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Cheap flights from Washington, D.C. to Porto Alegre from $420

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, D.C. to Porto Alegre departing on 8/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Travel Warning: Due to flooding, the airport may be currently closed. Check local travel advisories before booking.

Find the cheapest flights from Washington, D.C. to Porto Alegre

Cheap round-trip flights

Enter your travel dates to find the best prices.
Copa Airlines Logo
2:25 am - 12:15 am
IAD
-
POA
20h 50m
1 stop
Copa Airlines Logo
1:15 am - 4:21 am
POA
-
IAD
28h 06m
1 stop
$650Copa Airlines
Tue, Aug 11 - Tue, Aug 25
Copa Airlines Logo
2:25 am - 12:20 am
IAD
-
POA
20h 55m
1 stop
Copa Airlines Logo
1:20 am - 4:20 am
POA
-
IAD
28h 00m
1 stop
$690Copa Airlines
Thu, Sep 10 - Thu, Sep 24
Copa Airlines Logo
4:34 pm - 12:20 am
IAD
-
POA
30h 46m
1 stop
Copa Airlines Logo
1:20 am - 4:20 am
POA
-
IAD
28h 00m
1 stop
$765Copa Airlines
Tue, Sep 15 - Sun, Sep 27
United Airlines Logo
6:15 am - 4:20 pm
IAD
-
POA
33h 05m
2 stops
United Airlines Logo
3:25 pm - 6:35 am
POA
-
IAD
16h 10m
1 stop
$771United Airlines
Mon, Oct 5 - Wed, Oct 28
LATAM Airlines Logo
3:13 pm - 7:20 pm
IAD
-
POA
27h 07m
2 stops
LATAM Airlines Logo
12:10 pm - 11:45 am
POA
-
IAD
24h 35m
2 stops
$781LATAM Airlines
Tue, Sep 15 - Mon, Sep 28
Copa Airlines Logo
6:26 am - 12:15 am
IAD
-
POA
16h 49m
1 stop
Copa Airlines Logo
1:15 am - 12:33 am
POA
-
IAD
24h 18m
1 stop
$790Copa Airlines
Sun, Aug 9 - Sat, Aug 22
Multiple Airlines Logo
2:25 am - 12:15 am
IAD
-
POA
20h 50m
1 stop
Multiple Airlines Logo
1:15 am - 9:50 am
POA
-
IAD
33h 35m
2 stops
$795Multiple Airlines
Thu, Aug 13 - Sat, Aug 29
Multiple Airlines Logo
2:25 am - 12:15 am
IAD
-
POA
20h 50m
1 stop
Multiple Airlines Logo
1:15 am - 9:50 am
POA
-
IAD
33h 35m
2 stops
$796Multiple Airlines
Tue, Aug 11 - Sat, Aug 22
LATAM Airlines Logo
6:26 pm - 11:25 pm
IAD
-
POA
27h 59m
2 stops
LATAM Airlines Logo
10:00 pm - 11:45 am
POA
-
IAD
38h 45m
2 stops
$846LATAM Airlines
Tue, Sep 15 - Mon, Sep 28
LATAM Airlines Logo
7:19 pm - 5:00 pm
IAD
-
POA
44h 41m
2 stops
LATAM Airlines Logo
7:35 pm - 6:28 pm
POA
-
IAD
47h 53m
2 stops
$853LATAM Airlines
Wed, Aug 12 - Wed, Aug 26

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Copa Airlines flights from Washington, D.C. to Porto Alegre

Our best Copa Airlines deals on Washington, D.C. to Porto Alegre flight tickets
Copa Airlines
Aug 11
IAD2:25 amWashington, D.C. Dulles Intl
20h 50m
1 stop
POA12:15 amPorto Alegre Salgado Filho
Aug 25
POA1:15 amPorto Alegre Salgado Filho
28h 06m
1 stop
IAD4:21 amWashington, D.C. Dulles Intl
$650
Copa Airlines
Sep 10
IAD2:25 amWashington, D.C. Dulles Intl
20h 55m
1 stop
POA12:20 amPorto Alegre Salgado Filho
Sep 24
POA1:20 amPorto Alegre Salgado Filho
28h 00m
1 stop
IAD4:20 amWashington, D.C. Dulles Intl
$690
Copa Airlines
Sep 15
IAD4:34 pmWashington, D.C. Dulles Intl
30h 46m
1 stop
POA12:20 amPorto Alegre Salgado Filho
Sep 27
POA1:20 amPorto Alegre Salgado Filho
28h 00m
1 stop
IAD4:20 amWashington, D.C. Dulles Intl
$765

