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$519+ 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 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — BUE
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Buenos Aires are usually found in October or May, booked 17 days in advance, depart on a Tuesday or Wednesday and return on a Saturday

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 October 16, 2025.

This LATAM Airlines deal was found by Cheapflights users on 10/15. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1110:35 amPDX - EZE
2 stops27h 08mLATAM Airlines
Thu 11/277:43 pmEZE - PDX
2 stops21h 03mLATAM Airlines
Deal found 10/15$884
This United Airlines deal was found by Cheapflights users on 10/16. 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 12/107:00 amPDX - EZE
1 stop19h 20mUnited Airlines
Tue 12/1610:05 pmEZE - PDX
2 stops25h 40mUnited Airlines
Deal found 10/16$893
This Delta deal was found by Cheapflights users on 10/15. 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.
Wed 10/2211:26 amPDX - EZE
1 stop18h 19mDelta
Thu 10/308:55 pmEZE - PDX
1 stop20h 05mDelta
Deal found 10/15$902
This LATAM Airlines deal was found by Cheapflights users on 10/15. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:00 amPDX - AEP
2 stops30h 00mLATAM Airlines
Mon 11/38:25 pmAEP - PDX
2 stops22h 25mLATAM Airlines
Deal found 10/15$902
This Delta deal was found by Cheapflights users on 10/16. 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.
Thu 10/2311:10 amPDX - EZE
2 stops18h 35mDelta
Thu 10/308:55 pmEZE - PDX
1 stop20h 05mDelta
Deal found 10/16$906
This American Airlines deal was found by Cheapflights users on 10/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/105:30 amPDX - EZE
1 stop21h 35mAmerican Airlines
Tue 12/1610:30 pmEZE - PDX
1 stop25h 40mAmerican Airlines
Deal found 10/15$916
This KAYAK deal was found by Cheapflights users on 10/15. 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.
Wed 10/226:00 amPDX - EZE
2 stops31h 11mLATAM Airlines
Sat 11/17:43 pmEZE - PDX
2 stops20h 46mLATAM Airlines
Deal found 10/15$952
This KAYAK deal was found by Cheapflights users on 10/15. 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.
Fri 10/246:29 amPDX - AEP
2 stops30h 31mLATAM Airlines
Thu 10/302:55 pmAEP - PDX
2 stops24h 50mLATAM Airlines
Deal found 10/15$952
This Delta deal was found by Cheapflights users on 10/15. 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.
Thu 10/2311:26 amPDX - EZE
1 stop18h 19mDelta
Fri 10/318:55 pmEZE - PDX
2 stops19h 54mDelta
Deal found 10/15$956
This LATAM Airlines deal was found by Cheapflights users on 10/15. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1410:35 amPDX - EZE
2 stops27h 08mLATAM Airlines
Fri 11/217:43 pmEZE - PDX
2 stops21h 34mLATAM Airlines
Deal found 10/15$960
This American Airlines deal was found by Cheapflights users on 10/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/3010:45 pmPDX - EZE
1 stop27h 40mAmerican Airlines
Sun 12/710:30 pmEZE - PDX
1 stop17h 34mAmerican Airlines
Deal found 10/16$967
This Expedia deal was found by Cheapflights users on 10/16. 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.
Sun 11/306:29 amPDX - AEP
2 stops27h 11mLATAM Airlines
Sun 12/75:15 pmAEP - PDX
2 stops25h 20mLATAM Airlines
Deal found 10/16$982

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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$865
(LATAM Airlines)

One-way from

$519
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$1,234
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. 2% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 16, 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

Wed 12/10

7:00 am-7:20 am

1 stop19h 20m

Buenos Aires Ministro Pistarini

Tue 12/16

10:05 pm-6:45 pm

2 stops25h 40m

$893

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Wed 1/14

11:45 am-9:00 am

1 stop16h 15m

Buenos Aires Ministro Pistarini

Thu 1/22

8:55 pm-11:05 am

1 stop19h 10m

$902

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Thu 10/30

6:00 am-4:00 pm

2 stops30h 00m

Buenos Aires Jorge Newbery

Mon 11/3

8:25 pm-11:45 am

2 stops20h 20m

$902

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Tue 1/13

11:45 am-9:00 am

1 stop16h 15m

Buenos Aires Ministro Pistarini

Thu 1/22

8:55 pm-11:05 am

1 stop19h 10m

$902

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Mon 1/26

12:59 pm-9:20 am

1 stop15h 21m

Buenos Aires Ministro Pistarini

Mon 3/2

10:05 pm-6:47 pm

2 stops25h 42m

$902

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Thu 12/4

5:05 pm-6:40 pm

2 stops20h 35m

Buenos Aires Jorge Newbery

Thu 12/11

3:40 pm-10:44 am

2 stops24h 04m

$902

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Wed 1/14

11:45 am-9:00 am

1 stop16h 15m

Buenos Aires Ministro Pistarini

Wed 1/21

8:55 pm-11:05 am

1 stop19h 10m

$902

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Sun 10/26

10:10 pm-7:55 am

2 stops29h 45m

Buenos Aires Jorge Newbery

Mon 11/3

3:40 pm-11:45 am

2 stops25h 05m

$902

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Wed 1/21

11:45 am-9:00 am

1 stop16h 15m

Buenos Aires Ministro Pistarini

Thu 1/29

8:55 pm-11:05 am

1 stop19h 10m

$902

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Sun 1/18

12:59 pm-7:20 am

1 stop37h 21m

Buenos Aires Ministro Pistarini

Tue 1/27

10:05 pm-12:18 pm

1 stop19h 13m

$914

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

Showing 1-10 of 31 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 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

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 October 10, 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, October is the cheapest month in which you can book a flight from Portland to Buenos Aires (average of $901). 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.

What is the cheapest time of day to fly from PDX to BUE?

Find hourly flight availability from Portland to Buenos Aires. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 16, 2025.

It’s typically best to fly out from Portland to Buenos Aires in the morning. Doing so could potentially save you 27% on the flight price compared to flying in the evening, which is usually more expensive.

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 October 16, 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
8.0
Very good
7,982 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
LATAM Airlines
7.5
Good
1,866 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,982 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,040 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 16h 15m. Fly via United Airlines, Delta, or LATAM Airlines 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 $1,015, was found to be the cheapest airline from Portland to Buenos Aires.Alternate airlines to your destination round-trip include LATAM Airlines and United Airlines. American Airlines is 26% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Portland to Buenos Aires one-way?

    To fly one-way, consider booking your trip with Air Canada, which is currently one of the cheapest options available, starting at $587. Delta flights start at $758 while deals on LATAM Airlines start at $799 one-way.

  • 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, October is the cheapest month in which you can book a flight from Portland to Buenos Aires (average of $901). 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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$1,015Average$1,309FlexibilityNo cancel feeOn-time71%
LATAM AirlinesCheapest$1,123Average$1,415FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$1,125Average$1,351FlexibilityNo cancel feeOn-time69%
DeltaCheapest$1,165Average$1,422FlexibilityNo cancel feeOn-timeN/A

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