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

According to our current data, PLAY ($487), United Airlines ($543), and KLM ($545) offers the cheapest pricing from Porto to Washington, D.C.. You may be able to fly from Porto to Washington, D.C. for 33% 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 $356 on PLAY. Other airlines that offer cheap prices include Royal Air Maroc from $383 and TAP AIR PORTUGAL from $416 one-way.

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 $309). Flying from Porto to Washington, D.C. in June is currently the most expensive (average of $383). 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.

What is the cheapest day to fly from Porto to Washington, D.C.?

Travelers seeking maximum savings on their Porto to Washington, D.C. flight should consider departing on Tuesday mornings when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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. Dulles Intl, Porto - Baltimore/Washington or Porto - Washington, D.C. Reagan-National as they are the most popular.

What is the cheapest day to fly round-trip from Porto to Washington, D.C.?

Flights from Porto to Washington, D.C. are found to be more expensive on Friday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C..

What is the cheapest month to fly from Porto to Washington, D.C.?

November is one of the best times of the year to fly to Washington, D.C. from Porto. Prices for November average $732 per person but you can even find prices for as low as $524. The most expensive prices can be found in the month of January. Opting for a November flight can save you 29% on your journey compared to booking in January

Most accurate provider : When it comes to deals on Porto-Washington, D.C. 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. flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Porto-Washington, D.C. flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Porto-Washington, D.C. 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. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

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.

$340+ Flights from Porto to Washington, D.C.

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Find cheap flights from Porto to Washington, D.C. 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

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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 Washington, D.C.

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$487 (Mytrip)
One-way from	$340 (Mytrip)
Popular in	January
Cheapest in	November
Average price	$629

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. (WAS)

Search Deals

One-way flight from Porto to Washington, D.C. (WAS)

Search Deals

Highest demand for flights based on searches. 6% potential increase in price ($51 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 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 April 17, 2025.

Sun 5/189:05 pmOPO - BWI

1 stop25h 35mPLAY

Mon 6/26:50 pmBWI - OPO

1 stop20h 15mPLAY

Deal found 4/17

$487

Sun 5/186:35 pmOPO - IAD

1 stop25h 00mMultiple Airlines

Mon 6/28:45 pmIAD - OPO

1 stop30h 10mMultiple Airlines

Deal found 4/17

$542

Sun 6/811:20 amOPO - DCA

1 stop15h 33mUnited Airlines

Sat 6/217:00 amDCA - OPO

1 stop18h 55mUnited Airlines

Deal found 4/17

$543

Wed 5/74:20 pmOPO - IAD

1 stop28h 15mKLM

Tue 5/136:30 pmIAD - OPO

1 stop16h 00mKLM

Deal found 4/17

$545

Wed 5/76:20 amOPO - IAD

2 stops18h 19mDelta

Tue 5/139:25 pmIAD - OPO

1 stop13h 05mDelta

Deal found 4/17

$553

Wed 10/86:00 amOPO - DCA

2 stops18h 44mAir Canada

Tue 10/2111:00 amDCA - OPO

2 stops19h 30mAir Canada

Deal found 4/17

$567

Sun 6/89:25 pmOPO - BWI

1 stop27h 10mBritish Airways

Sat 6/219:20 pmBWI - OPO

1 stop32h 30mBritish Airways

Deal found 4/17

$594

Wed 10/86:15 amOPO - IAD

2 stops14h 35mLufthansa

Tue 10/2110:20 pmIAD - OPO

2 stops19h 30mLufthansa

Deal found 4/17

$642

Sun 6/82:35 pmOPO - IAD

2 stops30h 40mSWISS

Sat 6/218:45 pmIAD - OPO

1 stop16h 45mSWISS

Deal found 4/17

$717

Wed 5/710:50 amOPO - IAD

1 stop29h 55mTurkish Airlines

Wed 5/211:30 pmIAD - OPO

1 stop21h 20mTurkish Airlines

Deal found 4/17

$780

Sat 5/3112:35 pmOPO - BWI

2 stops38h 07mUnited Airlines

Sat 6/711:19 amBWI - OPO

2 stops14h 36mUnited Airlines

Deal found 4/16

$784

Sun 5/188:15 amOPO - DCA

2 stops15h 52mAmerican Airlines

Mon 6/212:35 pmDCA - OPO

2 stops14h 00mAmerican Airlines

Deal found 4/17

$794

Best flights from Porto to Washington, D.C.
Discover carefully curated flight deals from Porto to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 17, 2025.