United Airlines flights from Washington, D.C. to Porto Alegre

Our best United Airlines deals on Washington, D.C. to Porto Alegre flight tickets
United Airlines
Oct 5
IAD6:15 amWashington, D.C. Dulles Intl
33h 05m
2 stops
POA4:20 pmPorto Alegre Salgado Filho
Oct 28
POA3:25 pmPorto Alegre Salgado Filho
16h 10m
1 stop
IAD6:35 amWashington, D.C. Dulles Intl
$771
United Airlines
Aug 12
IAD10:27 pmWashington, D.C. Dulles Intl
38h 53m
2 stops
POA2:20 pmPorto Alegre Salgado Filho
Aug 26
POA5:10 pmPorto Alegre Salgado Filho
14h 15m
1 stop
IAD6:25 amWashington, D.C. Dulles Intl
$1,227
United Airlines
Sep 11
IAD3:02 pmWashington, D.C. Dulles Intl
17h 53m
2 stops
POA9:55 amPorto Alegre Salgado Filho
Sep 25
POA5:10 pmPorto Alegre Salgado Filho
14h 15m
1 stop
IAD6:25 amWashington, D.C. Dulles Intl
$1,247

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 June 29, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Porto Alegre that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Tue 8/11

2:25 am-12:15 am

1 stop20h 50m

Porto Alegre Salgado Filho

Tue 8/25

1:15 am-4:21 am

1 stop28h 06m

$650

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Thu 9/10

2:25 am-12:20 am

1 stop20h 55m

Porto Alegre Salgado Filho

Thu 9/24

1:20 am-4:20 am

1 stop28h 00m

$690

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Tue 9/15

4:34 pm-12:20 am

1 stop30h 46m

Porto Alegre Salgado Filho

Sun 9/27

1:20 am-4:20 am

1 stop28h 00m

$765

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Mon 10/5

6:15 am-4:20 pm

2 stops33h 05m

Porto Alegre Salgado Filho

Wed 10/28

3:25 pm-6:35 am

1 stop16h 10m

$771

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Tue 9/15

3:13 pm-7:20 pm

2 stops27h 07m

Porto Alegre Salgado Filho

Mon 9/28

12:10 pm-11:45 am

2 stops24h 35m

$781
Quickest round-trip

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Sun 8/9

6:26 am-12:15 am

1 stop16h 49m

Porto Alegre Salgado Filho

Sat 8/22

1:15 am-12:33 am

1 stop24h 18m

$790

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Thu 8/13

2:25 am-12:15 am

1 stop20h 50m

Porto Alegre Salgado Filho

Sat 8/29

1:15 am-9:50 am

2 stops33h 35m

$795

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Tue 8/11

2:25 am-12:15 am

1 stop20h 50m

Porto Alegre Salgado Filho

Sat 8/22

1:15 am-9:50 am

2 stops33h 35m

$796

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Tue 9/15

6:26 pm-11:25 pm

2 stops27h 59m

Porto Alegre Salgado Filho

Mon 9/28

10:00 pm-11:45 am

2 stops38h 45m

$846

Washington, D.C.Porto Alegre

IAD - POA

IADPOA

Washington, D.C. Dulles Intl

Wed 8/12

7:19 pm-5:00 pm

2 stops44h 41m

Porto Alegre Salgado Filho

Wed 8/26

7:35 pm-6:28 pm

2 stops47h 53m

$853

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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See travel insights to Porto Alegre from

How to get the cheapest flight ticket from Washington, D.C. 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 month to fly to Porto Alegre?

The cheapest month to fly to Porto Alegre from Washington, D.C. is in March. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you’re not able to fly to Porto Alegre in March, then January is your next best option. Flight prices from Washington, D.C. to Porto Alegre during January average around $0.

Can stopping save me money on Washington, D.C. to Porto Alegre flights?

You could potentially save up to 21% on your flight if you consider stops on a Washington, D.C. to Porto Alegre flight.

When to book flights from Washington, D.C. to Porto Alegre

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Porto Alegre according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. to Porto Alegre (WAS to POA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Porto Alegre

Fastest flight time

21h 40m

Direct flights

None
The fastest flight from Washington, D.C. to Porto Alegre takes 21h 40m
There are no direct flights from Washington, D.C. to Porto Alegre. There are no popular flight routes from Washington, D.C. to Porto Alegre.
Search flight deals

Frequently asked questions about flying from Washington, D.C. to Porto Alegre

  • How far is Washington, D.C. to Porto Alegre Salgado Filho by plane?

    The straight-line distance from Washington, D.C. to Porto Alegre Salgado Filho is 5041.2 mi. By plane, this route typically takes 21h 40m.

  • When did momondo last update prices for flights from Washington, D.C. to Porto Alegre Salgado Filho Airport?

    Prices for flights from Washington, D.C. to Porto Alegre Salgado Filho Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington, D.C. to Porto Alegre Salgado Filho Airport?

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. 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 required for your trip to Porto Alegre Salgado Filho Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Alegre Salgado Filho Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Washington, D.C. to Porto Alegre?

Best airlines flying from Washington, D.C. to Porto Alegre

Compare and see reviews for airlines that fly from Washington, D.C. to Porto Alegre with momondo
Airline
Rating
Free Cancellation
Price
Copa AirlinesPriceFrom $485Free CancellationRating
7.6
1,566 reviews
Search Copa Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Porto Alegre?

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

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

Yes. momondo enables you to select and highlight flights to Porto Alegre from Washington, D.C. with this policy.

How can momondo help me find flights from Washington, D.C. to Porto Alegre?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Porto Alegre from Washington, D.C..

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

If you are not ready to book a flight from Washington, D.C. to Porto Alegre now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Porto Alegre and let you know when they change.

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