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Washington, D.C.

$312+ Cheap flights from Porto (OPO) to Washington, D.C. (WAS)

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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — WAS
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap flight deals from Porto to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) to Washington, D.C. (WAS). 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 junio 12, 2025.

Round-trip from

$486
(Delta)

One-way from

$312
(Kiwi.com)

Popular in

June

Cheapest in

May

Average price

$1,028
From Porto to Washington, D.C. (WAS)
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One-way flight from Porto to Washington, D.C. (WAS)
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Highest demand for flights based on searches. 11% potential increase in price ($89 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Porto to Washington, D.C.

Cheapest flights from Porto to Washington, D.C.
Explore the most affordable flight options available from Porto to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/2412:55 pmOPO - IAD
1 stop30h 40mBrussels Airlines
sáb. 1/35:45 pmIAD - OPO
1 stop13h 20mBrussels Airlines
Deal found 6/10$417
This Delta deal was found by Cheapflights users on 6/12. 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.
lun. 6/236:30 amOPO - IAD
1 stop14h 05mDelta
mié. 7/99:20 pmIAD - OPO
1 stop13h 10mDelta
Deal found 6/12$486
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/88:15 amOPO - IAD
1 stop11h 45mAmerican Airlines
mar. 10/214:35 pmIAD - OPO
1 stop14h 05mAmerican Airlines
Deal found 6/11$491
This oojo deal was found by Cheapflights users on 6/12. 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.
mié. 10/810:25 pmOPO - IAD
1 stop21h 55mTAP AIR PORTUGAL
mar. 10/215:00 pmIAD - OPO
1 stop16h 05mTAP AIR PORTUGAL
Deal found 6/12$492
This KLM deal was found by Cheapflights users on 6/12. 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.
dom. 6/224:20 pmOPO - IAD
1 stop28h 15mKLM
lun. 7/75:25 pmIAD - OPO
1 stop17h 10mKLM
Deal found 6/12$493
This Delta deal was found by Cheapflights users on 6/12. 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.
lun. 6/2311:25 amOPO - DCA
2 stops17h 08mDelta
mié. 7/91:25 pmDCA - OPO
2 stops16h 15mDelta
Deal found 6/12$498
This Iberia deal was found by Cheapflights users on 6/12. 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.
mié. 10/812:20 pmOPO - DCA
2 stops15h 35mIberia
mar. 10/215:44 pmDCA - OPO
2 stops12h 56mIberia
Deal found 6/12$514
This American Airlines deal was found by Cheapflights users on 6/12. 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.
dom. 7/2712:20 pmOPO - DCA
2 stops15h 51mAmerican Airlines
dom. 8/32:54 pmDCA - OPO
2 stops15h 46mAmerican Airlines
Deal found 6/12$532
This Air Canada deal was found by Cheapflights users on 6/10. 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.
mié. 10/86:00 amOPO - DCA
2 stops20h 51mAir Canada
mar. 10/2111:00 amDCA - OPO
2 stops19h 30mAir Canada
Deal found 6/10$563
This Lufthansa deal was found by Cheapflights users on 6/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/246:00 amOPO - IAD
1 stop14h 50mLufthansa
sáb. 1/311:10 pmIAD - OPO
1 stop19h 35mLufthansa
Deal found 6/10$581
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/86:00 amOPO - IAD
2 stops20h 05mAir Canada
mar. 10/219:45 amIAD - OPO
2 stops25h 00mAir Canada
Deal found 6/10$583
This British Airways deal was found by Cheapflights users on 6/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/2912:20 pmOPO - DCA
2 stops15h 51mBritish Airways
mar. 8/197:32 pmDCA - OPO
2 stops31h 03mBritish Airways
Deal found 6/10$607

Cheapflights Fare Finder

Customize your flight search to find flights from Porto to Washington, D.C. 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 junio 12, 2025.
Use the filters below to find and compare flights from Porto to Washington, D.C. that are best for you.

Fly from

Porto

Fly to

Washington, D.C.

