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$399+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — BUE
Aug 18 — Aug 251
Mon 8/18
Mon 8/25
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Buenos Aires are usually found in May or July, booked 54 days in advance, depart on a Tuesday or Wednesday and return on a Saturday

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 August 13, 2025.

Round-trip from

$982
(Trip.com)

One-way from

$399
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$1,295
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. 4% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 13, 2025.

This Trip.com deal was found by Cheapflights users on 8/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/182:18 pmPDX - EZE
3 stops29h 52mMultiple Airlines
Fri 10/317:35 amEZE - PDX
3 stops32h 40mMultiple Airlines
Deal found 8/11$982
This Trip.com deal was found by Cheapflights users on 8/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/82:50 pmPDX - AEP
2 stops21h 15mMultiple Airlines
Mon 9/158:10 pmAEP - PDX
2 stops21h 14mMultiple Airlines
Deal found 8/11$988
This Trip.com deal was found by Cheapflights users on 8/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/410:30 amPDX - EZE
2 stops21h 15mMultiple Airlines
Mon 9/153:55 amEZE - PDX
2 stops43h 15mMultiple Airlines
Deal found 8/11$1,029
This Trip.com deal was found by Cheapflights users on 8/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/47:21 amPDX - AEP
2 stops27h 19mMultiple Airlines
Tue 9/168:10 pmAEP - PDX
2 stops24h 20mMultiple Airlines
Deal found 8/11$1,029
This Trip.com deal was found by Cheapflights users on 8/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2110:30 amPDX - AEP
2 stops19h 10mMultiple Airlines
Tue 11/118:25 pmAEP - PDX
2 stops25h 25mMultiple Airlines
Deal found 8/11$1,073
This Trip.com deal was found by Cheapflights users on 8/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/159:30 pmPDX - EZE
2 stops49h 00mMultiple Airlines
Wed 12/37:43 pmEZE - PDX
2 stops22h 38mMultiple Airlines
Deal found 8/12$1,083
This FlightHub deal was found by Cheapflights users on 8/12. 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 10/226:29 amPDX - EZE
2 stops19h 41mLATAM Airlines
Wed 11/57:43 pmEZE - PDX
2 stops21h 02mLATAM Airlines
Deal found 8/12$1,094
This Delta deal was found by Cheapflights users on 8/12. 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.
Mon 12/89:10 amPDX - EZE
2 stops18h 50mDelta
Wed 12/1710:25 pmEZE - PDX
2 stops23h 21mDelta
Deal found 8/12$1,116
This Kiwi.com deal was found by Cheapflights users on 8/11. 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 12/79:30 pmPDX - EZE
2 stops30h 45mMultiple Airlines
Mon 12/1511:00 amEZE - PDX
1 stop38h 23mMultiple Airlines
Deal found 8/11$1,117
This FlightHub deal was found by Cheapflights users on 8/11. 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 10/17:15 amPDX - AEP
2 stops23h 15mLATAM Airlines
Mon 11/35:15 pmAEP - PDX
2 stops24h 45mLATAM Airlines
Deal found 8/11$1,118
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 12/97:00 amPDX - EZE
2 stops46h 07mMultiple Airlines
Mon 12/1511:00 amEZE - PDX
1 stop38h 23mMultiple Airlines
Deal found 8/12$1,120
This United Airlines deal was found by Cheapflights users on 8/12. 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 11/177:00 amPDX - EZE
1 stop19h 20mUnited Airlines
Tue 12/211:55 pmEZE - PDX
2 stops23h 46mUnited Airlines
Deal found 8/12$1,125

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 August 13, 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

Sat 10/18

2:18 pm-12:10 am

3 stops29h 52m

Buenos Aires Ministro Pistarini

Fri 10/31

7:35 am-12:15 pm

3 stops32h 40m

$982

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Mon 9/8

2:50 pm-4:05 pm

2 stops21h 15m

Buenos Aires Jorge Newbery

Mon 9/15

8:10 pm-1:24 pm

2 stops21h 14m

$988

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Thu 9/4

10:30 am-11:45 am

2 stops21h 15m

Buenos Aires Ministro Pistarini

Mon 9/15

3:55 am-7:10 pm

2 stops43h 15m

$1,029

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Thu 9/4

7:21 am-2:40 pm

2 stops27h 19m

Buenos Aires Jorge Newbery

Tue 9/16

8:10 pm-4:30 pm

2 stops24h 20m

$1,029

PortlandBuenos Aires

PDX - AEP

PDXAEP

Portland

Tue 10/21

10:30 am-9:40 am

2 stops19h 10m

Buenos Aires Jorge Newbery

Tue 11/11

8:25 pm-4:50 pm

2 stops25h 25m

$1,073

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Wed 11/19

6:30 am-6:20 am

2 stops18h 50m

Buenos Aires Ministro Pistarini

Wed 12/3

7:43 pm-11:54 am

2 stops21h 11m

$1,094

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Wed 10/22

6:29 am-6:10 am

2 stops19h 41m

Buenos Aires Ministro Pistarini

Wed 11/5

7:43 pm-11:45 am

2 stops21h 02m

$1,094

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Mon 12/8

8:30 am-9:20 am

2 stops19h 50m

Buenos Aires Ministro Pistarini

Tue 12/16

10:05 pm-12:12 pm

1 stop19h 07m

$1,116

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Sun 12/7

9:45 pm-9:00 am

1 stop30h 15m

Buenos Aires Ministro Pistarini

Tue 12/16

8:55 pm-10:56 am

1 stop19h 01m

$1,116

PortlandBuenos Aires

PDX - EZE

PDXEZE

Portland

Tue 12/9

6:15 am-10:15 am

2 stops23h 00m

Buenos Aires Ministro Pistarini

Wed 12/17

10:25 pm-4:46 pm

2 stops23h 21m

$1,116

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 34 results
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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 August 8, 2025.

To ensure you get the cheapest price possible for a flight from Portland to Buenos Aires, you should look to book at least 54 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, April is the cheapest month in which you can book a flight from Portland to Buenos Aires (average of $795). Flying from Portland to Buenos Aires in December is currently the most expensive (average of $1,260). 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 August 13, 2025.

It’s typically best to fly out from Portland to Buenos Aires in the afternoon. Doing so could potentially save you 23% on the flight price compared to flying at noon, 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 August 13, 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
7,979 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,979 reviews
Delta
8.0
Very good
7,979 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
LATAM Airlines
7.5
Good
1,838 reviews
Delta
8.0
Very good
7,979 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,920 reviews
Delta
8.0
Very good
7,979 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,979 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What is the cheapest airline to fly from Portland to Buenos Aires round-trip?

    LATAM Airlines, at $1,118, was found to be the cheapest airline from Portland to Buenos Aires.. LATAM Airlines is 19% 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, April is the cheapest month in which you can book a flight from Portland to Buenos Aires (average of $795). Flying from Portland to Buenos Aires in December is currently the most expensive (average of $1,260). 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 August 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$1,060Average$1,280FlexibilityNo cancel feeOn-time71%
DeltaCheapest$1,113Average$1,265FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$1,123Average$1,415FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$1,125Average$1,392FlexibilityNo cancel feeOn-time69%

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