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Porto Alegre

$390+ Cheap flights from Dulles Intl (IAD) to Porto Alegre (POA)

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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — POA
Sep 10 — Sep 171
Thu 9/10
Thu 9/17
1 adult, Economy
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Cheap flight deals from Dulles Intl to Porto Alegre

Cheapest flights from Dulles Intl to Porto Alegre
Explore the most affordable flight options available from Dulles Intl to Porto Alegre. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 11, 2026.

This Copa Airlines deal was found by Cheapflights users on 8/10. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:25 am -
1 stop20h 55m
Wed 9/301:20 am -
1 stop28h 00m
Deal found 8/10$810
This Copa Airlines deal was found by Cheapflights users on 8/7. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/142:25 am -
1 stop20h 55m
Sun 9/271:20 am -
1 stop14h 44m
Deal found 8/7$830
This LATAM Airlines deal was found by Cheapflights users on 8/9. 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.
Wed 11/46:32 pm -
2 stops20h 43m
Mon 11/95:40 pm -
2 stops19h 55m
Deal found 8/9$839
This Fareboom deal was found by Cheapflights users on 8/9. 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 Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/22:35 pm -
2 stops18h 25m
Mon 11/95:15 am -
2 stops25h 15m
Deal found 8/9$906
This Expedia deal was found by Cheapflights users on 8/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:25 pm -
2 stops29h 55m
Mon 9/2811:30 am -
2 stops27h 45m
Deal found 8/7$919
This Air Canada deal was found by Cheapflights users on 8/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/39:55 am -
2 stops28h 35m
Mon 11/95:10 pm -
2 stops29h 13m
Deal found 8/9$949
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 9/232:25 am -
1 stop20h 55m
Thu 10/15:30 am -
2 stops20h 02m
Deal found 8/10$985
This LATAM Airlines deal was found by Cheapflights users on 8/10. 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.
Wed 10/2812:30 pm -
2 stops27h 45m
Sun 11/15:40 pm -
2 stops18h 30m
Deal found 8/10$986
This LATAM Airlines deal was found by Cheapflights users on 8/9. 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.
Sun 11/16:32 pm -
2 stops18h 48m
Mon 11/98:05 pm -
2 stops17h 30m
Deal found 8/9$989
This Air Canada deal was found by Cheapflights users on 8/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/319:55 am -
2 stops47h 05m
Mon 11/95:10 pm -
2 stops29h 13m
Deal found 8/9$1,019

Find flight deals from Dulles Intl to Porto Alegre

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Porto Alegre (POA). 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 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$810
(Copa Airlines)

One-way from

$390
(Copa Airlines)

Popular in

August

Cheapest in

September

Average price

$1,378
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Porto Alegre Salgado Filho flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Porto Alegre Salgado Filho flights.
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From Washington, D.C. Dulles Intl to Porto Alegre Salgado Filho
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Porto Alegre Salgado Filho
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Highest demand for flights based on searches. 7% potential increase in price ($77 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in August 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Porto Alegre 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 11, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Porto Alegre that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Wed 9/23