Sun 5/189:05 pmOPO - BWI

1 stop25h 35mPLAY

Mon 6/26:50 pmBWI - OPO

1 stop20h 15mPLAY

Deal found 4/17

$487

Sun 5/186:35 pmOPO - IAD

1 stop25h 00mMultiple Airlines

Mon 6/28:45 pmIAD - OPO

1 stop30h 10mMultiple Airlines

Deal found 4/17

$542

Sun 6/811:20 amOPO - DCA

1 stop15h 33mUnited Airlines

Sat 6/217:00 amDCA - OPO

1 stop18h 55mUnited Airlines

Deal found 4/17

$543

Wed 5/74:20 pmOPO - IAD

1 stop28h 15mKLM

Tue 5/136:30 pmIAD - OPO

1 stop16h 00mKLM

Deal found 4/17

$545

Wed 5/76:20 amOPO - IAD

2 stops18h 19mDelta

Tue 5/139:25 pmIAD - OPO

1 stop13h 05mDelta

Deal found 4/17

$553

Wed 10/86:00 amOPO - DCA

2 stops18h 44mAir Canada

Tue 10/2111:00 amDCA - OPO

2 stops19h 30mAir Canada

Deal found 4/17

$567

Sun 6/89:25 pmOPO - BWI

1 stop27h 10mBritish Airways

Sat 6/219:20 pmBWI - OPO

1 stop32h 30mBritish Airways

Deal found 4/17

$594

Wed 10/86:15 amOPO - IAD

2 stops14h 35mLufthansa

Tue 10/2110:20 pmIAD - OPO

2 stops19h 30mLufthansa

Deal found 4/17

$642

Sun 6/82:35 pmOPO - IAD

2 stops30h 40mSWISS

Sat 6/218:45 pmIAD - OPO

1 stop16h 45mSWISS

Deal found 4/17

$717

Wed 5/710:50 amOPO - IAD

1 stop29h 55mTurkish Airlines

Wed 5/211:30 pmIAD - OPO

1 stop21h 20mTurkish Airlines

Deal found 4/17

$780

Sun 5/188:15 amOPO - DCA

2 stops15h 52mAmerican Airlines

Mon 6/212:35 pmDCA - OPO

2 stops14h 00mAmerican Airlines

Deal found 4/17

$794

Sun 5/188:35 pmOPO - DCA

2 stops31h 01mIberia

Mon 6/21:15 pmDCA - OPO

2 stops13h 20mIberia

Deal found 4/17

$799

Last-minute flights from Porto to Washington, D.C.
Discover last-minute flight deals from Porto to Washington, D.C.. Data last updated April 17, 2025 and is based on user searches.

