HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Buenos Aires

$417+ 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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — BUE
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Buenos Aires with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Portland to Buenos Aires are usually found in October or May, booked 37 days in advance, depart on a Tuesday or Wednesday and return on a Saturday

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 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/14. 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 12/235:39 pmPDX - EZE
2 stops23h 52mMultiple Airlines
Wed 2/43:15 pmEZE - PDX
1 stop34h 12mMultiple Airlines
Deal found 12/14$1,202
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/227:00 amPDX - EZE
1 stop19h 20mUnited Airlines
Wed 2/410:05 pmEZE - PDX
1 stop19h 13mUnited Airlines
Deal found 12/14$1,221
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/227:00 amPDX - EZE
1 stop19h 20mUnited Airlines
Mon 2/211:55 pmEZE - PDX
2 stops29h 36mUnited Airlines
Deal found 12/14$1,225
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Sun 12/212:35 pmPDX - EZE
1 stop35h 45mUnited Airlines
Tue 2/310:05 pmEZE - PDX
2 stops25h 51mUnited Airlines
Deal found 12/14$1,237
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Sun 12/212:35 pmPDX - EZE
1 stop35h 45mUnited Airlines
Mon 2/211:55 pmEZE - PDX
2 stops29h 36mUnited Airlines
Deal found 12/14$1,242
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/227:00 amPDX - EZE
1 stop19h 20mUnited Airlines
Sun 2/811:55 pmEZE - PDX
1 stop17h 23mUnited Airlines
Deal found 12/14$1,261
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/225:00 amPDX - EZE
2 stops21h 20mUnited Airlines
Sat 2/710:05 pmEZE - PDX
2 stops19h 29mUnited Airlines
Deal found 12/14$1,265
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/175:00 amPDX - EZE
2 stops21h 20mUnited Airlines
Thu 2/511:55 pmEZE - PDX
2 stops26h 17mUnited Airlines
Deal found 12/14$1,275
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Sun 12/212:35 pmPDX - EZE
1 stop35h 45mUnited Airlines
Sun 2/811:55 pmEZE - PDX
1 stop17h 23mUnited Airlines
Deal found 12/14$1,277
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Sun 12/212:35 pmPDX - EZE
1 stop35h 45mUnited Airlines
Sat 2/710:05 pmEZE - PDX
2 stops21h 43mUnited Airlines
Deal found 12/14$1,282
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/202:45 pmPDX - EZE
2 stops37h 35mUnited Airlines
Thu 2/511:55 pmEZE - PDX
1 stop17h 23mUnited Airlines
Deal found 12/14$1,300
This Expedia deal was found by Cheapflights users on 12/14. 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.
Sat 12/2010:05 pmPDX - AEP
2 stops34h 55mLATAM Airlines
Thu 2/512:40 pmAEP - PDX
2 stops28h 20mLATAM Airlines
Deal found 12/14$1,644

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 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,078
(FlightHub)

One-way from

$417
(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 ($16 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 15, 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 2/2

1:02 pm-2:50 am

2 stops32h 48m

Buenos Aires Ministro Pistarini

Mon 2/16

7:43 pm-12:02 pm

2 stops21h 19m

$1,078

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Tue 1/27

7:05 am-10:15 am

1 stop22h 10m

Buenos Aires Ministro Pistarini

Tue 2/3

10:25 pm-8:43 pm

1 stop27h 18m

$1,098

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Tue 2/10

6:50 am-9:00 am

1 stop21h 10m

Buenos Aires Ministro Pistarini

Thu 3/5

7:43 pm-12:02 pm

2 stops21h 19m

$1,102

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Mon 2/2

1:02 pm-4:00 pm

2 stops21h 58m

Buenos Aires Jorge Newbery

Mon 2/16

8:25 pm-12:02 pm

2 stops20h 37m

$1,102

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Mon 3/2

6:25 am-6:20 am

2 stops18h 55m

Buenos Aires Ministro Pistarini

Mon 3/9

7:43 pm-12:10 pm

2 stops20h 27m

$1,118

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Tue 2/10

7:00 am-9:00 am

2 stops21h 00m

Buenos Aires Ministro Pistarini

Thu 3/5

11:55 pm-3:11 pm

2 stops20h 16m

$1,130

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Thu 3/5

6:25 am-10:30 am

2 stops23h 05m

Buenos Aires Jorge Newbery

Sat 3/14

3:40 pm-12:10 pm

2 stops24h 30m

$1,141

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Thu 3/5

12:09 pm-2:55 pm

2 stops21h 46m

Buenos Aires Ministro Pistarini

Sat 3/14

3:55 pm-4:43 pm

2 stops28h 48m

$1,166

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Thu 3/5

6:56 am-9:35 am

2 stops21h 39m

Buenos Aires Ministro Pistarini

Sat 3/14

3:55 pm-12:10 pm

2 stops24h 15m

$1,170

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Thu 2/5

6:25 am-7:55 am

2 stops20h 30m

Buenos Aires Jorge Newbery

Sun 2/8

5:15 pm-12:00 pm

2 stops23h 45m

$1,172

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

Showing 1-10 of 19 results
1
2

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 12, 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.

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 December 15, 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 December 15, 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
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Crew

8.5

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
8,008 reviews
Delta
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Crew

8.5

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
1,891 reviews
Delta
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Crew

8.5

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
9,093 reviews
Delta
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Crew

8.5

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
11,048 reviews
Delta
7.9
Good
8,008 reviews

Overall

7.9

Boarding

8.1

Food

7.3

Entertainment

7.9

Crew

8.5

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 32h 48m. 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$971Average$1,288FlexibilityNo 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%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.