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$400+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — BUE
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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Cheap 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 January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$979
(Kiwi.com)

One-way from

$400
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$1,299
Provider with most accurate pricing for Portland-Buenos Aires (BUE) flight deals.
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Provider most trusted by Cheapflights users for Portland-Buenos Aires (BUE) flights.
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From Portland to Buenos Aires (BUE)
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One-way flight from Portland to Buenos Aires (BUE)
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Highest demand for flights based on searches. 2% potential increase in price ($27 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find 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 January 8, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/910:30 amPDX - EZE
3 stops38h 40mMultiple Airlines
Mon 3/238:00 amEZE - PDX
1 stop40h 35mMultiple Airlines
Deal found 1/8$979
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/37:00 amPDX - EZE
1 stop21h 35mMultiple Airlines
Tue 2/106:15 amEZE - PDX
3 stops36h 26mMultiple Airlines
Deal found 1/6$1,008
This Kiwi.com deal was found by Cheapflights users on 1/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/27:00 amPDX - EZE
1 stop21h 35mMultiple Airlines
Fri 3/139:15 pmEZE - PDX
2 stops23h 35mMultiple Airlines
Deal found 1/7$1,048
This Kiwi.com deal was found by Cheapflights users on 1/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/27:16 pmPDX - EZE
2 stops32h 44mMultiple Airlines
Sun 3/1510:45 pmEZE - PDX
1 stop25h 59mMultiple Airlines
Deal found 1/7$1,069
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/269:53 amPDX - EZE
2 stops43h 42mMultiple Airlines
Tue 3/311:20 pmEZE - PDX
1 stop35h 15mMultiple Airlines
Deal found 1/6$1,076
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:00 amPDX - EZE
1 stop17h 30mMultiple Airlines
Wed 4/110:45 pmEZE - PDX
1 stop25h 50mMultiple Airlines
Deal found 1/6$1,079
This KAYAK deal was found by Cheapflights users on 1/6. 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 4/2010:55 pmPDX - EZE
1 stop30h 50mLATAM Airlines
Mon 5/48:10 pmEZE - PDX
1 stop18h 31mLATAM Airlines
Deal found 1/6$1,094
This Kiwi.com deal was found by Cheapflights users on 1/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/257:00 amPDX - EZE
1 stop23h 35mMultiple Airlines
Tue 2/102:27 amEZE - PDX
2 stops22h 42mMultiple Airlines
Deal found 1/7$1,099
This Gurufare deal was found by Cheapflights users on 1/6. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:10 amPDX - EZE
1 stop20h 50mAvianca
Thu 8/209:00 pmEZE - PDX
2 stops23h 54mAvianca
Deal found 1/6$1,101
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:00 amPDX - EZE
1 stop17h 30mMultiple Airlines
Tue 3/311:20 pmEZE - PDX
2 stops38h 24mMultiple Airlines
Deal found 1/6$1,105
This KAYAK deal was found by Cheapflights users on 1/6. 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.
Thu 3/56:25 amPDX - AEP
2 stops23h 05mLATAM Airlines
Thu 3/262:55 pmAEP - PDX
2 stops25h 19mLATAM Airlines
Deal found 1/6$1,119
This FlightHub deal was found by Cheapflights users on 1/6. 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.
Thu 3/56:25 amPDX - AEP
2 stops23h 05mLATAM Airlines
Sat 3/148:25 pmAEP - PDX
2 stops19h 49mLATAM Airlines
Deal found 1/6$1,142

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 January 8, 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 - EZE

PDXEZE

Portland

Mon 3/2

7:00 am-9:35 am

1 stop21h 35m

Buenos Aires Ministro Pistarini

Fri 3/13

9:15 pm-4:50 pm

2 stops23h 35m

$1,048

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Thu 3/26

9:53 am-9:35 am

2 stops43h 42m

Buenos Aires Ministro Pistarini

Tue 3/31

1:20 pm-8:35 pm

1 stop35h 15m

$1,076

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Wed 3/25

7:00 am-4:30 am

1 stop17h 30m

Buenos Aires Ministro Pistarini

Wed 4/1

10:45 pm-8:35 pm

1 stop25h 50m

$1,079

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Sun 1/25

7:00 am-11:35 am

1 stop23h 35m

Buenos Aires Ministro Pistarini

Tue 2/10

2:27 am-8:09 pm

2 stops22h 42m

$1,099

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Wed 3/25

7:00 am-4:30 am

1 stop17h 30m

Buenos Aires Ministro Pistarini

Tue 3/31

1:20 pm-11:44 pm

2 stops38h 24m

$1,105

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Tue 2/3

7:05 am-10:15 am

1 stop22h 10m

Buenos Aires Ministro Pistarini

Tue 2/10

10:25 pm-8:43 pm

1 stop27h 18m

$1,115

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Mon 3/2

7:00 am-10:15 am

1 stop22h 15m

Buenos Aires Ministro Pistarini

Fri 3/13

8:55 pm-10:30 am

1 stop17h 35m

$1,118

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Wed 3/25

10:58 am-9:15 am

2 stops18h 17m

Buenos Aires Ministro Pistarini

Wed 4/1

12:22 pm-12:14 pm

2 stops27h 52m

$1,119

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Mon 3/9

6:15 am-11:45 am

2 stops25h 30m

Buenos Aires Jorge Newbery

Mon 3/23

5:15 pm-12:14 pm

2 stops22h 59m

$1,119

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Thu 3/5

6:25 am-10:30 am

2 stops23h 05m

Buenos Aires Jorge Newbery

Thu 3/26

2:55 pm-12:14 pm

2 stops25h 19m

$1,119

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 24 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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
eDreamsPrice Accuracy3 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 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 January 2, 2026.

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.

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 January 8, 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
8,029 reviews

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Comfort

7.9

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
8,029 reviews
Delta
7.9
Good
8,029 reviews

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Comfort

7.9

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
1,898 reviews
Delta
7.9
Good
8,029 reviews

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Comfort

7.9

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
9,141 reviews
Delta
7.9
Good
8,029 reviews

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Comfort

7.9

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
11,095 reviews
Delta
7.9
Good
8,029 reviews

Crew

8.5

Overall

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

Comfort

7.9

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 25h 30m. Fly via LATAM Airlines to get the fastest option. Airlines will cover a distance of 6826 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

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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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$971Average$1,285FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,009Average$1,330FlexibilityNo 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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