Thu 5/112:10 pmOPO - BWI

2 stops26h 44mMultiple Airlines

Thu 5/810:50 amBWI - OPO

2 stops19h 35mMultiple Airlines

Deal found 4/16

$809

Wed 5/74:20 pmOPO - IAD

1 stop28h 15mKLM

Tue 5/136:30 pmIAD - OPO

1 stop16h 00mKLM

Deal found 4/17

$545

Wed 5/76:20 amOPO - IAD

2 stops18h 19mDelta

Tue 5/139:25 pmIAD - OPO

1 stop13h 05mDelta

Deal found 4/17

$553

Wed 5/710:50 amOPO - IAD

1 stop29h 55mTurkish Airlines

Wed 5/211:30 pmIAD - OPO

1 stop21h 20mTurkish Airlines

Deal found 4/17

$780

Wed 5/72:35 pmOPO - IAD

2 stops29h 40mSWISS

Wed 5/2110:15 pmIAD - OPO

2 stops15h 15mSWISS

Deal found 4/17

$1,003

Sun 5/189:05 pmOPO - BWI

1 stop25h 35mPLAY

Mon 6/26:50 pmBWI - OPO

1 stop20h 15mPLAY

Deal found 4/17

$487

Sun 5/186:35 pmOPO - IAD

1 stop25h 00mMultiple Airlines

Mon 6/28:45 pmIAD - OPO

1 stop30h 10mMultiple Airlines

Deal found 4/17

$542

Sun 5/186:15 amOPO - IAD

2 stops14h 35mLufthansa

Mon 6/210:20 pmIAD - OPO

2 stops19h 30mLufthansa

Deal found 4/17

$737

Sun 5/188:15 amOPO - DCA

2 stops15h 52mAmerican Airlines

Mon 6/212:35 pmDCA - OPO

2 stops14h 00mAmerican Airlines

Deal found 4/17

$794

Sun 5/188:35 pmOPO - DCA

2 stops31h 01mIberia

Mon 6/21:15 pmDCA - OPO

2 stops13h 20mIberia

Deal found 4/17

$799

Sun 5/1812:35 pmOPO - DCA

1 stop12h 06mUnited Airlines

Mon 6/23:00 pmDCA - OPO

1 stop10h 55mUnited Airlines

Deal found 4/17

$893

Sat 5/3112:35 pmOPO - BWI

2 stops38h 07mUnited Airlines

Sat 6/711:19 amBWI - OPO

2 stops14h 36mUnited Airlines

Deal found 4/16

$784

One-way flights from Porto to Washington, D.C.
Search for one-way flight options from Porto to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated April 17, 2025.

Fri 5/97:35 amOPO - BWI

2 stops20h 58mMultiple Airlines

Deal found 4/16

$340

Thu 5/89:10 pmOPO - BWI

1 stop25h 30mPLAY

Deal found 4/16

$356

Fri 5/3011:35 amOPO - IAD

2 stops32h 18mMultiple Airlines

Deal found 4/17

$368

Sun 6/17:00 pmOPO - IAD

1 stop29h 05mRoyal Air Maroc

Deal found 4/17

$383

Thu 5/159:00 amOPO - IAD

1 stop16h 50mTAP AIR PORTUGAL

Deal found 4/17

$416

Sun 6/298:25 amOPO - DCA

1 stop30h 53mMultiple Airlines

Deal found 4/17

$463

Sat 5/2410:40 amOPO - DCA

2 stops16h 56mBritish Airways

Deal found 4/17

$533

Sat 9/208:15 amOPO - IAD

1 stop11h 45mIberia

Deal found 4/17

$533

Sat 6/289:05 pmOPO - BWI

1 stop25h 35mWorldTicket

Deal found 4/17

$535

Tue 10/148:15 amOPO - BWI

2 stops18h 33mAmerican Airlines

Deal found 4/16

$546

Fri 10/1011:15 amOPO - BWI

1 stop13h 20mBritish Airways

Deal found 4/17

$562

Mon 8/259:20 amOPO - IAD

1 stop14h 55mKLM

Deal found 4/17

$591

Cheapflights Fare Finder

Use the filters below to find and compare flights from Porto to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Sun 5/18

