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Cheap flights from Washington to Porto Alegre from $440

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Porto Alegre departing on 11/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Washington to Porto Alegre

Cheap round-trip flights

United Airlines Logo
8:00 am - 4:10 pmSEA-POA
28h 10m3 stops
United Airlines Logo
5:10 pm - 11:31 amPOA-SEA
22h 21m2 stops
$510United Airlines
Find Deal
mar., sep. 9 - mar., sep. 23
United Airlines Logo
8:00 am - 2:35 pmSEA-POA
26h 35m3 stops
United Airlines Logo
5:10 pm - 8:42 pmPOA-SEA
31h 32m2 stops
$516United Airlines
Find Deal
mar., sep. 9 - mar., sep. 23
LATAM Airlines Logo
11:35 pm - 6:30 amSEA-POA
25h 55m2 stops
LATAM Airlines Logo
7:45 am - 12:14 amPOA-SEA
21h 29m2 stops
$837LATAM Airlines
Find Deal
jue., nov. 13 - jue., nov. 20
Logo
3:59 pm - 1:05 amSEA-POA
28h 06m2 stops
Logo
4:40 am - 12:31 pmPOA-SEA
36h 51m2 stops
$842
Find Deal
jue., nov. 13 - mié., nov. 19
Copa Airlines Logo
5:14 pm - 12:20 amSEA-POA
27h 06m2 stops
Copa Airlines Logo
1:25 am - 10:15 pmPOA-SEA
24h 50m2 stops
$890Copa Airlines
Find Deal
mar., sep. 9 - lun., sep. 22
Copa Airlines Logo
5:35 pm - 12:20 amSEA-POA
26h 45m2 stops
Copa Airlines Logo
1:25 am - 10:15 pmPOA-SEA
24h 50m2 stops
$920Copa Airlines
Find Deal
mar., sep. 9 - lun., sep. 22
Delta Logo
10:05 pm - 6:25 amPDX-POA
28h 20m2 stops
Delta Logo
6:40 am - 12:04 pmPOA-PDX
33h 24m2 stops
$1,110Delta
Find Deal
mar., sep. 30 - vie., oct. 3
United Airlines Logo
7:10 am - 4:10 pmSEA-POA
28h 00m2 stops
United Airlines Logo
2:05 pm - 6:10 pmPOA-SEA
33h 05m3 stops
$1,144United Airlines
Find Deal
jue., nov. 13 - jue., nov. 20
Logo
8:00 am - 5:00 pmSEA-POA
52h 00m3 stops
Logo
4:30 am - 11:40 pmPOA-SEA
48h 10m2 stops
$1,152
Find Deal
jue., nov. 13 - mié., nov. 19
LATAM Airlines Logo
6:00 am - 6:30 amSEA-POA
19h 30m2 stops
LATAM Airlines Logo
6:00 pm - 10:12 pmPOA-SEA
57h 12m3 stops
$3,705LATAM Airlines
Find Deal
vie., dic. 19 - dom., ene. 4

GOL flights from State of Washington to Porto Alegre

Our best GOL deals on State of Washington to Porto Alegre flight tickets
GOL
Dec 19
SEA11:54 amSeattle/Tacoma Intl
22h 46m
2 stops
POA3:40 pmPorto Alegre Salgado Filho
Jan 4
POA5:55 pmPorto Alegre Salgado Filho
23h 18m
2 stops
SEA12:13 pmSeattle/Tacoma Intl
$2,225
Find similar
GOL
Dec 18
SEA10:20 amSeattle/Tacoma Intl
27h 00m
2 stops
POA6:20 pmPorto Alegre Salgado Filho
Jan 3
POA5:55 pmPorto Alegre Salgado Filho
20h 35m
2 stops
SEA9:30 amSeattle/Tacoma Intl
$2,252
Find similar

United Airlines flights from State of Washington to Porto Alegre

Our best United Airlines deals on State of Washington to Porto Alegre flight tickets
United Airlines
Sep 9
SEA8:00 amSeattle/Tacoma Intl
28h 10m
3 stops
POA4:10 pmPorto Alegre Salgado Filho
Sep 23
POA5:10 pmPorto Alegre Salgado Filho
22h 21m
2 stops
SEA11:31 amSeattle/Tacoma Intl
$510
Find similar
United Airlines
Sep 9
SEA8:00 amSeattle/Tacoma Intl
26h 35m
3 stops
POA2:35 pmPorto Alegre Salgado Filho
Sep 23
POA5:10 pmPorto Alegre Salgado Filho
31h 32m
2 stops
SEA8:42 pmSeattle/Tacoma Intl
$516
Find similar
United Airlines
Nov 13
SEA7:10 amSeattle/Tacoma Intl
28h 00m
2 stops
POA4:10 pmPorto Alegre Salgado Filho
Nov 20
POA2:05 pmPorto Alegre Salgado Filho
33h 05m
3 stops
SEA6:10 pmSeattle/Tacoma Intl
$1,144
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Porto Alegre that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated agosto 13, 2025.
Use the filters below to find and compare flights from Washington to Porto Alegre that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

