HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Reagan-National

$536+ Cheap flights from Porto (OPO) to Reagan-National (DCA)

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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — DCA
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Porto to Reagan-National with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Porto to Reagan-National

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) to Reagan-National (DCA). 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 April 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$543
(United Airlines)

One-way from

$536
(Iberia)

Popular in

January

Cheapest in

May

Average price

$632
Provider with most accurate pricing for Porto-Washington, D.C. Reagan-National flight deals.
Search Deals
Provider most trusted by Cheapflights users for Porto-Washington, D.C. Reagan-National flights.
Search Deals
From Porto to Washington, D.C. Reagan-National
Search Deals
One-way flight from Porto to Washington, D.C. Reagan-National
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($57 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Porto to Reagan-National

Cheapest flights from Porto to Reagan-National
Explore the most affordable flight options available from Porto to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2025.

This United Airlines deal was found by Cheapflights users on 4/29. 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.
Sun 6/811:20 amOPO - DCA
1 stop27h 59mUnited Airlines
Sun 6/229:33 amDCA - OPO
1 stop16h 22mUnited Airlines
Deal found 4/29$543
This Air Canada deal was found by Cheapflights users on 4/29. 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.
Wed 10/86:00 amOPO - DCA
2 stops20h 51mAir Canada
Tue 10/2111:00 amDCA - OPO
2 stops19h 30mAir Canada
Deal found 4/29$560
This British Airways deal was found by Cheapflights users on 4/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/88:15 amOPO - DCA
2 stops28h 35mBritish Airways
Sun 6/226:59 pmDCA - OPO
2 stops20h 21mBritish Airways
Deal found 4/29$564
This Lufthansa deal was found by Cheapflights users on 4/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/206:00 amOPO - DCA
2 stops18h 03mMultiple Airlines
Wed 10/19:40 amDCA - OPO
2 stops20h 45mMultiple Airlines
Deal found 4/29$669
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Sun 6/88:15 amOPO - DCA
2 stops19h 52mAmerican Airlines
Sat 6/212:54 pmDCA - OPO
2 stops15h 46mAmerican Airlines
Deal found 4/29$700
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/612:20 pmOPO - DCA
2 stops15h 16mIberia
Fri 5/912:35 pmDCA - OPO
2 stops14h 00mIberia
Deal found 4/29$831
This oojo deal was found by Cheapflights users on 4/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:10 pmOPO - DCA
1 stop31h 41mTAP AIR PORTUGAL
Tue 10/211:45 pmDCA - OPO
2 stops19h 20mTAP AIR PORTUGAL
Deal found 4/29$1,103

Cheapflights Fare Finder

Customize your flight search to find flights from Porto to Reagan-National 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 April 30, 2025.
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

Porto

Fly to

Reagan-National

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 6/8

11:20 am-10:19 am

1 stop27h 59m

Washington, D.C. Reagan-National

Sun 6/22

9:33 am-6:55 am

1 stop16h 22m

$543

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 10/8

6:00 am-9:51 pm

2 stops20h 51m

Washington, D.C. Reagan-National

Tue 10/21

11:00 am-11:30 am

2 stops19h 30m

$560

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 6/8

8:15 am-7:50 am

2 stops28h 35m

Washington, D.C. Reagan-National

Sun 6/22

6:59 pm-8:20 pm

2 stops20h 21m

$564

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 8/20

6:00 am-7:03 pm

2 stops18h 03m

Washington, D.C. Reagan-National

Wed 10/1

9:40 am-11:25 am

2 stops20h 45m

$669

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 6/8

8:15 am-11:07 pm

2 stops19h 52m

Washington, D.C. Reagan-National

Sat 6/21

2:54 pm-11:40 am

2 stops15h 46m

$700

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 10/8

6:10 pm-8:51 pm

1 stop31h 41m

Washington, D.C. Reagan-National

Tue 10/21

1:45 pm-2:05 pm

2 stops19h 20m

$1,103

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sat 9/20

10:40 am-11:00 pm

2 stops17h 20m

$536

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Tue 9/16

8:40 pm-11:00 pm

2 stops31h 20m

$540

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 5/29

12:20 pm-3:55 pm

2 stops32h 35m

$556

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 8/25

6:30 am-5:26 pm

2 stops15h 56m

$611

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 15 results
1
2
  • Most accurate provider: When it comes to deals on Porto-Washington, D.C. Reagan-National Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Porto-Washington, D.C. Reagan-National Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Porto-Washington, D.C. Reagan-National Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Porto-Washington, D.C. Reagan-National Airport flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Porto-Washington, D.C. Reagan-National Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Porto 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 Porto to Washington, D.C. Reagan-National Airport

Rainfall in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Reagan-National Airport when rainfall is around 2.6 in.

Temperature in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Reagan-National Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Reagan-National

Get insights into the airlines that provide service to Reagan-National. 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 Reagan-National. Reviews last updated April 30, 2025.
See what other customers who have flown with Delta, KLM and United Airlines from Porto to Washington, D.C. have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
TAP AIR PORTUGAL
7.1
Good
1,851 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Porto to Reagan-National. 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 from for flights from Porto to Washington, D.C. Reagan-National?

    Porto (OPO), located 6.8 mi from the city center, is the airport you fly out of when you book flights from Porto to Washington, D.C. Reagan-National. 0 airlines have flights from Porto to Washington, D.C. Reagan-National on a regular basis. Booking flights from Porto to Washington, D.C. Reagan-National should not be difficult; the airport handles an average of 0 outbound flights to Washington, D.C. Reagan-National per day.

  • What are the cheapest airlines to fly from Porto to Washington, D.C. Reagan-National Airport one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at $540. American Airlines flights start at $556 while deals on KLM start at $611 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Porto to Reagan-National 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 Porto to Washington, D.C. Reagan-National Airport?

    Currently, February is the cheapest month in which you can book a flight from Porto to Washington, D.C. Reagan-National Airport (average of $278). Flying from Porto to Washington, D.C. Reagan-National Airport in June is currently the most expensive (average of $344). 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
Alexandria
Arlington
Woodbridge
Tysons
Fairfax
Springfield
Rockville
Fredericksburg
Silver Spring
Gaithersburg
Linthicum Heights
Falls Church
Laurel
Easton
Towson
Herndon
Bowie
National Harbor
Oxon Hill
Reston

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Porto to Reagan-National

See prices for flight routes from nearby airports that may be better suited for you.
Lisbon to Dulles Intl flights
Lisbon to Reagan-National flights
Lisbon to Baltimore flights
Porto to Dulles Intl flights
Porto to Baltimore flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.