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$453+ Cheap flights from Portland (PDX) to Buenos Aires (BUE)

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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — BUE
Mar 21 — Mar 281
Sat 3/21
Sat 3/28
1 adult, Economy
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Cheap flight deals from Portland to Buenos Aires

Cheapest flights from Portland to Buenos Aires
Explore the most affordable flight options available from Portland to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 19, 2026.

This BusinessClass deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1211:40 am
PDX
-
EZE
1 stop18h 05m
LATAM Airlines
Thu 8/278:10 pm
EZE
-
PDX
1 stop18h 27m
LATAM Airlines
Deal found 2/15$986
This KAYAK deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/911:00 pm
PDX
-
EZE
2 stops29h 35m
LATAM Airlines
Mon 8/248:10 pm
EZE
-
PDX
1 stop18h 27m
LATAM Airlines
Deal found 2/15$993
This Delta deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:04 am
PDX
-
EZE
1 stop23h 41m
Delta
Tue 8/258:10 pm
EZE
-
PDX
1 stop18h 27m
Delta
Deal found 2/15$997
This KAYAK deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1011:40 am
PDX
-
AEP
2 stops26h 50m
LATAM Airlines
Tue 8/255:05 pm
AEP
-
PDX
2 stops23h 08m
LATAM Airlines
Deal found 2/15$997
This United Airlines deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:30 am
PDX
-
EZE
3 stops22h 30m
United Airlines
Tue 8/259:00 pm
EZE
-
PDX
2 stops24h 38m
United Airlines
Deal found 2/15$1,001
This Delta deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/911:00 pm
PDX
-
EZE
1 stop30h 45m
Delta
Mon 8/248:10 pm
EZE
-
PDX
1 stop18h 27m
Delta
Deal found 2/15$1,011
This United Airlines deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1511:55 pm
PDX
-
EZE
2 stops52h 05m
United Airlines
Wed 8/269:00 pm
EZE
-
PDX
2 stops25h 05m
United Airlines
Deal found 2/15$1,023
This FlightHub deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/81:10 pm
PDX
-
EZE
3 stops25h 11m
LATAM Airlines
Wed 4/297:21 pm
EZE
-
PDX
2 stops20h 47m
LATAM Airlines
Deal found 2/17$1,025
This FlightHub deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/81:10 pm
PDX
-
AEP
2 stops22h 50m
LATAM Airlines
Wed 4/295:05 pm
AEP
-
PDX
2 stops23h 03m
LATAM Airlines
Deal found 2/17$1,025
This United Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:00 am
PDX
-
EZE
2 stops21h 00m
United Airlines
Mon 4/279:00 pm
EZE
-
PDX
2 stops21h 30m
United Airlines
Deal found 2/18$1,033
This KAYAK deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/711:40 am
PDX
-
EZE
1 stop18h 05m
LATAM Airlines
Mon 4/277:45 am
EZE
-
PDX
2 stops30h 56m
LATAM Airlines
Deal found 2/17$1,039
This KAYAK deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:15 am
PDX
-
AEP
2 stops21h 25m
LATAM Airlines
Tue 4/288:40 am
AEP
-
PDX
2 stops30h 01m
LATAM Airlines
Deal found 2/17$1,039

Find flight deals from Portland to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) 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 February 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$986
(BusinessClass)

One-way from

$453
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$1,303
Provider with most accurate pricing for Portland-Buenos Aires (BUE) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Buenos Aires (BUE) flights.
Search Deals
From Portland to Buenos Aires (BUE)
Search Deals
One-way flight from Portland to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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 2,558,603 searches. Data last updated February 19, 2026.
Use the filters below to find and compare flights from Portland to Buenos Aires that are best for you.

