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Cheap flights from Porto to District of Columbia from $339

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 12/18. 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

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
5:35 pm - 6:50 pmOPO-IAD
30h 15m1 stop
Scandinavian Airlines Logo
8:30 pm - 4:55 pmIAD-OPO
15h 25m1 stop
$519Scandinavian Airlines
Find Deal
Fri, Nov 21 - Thu, Dec 4
TAP AIR PORTUGAL Logo
9:00 am - 3:15 pmOPO-IAD
11h 15m1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 3:55 pmIAD-OPO
12h 25m1 stop
$565TAP AIR PORTUGAL
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Thu, Dec 11 - Fri, Dec 26
KLM Logo
6:00 am - 4:05 pmOPO-IAD
15h 05m1 stop
KLM Logo
6:30 pm - 3:30 pmIAD-OPO
16h 00m1 stop
$572KLM
Find Deal
Sat, Nov 22 - Sun, Apr 5
Delta Logo
6:30 am - 4:05 pmOPO-IAD
14h 35m1 stop
Delta Logo
6:50 pm - 10:30 amIAD-OPO
10h 40m1 stop
$573Delta
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Mon, Nov 24 - Mon, Dec 1
Delta Logo
6:30 am - 10:56 pmOPO-DCA
21h 26m2 stops
Delta Logo
11:13 am - 10:25 amDCA-OPO
18h 12m2 stops
$577Delta
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Fri, Nov 21 - Thu, Dec 4
KLM Logo
6:30 am - 7:08 pmOPO-IAD
17h 38m2 stops
KLM Logo
6:30 pm - 3:30 pmIAD-OPO
16h 00m1 stop
$582KLM
Find Deal
Fri, Nov 21 - Sun, Apr 5
United Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
United Airlines Logo
5:20 pm - 9:45 amIAD-OPO
11h 25m1 stop
$584United Airlines
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Thu, Nov 20 - Thu, Apr 2
Multiple Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
Multiple Airlines Logo
8:45 pm - 6:30 pmIAD-OPO
16h 45m1 stop
$587Multiple Airlines
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Sat, Nov 22 - Sun, Apr 5
Multiple Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
Multiple Airlines Logo
8:45 pm - 6:30 pmIAD-OPO
16h 45m1 stop
$589Multiple Airlines
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Sun, Nov 23 - Sat, Apr 4
United Airlines Logo
6:00 am - 11:49 amOPO-IAD
34h 49m2 stops
United Airlines Logo
12:50 pm - 11:40 amIAD-OPO
17h 50m2 stops
$594United Airlines
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Thu, Nov 27 - Thu, Dec 4

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
Dec 11
OPO9:00 amPorto
11h 15m
1 stop
IAD3:15 pmWashington, D.C. Dulles Intl
Dec 26
IAD10:30 pmWashington, D.C. Dulles Intl
12h 25m
1 stop
OPO3:55 pmPorto
$565
Find similar
TAP AIR PORTUGAL
Nov 22
OPO8:55 amPorto
17h 08m
2 stops
DCA9:03 pmWashington, D.C. Reagan-National
Apr 5
DCA10:45 amWashington, D.C. Reagan-National
19h 10m
1 stop
OPO10:55 amPorto
$1,155
Find similar
TAP AIR PORTUGAL
Apr 1
OPO9:00 amPorto
14h 59m
2 stops
DCA6:59 pmWashington, D.C. Reagan-National
Apr 5
DCA7:00 pmWashington, D.C. Reagan-National
11h 05m
1 stop
OPO11:05 amPorto
$1,236
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KLM flights from Porto to District of Columbia

Our best KLM deals on Porto to District of Columbia flight tickets
KLM
Nov 22
OPO6:00 amPorto
15h 05m
1 stop
IAD4:05 pmWashington, D.C. Dulles Intl
Apr 5
IAD6:30 pmWashington, D.C. Dulles Intl
16h 00m
1 stop
OPO3:30 pmPorto
$572
Find similar
KLM
Nov 21
OPO6:30 amPorto
17h 38m
2 stops
IAD7:08 pmWashington, D.C. Dulles Intl
Apr 5
IAD6:30 pmWashington, D.C. Dulles Intl
16h 00m
1 stop
OPO3:30 pmPorto
$582
Find similar
KLM
Nov 1
OPO6:00 amPorto
15h 05m
1 stop
IAD5:05 pmWashington, D.C. Dulles Intl
Nov 5
IAD6:50 pmWashington, D.C. Dulles Intl
10h 40m
1 stop
OPO10:30 amPorto
$620
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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 October 30, 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 11/21

5:35 pm-6:50 pm

1 stop30h 15m

Washington, D.C. Dulles Intl

Thu 12/4

8:30 pm-4:55 pm

1 stop15h 25m

$519

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 12/11

9:00 am-3:15 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Fri 12/26

10:30 pm-3:55 pm

1 stop12h 25m

$565

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/22

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sun 4/5

6:30 pm-3:30 pm

1 stop16h 00m

$572

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 11/24

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Mon 12/1

6:50 pm-10:30 am

1 stop10h 40m

$573

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Fri 11/21

6:30 am-10:56 pm

2 stops21h 26m

Washington, D.C. Reagan-National

Thu 12/4

11:13 am-10:25 am

2 stops18h 12m

$577

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 11/21

6:30 am-7:08 pm

2 stops17h 38m

Washington, D.C. Dulles Intl

Sun 4/5

6:30 pm-3:30 pm

1 stop16h 00m

$582

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 11/20

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Thu 4/2

5:20 pm-9:45 am

1 stop11h 25m

$584

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/22

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Sun 4/5

8:45 pm-6:30 pm

1 stop16h 45m

$587

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 11/23

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Sat 4/4

8:45 pm-6:30 pm

1 stop16h 45m

$589

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 11/27

6:00 am-11:49 am

2 stops34h 49m

Washington, D.C. Dulles Intl

Thu 12/4

12:50 pm-11:40 am

2 stops17h 50m

$594

Flights are sorted by cheapest round-trip flights 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 31% 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

Direct flights

None
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 $480Free CancellationRating
7.1
2,040 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.

An easier way to manage your District of Columbia trip

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