Cheap flights from Dulles Intl (IAD) to Porto (OPO) from $274

This is the cheapest one-way flight price, found on 5/31. Prices may vary by date and flight preferences.
IAD — OPO
Jun 6 — Jun 131

How to find the cheapest flight from Dulles Intl (IAD) to Porto (OPO)

All the information you need to plan the best IAD to OPO flight in 2023: compare Dulles Intl to Porto flight prices with the expected peak season, weather and rainfall in Porto.

Popular in

December

Cheapest in

April

Round-trip from

$452

One-way from

$375
High demand for flights, 48% potential price rise
Best time to find cheap flights, 24% potential price drop
From Washington, D.C. Dulles Intl to Porto
One-way flight from Washington, D.C. Dulles Intl to Porto

IAD - OPO

Price

$452 - $1,173

OPO

Temperature

48.2 - 68 °F

OPO

Rainfall

0.7 - 7.7 inches

Cheap flights from Dulles Intl to Porto in June, July 2023

The best prices found for IAD to OPO flights for June, July
The lowest fares we've come across on flights traveling from Washington, D.C. to Porto in June and July 2023. For more flight deals, be sure to check back very soon.

Dulles Intl to Porto 2023 flight deals

Cheap flights to Porto from Dulles Intl found for this year
The lowest fares we've come across on flights traveling from Washington, D.C. to Porto in June and July 2023. For more flight deals, be sure to check back very soon.

Cheap Delta flights from Dulles Intl to Porto

Peruse some of the lowest-priced Delta flights we've found from Washington, D.C. to Porto. Deals update often to give you more flight options matching your criteria

Cheap Brussels Airlines flights from Dulles Intl to Porto

Some of the best deals we've found on Brussels Airlines flights traveling from Washington, D.C. to Porto. Deals frequently update to provide users with more options.

Last minute flights from Dulles Intl to Porto

Late deals on return flights to Porto from Dulles Intl, departing today and this week
Book one of these great deals on flights from Washington, D.C. to Porto. It's wise to confirm all flight details are correct before booking.

One-way flights to Porto from Dulles Intl

The cheapest one-way flights from Dulles Intl to Porto
Users in need of a one-way flight from Washington, D.C. to Porto can choose from these deals. Those seeking round-trip flights from Washington, D.C. to Porto should utilize the search form at the the top of the page.

Find flights from Dulles Intl to Porto within your budget

Use the slider to find flights from Dulles Intl to Porto that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$420 - $481

Route

Depart

Return

Price

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 11/19

1 stop11h 15m

Porto

Thu 11/23

1 stop15h 50m

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 9/10

1 stop17h 10m

Porto

Thu 9/21

1 stop29h 30m

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 10/16

1 stop10h 05m

Porto

Fri 10/20

1 stop11h 45m

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 11/28

2 stops18h 45m

Porto

Tue 12/19

1 stop35h 10m

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sat 11/18

1 stop11h 50m

Porto

Thu 11/23

1 stop15h 45m

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 10/18

1 stop10h 05m

Porto

Mon 10/23

1 stop11h 45m

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sat 11/18

1 stop12h 40m

Porto

Fri 11/24

1 stop30h 10m

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 10/16

2 stops27h 55m

Porto

Fri 10/20

1 stop11h 45m

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Thu 11/23

1 stop14h 05m

Porto

Wed 11/29

2 stops32h 15m

Flights are sorted by cheapest first

Deals found on 5/31

Reviews of Airlines Servicing Porto

To help decide which airline to fly from Washington, D.C. to Porto, see what other customers have to say about Delta, Brussels Airlines and Lufthansa. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
2,369 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

8.0

Reviews

1 / 10

The crew was amazing. They took such good care of us. I mistakenly thought our seats were changed and they investigated the issue. Later, I realized it was my mistake but they took great pains to rectify the issue. Also, the flight attendant that worked our section was so pleasant and helpful. Good flight

Delta
8.0
Very good
2,369 reviews
Delta
8.0
Very good
2,369 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

8.0

Reviews

1 / 10

The crew was amazing. They took such good care of us. I mistakenly thought our seats were changed and they investigated the issue. Later, I realized it was my mistake but they took great pains to rectify the issue. Also, the flight attendant that worked our section was so pleasant and helpful. Good flight

SWISS
7.6
Good
352 reviews
Delta
8.0
Very good
2,369 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

8.0

Reviews

1 / 10

The crew was amazing. They took such good care of us. I mistakenly thought our seats were changed and they investigated the issue. Later, I realized it was my mistake but they took great pains to rectify the issue. Also, the flight attendant that worked our section was so pleasant and helpful. Good flight

KLM
7.6
Good
160 reviews
Delta
8.0
Very good
2,369 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

8.0

Reviews

1 / 10

The crew was amazing. They took such good care of us. I mistakenly thought our seats were changed and they investigated the issue. Later, I realized it was my mistake but they took great pains to rectify the issue. Also, the flight attendant that worked our section was so pleasant and helpful. Good flight

American Airlines
7.3
Good
2,149 reviews
Delta
8.0
Very good
2,369 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

8.0

Reviews

1 / 10

The crew was amazing. They took such good care of us. I mistakenly thought our seats were changed and they investigated the issue. Later, I realized it was my mistake but they took great pains to rectify the issue. Also, the flight attendant that worked our section was so pleasant and helpful. Good flight

Iberia
7.1
Good
582 reviews
Delta
8.0
Very good
2,369 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

8.0

Reviews

1 / 10

The crew was amazing. They took such good care of us. I mistakenly thought our seats were changed and they investigated the issue. Later, I realized it was my mistake but they took great pains to rectify the issue. Also, the flight attendant that worked our section was so pleasant and helpful. Good flight

Related info for your journey

Useful info, stats and facts about Dulles Intl to Porto flights.

Alternative routes for Dulles Intl to Porto

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Dulles Intl to Porto

The chart below displays the airlines Cheapflights users traveling from Dulles Intl to Porto choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
SWISSCheapest$283Average$457FlexibilityNo cancel feeOn-time79%COVID-19 safety
Search SWISS flights
TAP AIR PORTUGALCheapest$360Average$762FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search TAP AIR PORTUGAL flights
IberiaCheapest$393Average$603FlexibilityNo cancel feeOn-time77%COVID-19 safety
Search Iberia flights
American AirlinesCheapest$401Average$775FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
United AirlinesCheapest$407Average$696FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
LufthansaCheapest$408Average$500FlexibilityNo cancel feeOn-time76%COVID-19 safety
Search Lufthansa flights
KLMCheapest$411Average$467FlexibilityNo cancel feeOn-time75%COVID-19 safety
Search KLM flights
DeltaCheapest$417Average$639FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
Brussels AirlinesCheapest$426Average$451FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Brussels Airlines flights
Air FranceCheapest$434Average$761FlexibilityNo cancel feeOn-time77%COVID-19 safety
Search Air France flights
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