How does KAYAK find such low prices on flights from Washington to Porto Alegre?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Porto Alegre.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Porto Alegre?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto Alegre from Washington is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Washington to Porto Alegre?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto Alegre with an airline and back to Washington with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Porto Alegre?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto Alegre from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$636 CHEAP FLIGHTS from Washington to Porto Alegre

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals

Cheap Flights from Washington to Porto Alegre

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Washington to Porto Alegre

Thu, Nov 12 - Sun, Nov 22

8:10 am - 10:00 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

20h 50m2 stops Miami Sao Paulo Guarulhos Intl

4:10 pm - 2:03 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

26h 53m2 stops Sao Paulo Guarulhos Intl Boston Logan Intl

$1,357LATAM Airlines

Sun, Jan 31 - Thu, Feb 4

11:45 am - 4:50 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

24h 05m2 stops Atlanta Hartsfield-Jackson Santiago Arturo Merino Benitez

7:30 am - 10:05 amPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

31h 35m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,422LATAM Airlines

Sun, Jan 31 - Thu, Feb 4

11:45 am - 4:50 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

24h 05m2 stops Atlanta Hartsfield-Jackson Santiago Arturo Merino Benitez

7:30 am - 10:05 amPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

31h 35m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,423LATAM Airlines

Sun, Jan 31 - Thu, Feb 4

11:45 am - 4:50 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

24h 05m2 stops Atlanta Hartsfield-Jackson Santiago Arturo Merino Benitez

7:30 am - 10:05 amPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

31h 35m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,424LATAM Airlines

Sun, Jan 31 - Thu, Feb 4

9:44 am - 4:50 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

26h 06m2 stops Los Angeles Santiago Arturo Merino Benitez

7:30 am - 10:05 amPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

31h 35m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,424LATAM Airlines

Thu, Nov 12 - Sun, Nov 22

10:50 am - 6:25 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

26h 35m2 stops Chicago O'Hare Intl Sao Paulo Guarulhos Intl

4:05 pm - 8:47 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

33h 42m3 stops Sao Paulo Guarulhos Intl Chicago O'Hare Intl San Francisco

$1,546United Airlines

Fri, Dec 11 - Fri, Dec 18

11:59 pm - 4:50 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

35h 51m2 stops Atlanta Hartsfield-Jackson Santiago Arturo Merino Benitez

9:20 am - 6:18 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

37h 58m2 stops Sao Paulo Guarulhos Intl Atlanta Hartsfield-Jackson

$1,728LATAM Airlines

Thu, Nov 12 - Sun, Nov 22

7:45 am - 12:30 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

35h 45m3 stops Toronto Pearson Intl Bogotá El Dorado Sao Paulo Guarulhos Intl

1:05 pm - 6:22 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

34h 17m3 stops Sao Paulo Guarulhos Intl Toronto Pearson Intl Vancouver Intl

$2,085Multiple Airlines

Sat, Dec 19 - Tue, Dec 29

11:42 am - 4:50 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

24h 08m2 stops Atlanta Hartsfield-Jackson Santiago Arturo Merino Benitez

5:15 am - 10:35 amPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

34h 20m2 stops Sao Paulo Guarulhos Intl New York John F Kennedy Intl

$2,127LATAM Airlines

Useful Info

Cheapest flight	$636

Flight from Seattle to Porto Alegre

How does KAYAK find such low prices on flights from Washington to Porto Alegre?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Porto Alegre.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Porto Alegre?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto Alegre from Washington is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Washington to Porto Alegre?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto Alegre with an airline and back to Washington with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Porto Alegre?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto Alegre from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.