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$294+ Cheap flights from District of Columbia to Porto (OPO)

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 1/30. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — OPO
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from District of Columbia to Porto

Cheapest flights from District of Columbia to Porto
Explore the most affordable flight options available from District of Columbia to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Mytrip deal was found by Cheapflights users on 12/16. 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.
Tue 12/168:30 pmIAD - OPO
3 stops30h 30mMultiple Airlines
Sun 12/216:30 amOPO - IAD
2 stops17h 15mMultiple Airlines
Deal found 12/16$1,117
This Travelocity deal was found by Cheapflights users on 12/17. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:05 pmIAD - OPO
1 stop18h 55mMultiple Airlines
Sun 12/2812:00 pmOPO - IAD
1 stop14h 00mMultiple Airlines
Deal found 12/17$1,265
This KLM deal was found by Cheapflights users on 12/16. 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.
Wed 12/246:05 pmIAD - OPO
1 stop11h 25mKLM
Thu 1/16:35 amOPO - IAD
1 stop14h 30mKLM
Deal found 12/16$1,283
This oojo deal was found by Cheapflights users on 12/17. 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.
Thu 12/181:30 pmIAD - OPO
1 stop20h 40mTurkish Airlines
Wed 12/2410:55 amOPO - IAD
1 stop29h 50mTurkish Airlines
Deal found 12/17$1,296
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:15 pmIAD - OPO
2 stops20h 25mLufthansa
Wed 12/316:00 amOPO - IAD
1 stop13h 35mLufthansa
Deal found 12/16$1,329
This Gurufare deal was found by Cheapflights users on 12/16. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:25 pmIAD - OPO
1 stop20h 10mSWISS
Thu 1/112:05 pmOPO - IAD
2 stops30h 55mSWISS
Deal found 12/16$1,365
This KAYAK deal was found by Cheapflights users on 12/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:10 pmIAD - OPO
2 stops15h 45mLufthansa
Mon 12/296:00 amOPO - IAD
1 stop19h 15mLufthansa
Deal found 12/16$1,399
This oojo deal was found by Cheapflights users on 12/17. 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 12/248:10 pmDCA - OPO
1 stop10h 45mTAP AIR PORTUGAL
Sun 12/284:00 pmOPO - DCA
2 stops22h 28mTAP AIR PORTUGAL
Deal found 12/17$1,419
This Orbitz deal was found by Cheapflights users on 12/16. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:50 pmDCA - OPO
2 stops12h 50mIberia
Wed 12/318:40 pmOPO - DCA
2 stops27h 00mIberia
Deal found 12/16$1,687
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:59 amDCA - OPO
2 stops30h 36mMultiple Airlines
Wed 12/318:40 pmOPO - DCA
2 stops28h 40mMultiple Airlines
Deal found 12/16$1,781
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/178:19 amDCA - OPO
2 stops27h 26mBritish Airways
Wed 12/248:20 amOPO - DCA
2 stops37h 53mBritish Airways
Deal found 12/16$1,832
This CheapOair deal was found by Cheapflights users on 12/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1811:56 amDCA - OPO
2 stops24h 19mBritish Airways
Mon 12/298:40 pmOPO - DCA
2 stops32h 19mBritish Airways
Deal found 12/17$2,016

Find flight deals from District of Columbia to Porto

Keep the following information in mind while searching for District of Columbia to Porto flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$436
(Kiwi.com)

One-way from

$265
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$832
Provider with most accurate pricing for Washington, D.C. (WAS)-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Porto flights.
Search Deals
From District of Columbia to Porto
Search Deals
One-way flight from District of Columbia to Porto
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($126 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from District of Columbia to Porto 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 December 18, 2025.
Use the filters below to find and compare flights from District of Columbia to Porto that are best for you.

Fly from

District of Columbia

Fly to

Porto

Route

Depart

Return

Price

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 2/11

6:50 pm-10:30 am

1 stop10h 40m

Porto

Tue 2/17

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 1/11

6:50 pm-10:30 am

1 stop10h 40m

Porto

Thu 1/22

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 3/18

7:50 pm-10:30 am

1 stop10h 40m

Porto

Wed 3/25

5:00 am-5:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 2/15

6:50 pm-10:30 am

1 stop10h 40m

Porto

Wed 2/25

11:15 am-4:05 pm

1 stop33h 50m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 1/12

5:25 pm-11:15 am

1 stop12h 50m

Porto

Tue 1/20

12:05 pm-3:10 pm

1 stop32h 05m

$482

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 1/11

12:23 pm-10:30 am

2 stops17h 07m

Porto

Tue 1/20

5:00 am-4:05 pm

1 stop16h 05m

$483

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 2/15

12:38 pm-10:30 am

2 stops16h 52m

Porto

Wed 2/25

5:00 am-4:05 pm

1 stop16h 05m

$483

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 1/13

12:29 pm-10:30 am

2 stops17h 01m

Porto

Tue 1/20

5:00 am-4:05 pm

1 stop16h 05m

$483

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 3/24

1:19 pm-10:30 am

2 stops17h 11m

Porto

Tue 3/31

5:00 am-3:35 pm

1 stop15h 35m

$483

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 1/12

7:49 pm-10:30 am

2 stops33h 41m

Porto

Wed 1/21

11:15 am-4:05 pm

1 stop33h 50m

$488

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 39 results
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Best time to book a flight from District of Columbia to Porto

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

What is the cheapest month to book a flight from District of Columbia to Porto?

Currently, December is the cheapest month in which you can book a flight from District of Columbia to Porto (average of $348). Flying from District of Columbia to Porto in May is currently the most expensive (average of $688). 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 time of day to fly from DC to OPO?

Find hourly flight availability from District of Columbia to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

One of the essential ways to save on airfare from District of Columbia to Porto is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the morning could potentially save you up to 29% on airfare.

What is the cheapest day to fly from District of Columbia to Porto?

Use this chart to determine the cheapest time to fly round-trip from District of Columbia to Porto. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their District of Columbia to Porto flight should consider departing on Sunday afternoons when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from District of Columbia to Porto. 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 into for flights to Porto from District of Columbia?

    Porto (OPO) is the airport you will fly into if you book a flight from District of Columbia to Porto. It is only a 6.8 mi journey from Porto (OPO) to Porto’s city center.

  • How long is the flight from District of Columbia to Porto?

    For as low as $478, KLM can have you in Porto from District of Columbia in 10h 40m. There are 3537 mi between District of Columbia and Porto. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $222 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $260 and $378, respectively.

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

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

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

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

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

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

    Currently, December is the cheapest month in which you can book a flight from District of Columbia to Porto (average of $348). Flying from District of Columbia to Porto in May is currently the most expensive (average of $688). 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
Aveiro
Arcos de Valdevez
Coimbra
Vila Nova de Gaia

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Top 7 airlines flying from District of Columbia to Porto

Discover the top 7 airlines that operate flights from District of Columbia to Porto. 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$439Average$764FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$444Average$681FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$493Average$931FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$504Average$775FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$515Average$672FlexibilityNo cancel feeOn-time77%
KLMCheapest$555Average$741FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$615Average$693FlexibilityNo cancel feeOn-time76%

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