IAD - OPO

$220 Find Cheap Flights from Washington Dulles Airport to Porto - Compare and Save

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Everything you should know

Cheapest round-trip
$573
Typical prices: $691-$1,022
TAP AIR PORTUGAL
Fri 2/16Mon 2/26
IAD - OPO • 1 stop
Cheapest one-way
$221
Typical prices: $459-$629
TAP AIR PORTUGAL
Fri 11/16
IAD - OPO • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. Dulles Intl Airport and Porto. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
25 weeks
in advance
Our data shows that travelers who book at least 25 weeks in advance save around 30% compared to booking last minute.
Insights
Insights
When to travel
January
Cheapest • 29% price drop
August
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Munich Franz Josef Strauss (MUC)
Cheapest • Avg $665 (round-trip)
Montreal Pierre Elliott Trudeau Intl (YUL)
Shortest trip • 11h 02m (one-way)
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Flight Deals

Cheap Flights from Dulles Intl to Porto (IAD-OPO)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Porto

Tue, Feb 16 - Fri, Feb 26
TAP AIR PORTUGAL Logo
5:25 pm - 11:00 amIAD  Washington, D.C. Dulles Intl-OPO Porto
12h 35m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
8:30 am - 8:30 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
17h 00m1 stop Lisbon Humberto Delgado
$573TAP AIR PORTUGAL
Sun, Dec 13 - Sun, Dec 20
TAP AIR PORTUGAL Logo
10:30 pm - 12:30 amIAD  Washington, D.C. Dulles Intl-OPO Porto
21h 00m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
6:00 pm - 2:45 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
25h 45m1 stop Lisbon Humberto Delgado
$574TAP AIR PORTUGAL
Mon, Nov 30 - Fri, Dec 11
Multiple Airlines Logo
5:25 pm - 10:15 amIAD  Washington, D.C. Dulles Intl-OPO Porto
11h 50m1 stop Lisbon Humberto Delgado
Multiple Airlines Logo
6:15 am - 7:05 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
17h 50m2 stops Madrid Barajas Casablanca Mohamed V
$578Multiple Airlines
Sat, Nov 28 - Fri, Dec 11
Multiple Airlines Logo
5:25 pm - 9:50 amIAD  Washington, D.C. Dulles Intl-OPO Porto
11h 25m1 stop Lisbon Humberto Delgado
Multiple Airlines Logo
6:15 am - 7:05 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
17h 50m2 stops Madrid Barajas Casablanca Mohamed V
$578Multiple Airlines
Mon, Apr 12 - Fri, Apr 16
United Airlines Logo
5:20 pm - 9:45 amIAD  Washington, D.C. Dulles Intl-OPO Porto
11h 25m1 stop Newark
United Airlines Logo
6:00 am - 3:55 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
14h 55m1 stop Frankfurt am Main
$723United Airlines
Mon, Apr 12 - Tue, Apr 20
United Airlines Logo
12:35 pm - 9:45 amIAD  Washington, D.C. Dulles Intl-OPO Porto
16h 10m1 stop Newark
United Airlines Logo
6:00 am - 3:05 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
14h 05m1 stop Frankfurt am Main
$723United Airlines
Wed, Mar 24 - Tue, Mar 30
Delta Logo
7:40 pm - 10:35 amIAD  Washington, D.C. Dulles Intl-OPO Porto
10h 55m1 stop Paris Charles de Gaulle
Delta Logo
5:00 am - 3:35 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
15h 35m1 stop Amsterdam Schiphol
$724Delta
Wed, Apr 7 - Thu, Apr 15
Delta Logo
9:45 pm - 10:00 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
19h 15m1 stop Paris Charles de Gaulle
Delta Logo
11:45 am - 3:35 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
32h 50m1 stop Amsterdam Schiphol
$724Delta
Wed, Dec 2 - Fri, Dec 11
KLM Logo
6:40 pm - 10:35 amIAD  Washington, D.C. Dulles Intl-OPO Porto
10h 55m1 stop Paris Charles de Gaulle
KLM Logo
5:00 am - 4:23 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
16h 23m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
$739KLM
Sat, Apr 10 - Fri, Apr 16
KLM Logo
9:45 pm - 3:25 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
12h 40m1 stop Paris Charles de Gaulle
KLM Logo
5:00 am - 4:30 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
16h 30m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
$783KLM
Booking Insights

Price, demand and travel trends for Washington, D.C. Dulles Intl Airport to Porto flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to Porto?

