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.

$733 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, Mar 8 - Fri, Mar 12

7:45 am - 4:25 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

27h 40m2 stops Toronto Pearson Intl Sao Paulo Guarulhos Intl

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

44h 34m2 stops Sao Paulo Guarulhos Intl Toronto Pearson Intl

$1,301Air Canada

Mon, Mar 8 - Fri, Mar 12

10:55 am - 6:25 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

26h 30m2 stops Chicago O'Hare Intl Sao Paulo Guarulhos Intl

5:10 pm - 7:03 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

30h 53m3 stops Sao Paulo Guarulhos Intl Houston George Bush Intcntl Los Angeles

$1,699United Airlines

Sat, Dec 19 - Mon, Dec 28

6:45 pm - 12:25 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

24h 40m2 stops Las Vegas Harry Reid Intl Panama City Tocumen Intl

1:35 am - 11:16 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

26h 41m2 stops Panama City Tocumen Intl Denver Intl

$1,875Multiple Airlines

Sat, Dec 19 - Thu, Dec 31

6:45 pm - 12:25 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

24h 40m2 stops Las Vegas Harry Reid Intl Panama City Tocumen Intl

1:40 am - 9:59 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

25h 19m2 stops Panama City Tocumen Intl Los Angeles

$2,003Multiple Airlines

Sun, Dec 20 - Wed, Jan 6

9:32 pm - 12:10 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

21h 38m2 stops Miami Sao Paulo Guarulhos Intl

6:00 pm - 12:40 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

23h 40m2 stops Sao Paulo Guarulhos Intl Atlanta Hartsfield-Jackson

$2,303Multiple Airlines

Thu, Dec 17 - Tue, Jan 5

6:00 am - 12:25 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

37h 25m2 stops Los Angeles Panama City Tocumen Intl

1:40 am - 10:57 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

26h 17m2 stops Panama City Tocumen Intl San Francisco

$2,335Copa Airlines

Wed, Apr 7 - Sat, Apr 17

8:40 am - 6:25 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

29h 45m3 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl Sao Paulo Guarulhos Intl

1:40 pm - 10:00 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

36h 20m3 stops Sao Paulo Guarulhos Intl Montreal Pierre Elliott Trudeau Intl Vancouver Intl

$2,555Copa Airlines

Thu, Dec 17 - Thu, Dec 31

5:34 pm - 12:25 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

25h 51m2 stops Los Angeles Panama City Tocumen Intl

1:40 am - 9:59 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

25h 19m2 stops Panama City Tocumen Intl Los Angeles

$2,742Copa Airlines

Sun, Dec 20 - Wed, Jan 6

6:40 pm - 9:45 amSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

34h 05m3 stops Minneapolis St Paul Orlando Sao Paulo Viracopos

8:20 pm - 8:59 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

29h 39m3 stops Sao Paulo Guarulhos Intl Atlanta Hartsfield-Jackson Toronto Pearson Intl

$2,888Multiple Airlines

Thu, Dec 17 - Sun, Jan 3

8:10 am - 3:20 pmSEA Seattle/Tacoma Intl-POA Porto Alegre Salgado Filho

26h 10m2 stops Miami Sao Paulo Guarulhos Intl

5:40 pm - 10:05 pmPOA Porto Alegre Salgado Filho-SEA Seattle/Tacoma Intl

33h 25m2 stops Santiago Arturo Merino Benitez Miami

$2,944Delta

Useful Info

Cheapest flight	$733

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.