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.

$1,000 CHEAP FLIGHTS from Washington to Porto Alegre

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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

Sun, Jan 31 - Thu, Feb 4

7:15 am - 12:10 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

35h 55m2 stops New York John F Kennedy Intl Sao Paulo Guarulhos 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

$1,070LATAM Airlines

Tue, Dec 8 - Fri, Dec 11

7:30 am - 3:00 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

26h 30m2 stops Dallas/Fort Worth Sao Paulo Guarulhos Intl

5:20 am - 11:59 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

23h 39m2 stops Brasilia Miami

$1,100GOL

Fri, Nov 6 - Sun, Nov 22

7:30 am - 2:40 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

26h 10m2 stops Dallas/Fort Worth Sao Paulo Guarulhos Intl

2:40 pm - 1:23 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

27h 43m2 stops Sao Paulo Guarulhos Intl Dallas/Fort Worth

$1,126GOL

Sat, Nov 7 - Mon, Nov 16

7:30 am - 3:10 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

26h 40m2 stops Dallas/Fort Worth Sao Paulo Guarulhos Intl

2:15 pm - 1:15 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

28h 00m2 stops Sao Paulo Guarulhos Intl Dallas/Fort Worth

$1,126GOL

Sun, Jan 31 - Thu, Feb 4

6:00 am - 5:15 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

30h 15m2 stops Atlanta Hartsfield-Jackson Sao Paulo Guarulhos 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

$1,198LATAM Airlines

Sun, Jan 31 - Thu, Feb 4

8:00 am - 2:20 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

25h 20m2 stops Washington, D.C. Dulles Intl Sao Paulo Guarulhos Intl

2:05 pm - 8:10 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

35h 05m3 stops Sao Paulo Guarulhos Intl Chicago O'Hare Intl Washington, D.C. Dulles Intl

$1,263United Airlines

Sun, Jan 31 - Thu, Feb 4

8:00 am - 4:30 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

27h 30m2 stops Washington, D.C. Dulles Intl Sao Paulo Guarulhos Intl

3:45 pm - 8:10 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

33h 25m3 stops Sao Paulo Guarulhos Intl Chicago O'Hare Intl Washington, D.C. Dulles Intl

$1,263United Airlines

Tue, Dec 8 - Fri, Dec 11

8:15 am - 12:55 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

23h 40m3 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl Sao Paulo Guarulhos Intl

5:25 pm - 8:59 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

32h 34m2 stops Rio de Janeiro–Galeão Intl Toronto Pearson Intl

$1,353Air Canada

Fri, Oct 23 - Fri, Oct 30

12:04 pm - 3:35 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

23h 31m2 stops Dallas/Fort Worth Sao Paulo Guarulhos Intl

2:15 pm - 1:35 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

27h 20m2 stops Sao Paulo Guarulhos Intl Dallas/Fort Worth

$1,365GOL

Tue, Nov 10 - Tue, Nov 17

7:00 am - 12:55 pmPDX Portland-POA Porto Alegre Salgado Filho

24h 55m3 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl Sao Paulo Guarulhos Intl

5:40 am - 8:50 pmPOA Porto Alegre Salgado Filho-PDX Portland

44h 10m3 stops Sao Paulo Guarulhos Intl Mexico City Benito Juarez Guadalajara Miguel Hidal

$1,372Multiple Airlines

Useful Info

Cheapest flight	$1,000

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.