Round-trip flights from Washington, D.C. Dulles Intl Airport to Porto typically range from $691 to $1,022. The lowest price found in the past 5 days was $573, on TAP AIR PORTUGAL.

What's the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Porto?

Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Porto. It’s 9% cheaper than the average day, while Thursday is the most expensive, with prices 18% higher.

What’s the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Porto?

•January is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Porto at $599 round-trip.
•June ($1,067) and December ($1,061) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 78% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Washington, D.C. Dulles Intl Airport to Porto the cheapest?

Flights from Washington, D.C. Dulles Intl Airport to Porto are cheapest 25 weeks before departure. Booking in this window typically costs about 30% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for Washington, D.C. Dulles Intl Airport to Porto flights

Low season

January

Cheapest flight

$221
Beat the crowds with an average 62% drop in travelers.
The most popular month to fly with an average 73% increase in travelers.
One-way flight from Washington, D.C. Dulles Intl Airport to Porto

When to book flights from Dulles Intl to Porto

Are your dates flexible? Find out the best times to travel from Dulles Intl to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Washington, D.C. Dulles Intl Airport to Porto flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Washington, D.C. Dulles Intl Airport to Porto?

    Three cabin classes are available on flights from Washington, D.C. Dulles Intl Airport to Porto:

    • Economy Class
    • Premium Economy Class
    • Business Class

  • How long is a flight from Washington, D.C. Dulles Intl Airport to Porto?

    A nonstop flight from Washington, D.C. Dulles Intl Airport to Porto takes 00m, covering 3,537 miles.

  • Do I need a passport to fly from Washington, D.C. Dulles Intl Airport to Porto?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Washington, D.C. Dulles Intl Airport to Porto flight?

    Round-trip flights from Washington, D.C. Dulles Intl Airport to Porto range from $691 to $1,022, with an average of $845 over the past 12 months. Anything below $691 counts as a good deal.

  • How expensive are last-minute Washington, D.C. Dulles Intl Airport to Porto flights?

    Last-minute fares on this route (booked within two weeks of departure) run 22% above the $845 route average. Book 25 weeks before departure for the lowest fares.

  • Have flight prices from Washington, D.C. Dulles Intl Airport to Porto changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $573 to $5,531. That means the highest observed fare was about 10x higher than the lowest one.

  • How are flight prices from Washington, D.C. Dulles Intl Airport to Porto looking right now?

    One-way fares from Washington, D.C. Dulles Intl Airport to Porto are currently lower than usual. Average one-way flight prices are about $330, which is 39% below the typical average for this route.

  • What car rental options are available at Porto Airport (OPO)?

    Porto Airport (OPO) hosts 5 major car rental companies, with daily rates averaging $23 for economy cars. Top options include:

    • GREEN MOTION
    • Drive on Holiday
    • Klass Wagen
    • Goldcar Rental SP
    • Sixt

  • Which airports can I use when flying from Washington, D.C. Dulles Intl Airport to Porto?

    Flights from Washington, D.C. Dulles Intl Airport to Porto usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at Porto (OPO).

  • Which airports do connecting flights from Washington, D.C. Dulles Intl Airport to Porto pass through?

    One-stop flights from Washington, D.C. Dulles Intl Airport to Porto most commonly connect through:

    • Lisbon Humberto Delgado (LIS) - 83% of one-stop connections
    • Frankfurt am Main (FRA) - 4% of one-stop connections
    • Madrid Barajas (MAD) - 3% of one-stop connections
    • Newark (EWR) - 2% of one-stop connections

  • Can I save money by using flexible dates for flights from Washington, D.C. Dulles Intl Airport to Porto?

