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.

$1,197 CHEAP FLIGHTS from Washington to Porto Alegre

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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 26 - Wed, Dec 9

7:45 am - 12:55 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

24h 10m3 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl Sao Paulo Guarulhos Intl

5:10 pm - 8:59 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

32h 49m2 stops Sao Paulo Guarulhos Intl Toronto Pearson Intl

$1,197Air Canada

Thu, Nov 26 - Wed, Dec 9

8:09 am - 4:30 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

27h 21m2 stops Washington, D.C. Dulles Intl Sao Paulo Guarulhos Intl

2:00 pm - 11:44 amPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

26h 44m2 stops Sao Paulo Guarulhos Intl Chicago O'Hare Intl

$1,232United Airlines

Thu, Oct 29 - Wed, Nov 11

7:00 am - 12:55 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

25h 55m2 stops Chicago O'Hare Intl Sao Paulo Guarulhos Intl

2:00 pm - 2:39 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

29h 39m3 stops Sao Paulo Guarulhos Intl Houston George Bush Intcntl San Francisco

$1,282United Airlines

Thu, Oct 29 - Wed, Nov 11

7:00 am - 12:55 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

25h 55m2 stops Chicago O'Hare Intl Sao Paulo Guarulhos Intl

5:10 pm - 8:56 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

32h 46m2 stops Sao Paulo Guarulhos Intl Washington, D.C. Dulles Intl

$1,282United Airlines

Sun, Nov 22 - Tue, Dec 1

11:35 pm - 6:40 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

26h 05m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

7:30 am - 10:18 amPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

31h 48m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,293LATAM Airlines

Sun, Nov 22 - Tue, Dec 1

8:40 am - 4:30 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

26h 50m3 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl Sao Paulo Guarulhos Intl

2:00 pm - 8:59 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

35h 59m2 stops Sao Paulo Guarulhos Intl Toronto Pearson Intl

$1,302Air Canada

Sun, Jan 31 - Thu, Feb 4

8:08 am - 4:30 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

27h 22m2 stops Washington, D.C. Dulles Intl Sao Paulo Guarulhos Intl

3:45 pm - 9:59 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

35h 14m3 stops Sao Paulo Guarulhos Intl Washington, D.C. Dulles Intl Los Angeles

$1,332United Airlines

Sun, Jan 31 - Thu, Feb 4

9:20 pm - 6:40 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

28h 20m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

7:30 am - 12:09 amPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

21h 39m2 stops Lima J Chavez Intl Atlanta Hartsfield-Jackson

$1,353LATAM Airlines

Sat, Dec 19 - Sat, Jan 2

9:23 pm - 11:50 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

33h 27m2 stops Miami Brasilia

5:20 am - 12:59 amPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

24h 39m2 stops Brasilia Miami

$2,808GOL

Wed, Dec 30 - Mon, Feb 1

10:27 am - 3:00 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

23h 33m2 stops Dallas/Fort Worth Sao Paulo Guarulhos Intl

6:40 pm - 11:30 amPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

21h 50m2 stops Rio de Janeiro–Galeão Intl Dallas/Fort Worth

$5,028GOL

Useful Info

Cheapest flight	$1,197

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.