Fly from

Portland

Fly to

Buenos Aires

Route

Depart

Return

Price

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Wed 4/8

1:10 pm-4:00 pm

2 stops22h 50m

Buenos Aires Jorge Newbery

Wed 4/29

5:05 pm-12:08 pm

2 stops23h 03m

$1,025

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Thu 4/16

7:00 am-8:00 am

1 stop21h 00m

Buenos Aires Ministro Pistarini

Mon 4/27

9:00 pm-12:34 pm

1 stop19h 34m

$1,033

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Thu 4/9

11:40 am-9:45 am

1 stop18h 05m

Buenos Aires Ministro Pistarini

Tue 4/28

11:30 am-12:08 pm

2 stops28h 38m

$1,039

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Tue 4/7

6:30 am-7:40 am

2 stops21h 10m

Buenos Aires Jorge Newbery

Wed 4/29

5:05 pm-12:08 pm

2 stops23h 03m

$1,039

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Wed 4/8

1:10 pm-4:00 pm

2 stops22h 50m

Buenos Aires Jorge Newbery

Mon 4/27

5:05 pm-12:08 pm

2 stops23h 03m

$1,039

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Wed 4/8

1:10 pm-6:30 pm

2 stops25h 20m

Buenos Aires Jorge Newbery

Tue 4/28

3:45 pm-10:41 am

2 stops22h 56m

$1,039

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Wed 4/29

6:45 am-10:30 am

2 stops23h 45m

Buenos Aires Jorge Newbery

Tue 5/12

3:45 pm-10:01 am

2 stops22h 16m

$1,039

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Wed 4/8

1:10 pm-4:00 pm

2 stops22h 50m

Buenos Aires Jorge Newbery

Sun 4/26

8:05 pm-7:05 pm

2 stops27h 00m

$1,039

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Thu 4/9

10:58 am-2:50 pm

2 stops23h 52m

Buenos Aires Jorge Newbery

Sun 4/26

8:05 pm-7:05 pm

2 stops27h 00m

$1,039

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Thu 4/9

10:58 am-2:50 pm

2 stops23h 52m

Buenos Aires Jorge Newbery

Mon 4/27

5:05 pm-12:08 pm

2 stops23h 03m

$1,039

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 28 results
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Compare providers for flights from Portland to Buenos Aires

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Buenos Aires in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-Buenos Aires flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Buenos Aires flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Buenos Aires flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Buenos Aires flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Buenos Aires flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Portland 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 Portland to Buenos Aires

What is the cheapest month to book a flight from Portland to Buenos Aires?

Currently, March is the cheapest month in which you can book a flight from Portland to Buenos Aires (average of $826). Flying from Portland to Buenos Aires in June is currently the most expensive (average of $1,595). 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 Portland to Buenos Aires?

Reviews of airlines servicing Buenos Aires

Get insights into the airlines that provide service to Buenos Aires. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Buenos Aires. Reviews last updated February 19, 2026.
Peruse reviews from past customers who have flown with Delta, LATAM Airlines, and United Airlines from Portland to Buenos Aires to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,212 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,212 reviews
Delta
7.9
Good
8,212 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
LATAM Airlines
7.5
Good
1,921 reviews
Delta
7.9
Good
8,212 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,322 reviews
Delta
7.9
Good
8,212 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,313 reviews
Delta
7.9
Good
8,212 reviews

Food

7.2

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Portland 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 Portland to Buenos Aires?

    Most people fly from Portland (PDX) if they book a flight from Portland to Buenos Aires. On average, Portland has 0 outbound flights to Buenos Aires per day from 4 airlines. Portland is conveniently located just 6.0 mi from Portland’s city center.

  • How long is the flight from Portland to Buenos Aires?

    There are many flights that can get you from Portland to Buenos Aires in 21h. Fly via LATAM Airlines, United Airlines, or Delta to get the fastest option. Airlines will cover a distance of 6836 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Portland to Buenos Aires round-trip?

    American Airlines, at $826, was found to be the cheapest airline from Portland to Buenos Aires.Alternate airlines to your destination round-trip include United Airlines and Delta. American Airlines is 37% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Portland to Buenos Aires that include hotel bookings?

    Yes. In addition to deals on Portland to Buenos Aires flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Buenos Aires?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Buenos Aires.

  • Can I find deals for business class flights from Portland to Buenos Aires?

    Yes. Cheapflights offers flight deals from Portland 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 Portland to Buenos Aires?

    Currently, March is the cheapest month in which you can book a flight from Portland to Buenos Aires (average of $826). Flying from Portland to Buenos Aires in June is currently the most expensive (average of $1,595). 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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Top 4 airlines flying from Portland to Buenos Aires

Discover the top 4 airlines that operate flights from Portland to Buenos Aires. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$826Average$1,325FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$971Average$1,272FlexibilityNo cancel feeOn-time69%
DeltaCheapest$1,081Average$1,327FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$1,165Average$1,282FlexibilityNo cancel feeOn-time81%

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