HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
District of Columbia

$362+ Cheap flights from Porto (OPO) to District of Columbia

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 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — IAD
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Porto to District of Columbia 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 District of Columbia

Keep the following information in mind while searching for Porto to District of Columbia flight deals. Data was last updated March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$517
(Iberia)

One-way from

$362
(oojo)

Popular in

January

Cheapest in

November

Average price

$638
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 District of Columbia
Search Deals
One-way flight from Porto to District of Columbia
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from Porto to District of Columbia

Cheapest flights from Porto to District of Columbia
Explore the most affordable flight options available from Porto to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

This Iberia deal was found by Cheapflights users on 3/26. 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.
Fri 5/168:15 amOPO - IAD
1 stop11h 45mIberia
Thu 5/294:35 pmIAD - OPO
1 stop18h 20mIberia
Deal found 3/26$517
This KLM deal was found by Cheapflights users on 3/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/126:55 pmOPO - IAD
1 stop25h 40mKLM
Sat 4/196:30 pmIAD - OPO
1 stop16h 00mKLM
Deal found 3/27$522
This Delta deal was found by Cheapflights users on 3/27. 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.
Sun 4/135:00 amOPO - IAD
1 stop15h 35mDelta
Fri 4/188:33 pmIAD - OPO
2 stops16h 37mDelta
Deal found 3/27$531
This British Airways deal was found by Cheapflights users on 3/27. 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.
Thu 5/18:15 amOPO - IAD
1 stop11h 45mBritish Airways
Sat 5/1710:45 pmIAD - OPO
1 stop16h 50mBritish Airways
Deal found 3/27$533
This SWISS deal was found by Cheapflights users on 3/27. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/168:40 amOPO - IAD
1 stop12h 35mSWISS
Wed 4/308:45 pmIAD - OPO
1 stop16h 45mSWISS
Deal found 3/27$560
This Gotogate deal was found by Cheapflights users on 3/27. 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 5/16:00 amOPO - IAD
1 stop14h 50mLufthansa
Sat 5/1710:20 pmIAD - OPO
2 stops19h 25mLufthansa
Deal found 3/27$580
This Delta deal was found by Cheapflights users on 3/27. 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 5/19:25 amOPO - DCA
2 stops18h 20mDelta
Sat 5/176:32 pmDCA - OPO
2 stops18h 08mDelta
Deal found 3/27$597
This United Airlines deal was found by Cheapflights users on 3/27. 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.
Sat 10/186:00 amOPO - IAD
1 stop14h 50mUnited Airlines
Sat 10/1810:05 pmIAD - OPO
2 stops32h 10mUnited Airlines
Deal found 3/27$608
This Mytrip deal was found by Cheapflights users on 3/27. 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 5/14:00 pmOPO - IAD
3 stops32h 59mMultiple Airlines
Sat 5/1710:05 pmIAD - OPO
3 stops29h 55mMultiple Airlines
Deal found 3/27$669
This American Airlines deal was found by Cheapflights users on 3/26. 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 5/118:15 amOPO - DCA
2 stops15h 52mAmerican Airlines
Sun 5/1810:55 amDCA - OPO
2 stops15h 40mAmerican Airlines
Deal found 3/26$688
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/187:00 amOPO - IAD
1 stop13h 20mTAP AIR PORTUGAL
Sat 10/1810:35 pmIAD - OPO
1 stop15h 25mTAP AIR PORTUGAL
Deal found 3/27$780
This United Airlines deal was found by Cheapflights users on 3/27. 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.
Sat 4/1212:35 pmOPO - DCA
1 stop12h 07mUnited Airlines
Sat 4/191:19 pmDCA - OPO
2 stops21h 26mUnited Airlines
Deal found 3/27$934

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated March 28, 2025.
Use the filters below to find and compare flights from Porto to District of Columbia that are best for you.

