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$241+ 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 11/28. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — OPO
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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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 septiembre 16, 2025.

Round-trip from

$544
(Mytrip)

One-way from

$241
(Mytrip)

Popular in

June

Cheapest in

November

Average price

$718
From District of Columbia to Porto
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One-way flight from District of Columbia to Porto
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Highest demand for flights based on searches. 18% potential increase in price ($159 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 septiembre 16, 2025.

This United Airlines deal was found by Cheapflights users on 9/13. 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.
jue. 11/65:33 pmIAD - OPO
1 stop10h 57mUnited Airlines
lun. 11/1712:35 pmOPO - IAD
1 stop13h 22mUnited Airlines
Deal found 9/13$544
This United Airlines deal was found by Cheapflights users on 9/13. 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.
sáb. 11/87:00 pmDCA - OPO
1 stop9h 30mUnited Airlines
lun. 11/1712:35 pmOPO - DCA
1 stop12h 00mUnited Airlines
Deal found 9/13$544
This Mytrip deal was found by Cheapflights users on 9/14. 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.
mié. 10/299:45 amIAD - OPO
3 stops25h 00mMultiple Airlines
mié. 11/58:05 pmOPO - IAD
2 stops25h 35mMultiple Airlines
Deal found 9/14$547
This KAYAK deal was found by Cheapflights users on 9/14. 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.
mar. 10/78:45 pmIAD - OPO
1 stop30h 00mSWISS
mié. 11/512:10 pmOPO - IAD
1 stop33h 30mSWISS
Deal found 9/14$549
This KAYAK deal was found by Cheapflights users on 9/13. 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.
vie. 11/78:30 pmIAD - OPO
1 stop33h 20mSWISS
dom. 11/166:35 pmOPO - IAD
2 stops51h 05mSWISS
Deal found 9/13$550
This oojo deal was found by Cheapflights users on 9/14. 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.
vie. 11/78:30 pmIAD - OPO
1 stop33h 20mSWISS
sáb. 11/1512:00 pmOPO - IAD
1 stop33h 40mSWISS
Deal found 9/14$551
This United Airlines deal was found by Cheapflights users on 9/15. 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.
vie. 11/712:00 pmDCA - OPO
2 stops21h 45mUnited Airlines
mar. 11/116:00 amOPO - DCA
2 stops32h 53mUnited Airlines
Deal found 9/15$552
This Delta deal was found by Cheapflights users on 9/15. 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.
mar. 10/76:30 pmIAD - OPO
1 stop16h 00mDelta
mar. 11/411:10 amOPO - IAD
1 stop13h 05mDelta
Deal found 9/15$553
This United Airlines deal was found by Cheapflights users on 9/13. 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.
jue. 11/65:00 pmDCA - OPO
1 stop11h 30mUnited Airlines
lun. 11/1712:35 pmOPO - DCA
1 stop13h 03mUnited Airlines
Deal found 9/13$554
This Booking.com deal was found by Cheapflights users on 9/15. 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.
vie. 11/710:55 pmIAD - OPO
2 stops18h 30mLufthansa
mar. 11/111:45 pmOPO - IAD
1 stop35h 20mLufthansa
Deal found 9/15$556
This Air Canada deal was found by Cheapflights users on 9/14. 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.
jue. 11/136:50 pmDCA - OPO
2 stops14h 55mMultiple Airlines
mar. 12/24:15 pmOPO - DCA
2 stops34h 41mMultiple Airlines
Deal found 9/14$564
This Delta deal was found by Cheapflights users on 9/15. 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.
mar. 10/76:30 pmIAD - OPO
1 stop16h 00mDelta
mié. 11/56:00 amOPO - IAD
2 stops18h 18mDelta
Deal found 9/15$565

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 septiembre 16, 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

jue. 11/6

5:33 pm-9:30 am

1 stop10h 57m

Porto

lun. 11/17

12:35 pm-8:57 pm

1 stop13h 22m

$544

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

sáb. 11/8

5:33 pm-9:30 am

1 stop10h 57m

Porto

dom. 11/16

6:00 am-3:50 pm

1 stop14h 50m

$551

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

vie. 11/7

12:00 pm-2:45 pm

2 stops21h 45m

Porto

mar. 11/11

6:00 am-9:53 am

2 stops32h 53m

$552

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 10/7

6:30 pm-3:30 pm

1 stop16h 00m

Porto

mar. 11/4

11:10 am-7:15 pm

1 stop13h 05m

$553

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

jue. 11/6

5:00 pm-9:30 am

1 stop11h 30m

Porto

lun. 11/17

12:35 pm-8:38 pm

1 stop13h 03m

$554

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

jue. 11/13

6:50 pm-2:45 pm

2 stops14h 55m

Porto

mar. 12/2

4:15 pm-9:56 pm

2 stops34h 41m

$564

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

vie. 10/24

9:20 pm-8:35 pm

1 stop18h 15m

Porto

dom. 11/2

5:00 am-5:05 pm

1 stop16h 05m

$564

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 10/7

9:20 pm-3:30 pm

1 stop13h 10m

Porto

mié. 11/5

6:00 am-7:18 pm

2 stops18h 18m

$565

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

jue. 10/30

11:55 pm-10:25 pm

2 stops18h 30m

Porto

jue. 11/6

6:00 am-3:50 pm

1 stop14h 50m

$566

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 10/7

9:20 pm-3:30 pm

1 stop13h 10m

Porto

lun. 11/3

11:25 am-4:35 pm

1 stop34h 10m

$566

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 33 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, January is the cheapest month in which you can book a flight from District of Columbia to Porto (average of $523). Flying from District of Columbia to Porto in June is currently the most expensive (average of $1,027). 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 septiembre 16, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from District of Columbia to Porto as you normally would.

How much does it cost to fly round-trip from District of Columbia to Porto?

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 $544, United Airlines can have you in Porto from District of Columbia in 10h 57m. 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, January is the cheapest month in which you can book a flight from District of Columbia to Porto (average of $523). Flying from District of Columbia to Porto in June is currently the most expensive (average of $1,027). 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

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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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$418Average$763FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$430Average$731FlexibilityNo cancel feeOn-time75%
TAP AIR PORTUGALCheapest$469Average$783FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$515Average$672FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$520Average$937FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$629Average$693FlexibilityNo cancel feeOn-time76%

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