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Cheap flights from Porto to District of Columbia from $358

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 District of Columbia departing on 3/24. 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
0 bags

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Find the cheapest flights from Porto to District of Columbia

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
2:20 pm - 9:00 pm
OPO
-
IAD
11h 40m1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 5:00 pm
IAD
-
OPO
13h 30m1 stop
$506TAP AIR PORTUGAL
Fri, Jan 30 - Fri, Feb 6
TAP AIR PORTUGAL Logo
7:00 am - 3:15 pm
OPO
-
IAD
13h 15m1 stop
TAP AIR PORTUGAL Logo
5:30 pm - 9:55 am
IAD
-
OPO
11h 25m1 stop
$508TAP AIR PORTUGAL
Thu, Jan 29 - Thu, Feb 5
TAP AIR PORTUGAL Logo
8:55 am - 10:00 pm
OPO
-
IAD
17h 05m1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 7:00 pm
IAD
-
OPO
15h 25m1 stop
$520TAP AIR PORTUGAL
Sun, Mar 15 - Mon, Apr 13
Scandinavian Airlines Logo
10:25 am - 6:15 pm
OPO
-
IAD
35h 50m1 stop
Scandinavian Airlines Logo
8:20 pm - 11:00 am
IAD
-
OPO
33h 40m1 stop
$583Scandinavian Airlines
Wed, Mar 18 - Mon, Apr 13
United Airlines Logo
6:00 am - 4:50 pm
OPO
-
IAD
14h 50m1 stop
United Airlines Logo
5:37 pm - 9:45 am
IAD
-
OPO
11h 08m1 stop
$591United Airlines
Thu, Mar 12 - Sun, Apr 12
United Airlines Logo
6:00 am - 3:50 pm
OPO
-
IAD
14h 50m1 stop
United Airlines Logo
8:20 am - 11:40 am
IAD
-
OPO
22h 20m2 stops
$596United Airlines
Sat, Jan 31 - Sat, Feb 7
United Airlines Logo
6:00 am - 8:59 pm
OPO
-
DCA
18h 59m2 stops
United Airlines Logo
7:00 pm - 9:45 am
DCA
-
OPO
9h 45m1 stop
$597United Airlines
Thu, Mar 12 - Mon, Apr 13
SWISS Logo
11:55 am - 5:40 pm
OPO
-
IAD
33h 45m1 stop
SWISS Logo
8:20 pm - 11:25 am
IAD
-
OPO
34h 05m1 stop
$599SWISS
Sat, Mar 14 - Tue, Apr 14
Delta Logo
5:00 am - 4:05 pm
OPO
-
IAD
16h 05m1 stop
Delta Logo
12:23 pm - 10:25 am
IAD
-
OPO
17h 02m2 stops
$600Delta
Thu, Jan 29 - Thu, Feb 5
Delta Logo
11:15 am - 10:48 pm
OPO
-
DCA
16h 33m2 stops
Delta Logo
11:11 am - 10:25 am
DCA
-
OPO
18h 14m2 stops
$606Delta
Thu, Jan 29 - Thu, Feb 5

TAP AIR PORTUGAL flights from Porto to District of Columbia

Our best TAP AIR PORTUGAL deals on Porto to District of Columbia flight tickets
TAP AIR PORTUGAL
Jan 30
OPO2:20 pmPorto
11h 40m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
Feb 6
IAD10:30 pmWashington, D.C. Dulles Intl
13h 30m
1 stop
OPO5:00 pmPorto
$506
Find similar
TAP AIR PORTUGAL
Jan 29
OPO7:00 amPorto
13h 15m
1 stop
IAD3:15 pmWashington, D.C. Dulles Intl
Feb 5
IAD5:30 pmWashington, D.C. Dulles Intl
11h 25m
1 stop
OPO9:55 amPorto
$508
Find similar
TAP AIR PORTUGAL
Jan 15
OPO6:00 pmPorto
32h 00m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
Jan 28
IAD10:30 pmWashington, D.C. Dulles Intl
14h 30m
1 stop
OPO6:00 pmPorto
$517
Find similar

