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Porto Alegre

$315+ 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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — POA
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
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 March 22, 2026.

This Copa Airlines deal was found by Cheapflights users on 3/20. 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 5/112:21 am
IAD
-
POA
1 stop20h 59m
Copa Airlines
Tue 5/261:20 am
POA
-
IAD
1 stop24h 13m
Copa Airlines
Deal found 3/20$549
This United Airlines deal was found by Cheapflights users on 3/21. 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.
Tue 9/1510:35 pm
IAD
-
POA
1 stop16h 45m
United Airlines
Mon 9/283:25 pm
POA
-
IAD
2 stops23h 38m
United Airlines
Deal found 3/21$566
This Copa Airlines deal was found by Cheapflights users on 3/19. 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.
Tue 9/159:35 am
IAD
-
POA
1 stop13h 45m
Copa Airlines
Sun 9/271:20 am
POA
-
IAD
1 stop14h 44m
Copa Airlines
Deal found 3/19$644
This KAYAK deal was found by Cheapflights users on 3/22. 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.
Tue 9/154:00 pm
IAD
-
POA
2 stops24h 00m
LATAM Airlines
Mon 9/287:25 am
POA
-
IAD
2 stops26h 45m
LATAM Airlines
Deal found 3/22$688
This KAYAK deal was found by Cheapflights users on 3/22. 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 9/112:46 pm
IAD
-
POA
2 stops32h 09m
GOL
Fri 9/256:00 am
POA
-
IAD
2 stops33h 00m
GOL
Deal found 3/22$704
This Copa Airlines deal was found by Cheapflights users on 3/17. 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.
Thu 4/302:21 am
IAD
-
POA
1 stop20h 59m
Copa Airlines
Thu 5/71:20 am
POA
-
IAD
1 stop24h 13m
Copa Airlines
Deal found 3/17$711
This Gurufare deal was found by Cheapflights users on 3/19. 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.
Fri 9/116:00 am
IAD
-
POA
2 stops26h 15m
LATAM Airlines
Fri 9/257:05 pm
POA
-
IAD
2 stops25h 11m
LATAM Airlines
Deal found 3/19$758
This Gurufare deal was found by Cheapflights users on 3/20. 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 5/125:31 pm
IAD
-
POA
2 stops35h 44m
LATAM Airlines
Wed 5/275:50 pm
POA
-
IAD
2 stops19h 33m
LATAM Airlines
Deal found 3/20$761

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 March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$549
(Copa Airlines)

One-way from

$315
(Copa Airlines)

Popular in

December

Cheapest in

October

Average price

$707
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
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($283 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 16% potential price decrease ($121 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 22, 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 - POA

IADPOA

Washington, D.C. Dulles Intl

Mon 5/11

2:21 am-12:20 am

1 stop20h 59m

Porto Alegre Salgado Filho

Tue 5/26

1:20 am-12:33 am

1 stop24h 13m

$549

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Tue 9/15

10:35 pm-4:20 pm

1 stop16h 45m

Porto Alegre Salgado Filho

Mon 9/28

3:25 pm-2:03 pm

2 stops23h 38m

$566
Quickest round-trip

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Tue 9/15

9:35 am-12:20 am

1 stop13h 45m

Porto Alegre Salgado Filho

Sun 9/27

1:20 am-3:04 pm

1 stop14h 44m

$644

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Tue 9/15

4:00 pm-5:00 pm

2 stops24h 00m

Porto Alegre Salgado Filho

Mon 9/28

7:25 am-9:10 am

2 stops26h 45m

$688

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Thu 4/30

2:21 am-12:20 am

1 stop20h 59m

Porto Alegre Salgado Filho

Thu 5/7

1:20 am-12:33 am

1 stop24h 13m

$711
Cheapest one-way
Quickest one-way

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Mon 4/6

9:32 am-12:20 am

1 stop13h 48m

$315

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Tue 4/7

6:00 am-1:45 pm

2 stops30h 45m

$325

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Mon 6/15

8:15 am-2:05 pm

2 stops28h 50m

$325

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Mon 4/6

10:30 pm-4:30 pm

2 stops41h 00m

$338

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Thu 7/16

6:25 am-12:15 am

1 stop16h 50m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

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 March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 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 March 22, 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
7.5
Good
1,574 reviews

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.8

Comfort

7.4

Overall

7.5

Reviews

1 / 20
2.0
Mediocre

Katerine,Mar 2026

LAX - PTY

Really i was expecting be more friendly with family’s, more when you travel with a infant. We expected like a priority to boarding or be friendly with the spots on the aeroplane.
Copa Airlines
7.5
Good
1,574 reviews
Copa Airlines
7.5
Good
1,574 reviews

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.8

Comfort

7.4

Overall

7.5

Reviews

1 / 20
2.0
Mediocre

Katerine,Mar 2026

LAX - PTY

Really i was expecting be more friendly with family’s, more when you travel with a infant. We expected like a priority to boarding or be friendly with the spots on the aeroplane.

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 $566, Copa Airlines can have you in Porto Alegre from Washington, D.C. Dulles Intl Airport in 16h 45m. 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 $428. Copa Airlines is currently priced 51% below the average price you’ll pay for this route.

  • 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 March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$428Average$524FlexibilityNo cancel feeOn-time70%

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