires Jorge Newbery

PDXAEP

Portland

Sun 10/18

9:30 pm-7:40 am

2 stops30h 10m

Buenos Aires Jorge Newbery

Sun 10/25

8:05 pm-12:08 pm

2 stops20h 03m

$1,232

PortlandBuenos Aires

PDX Portland - AEP Buenos Aires Jorge Newbery

PDXAEP

Portland

Mon 11/16

11:55 am-4:00 pm

2 stops23h 05m

Buenos Aires Jorge Newbery

Mon 11/30

8:40 am-12:10 pm

2 stops32h 30m

$1,239

PortlandBuenos Aires

PDX Portland - AEP Buenos Aires Jorge Newbery

PDXAEP

Portland

Mon 9/14

11:15 pm-5:40 am

3 stops26h 25m

Buenos Aires Jorge Newbery

Mon 9/28

12:50 pm-7:11 pm

3 stops34h 21m

$1,245

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Buenos Aires from

How to get the cheapest flight ticket from State of Washington to Buenos Aires Jorge Newbery Airport

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

How long does it take to fly to Buenos Aires Jorge Newbery Airport?

Flight times vary depending on what airport in State of Washington you fly out of and what airport in Buenos Aires Jorge Newbery Airport you fly into. For example, flying from Seattle to Buenos Aires Ministro Pistarini Airport takes 20h 40m on average. On the other hand, flying from Spokane to Buenos Aires Ministro Pistarini Airport takes 22h on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

Cheap State of Washington to Buenos Aires Jorge Newbery Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Buenos Aires Jorge Newbery Airport

Fastest flight time

20h 20m

Direct flights

None
The fastest flight from State of Washington to Buenos Aires Jorge Newbery Airport takes 20h 20m
There are no direct flights from State of Washington to Buenos Aires Jorge Newbery Airport. There are no popular flight routes from State of Washington to Buenos Aires Jorge Newbery Airport.
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Frequently asked questions about flying from Washington to Buenos Aires Jorge Newbery Airport

  • When did momondo last update prices for flights from Washington to Buenos Aires Jorge Newbery Airport?

    Prices for flights from Washington to Buenos Aires Jorge Newbery Airport were last updated today.

  • How old do you have to be to fly from Washington to Buenos Aires Jorge Newbery Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Buenos Aires Jorge Newbery Airport.

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

    The necessary travel and health documents for your Buenos Aires Jorge Newbery Airport 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.

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington to Buenos Aires for you.

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

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

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington to Buenos Aires.

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

If you are not ready to book a flight from Washington to Buenos Aires now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Buenos Aires and let you know when they change.

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Popular flights according to clicks in the last 7 days on momondo
Flights to Buenos Aires Ministro Pistarini Airportfrom $496