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

$350+ 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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — DCA
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
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.

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 November 4, 2025.

This Delta deal was found by Cheapflights users on 11/4. 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.
Thu 11/206:35 amOPO - DCA
2 stops21h 21mDelta
Sat 12/611:13 amDCA - OPO
2 stops18h 17mDelta
Deal found 11/4$538
This Gotogate deal was found by Cheapflights users on 11/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:00 amOPO - DCA
2 stops18h 45mAir Canada
Thu 12/46:00 amDCA - OPO
2 stops24h 10mAir Canada
Deal found 11/2$558
This Iberia deal was found by Cheapflights users on 11/4. 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.
Thu 11/208:20 amOPO - DCA
2 stops15h 36mIberia
Sat 12/66:30 pmDCA - OPO
2 stops12h 15mIberia
Deal found 11/4$601
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/216:00 amOPO - DCA
2 stops31h 59mUnited Airlines
Wed 1/76:30 amDCA - OPO
2 stops24h 10mUnited Airlines
Deal found 11/4$630
This Delta deal was found by Cheapflights users on 11/2. 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.
Thu 12/2511:15 amOPO - DCA
2 stops36h 04mDelta
Mon 1/52:35 pmDCA - OPO
2 stops14h 55mDelta
Deal found 11/2$654
This Delta deal was found by Cheapflights users on 11/2. 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.
Sat 12/276:00 amOPO - DCA
2 stops32h 11mDelta
Mon 1/511:00 amDCA - OPO
2 stops18h 30mDelta
Deal found 11/2$720
This Delta deal was found by Cheapflights users on 11/2. 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.
Thu 12/2511:15 amOPO - DCA
2 stops36h 04mDelta
Thu 1/12:25 pmDCA - OPO
2 stops20h 00mDelta
Deal found 11/2$729
This Delta deal was found by Cheapflights users on 11/2. 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.
Thu 12/2511:15 amOPO - DCA
2 stops36h 04mDelta
Sun 1/410:10 amDCA - OPO
2 stops19h 20mDelta
Deal found 11/2$733
This American Airlines deal was found by Cheapflights users on 11/2. 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.
Thu 12/258:20 amOPO - DCA
2 stops29h 27mAmerican Airlines
Fri 1/211:32 amDCA - OPO
2 stops19h 13mAmerican Airlines
Deal found 11/2$757
This Delta deal was found by Cheapflights users on 11/2. 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.
Fri 12/266:30 amOPO - DCA
2 stops19h 00mDelta
Mon 1/511:10 amDCA - OPO
2 stops18h 20mDelta
Deal found 11/2$766
This Mytrip deal was found by Cheapflights users on 11/2. 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.
Thu 11/208:10 pmOPO - DCA
3 stops24h 21mMultiple Airlines
Thu 12/46:00 amDCA - OPO
2 stops23h 15mMultiple Airlines
Deal found 11/2$778
This Delta deal was found by Cheapflights users on 11/2. 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.
Fri 12/267:35 amOPO - DCA
2 stops17h 57mDelta
Thu 1/17:20 amDCA - OPO
2 stops22h 30mDelta
Deal found 11/2$792

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 November 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$538
(Delta)

One-way from

$350
(British Airways)

Popular in

September

Cheapest in

May

Average price

$595
Provider with most accurate pricing for Porto-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Porto-Washington, D.C. (WAS) 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. 6% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 4, 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

Thu 11/20

6:35 am-10:56 pm

2 stops21h 21m

Washington, D.C. Reagan-National

Sat 12/6

11:13 am-10:30 am

2 stops18h 17m

$538

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 11/20

8:20 am-6:56 pm

2 stops15h 36m

Washington, D.C. Reagan-National

Sat 12/6

6:30 pm-11:45 am

2 stops12h 15m

$601

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 4/1

5:00 am-6:06 pm

2 stops18h 06m

Washington, D.C. Reagan-National

Sun 4/5

5:00 pm-3:35 pm

2 stops17h 35m

$613

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 12/21

6:00 am-8:59 am

2 stops31h 59m

Washington, D.C. Reagan-National

Wed 1/7

6:30 am-11:40 am

2 stops24h 10m

$630

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 12/25

11:15 am-6:19 pm

2 stops36h 04m

Washington, D.C. Reagan-National

Mon 1/5

2:35 pm-10:30 am

2 stops14h 55m

$654

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sat 12/27

6:00 am-9:11 am

2 stops32h 11m

Washington, D.C. Reagan-National

Mon 1/5

11:00 am-10:30 am

2 stops18h 30m

$720

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 12/25

11:15 am-6:19 pm

2 stops36h 04m

Washington, D.C. Reagan-National

Thu 1/1

2:25 pm-3:25 pm

2 stops20h 00m

$729

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 12/25

11:15 am-6:19 pm

2 stops36h 04m

Washington, D.C. Reagan-National

Sun 1/4

10:10 am-10:30 am

2 stops19h 20m

$733

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 12/25

8:20 am-8:47 am

2 stops29h 27m

Washington, D.C. Reagan-National

Fri 1/2

11:32 am-11:45 am

2 stops19h 13m

$757

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Fri 12/26

6:30 am-8:30 pm

2 stops19h 00m

Washington, D.C. Reagan-National

Mon 1/5

11:10 am-10:30 am

2 stops18h 20m

$766

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 21 results
1
2
3

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.

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.

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

    Departing from Porto to Washington, D.C. Reagan-National Airport will take you 15h 36m. The distance from Porto to Washington, D.C. Reagan-National Airport is about 3520 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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.

See more FAQs

Traveling to a place near Washington, D.C. Reagan-National Airport?

Book flights to Washington, D.C. Reagan-National Airport if you plan to visit one of these locations
Alexandria
Tysons
Woodbridge
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Waldorf
Bowie
Largo
McLean

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.