mar. 9/9

8:00 am-4:10 pm

3 stops28h 10m

Porto Alegre Salgado Filho

mar. 9/23

5:10 pm-11:31 am

2 stops22h 21m

$510

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

mar. 9/9

8:00 am-2:35 pm

3 stops26h 35m

Porto Alegre Salgado Filho

mar. 9/23

5:10 pm-8:42 pm

2 stops31h 32m

$516

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

jue. 11/13

11:35 pm-6:30 am

2 stops25h 55m

Porto Alegre Salgado Filho

jue. 11/20

7:45 am-12:14 am

2 stops21h 29m

$837

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

jue. 11/13

3:59 pm-1:05 am

2 stops28h 06m

Porto Alegre Salgado Filho

mié. 11/19

4:40 am-12:31 pm

2 stops36h 51m

$842

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

mar. 9/9

5:14 pm-12:20 am

2 stops27h 06m

Porto Alegre Salgado Filho

lun. 9/22

1:25 am-10:15 pm

2 stops24h 50m

$890

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

mar. 9/9

5:35 pm-12:20 am

2 stops26h 45m

Porto Alegre Salgado Filho

lun. 9/22

1:25 am-10:15 pm

2 stops24h 50m

$920

PortlandPorto Alegre

PDX - POA

PDXPOA

Portland

mar. 9/30

10:05 pm-6:25 am

2 stops28h 20m

Porto Alegre Salgado Filho

vie. 10/3

6:40 am-12:04 pm

2 stops33h 24m

$1,110

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

jue. 11/13

7:10 am-4:10 pm

2 stops28h 00m

Porto Alegre Salgado Filho

jue. 11/20

2:05 pm-6:10 pm

3 stops33h 05m

$1,144

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

jue. 11/13

8:00 am-5:00 pm

3 stops52h 00m

Porto Alegre Salgado Filho

mié. 11/19

4:30 am-11:40 pm

2 stops48h 10m

$1,152

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

vie. 12/19

6:00 am-6:30 am

2 stops19h 30m

Porto Alegre Salgado Filho

dom. 1/4

6:00 pm-10:12 pm

3 stops57h 12m

$3,705

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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How to get the cheapest flight ticket from State of Washington to Porto Alegre

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Porto Alegre?

Our data shows that Thursday is the least expensive day to fly to Porto Alegre. Tickets to fly out on this day can be as low as $858. On the other hand, Saturday is the most expensive day to depart from State of Washington because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,654.

What is the cheapest time of day to depart on your flight to Porto Alegre?

Our most recent data shows that the best time of day to fly to Porto Alegre is in the evening. Flights from State of Washington to Porto Alegre during this time can be as low as $869. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,038 on average. Flights to Porto Alegre from State of Washington in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

Cheap State of Washington to Porto Alegre flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Porto Alegre

Best Price Found

$440

Fastest flight time

19h 30m

Direct flights

None

Airports in Porto Alegre

1 airport
The best one-way flight to Porto Alegre from State of Washington in the past 72 hours is $440. The best round-trip flight deal from State of Washington to Porto Alegre found on momondo in the last 72 hours is $510.
The fastest flight from State of Washington to Porto Alegre takes 19h 30m
There are no direct flights from State of Washington to Porto Alegre. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - Porto Alegre Salgado Filho Airport and Portland Airport - Porto Alegre Salgado Filho Airport.
There is 1 airport near Porto Alegre: Porto Alegre Salgado Filho (POA)
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  • When did momondo last update prices for flights from Washington to Porto Alegre Salgado Filho Airport?

    Prices for flights from Washington to Porto Alegre Salgado Filho Airport are updated daily.

  • How old do you have to be to fly from Washington to Porto Alegre Salgado Filho Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Porto Alegre Salgado Filho Airport.

  • What documentation or ID do you need to fly to Porto Alegre Salgado Filho Airport?

    The travel and health documents you'll need for your trip to Porto Alegre Salgado Filho Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Porto Alegre Salgado Filho Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from State of Washington to Porto Alegre

Compare and see reviews for airlines that fly from State of Washington to Porto Alegre with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $798Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Porto Alegre?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Porto Alegre. momondo saves you time and could save you money on your trip.

Can I find flights from Washington to Porto Alegre with flexible booking policies on momondo?

Yes. All flights to Porto Alegre from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington to Porto Alegre?

momondo provides multiple filters to help you find the best flight to Porto Alegre from Washington. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington to Porto Alegre right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington to Porto Alegre flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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