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$377+ 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 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — BUE
Jan 29 — Feb 51
Thu 1/29
Thu 2/5
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 December 30, 2025.

This United Airlines deal was found by Cheapflights users on 12/28. 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.
Mon 12/297:00 amPDX - EZE
1 stop21h 20mUnited Airlines
Wed 1/1411:55 pmEZE - PDX
1 stop27h 58mUnited Airlines
Deal found 12/28$1,332
This Expedia deal was found by Cheapflights users on 12/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:37 amPDX - AEP
2 stops20h 08mMultiple Airlines
Wed 1/1410:55 pmAEP - PDX
2 stops43h 40mMultiple Airlines
Deal found 12/28$1,516
This Booking.com deal was found by Cheapflights users on 12/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 pmPDX - EZE
3 stops39h 10mAir Canada
Wed 1/144:45 pmEZE - PDX
3 stops54h 45mAir Canada
Deal found 12/28$1,641
This Expedia deal was found by Cheapflights users on 12/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 pmPDX - EZE
3 stops39h 10mMultiple Airlines
Wed 1/1411:00 amEZE - PDX
2 stops37h 08mMultiple Airlines
Deal found 12/28$1,852
This United Airlines deal was found by Cheapflights users on 12/27. 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 12/317:00 amPDX - EZE
1 stop19h 20mUnited Airlines
Fri 1/211:55 pmEZE - PDX
1 stop18h 25mUnited Airlines
Deal found 12/27$2,231
This FlightHub deal was found by Cheapflights users on 12/27. 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 12/317:15 amPDX - EZE
2 stops25h 30mLATAM Airlines
Fri 1/211:55 pmEZE - PDX
2 stops28h 03mLATAM Airlines
Deal found 12/27$2,248
This oojo deal was found by Cheapflights users on 12/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:47 pmPDX - AEP
2 stops20h 13mMultiple Airlines
Fri 1/28:25 pmAEP - PDX
2 stops22h 19mMultiple Airlines
Deal found 12/27$4,480
This business-class.com deal was found by Cheapflights users on 12/29. 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 business-class.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:00 amPDX - EZE
2 stops21h 15mMultiple Airlines
Sun 1/188:05 amEZE - PDX
2 stops19h 30mMultiple Airlines
Deal found 12/29$4,805
This United Airlines deal was found by Cheapflights users on 12/29. 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 12/3111:59 pmPDX - EZE
1 stop26h 21mUnited Airlines
Sun 1/1811:55 pmEZE - PDX
1 stop17h 23mUnited Airlines
Deal found 12/29$5,182
This FlightHub deal was found by Cheapflights users on 12/28. 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 12/315:11 pmPDX - AEP
2 stops20h 29mLATAM Airlines
Sun 1/186:20 pmAEP - PDX
2 stops22h 40mLATAM Airlines
Deal found 12/28$5,416

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 December 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$970
(Kiwi.com)

One-way from

$377
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$1,578
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. 1% potential increase in price ($17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($24 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 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 December 30, 2025.
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 - EZE

PDXEZE

Portland

Mon 3/9

11:40 am-9:00 am

1 stop17h 20m

Buenos Aires Ministro Pistarini

Tue 3/17

7:43 pm-12:14 pm

2 stops20h 31m

$1,102

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Mon 3/9

6:15 am-7:55 am

2 stops21h 40m

Buenos Aires Jorge Newbery

Tue 3/17

8:25 pm-12:14 pm

2 stops19h 49m

$1,102

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Wed 2/11

2:57 pm-10:34 pm

2 stops26h 37m

Buenos Aires Ministro Pistarini

Mon 2/16

10:45 pm-8:44 pm

1 stop26h 59m

$1,117

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Wed 3/11

6:15 am-9:15 am

2 stops23h 00m

Buenos Aires Ministro Pistarini

Thu 3/26

11:55 pm-7:00 pm

1 stop23h 05m

$1,118

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Tue 3/10

6:15 am-6:05 am

2 stops19h 50m

Buenos Aires Ministro Pistarini

Tue 3/31

4:45 pm-12:14 pm

2 stops23h 29m

$1,118

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Thu 3/12

6:30 am-11:45 am

2 stops25h 15m

Buenos Aires Jorge Newbery

Tue 3/31

3:40 pm-12:14 pm

2 stops24h 34m

$1,118

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Sun 3/15

10:30 pm-7:55 am

2 stops29h 25m

Buenos Aires Jorge Newbery

Wed 4/1

3:40 pm-10:30 am

2 stops22h 50m

$1,118

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Tue 3/10

10:58 am-10:30 am

2 stops19h 32m

Buenos Aires Jorge Newbery

Wed 4/1

3:40 pm-10:30 am

2 stops22h 50m

$1,118

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Thu 3/12

6:30 am-11:45 am

2 stops25h 15m

Buenos Aires Jorge Newbery

Thu 3/26

6:20 pm-12:14 pm

2 stops21h 54m

$1,118

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Sun 3/15

10:30 pm-7:55 am

2 stops29h 25m

Buenos Aires Jorge Newbery

Tue 3/31

6:20 pm-12:14 pm

2 stops21h 54m

$1,118

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/28

Showing 1-10 of 27 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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland-Buenos Aires flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

How far ahead should I book a flight from Portland to Buenos Aires?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Buenos Aires. Price data was last updated on December 26, 2025.

To ensure you get the cheapest price possible for a flight from Portland to Buenos Aires, you should look to book at least 17 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 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 December 30, 2025.
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
8,016 reviews

Entertainment

7.8

Overall

7.9

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

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
8,016 reviews
Delta
7.9
Good
8,016 reviews

Entertainment

7.8

Overall

7.9

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

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
1,896 reviews
Delta
7.9
Good
8,016 reviews

Entertainment

7.8

Overall

7.9

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

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
9,124 reviews
Delta
7.9
Good
8,016 reviews

Entertainment

7.8

Overall

7.9

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

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
11,074 reviews
Delta
7.9
Good
8,016 reviews

Entertainment

7.8

Overall

7.9

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

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 17h 20m. Fly via LATAM Airlines to get the fastest option. Airlines will cover a distance of 6836 mi.

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

    United Airlines, at $971, was found to be the cheapest airline from Portland to Buenos Aires.Alternate airlines to your destination round-trip include American Airlines and Delta. United Airlines is 29% 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 December 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$971Average$1,285FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,009Average$1,325FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,081Average$1,332FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$1,125Average$1,415FlexibilityNo cancel feeOn-time81%

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