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$286+ 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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — OPO
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find 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 October 30, 2025.

This United Airlines deal was found by Cheapflights users on 10/28. 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.
Wed 11/195:25 pmIAD - OPO
1 stop12h 50mMultiple Airlines
Tue 12/1612:30 pmOPO - IAD
2 stops15h 51mMultiple Airlines
Deal found 10/28$488
This Delta deal was found by Cheapflights users on 10/27. 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.
Tue 11/1112:36 pmIAD - OPO
2 stops16h 54mDelta
Tue 11/1811:15 amOPO - IAD
2 stops18h 01mDelta
Deal found 10/27$492
This Delta deal was found by Cheapflights users on 10/30. 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.
Wed 12/311:13 amDCA - OPO
2 stops18h 17mDelta
Wed 12/106:00 amOPO - DCA
2 stops21h 57mDelta
Deal found 10/30$492
This FlightHub deal was found by Cheapflights users on 10/30. 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.
Wed 12/39:45 amIAD - OPO
2 stops22h 30mAir Canada
Mon 12/86:00 amOPO - IAD
2 stops43h 59mAir Canada
Deal found 10/30$495
This FlightHub deal was found by Cheapflights users on 10/30. 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.
Wed 12/36:00 amDCA - OPO
2 stops26h 15mAir Canada
Mon 12/86:00 amOPO - DCA
2 stops57h 21mAir Canada
Deal found 10/30$495
This United deal was found by Cheapflights users on 10/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/238:30 amIAD - OPO
2 stops25h 45mMultiple Airlines
Tue 12/96:00 amOPO - IAD
2 stops19h 26mMultiple Airlines
Deal found 10/28$496
This Delta deal was found by Cheapflights users on 10/28. 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.
Wed 11/1912:11 pmIAD - OPO
2 stops17h 19mDelta
Tue 12/1611:15 amOPO - IAD
2 stops17h 57mDelta
Deal found 10/28$498
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Wed 12/312:50 pmIAD - OPO
2 stops17h 50mUnited Airlines
Wed 12/106:00 amOPO - IAD
2 stops43h 26mUnited Airlines
Deal found 10/27$499
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Wed 12/36:00 amDCA - OPO
2 stops24h 40mUnited Airlines
Wed 12/1712:30 pmOPO - DCA
2 stops29h 43mUnited Airlines
Deal found 10/29$499
This CheapOair deal was found by Cheapflights users on 10/29. 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 12/311:05 amDCA - OPO
2 stops21h 10mMultiple Airlines
Mon 12/84:15 pmOPO - DCA
2 stops32h 30mMultiple Airlines
Deal found 10/29$501
This Priceline deal was found by Cheapflights users on 10/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/39:45 amIAD - OPO
2 stops22h 30mMultiple Airlines
Sun 12/76:15 amOPO - IAD
1 stop18h 50mMultiple Airlines
Deal found 10/29$502
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Wed 12/312:50 pmIAD - OPO
2 stops17h 50mUnited Airlines
Wed 12/176:00 amOPO - IAD
2 stops20h 14mUnited Airlines
Deal found 10/27$503

Cheap 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$492
(CheapOair)

One-way from

$286
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$598
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. 15% potential increase in price ($136 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 October 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 October 30, 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

Tue 11/11

12:36 pm-10:30 am

2 stops16h 54m

Porto

Tue 11/18

11:15 am-12:16 am

2 stops18h 01m

$492

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 12/3

9:45 am-1:15 pm

2 stops22h 30m

Porto

Wed 12/10

12:55 pm-8:59 pm

2 stops37h 04m

$492

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 12/9

2:55 pm-10:30 am

2 stops14h 35m

Porto

Tue 12/16

11:15 am-10:57 pm

2 stops16h 42m

$492

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 12/3

11:13 am-10:30 am

2 stops18h 17m

Porto

Wed 12/10

6:00 am-10:57 pm

2 stops21h 57m

$492

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Fri 1/16

10:30 pm-6:00 pm

1 stop14h 30m

Porto

Wed 1/21

10:00 am-9:00 pm

1 stop16h 00m

$499

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 12/3

12:50 pm-11:40 am

2 stops17h 50m

Porto

Wed 12/10

6:00 am-8:26 pm

2 stops43h 26m

$499

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Thu 11/27

5:33 pm-9:30 am

1 stop10h 57m

Porto

Thu 12/4

6:00 am-2:35 pm

1 stop13h 35m

$499

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 12/3

12:50 pm-11:40 am

2 stops17h 50m

Porto

Wed 12/17

6:00 am-9:14 pm

2 stops20h 14m

$503

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 12/29

10:33 pm-11:40 am

2 stops32h 07m

Porto

Fri 1/9

12:30 pm-11:53 am

2 stops28h 23m

$504

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 11/30

5:33 pm-9:30 am

1 stop10h 57m

Porto

Sat 12/13

6:00 am-7:29 am

2 stops30h 29m

$514

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 40 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, February is the cheapest month in which you can book a flight from District of Columbia to Porto (average of $406). 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 October 30, 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 Tuesday mornings 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 $499, Delta can have you in Porto from District of Columbia in 14h 30m. There are 3537 mi between District of Columbia and Porto. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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, February is the cheapest month in which you can book a flight from District of Columbia to Porto (average of $406). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for District of Columbia to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from District of Columbia to Porto

Discover the top 6 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$493Average$935FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$506Average$790FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$515Average$672FlexibilityNo cancel feeOn-time77%
DeltaCheapest$529Average$828FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$555Average$741FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$618Average$693FlexibilityNo cancel feeOn-time76%

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