2:25 am-12:20 am

1 stop20h 55m

Porto Alegre Salgado Filho

Wed 9/30

1:20 am-4:20 am

1 stop28h 00m

$810

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Mon 9/14

2:25 am-12:20 am

1 stop20h 55m

Porto Alegre Salgado Filho

Sun 9/27

1:20 am-3:04 pm

1 stop14h 44m

$830

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Wed 9/23

2:25 am-12:20 am

1 stop20h 55m

Porto Alegre Salgado Filho

Thu 10/1

5:30 am-12:32 am

2 stops20h 02m

$985

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Sun 11/1

10:25 pm-6:20 pm

1 stop17h 55m

Porto Alegre Salgado Filho

Mon 11/9

5:10 pm-11:52 am

2 stops20h 42m

$1,136
Quickest round-trip

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Wed 10/28

11:30 pm-2:35 pm

1 stop14h 05m

Porto Alegre Salgado Filho

Sun 11/1

3:25 pm-6:30 am

1 stop17h 05m

$1,463

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Sat 12/19

11:20 am-11:50 pm

3 stops34h 30m

Porto Alegre Salgado Filho

Thu 12/24

5:15 am-4:25 am

3 stops25h 10m

$1,548

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Sun 12/20

12:14 pm-3:00 pm

2 stops24h 46m

Porto Alegre Salgado Filho

Fri 2/26

2:15 pm-11:39 am

2 stops23h 24m

$1,609

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Sun 12/27

10:55 am-3:20 pm

2 stops26h 25m

Porto Alegre Salgado Filho

Sat 1/9

8:05 pm-11:52 am

2 stops41h 47m

$1,758

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Sat 12/19

6:59 pm-4:50 pm

2 stops43h 51m

Porto Alegre Salgado Filho

Thu 12/24

8:05 pm-3:11 pm

2 stops21h 06m

$1,788
Cheapest one-way

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Sun 8/16

2:25 am-12:15 am

1 stop20h 50m

$390

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/8

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Compare providers for flights from Dulles Intl to Porto Alegre

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 Dulles Intl to Porto Alegre in August.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice 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 Washington, D.C. Dulles Intl Airport-Porto Alegre flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Porto Alegre flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Porto Alegre flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Porto Alegre 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 Washington, D.C. Dulles Intl Airport-Porto Alegre 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 Dulles Intl to Porto Alegre

Have a flexible travel schedule? Discover the best time to fly to Porto Alegre from Dulles Intl 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.

Reviews of airlines servicing Porto Alegre

Get insights into the airlines that provide service to Porto Alegre. 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 Porto Alegre. Reviews last updated August 11, 2026.
Peruse reviews from past customers who have flown with Copa Airlines from Washington, D.C. Dulles Intl Airport to Porto Alegre 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.
Copa Airlines
7.6
Good
1,558 reviews

Entertainment

6.8

Crew

8.1

Boarding

7.8

Comfort

7.4

Food

6.9

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2026

BOS - PTY

Airline was delayed 1 hour, that made my layover flight be missed, gave wrong information about gates, they closed the gates in my face, rebooked me, and had business class, and rebooked me not business class
Copa Airlines
7.6
Good
1,558 reviews
Copa Airlines
7.6
Good
1,558 reviews

Entertainment

6.8

Crew

8.1

Boarding

7.8

Comfort

7.4

Food

6.9

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2026

BOS - PTY

Airline was delayed 1 hour, that made my layover flight be missed, gave wrong information about gates, they closed the gates in my face, rebooked me, and had business class, and rebooked me not business class

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Porto Alegre. 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 into for flights to Porto Alegre from Washington, D.C. Dulles Intl?

    Most people fly into Porto Alegre Salgado Filho (POA) if they book a flight to Porto Alegre from Washington, D.C. Dulles Intl. On average, Salgado Filho has 0 inbound flights from Washington, D.C. Dulles Intl per day from 1 airline. Porto Alegre Salgado Filho is conveniently located just 4.0 mi from Porto Alegre’s city center.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Porto Alegre?

    For as low as $1,136, Copa Airlines can have you in Porto Alegre from Washington, D.C. Dulles Intl Airport in 17h 55m. There are 5051 mi between Washington, D.C. Dulles Intl Airport and Porto Alegre. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Porto Alegre round-trip?

    Flying on Copa Airlines is currently your cheapest option to Porto Alegre, with prices starting at $485.

  • Can I find deals for flights from Dulles Intl to Porto Alegre that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Porto Alegre flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Porto Alegre?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Porto Alegre.

  • Can I find deals for business class flights from Dulles Intl to Porto Alegre?

    Yes. Cheapflights offers flight deals from Dulles Intl to Porto Alegre by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Complete your trip

Complete your trip to Porto Alegre by adding a car rental and/or hotel reservation to your travel itinerary.
Porto Alegre car rentals
Porto Alegre Salgado Filho Airport car rentals

Top airline flying from Dulles Intl to Porto Alegre

Discover the top airline that operate flights from Dulles Intl to Porto Alegre. 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 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$485Average$485FlexibilityNo cancel feeOn-time70%

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