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Cheap flights from Porto to Washington, D.C. from $381

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Porto to Washington, D.C. departing on 3/23. 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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Cheap round-trip flights

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United Airlines Logo
6:00 am - 10:43 pm
OPO
-
DCA
21h 43m
2 stops
United Airlines Logo
4:30 pm - 9:45 am
DCA
-
OPO
12h 15m
1 stop
$467United Airlines
mié., abr. 15 - dom., abr. 19
Multiple Airlines Logo
6:00 am - 8:55 am
OPO
-
DCA
31h 55m
2 stops
Multiple Airlines Logo
6:00 am - 11:15 am
DCA
-
OPO
24h 15m
2 stops
$469Multiple Airlines
mié., feb. 25 - mié., mar. 4
Delta Logo
5:00 am - 7:56 pm
OPO
-
DCA
19h 56m
2 stops
Delta Logo
12:05 pm - 10:30 am
DCA
-
OPO
17h 25m
2 stops
$470Delta
jue., feb. 12 - mié., feb. 25
Air Canada Logo
6:00 am - 7:53 pm
OPO
-
DCA
18h 53m
2 stops
Air Canada Logo
6:00 am - 6:30 pm
DCA
-
OPO
31h 30m
2 stops
$473Air Canada
mié., abr. 15 - dom., abr. 19
Air Canada Logo
6:00 am - 7:53 pm
OPO
-
DCA
18h 53m
2 stops
Air Canada Logo
11:05 am - 6:30 pm
DCA
-
OPO
26h 25m
2 stops
$474Air Canada
mié., abr. 15 - dom., abr. 19
Delta Logo
5:00 am - 8:32 pm
OPO
-
DCA
20h 32m
2 stops
Delta Logo
12:05 pm - 10:30 am
DCA
-
OPO
17h 25m
2 stops
$477Delta
jue., feb. 12 - mié., feb. 25
United Airlines Logo
12:35 pm - 7:31 pm
OPO
-
DCA
11h 56m
1 stop
United Airlines Logo
4:30 pm - 9:45 am
DCA
-
OPO
12h 15m
1 stop
$488United Airlines
mié., abr. 15 - dom., abr. 19
United Airlines Logo
12:45 pm - 9:59 pm
OPO
-
DCA
14h 14m
1 stop
United Airlines Logo
6:00 pm - 9:30 am
DCA
-
OPO
11h 30m
1 stop
$490United Airlines
vie., feb. 27 - dom., mar. 15
United Airlines Logo
12:35 pm - 7:31 pm
OPO
-
DCA
11h 56m
1 stop
United Airlines Logo
4:30 pm - 9:45 am
DCA
-
OPO
12h 15m
1 stop
$492United Airlines
mié., abr. 15 - dom., abr. 19
American Airlines Logo
8:20 am - 6:33 pm
OPO
-
DCA
15h 13m
2 stops
American Airlines Logo
6:14 pm - 11:45 am
DCA
-
OPO
12h 31m
2 stops
$503American Airlines
jue., feb. 12 - mié., feb. 25

United Airlines flights from Porto to Washington, D.C. Reagan-National Airport

Our best United Airlines deals on Porto to Washington, D.C. Reagan-National Airport flight tickets
United Airlines
Apr 15
OPO6:00 amPorto
21h 43m
2 stops
DCA10:43 pmWashington, D.C. Reagan-National
Apr 19
DCA4:30 pmWashington, D.C. Reagan-National
12h 15m
1 stop
OPO9:45 amPorto
$467
United Airlines
Apr 15
OPO12:35 pmPorto
11h 56m
1 stop
DCA7:31 pmWashington, D.C. Reagan-National
Apr 19
DCA4:30 pmWashington, D.C. Reagan-National
12h 15m
1 stop
OPO9:45 amPorto
$488
United Airlines
Feb 27
OPO12:45 pmPorto
14h 14m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Mar 15
DCA6:00 pmWashington, D.C. Reagan-National
11h 30m
1 stop
OPO9:30 amPorto
$490