Scandinavian Airlines flights from Porto to District of Columbia

Our best Scandinavian Airlines deals on Porto to District of Columbia flight tickets
Scandinavian Airlines
Mar 18
OPO10:25 amPorto
35h 50m
1 stop
IAD6:15 pmWashington, D.C. Dulles Intl
Apr 13
IAD8:20 pmWashington, D.C. Dulles Intl
33h 40m
1 stop
OPO11:00 amPorto
$583
Find similar
Scandinavian Airlines
Mar 18
OPO10:25 amPorto
35h 50m
1 stop
IAD6:15 pmWashington, D.C. Dulles Intl
Apr 11
IAD8:20 pmWashington, D.C. Dulles Intl
15h 45m
1 stop
OPO5:05 pmPorto
$683
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Porto to District of Columbia 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 December 18, 2025.
Use the filters below to find and compare flights from Porto to District of Columbia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 1/30

2:20 pm-9:00 pm

1 stop11h 40m

Washington, D.C. Dulles Intl

Fri 2/6

10:30 pm-5:00 pm

1 stop13h 30m

$506

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/29

7:00 am-3:15 pm

1 stop13h 15m

Washington, D.C. Dulles Intl

Thu 2/5

5:30 pm-9:55 am

1 stop11h 25m

$508

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 3/15

8:55 am-10:00 pm

1 stop17h 05m

Washington, D.C. Dulles Intl

Mon 4/13

10:35 pm-7:00 pm

1 stop15h 25m

$520

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 3/18

10:25 am-6:15 pm

1 stop35h 50m

Washington, D.C. Dulles Intl

Mon 4/13

8:20 pm-11:00 am

1 stop33h 40m

$583

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 3/12

6:00 am-4:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Sun 4/12

5:37 pm-9:45 am

1 stop11h 08m

$591

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 1/31

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Sat 2/7

8:20 am-11:40 am

2 stops22h 20m

$596

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 3/12

6:00 am-8:59 pm

2 stops18h 59m

Washington, D.C. Reagan-National

Mon 4/13

7:00 pm-9:45 am

1 stop9h 45m

$597

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 3/14

11:55 am-5:40 pm

1 stop33h 45m

Washington, D.C. Dulles Intl

Tue 4/14

8:20 pm-11:25 am

1 stop34h 05m

$599

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/29

5:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Thu 2/5

12:23 pm-10:25 am

2 stops17h 02m

$600

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 1/29

11:15 am-10:48 pm

2 stops16h 33m

Washington, D.C. Reagan-National

Thu 2/5

11:11 am-10:25 am

2 stops18h 14m

$606

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 District of Columbia from

How to get the cheapest flight ticket from Porto to District of Columbia

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 District of Columbia?

The cheapest day to depart on your flight to District of Columbia is on a Thursday when prices can be found for as low as $616. This is often the case because there is less demand to fly during this day of the week. On the other hand, Saturday is the most expensive day to depart from Porto because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,018.

What is the cheapest time of day to depart on your flight to District of Columbia?

Flying to District of Columbia from Porto in the morning is the least expensive time of day to depart. momondo users have found prices as low as $735 when looking at flights departing in the morning. Flights to District of Columbia are more costly in the afternoon, with an average ticket price of $1,068. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Porto to District of Columbia flights?

You could potentially save up to 69% on your flight if you consider stops on a Porto to District of Columbia flight.

Cheap Porto to District of Columbia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Porto to District of Columbia

Fastest flight time

11h 40m

Direct flights

None
The fastest flight from Porto to District of Columbia takes 11h 40m
There are no direct flights from Porto to District of Columbia. There are no popular flight routes from Porto to District of Columbia.
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  • When did momondo last update prices for flights from Porto Airport to District of Columbia?

    Prices for flights from Porto Airport to District of Columbia are refreshed on a daily basis.

  • How many operators does momondo search for flights from Porto Airport to District of Columbia?

  • How old do you have to be to fly from Porto Airport to District of Columbia?

    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 District of Columbia.

  • What documentation or ID do you need to fly to District of Columbia?

    The travel and health documents you'll need for your trip to District of Columbia 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 District of Columbia. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Porto to District of Columbia

Compare and see reviews for airlines that fly from Porto to District of Columbia with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $492Free CancellationRating
7.2
2,091 reviews
Search TAP AIR PORTUGAL flights

Why use momondo?

Why should I use momondo to find a flight deal from Porto to District of Columbia?

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

Can I find flights from Porto to District of Columbia with flexible booking policies on momondo?

All flight searches from Porto to District of Columbia on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Porto to District of Columbia?

Once you have performed a search for Porto to District of Columbia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to District of Columbia, momondo offers a useful price alert feature which will track prices for flights to District of Columbia from Porto and alert you when they change.

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