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

lun. 6/23

6:30 am-3:35 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

mié. 7/9

9:20 pm-3:30 pm

1 stop13h 10m

$486

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

mié. 10/8

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

mar. 10/21

4:35 pm-11:40 am

1 stop14h 05m

$491

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

mié. 10/8

10:25 pm-3:20 pm

1 stop21h 55m

Washington, D.C. Dulles Intl

mar. 10/21

5:00 pm-2:05 pm

1 stop16h 05m

$492

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

dom. 6/22

4:20 pm-3:35 pm

1 stop28h 15m

Washington, D.C. Dulles Intl

lun. 7/7

5:25 pm-3:35 pm

1 stop17h 10m

$493

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

lun. 6/23

11:25 am-11:33 pm

2 stops17h 08m

Washington, D.C. Reagan-National

mié. 7/9

1:25 pm-10:40 am

2 stops16h 15m

$498

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

mié. 10/8

12:20 pm-10:55 pm

2 stops15h 35m

Washington, D.C. Reagan-National

mar. 10/21

5:44 pm-11:40 am

2 stops12h 56m

$514

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

mié. 10/8

6:00 am-9:51 pm

2 stops20h 51m

Washington, D.C. Reagan-National

mar. 10/21

11:00 am-11:30 am

2 stops19h 30m

$563

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

mié. 10/8

6:00 am-9:05 pm

2 stops20h 05m

Washington, D.C. Dulles Intl

mar. 10/21

9:45 am-3:45 pm

2 stops25h 00m

$583

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

mié. 10/8

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

mar. 10/21

10:20 pm-10:50 pm

2 stops19h 30m

$590

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

mar. 7/29

12:20 pm-11:11 pm

2 stops15h 51m

Washington, D.C. Reagan-National

mar. 8/19

7:32 pm-7:35 am

2 stops31h 03m

$607

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 56 results
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Best time to book a flight from Porto to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. 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.

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

Find hourly flight availability from Porto to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Porto to Washington, D.C. in the morning. If you’re flexible enough to do this you can expect to save up to 32% on your trip compared to booking a flight at noon.

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. 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. when rainfall is around 2.6 in.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C., 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 Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated junio 12, 2025.
Read reviews from past customers who have flown Delta, KLM and Austrian Airlines from Porto to Washington, D.C.. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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

    Porto (OPO) is the airport you will fly out of if you book a flight from Porto to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Porto; the airport handles an average of 0 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Porto airport to Washington, D.C.. It is only a 6.8 mi journey to Porto (OPO) from Porto’s city center.

  • What are the cheapest airlines flying from Porto to Washington, D.C. round-trip?

    According to our current data, Delta ($486), American Airlines ($491), and TAP AIR PORTUGAL ($492) offers the cheapest pricing from Porto to Washington, D.C.. You may be able to fly from Porto to Washington, D.C. for 32% less than the average price by searching for these airlines.

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

    One-way options have recently been found by users for as low as $386 on Royal Air Maroc. Other airlines that offer cheap prices include Iberia from $491 and PLAY from $503 one-way.

  • What are the most popular routes from Porto to Washington, D.C.?

    When deciding which route to take from Porto to Washington, D.C. consider Porto - Washington, D.C. Reagan-National, Porto - Baltimore/Washington or Porto - Washington, D.C. Dulles Intl as they are the most popular.

  • Can I find deals for flights from Porto to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Porto to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Porto to Washington, D.C.?

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

  • Can I find deals for business class flights from Porto to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Porto to Washington, D.C. 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.?

    Currently, August is the cheapest month in which you can book a flight from Porto to Washington, D.C. (average of $241). Flying from Porto to Washington, D.C. in March is currently the most expensive (average of $290). 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
Arlington
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Alternative routes for Porto to Washington, D.C.

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

Top airline flying from Porto to Washington, D.C.

Discover the top airline that operate flights from Porto to Washington, D.C.. 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$480Average$751FlexibilityNo cancel feeOn-timeN/A

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