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$247+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — OPO
Jul 30 — Aug 61
Wed 7/30
Wed 8/6
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 July 25, 2025.

Round-trip from

$579
(Flightnetwork)

One-way from

$247
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$821
From District of Columbia to Porto
Search Deals
One-way flight from District of Columbia to Porto
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Highest demand for flights based on searches. 19% potential increase in price ($169 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 25, 2025.

This Flightnetwork deal was found by Cheapflights users on 7/23. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/182:25 pmIAD - OPO
2 stops14h 10mMultiple Airlines
Wed 9/36:15 amOPO - IAD
1 stop18h 10mMultiple Airlines
Deal found 7/23$579
This Iberia deal was found by Cheapflights users on 7/23. 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.
Mon 11/39:45 pmIAD - OPO
2 stops17h 15mIberia
Tue 11/118:20 amOPO - IAD
1 stop13h 10mIberia
Deal found 7/23$583
This Cheapflightsfares deal was found by Cheapflights users on 7/24. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1410:20 pmIAD - OPO
1 stop20h 00mLufthansa
Thu 10/236:15 amOPO - IAD
2 stops14h 35mLufthansa
Deal found 7/24$584
This FlightHub deal was found by Cheapflights users on 7/22. 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.
Sun 8/249:40 pmIAD - OPO
1 stop37h 10mTurkish Airlines
Tue 9/304:50 pmOPO - IAD
1 stop23h 55mTurkish Airlines
Deal found 7/22$586
This Cheapflightsfares deal was found by Cheapflights users on 7/24. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1510:20 pmIAD - OPO
1 stop11h 40mTAP AIR PORTUGAL
Mon 9/2210:35 pmOPO - IAD
1 stop21h 45mTAP AIR PORTUGAL
Deal found 7/24$592
This Mytrip deal was found by Cheapflights users on 7/23. 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.
Thu 9/49:40 amDCA - OPO
2 stops19h 55mMultiple Airlines
Thu 9/116:25 amOPO - DCA
2 stops16h 39mMultiple Airlines
Deal found 7/23$592
This British Airways deal was found by Cheapflights users on 7/23. 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.
Sun 11/29:45 pmIAD - OPO
1 stop13h 55mBritish Airways
Sun 11/98:05 pmOPO - IAD
1 stop24h 30mBritish Airways
Deal found 7/23$596
This SWISS deal was found by Cheapflights users on 7/24. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/289:30 pmIAD - OPO
2 stops30h 55mSWISS
Wed 11/52:10 pmOPO - IAD
2 stops31h 30mSWISS
Deal found 7/24$599
This United Airlines deal was found by Cheapflights users on 7/24. 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.
Thu 11/135:33 pmIAD - OPO
1 stop10h 57mUnited Airlines
Sun 11/166:00 amOPO - IAD
1 stop14h 50mUnited Airlines
Deal found 7/24$601
This Delta deal was found by Cheapflights users on 7/23. 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.
Sun 11/911:00 amDCA - OPO
2 stops18h 30mDelta
Mon 11/176:30 amOPO - DCA
2 stops21h 59mDelta
Deal found 7/23$602
This American Airlines deal was found by Cheapflights users on 7/23. 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.
Wed 10/11:39 pmDCA - OPO
2 stops12h 56mAmerican Airlines
Fri 10/1012:20 pmOPO - DCA
2 stops15h 37mAmerican Airlines
Deal found 7/23$608
This deal was found by Cheapflights users on 7/24. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/154:35 pmDCA - OPO
1 stop12h 00mAir Canada
Tue 9/2312:50 pmOPO - DCA
1 stop14h 01mAir Canada
Deal found 7/24$609

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 July 25, 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

Mon 8/18

2:25 pm-9:35 am

2 stops14h 10m

Porto

Wed 9/3

6:15 am-7:25 pm

1 stop18h 10m

$579

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 11/3

9:45 pm-8:00 pm

2 stops17h 15m

Porto

Tue 11/11

8:20 am-4:30 pm

1 stop13h 10m

$583

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 10/14

10:20 pm-11:20 pm

1 stop20h 00m

Porto

Thu 10/23

6:15 am-3:50 pm

2 stops14h 35m

$584

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 8/24

9:40 pm-3:50 pm

1 stop37h 10m

Porto

Tue 9/30

4:50 pm-11:45 am

1 stop23h 55m

$586

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 9/15

10:20 pm-3:00 pm

1 stop11h 40m

Porto

Mon 9/22

10:35 pm-3:20 pm

1 stop21h 45m

$592

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Thu 9/4

9:40 am-10:35 am

2 stops19h 55m

Porto

Thu 9/11

6:25 am-6:04 pm

2 stops16h 39m

$592

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 11/2

9:45 pm-4:40 pm

1 stop13h 55m

Porto

Sun 11/9

8:05 pm-3:35 pm

1 stop24h 30m

$596

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 10/28

9:30 pm-8:25 am

2 stops30h 55m

Porto

Wed 11/5

2:10 pm-4:40 pm

2 stops31h 30m

$599

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Thu 11/13

5:33 pm-9:30 am

1 stop10h 57m

Porto

Sun 11/16

6:00 am-3:50 pm

1 stop14h 50m

$601

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 11/9

11:00 am-10:30 am

2 stops18h 30m

Porto

Mon 11/17

6:30 am-11:29 pm

2 stops21h 59m

$602

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/22

Showing 1-10 of 29 results
1
2
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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 $1,031). 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 July 25, 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.

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated July 25, 2025.
Read reviews from past customers who have flown Delta, KLM, and United Airlines from District of Columbia to Porto. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,967 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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
7,967 reviews
Delta
8.0
Very good
7,967 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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
1,375 reviews
Delta
8.0
Very good
7,967 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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
8,876 reviews
Delta
8.0
Very good
7,967 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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!
Turkish Airlines
7.3
Good
3,916 reviews
Delta
8.0
Very good
7,967 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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!
Scandinavian Airlines
7.3
Good
1,442 reviews
Delta
8.0
Very good
7,967 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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 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.

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

    $255 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 Air Canada and United Airlines, with prices starting from $364 and $369, 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, 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 $1,031). 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
Coimbra
Matosinhos

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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 8 airlines flying from District of Columbia to Porto

Discover the top 8 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 July 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$418Average$740FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$424Average$703FlexibilityNo cancel feeOn-time75%
TAP AIR PORTUGALCheapest$460Average$763FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$515Average$736FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$520Average$944FlexibilityNo cancel feeOn-time69%
SWISSCheapest$542Average$651FlexibilityNo cancel feeOn-time79%
American AirlinesCheapest$573Average$736FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$603Average$692FlexibilityNo cancel feeOn-time76%

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