    Yes. Flexible dates can save you up to 23% on flights from Washington, D.C. Dulles Intl Airport to Porto. Monday is the cheapest departure day at $774 round-trip on average, while Thursday is the most expensive at $1,000, a difference of $226.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Washington, D.C. Dulles Intl Airport to Porto?

    Flying via Montreal Pierre Elliott Trudeau Intl (YUL) gives the shortest average 1-stop total travel time at 11h 02m, compared with 11h 19m via New York John F Kennedy Intl (JFK) and 11h 49m via Lisbon Humberto Delgado (LIS).

  • What is the time difference between Washington, D.C. Dulles Intl Airport and Porto?

    Porto is 5 hours ahead of Washington, D.C. Dulles Intl Airport (Western European Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Porto?

    Some of the most popular sights in Porto are Ribeira Square, Avenida dos Aliados and Mercado do Bolhão. These are among the most viewed places in Porto on KAYAK.

  • How much luggage can I bring with me from Washington Dulles (IAD) to Porto (OPO)?

    The base fares on KLM, Delta, and TAP Air Portugal include one personal item and a carry-on free of charge. Any checked bags must be paid for separately. Another alternative would be to upgrade your ticket, which would increase your baggage allowance. The Standard fare with KLM includes one checked bag of up to 50 lbs. With Business class on American Airlines, you will have your carry-on and two checked bags included.

  • Can I fly with a service animal from Washington Dulles (IAD) to Porto (OPO)?

    On TAP Air Portugal, the dog must be a certified service animal (SVAN) with the appropriate paperwork and vaccination records. If they meet all the requirements, they are permitted to travel in the cabin, outside a carrier. You can request any special assistance services up to 48 hours before your trip.

  • Do I need a visa to fly to Porto?

    Portugal is a member of the EU, so American citizens and permanent residents do not need a visa to enter. Your stay in Portugal, or any other EU country, must not exceed 90 days and can only be for travel. You will be required to have a valid passport with at least 6 months of validity and at least one blank page for the stamps.

  • How do I get from Francisco Carneiro Airport (OPO) to the city center in Porto?

    If you are on a budget, then the metro is the most affordable way to get into the city. There is a station located directly at the airport and the trains run from 5 am to 1:15 am. It will take you around 30 minutes to reach the city center. Taxis are also readily available, the ride will cost around €20 to €30 ($22 to $33). For the most ease and comfort, you can book a private transfer from a service like Welcome Pickups.

Your guide to booking Washington, D.C. Dulles Intl Airport to Porto flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Monday departure and avoid flying on Thursday. On this route, Monday flights average $774, about $226 less than Thursday fares (23% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 25 weeks before you fly. On this route, that window historically saves about 30% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Washington, D.C. Dulles Intl Airport to Porto trip for January. Fares historically average $599 round-trip in that month - typically $468 less than the most expensive month, which is June (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Porto Airport.

    • Ap Aeroporto Porto
  • All flights along this route from Washington Dulles Airport (IAD) to Porto (OPO) will have at least one stop. Amsterdam (AMS), Madrid (MAD), Lisbon (LIS), and Paris (CDG) are the most common layover cities.
  • Flights on KLM along this route will often have a long layover in their hub city, Amsterdam (AMS). All passengers can access the two Crown Lounges for free. If you upgrade to Business class, lounge access will be included.
  • All airlines give a 24-hour window from the time of booking in which you can modify your flight for free. You can keep your travel plans flexible by upgrading to Standard fare on KLM – which allows ticket changes for free, or their Flex fare – which is refundable if you need to cancel.
  • With TAP Air Portugal, you might be able to get a deal on your upgrade with their auction feature. Up to 36 hours before your flight, you can bid the amount you’re willing to pay and will receive a confirmation if accepted.
  • KLM welcomes families on board by ensuring they are seated together and providing special entertainment for the kids. They offer activity packs and special kid's meals to keep your little ones happy during the flight.

More options for your flight from Dulles Intl to Porto

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