Fly from

Porto

Fly to

District of Columbia

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 5/16

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Thu 5/29

4:35 pm-3:55 pm

1 stop18h 20m

$517

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 4/12

6:55 pm-3:35 pm

1 stop25h 40m

Washington, D.C. Dulles Intl

Sat 4/19

6:30 pm-3:30 pm

1 stop16h 00m

$522

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 4/13

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Fri 4/18

8:33 pm-6:10 pm

2 stops16h 37m

$531

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 5/1

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Sat 5/17

10:45 pm-8:35 pm

1 stop16h 50m

$533

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 4/16

8:40 am-4:15 pm

1 stop12h 35m

Washington, D.C. Dulles Intl

Wed 4/30

8:45 pm-6:30 pm

1 stop16h 45m

$560

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 5/1

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Sat 5/17

10:20 pm-10:45 pm

2 stops19h 25m

$580

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 5/1

9:25 am-10:45 pm

2 stops18h 20m

Washington, D.C. Reagan-National

Sat 5/17

6:32 pm-5:40 pm

2 stops18h 08m

$597

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 5/1

4:00 pm-7:59 pm

3 stops32h 59m

Washington, D.C. Dulles Intl

Sat 5/17

10:05 pm-9:00 am

3 stops29h 55m

$669

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 5/11

8:15 am-7:07 pm

2 stops15h 52m

Washington, D.C. Reagan-National

Sun 5/18

10:55 am-7:35 am

2 stops15h 40m

$688

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sat 4/12

12:35 pm-7:42 pm

1 stop12h 07m

Washington, D.C. Reagan-National

Sat 4/19

1:19 pm-3:45 pm

2 stops21h 26m

$934

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 28 results
1
2
3

Best time to book a flight from Porto to District of Columbia

Have a flexible travel schedule? Discover the best time to fly to District of Columbia 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 District of Columbia

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

Find hourly flight availability from Porto to District of Columbia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

When flying from Porto to District of Columbia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in District of Columbia 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 District of Columbia when rainfall is around 2.6 in.

Temperature in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to District of Columbia, 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 District of Columbia

Get insights into the airlines that provide service to District of Columbia. 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 District of Columbia. Reviews last updated March 28, 2025.
Read reviews from past customers who have flown Delta, KLM and SWISS from Porto to District of Columbia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

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
7,896 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

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
1,321 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

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
SWISS
7.5
Good
1,570 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

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
8,603 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

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
Turkish Airlines
7.3
Good
3,744 reviews
Delta
8.0
Very good
7,896 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

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 District of Columbia. 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 District of Columbia?

    For a flight from Porto to District of Columbia, you will be flying from Porto. Porto (OPO) is just 6.8 mi from the center of the city.

  • What are the cheapest airlines to fly from Porto to District of Columbia one-way?

    To fly one-way, consider booking your trip with Royal Air Maroc, which is currently one of the cheapest options available, starting at $362. TAP AIR PORTUGAL flights start at $400 while deals on British Airways start at $512 one-way.

  • Can I find deals for flights from Porto to District of Columbia that include hotel bookings?

    Yes. In addition to deals on Porto to District of Columbia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Porto to District of Columbia?

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

  • Can I find deals for business class flights from Porto to District of Columbia?

    Yes. Cheapflights offers flight deals from Porto to District of Columbia 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 District of Columbia?

    Currently, August is the cheapest month in which you can book a flight from Porto to District of Columbia (average of $309). Flying from Porto to District of Columbia in June is currently the most expensive (average of $385). 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

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 District of Columbia

See prices for flight routes from nearby airports that may be better suited for you.
Lisbon to Newark flights
Lisbon to John F Kennedy Intl flights
Porto to Newark flights
Lisbon to LaGuardia flights
Lisbon to Miami flights
Faro to Newark flights
Porto to John F Kennedy Intl flights
Porto to LaGuardia flights
Lisbon to West Palm Beach flights
Lisbon to Los Angeles flights
Lisbon to San Francisco flights
Lisbon to Philadelphia flights
Faro to John F Kennedy Intl flights
Lisbon to Boston flights
Porto to Fort Lauderdale flights
Porto to West Palm Beach flights
Lisbon to Fort Lauderdale flights
Lisbon to Dulles Intl flights
Lisbon to Stewart flights
Porto to Miami flights
Lisbon to Seattle flights
Porto to Boston flights
Lisbon to O'Hare Intl flights
Lisbon to Dallas/Fort Worth flights
Faro to LaGuardia flights
Lisbon to Orlando flights
Porto to Dulles Intl flights
Porto to Reagan-National flights
Lisbon to Reagan-National flights
Ponta Delgada to Boston flights
Porto to Baltimore flights
Lisbon to Las Vegas flights
Lisbon to Baltimore flights
Porto to Los Angeles flights
Porto to San Francisco flights
Porto to O'Hare Intl flights
Ponta Delgada to John F Kennedy Intl flights
Lisbon to San Diego flights
Lisbon to Sky Harbor Intl flights
Ponta Delgada to LaGuardia flights
Lisbon to Hobby flights
Porto to Orlando flights
Ponta Delgada to Newark flights
Lisbon to Portland flights
Lisbon to Honolulu flights
Lisbon to Santa Ana flights

Top airline flying from Porto to District of Columbia

Discover the top airline that operate flights from Porto to District of Columbia. 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$480Average$812FlexibilityNo cancel feeOn-timeN/A
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.