Delta flights from Porto to Washington, D.C. Reagan-National Airport

Our best Delta deals on Porto to Washington, D.C. Reagan-National Airport flight tickets
Delta
Feb 12
OPO5:00 amPorto
19h 56m
2 stops
DCA7:56 pmWashington, D.C. Reagan-National
Feb 25
DCA12:05 pmWashington, D.C. Reagan-National
17h 25m
2 stops
OPO10:30 amPorto
$470
Delta
Feb 12
OPO5:00 amPorto
20h 32m
2 stops
DCA8:32 pmWashington, D.C. Reagan-National
Feb 25
DCA12:05 pmWashington, D.C. Reagan-National
17h 25m
2 stops
OPO10:30 amPorto
$477
Delta
May 5
OPO5:00 amPorto
20h 55m
2 stops
DCA8:55 pmWashington, D.C. Reagan-National
May 10
DCA5:00 pmWashington, D.C. Reagan-National
17h 25m
2 stops
OPO3:25 pmPorto
$589

momondo Fare Finder

 
Customize your flight search to find flights from Porto to Washington, D.C. Reagan-National Airport 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 enero 29, 2026.
Use the filters below to find and compare flights from Porto to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

mié. 4/15

6:00 am-10:43 pm

2 stops21h 43m

Washington, D.C. Reagan-National

dom. 4/19

4:30 pm-9:45 am

1 stop12h 15m

$467

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

mié. 2/25

6:00 am-8:55 am

2 stops31h 55m

Washington, D.C. Reagan-National

mié. 3/4

6:00 am-11:15 am

2 stops24h 15m

$469

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

jue. 2/12

5:00 am-7:56 pm

2 stops19h 56m

Washington, D.C. Reagan-National

mié. 2/25

12:05 pm-10:30 am

2 stops17h 25m

$470

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

mié. 4/15

6:00 am-7:53 pm

2 stops18h 53m

Washington, D.C. Reagan-National

dom. 4/19

6:00 am-6:30 pm

2 stops31h 30m

$473

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

mié. 4/15

6:00 am-7:53 pm

2 stops18h 53m

Washington, D.C. Reagan-National

dom. 4/19

11:05 am-6:30 pm

2 stops26h 25m

$474

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

jue. 2/12

5:00 am-8:32 pm

2 stops20h 32m

Washington, D.C. Reagan-National

mié. 2/25

12:05 pm-10:30 am

2 stops17h 25m

$477

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

mié. 4/15

12:35 pm-7:31 pm

1 stop11h 56m

Washington, D.C. Reagan-National

dom. 4/19

4:30 pm-9:45 am

1 stop12h 15m

$488

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

vie. 2/27

12:45 pm-9:59 pm

1 stop14h 14m

Washington, D.C. Reagan-National

dom. 3/15

6:00 pm-9:30 am

1 stop11h 30m

$490

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

mié. 4/15

12:35 pm-7:31 pm

1 stop11h 56m

Washington, D.C. Reagan-National

dom. 4/19

4:30 pm-9:45 am

1 stop12h 15m

$492

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

jue. 2/12

8:20 am-6:33 pm

2 stops15h 13m

Washington, D.C. Reagan-National

mié. 2/25

6:14 pm-11:45 am

2 stops12h 31m

$503

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Porto to Washington, D.C. Reagan-National Airport

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

Can stopping save me money on Porto to Washington, D.C. Reagan-National Airport flights?

You could potentially save up to 29% on your flight if you consider stops on a Porto to Washington, D.C. Reagan-National Airport flight.

When to book flights from Porto to Washington, D.C. Reagan-National Airport

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

Cheap Porto to Washington, D.C. Reagan-National Airport (OPO to DCA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Porto to Washington, D.C. Reagan-National Airport

Fastest flight time

15h 38m

Direct flights

None
The fastest flight from Porto to Washington, D.C. Reagan-National Airport takes 15h 38m
There are no direct flights from Porto to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Porto to Washington, D.C. Reagan-National Airport.
Search flight deals

  • How far is Porto to Washington, D.C. Reagan-National by plane?

    The straight-line distance from Porto to Washington, D.C. Reagan-National is 3524.8 mi. Typically, this will take 15h 38m by plane in normal conditions.

  • When did momondo last update prices for flights from Porto Airport to Washington, D.C. Reagan-National Airport?

    Prices for flights from Porto Airport to Washington, D.C. Reagan-National Airport were last updated today.

  • How old do you have to be to fly from Porto Airport to Washington, D.C. Reagan-National 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 Porto Airport to Washington, D.C. Reagan-National Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

    The required travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Fairfax
Linthicum Heights
Bethesda
Reston

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Porto to Washington, D.C.. Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Porto to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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 Washington, D.C. from Porto.

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

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

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