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.

$578 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

Mon, Nov 23 - Wed, Dec 9

6:00 am - 6:40 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

19h 40m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl

5:40 pm - 3:11 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

26h 31m2 stops Santiago Arturo Merino Benitez Los Angeles

$1,271LATAM Airlines

Mon, Nov 23 - Wed, Dec 9

6:30 am - 6:25 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

30h 55m2 stops Newark Sao Paulo Guarulhos Intl

2:00 pm - 9:01 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

36h 01m3 stops Sao Paulo Guarulhos Intl Chicago O'Hare Intl Washington, D.C. Dulles Intl

$1,276United Airlines

Mon, Mar 8 - Fri, Mar 12

7:45 am - 6:55 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

30h 10m2 stops Toronto Pearson Intl Sao Paulo Guarulhos Intl

3:15 pm - 8:59 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

34h 44m2 stops Rio de Janeiro–Galeão Intl Toronto Pearson Intl

$1,300Air Canada

Mon, Nov 23 - Fri, Dec 11

6:30 am - 6:25 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

30h 55m2 stops Newark Sao Paulo Guarulhos Intl

5:10 pm - 4:18 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

28h 08m2 stops Sao Paulo Guarulhos Intl Chicago O'Hare Intl

$1,354United Airlines

Sun, Feb 21 - Sat, Feb 27

11:05 pm - 8:30 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

28h 25m2 stops Orlando Sao Paulo Guarulhos Intl

6:50 pm - 9:52 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

32h 02m2 stops Sao Paulo Congonhas Orlando

$1,358Multiple 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

$1,422LATAM 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, Feb 21 - Sat, Feb 27

7:00 am - 6:25 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

30h 25m2 stops Houston George Bush Intcntl Sao Paulo Guarulhos Intl

5:10 pm - 8:27 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

32h 17m3 stops Sao Paulo Guarulhos Intl Chicago O'Hare Intl Washington, D.C. Dulles Intl

$1,431United Airlines

Sat, Dec 5 - Fri, Dec 11

8:10 am - 4:50 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

27h 40m2 stops Miami Santiago Arturo Merino Benitez

5:40 pm - 12:39 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

23h 59m2 stops Santiago Arturo Merino Benitez Los Angeles

$1,434LATAM Airlines

Mon, Nov 23 - Fri, Dec 11

6:30 am - 4:30 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

29h 00m2 stops Newark Sao Paulo Guarulhos Intl

5:10 pm - 9:58 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

33h 48m3 stops Sao Paulo Guarulhos Intl Washington, D.C. Dulles Intl Los Angeles

$1,472United Airlines

Useful Info

Cheapest flight	$578

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.