9:05 pm-5:40 pm

1 stop25h 35m

Baltimore/Washington

Mon 6/2

6:50 pm-8:05 pm

1 stop20h 15m

$487

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 5/18

6:35 pm-2:35 pm

1 stop25h 00m

Washington, D.C. Dulles Intl

Mon 6/2

8:45 pm-7:55 am

1 stop30h 10m

$542

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 6/8

11:20 am-9:53 pm

1 stop15h 33m

Washington, D.C. Reagan-National

Sat 6/21

7:00 am-6:55 am

1 stop18h 55m

$543

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 5/7

4:20 pm-3:35 pm

1 stop28h 15m

Washington, D.C. Dulles Intl

Tue 5/13

6:30 pm-3:30 pm

1 stop16h 00m

$545

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 5/7

6:20 am-7:39 pm

2 stops18h 19m

Washington, D.C. Dulles Intl

Tue 5/13

9:25 pm-3:30 pm

1 stop13h 05m

$553

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 10/8

6:00 am-7:44 pm

2 stops18h 44m

Washington, D.C. Reagan-National

Tue 10/21

11:00 am-11:30 am

2 stops19h 30m

$567

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Sun 6/8

9:25 pm-7:35 pm

1 stop27h 10m

Baltimore/Washington

Sat 6/21

9:20 pm-10:50 am

1 stop32h 30m

$594

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/8

6:15 am-3:50 pm

2 stops14h 35m

Washington, D.C. Dulles Intl

Tue 10/21

10:20 pm-10:50 pm

2 stops19h 30m

$642

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 6/8

2:35 pm-4:15 pm

2 stops30h 40m

Washington, D.C. Dulles Intl

Sat 6/21

8:45 pm-6:30 pm

1 stop16h 45m

$717

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 5/7

10:50 am-11:45 am

1 stop29h 55m

Washington, D.C. Dulles Intl

Wed 5/21

1:30 pm-3:50 pm

1 stop21h 20m

$780

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 47 results

...

Compare providers for flights from Porto to Washington, D.C.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Porto to Washington, D.C. in April.

Provider	Price Accuracy	Trust Score*
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Porto-Washington, D.C. 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. flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Porto-Washington, D.C. flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Porto-Washington, D.C. 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. 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 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?

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

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

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.

Read reviews from past customers who have flown Delta, KLM and SWISS 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

7,917 reviews

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

7,917 reviews

Delta

8.0

Very good

7,917 reviews

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

1,329 reviews

Delta

8.0

Very good

7,917 reviews

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

1,580 reviews

Delta

8.0

Very good

7,917 reviews

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

8,667 reviews

Delta

8.0

Very good

7,917 reviews

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

3,769 reviews

Delta

8.0

Very good

7,917 reviews

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

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, PLAY ($487), United Airlines ($543), and KLM ($545) offers the cheapest pricing from Porto to Washington, D.C.. You may be able to fly from Porto to Washington, D.C. for 33% 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 $356 on PLAY. Other airlines that offer cheap prices include Royal Air Maroc from $383 and TAP AIR PORTUGAL from $416 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. Dulles Intl, Porto - Baltimore/Washington or Porto - Washington, D.C. Reagan-National 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 $309). Flying from Porto to Washington, D.C. in June is currently the most expensive (average of $383). 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

Arlington

Alexandria

Fairfax

Tysons

Springfield

Woodbridge

Rockville

Fredericksburg

Gaithersburg

Silver Spring

Linthicum Heights

Falls Church

Laurel

Easton

Herndon

Bowie

Gettysburg

National Harbor

Oxon Hill

Reston

Browse thousands of different options on Cheapflights for your next trip

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

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest$480	Average$812	FlexibilityNo cancel fee	On-timeN/A

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$340+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Porto to Washington, D.C. with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

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Cheap flight deals from Porto to Washington, D.C.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 April 17, 2025.

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 April 17, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Porto to Washington, D.C. that are best for you.

Compare providers for flights from Porto to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Porto to Washington, D.C. in April.

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.

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 April 17, 2025.

Rainfall in Washington, D.C. by month

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

Temperature in Washington, D.C. by month

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

Reviews of airlines servicing Washington, D.C.

Read reviews from past customers who have flown Delta, KLM and SWISS from Porto to Washington, D.C.. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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.?

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

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

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

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

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

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

What is the cheapest month to book a flight from Porto to Washington, D.C.?

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Alternative routes for Porto to Washington, D.C.

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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 April 17, 2025.