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$349+ Cheap flights from Reagan-National (DCA) to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — OPO
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap flight deals from Reagan-National to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated septiembre 11, 2025.

Round-trip from

$552
(FlightHub)

One-way from

$349
(Kiwi.com)

Popular in

October

Cheapest in

January

Average price

$783
From Washington, D.C. Reagan-National to Porto
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One-way flight from Washington, D.C. Reagan-National to Porto
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Reagan-National to Porto

Cheapest flights from Reagan-National to Porto
Explore the most affordable flight options available from Reagan-National to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This Air Canada deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/138:40 pmDCA - OPO
2 stops33h 35mAir Canada
mar. 10/216:00 amOPO - DCA
2 stops21h 34mAir Canada
Deal found 9/10$575
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/209:40 amDCA - OPO
2 stops24h 25mMultiple Airlines
mié. 11/57:35 amOPO - DCA
3 stops19h 21mMultiple Airlines
Deal found 9/10$577
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/71:44 pmDCA - OPO
2 stops12h 56mAmerican Airlines
dom. 11/168:20 amOPO - DCA
2 stops18h 10mAmerican Airlines
Deal found 9/10$579
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/146:45 pmDCA - OPO
2 stops15h 45mDelta
mar. 10/216:15 amOPO - DCA
2 stops15h 55mDelta
Deal found 9/11$587
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/78:29 amDCA - OPO
2 stops21h 11mDelta
mar. 11/411:10 amOPO - DCA
2 stops16h 52mDelta
Deal found 9/10$599
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/171:00 pmDCA - OPO
1 stop12h 05mUnited Airlines
mar. 9/2312:50 pmOPO - DCA
2 stops30h 32mUnited Airlines
Deal found 9/10$600
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/127:00 pmDCA - OPO
1 stop9h 45mUnited Airlines
mar. 10/216:00 amOPO - DCA
2 stops17h 03mUnited Airlines
Deal found 9/10$620
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/194:30 pmDCA - OPO
1 stop12h 00mUnited Airlines
mar. 12/166:00 amOPO - DCA
2 stops18h 07mUnited Airlines
Deal found 9/11$624
This Air Canada deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/126:59 amDCA - OPO
2 stops23h 16mAir Canada
mar. 10/216:00 amOPO - DCA
2 stops31h 59mAir Canada
Deal found 9/10$645
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/71:15 pmDCA - OPO
2 stops16h 25mDelta
dom. 11/211:15 amOPO - DCA
2 stops16h 47mDelta
Deal found 9/10$650

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National to Porto 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, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Porto that are best for you.

Fly from

Reagan-National

Fly to

Porto

Route

Depart

Return

Price

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

sáb. 10/25

2:00 pm-11:30 am

2 stops16h 30m

Porto

sáb. 11/1

6:00 am-10:59 pm

2 stops20h 59m

$579

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

vie. 11/7

1:44 pm-7:40 am

2 stops12h 56m

Porto

dom. 11/16

8:20 am-9:30 pm

2 stops18h 10m

$579

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mar. 10/7

8:29 am-10:40 am

2 stops21h 11m

Porto

mar. 11/4

11:10 am-11:02 pm

2 stops16h 52m

$599

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

lun. 10/13

5:00 pm-5:55 pm

2 stops19h 55m

Porto

lun. 10/20

11:30 am-4:00 pm

2 stops33h 30m

$600

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mié. 10/22

1:15 pm-10:40 am

2 stops16h 25m

Porto

vie. 10/31

6:30 am-10:07 pm

2 stops19h 37m

$600

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

dom. 10/12

7:00 pm-9:45 am

1 stop9h 45m

Porto

mar. 10/21

6:00 am-6:03 pm

2 stops17h 03m

$620

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mié. 11/19

4:30 pm-9:30 am

1 stop12h 00m

Porto

mar. 12/16

6:00 am-7:07 pm

2 stops18h 07m

$624

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mié. 11/19

4:30 pm-9:30 am

1 stop12h 00m

Porto

sáb. 12/13

6:00 am-7:35 pm

2 stops18h 35m

$659

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

jue. 11/20

1:44 pm-7:40 am

2 stops12h 56m

Porto

dom. 12/14

8:20 am-7:11 pm

2 stops15h 51m

$669

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

jue. 11/20

12:26 pm-7:40 am

2 stops14h 14m

Porto

mar. 12/16

8:20 am-9:30 pm

2 stops18h 10m

$674

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 20 results
1
2

Best time to book a flight from Reagan-National to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Reagan-National with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Reagan-National Airport to Porto

What is the cheapest time of day to fly from DCA to OPO?

Find hourly flight availability from Reagan-National to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 11, 2025.

One of the essential ways to save on airfare from Washington, D.C. Reagan-National Airport to Porto is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 40% on airfare.

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated septiembre 11, 2025.
Peruse reviews from past customers who have flown with United Airlines from Washington, D.C. Reagan-National Airport to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from Washington, D.C. Reagan-National?

    If you book a flight to Porto from Washington, D.C. Reagan-National, you will be flying to Porto, which is the city’s only airport. Porto (OPO) is located 6.8 mi from the center of Porto. There are 0 flights from Washington, D.C. Reagan-National to Porto per day from 1 airline.

  • How long is the flight from Washington, D.C. Reagan-National Airport to Porto?

    There are many flights that can get you from Washington, D.C. Reagan-National Airport to Porto in 12h 56m. Fly via Delta or American Airlines to get the fastest option. Airlines will cover a distance of 3520 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Washington, D.C. Reagan-National Airport to Porto round-trip?

    Our cheapest airline available from Washington, D.C. Reagan-National Airport to Porto is United Airlines. Our recent data shows that you can find tickets from as low as $520 on this airline. Users have found that United Airlines is 37% cheaper than the other options available to this destination.

  • Can I find deals for flights from Reagan-National to Porto that include hotel bookings?

    Yes. In addition to deals on Reagan-National to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Porto.

  • Can I find deals for business class flights from Reagan-National to Porto?

    Yes. Cheapflights offers flight deals from Reagan-National to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Porto?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Porto (average of $523). Flying from Washington, D.C. Reagan-National Airport to Porto in June is currently the most expensive (average of $1,027). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Arcos de Valdevez
Coimbra

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Top airline flying from Reagan-National to Porto

Discover the top airline that operate flights from Reagan-National to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$520Average$1,087FlexibilityNo cancel feeOn-time69%

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