IAD - OPO

$305 Find Cheap Flights from Washington Dulles Airport to Porto - Compare and Save

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Everything you should know

Cheapest round-trip
$623
Typical prices: $656-$995
SWISS
Sun 10/14Sat 10/20
IAD - OPO • 1 stop
Cheapest one-way
$305
Typical prices: $431-$604
Multiple Airlines
Tue 10/30
IAD - OPO • 3 stops
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
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When to book
25 weeks
in advance
Our data shows that travelers who book at least 25 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
When to travel
January
Cheapest • 26% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Brussels Bruxelles-National (BRU)
Cheapest • Avg $535 (round-trip)
Montreal Pierre Elliott Trudeau Intl (YUL)
Shortest trip • 11h 02m (one-way)
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We hope you love your trip to Porto!
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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

Wed, Oct 14 - Tue, Oct 20
SWISS Logo
8:20 pm - 6:30 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
17h 10m1 stop Zurich
SWISS Logo
8:40 am - 4:45 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
13h 05m1 stop Zurich
$623SWISS
Wed, Oct 14 - Tue, Oct 20
Multiple Airlines Logo
4:00 pm - 11:10 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
26h 10m3 stops Toronto Pearson Intl Madrid Barajas Lisbon Humberto Delgado
Multiple Airlines Logo
10:00 pm - 8:25 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
27h 25m3 stops Barcelona-El Prat Madrid Barajas Toronto Pearson Intl
$642Multiple Airlines
Thu, Nov 5 - Tue, Nov 10
Delta Logo
5:45 pm - 3:25 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
16h 40m1 stop Amsterdam Schiphol
Delta Logo
11:15 am - 3:55 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
33h 40m1 stop Amsterdam Schiphol
$647Delta
Fri, Nov 13 - Tue, Nov 17
Delta Logo
6:15 pm - 10:30 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
23h 15m1 stop Amsterdam Schiphol
Delta Logo
5:00 am - 3:45 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
15h 45m1 stop Amsterdam Schiphol
$647Delta
Sun, Nov 22 - Mon, Nov 30
United Airlines Logo
10:35 pm - 9:30 amIAD  Washington, D.C. Dulles Intl-OPO Porto
29h 55m1 stop Newark
United Airlines Logo
12:30 pm - 3:55 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
32h 25m1 stop Frankfurt am Main
$651United Airlines
Tue, Oct 13 - Sun, Oct 25
United Airlines Logo
3:45 pm - 7:00 amIAD  Washington, D.C. Dulles Intl-OPO Porto
10h 15m1 stop Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
6:00 am - 4:55 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
14h 55m1 stop Frankfurt am Main
$653United Airlines
Fri, Feb 26 - Wed, Mar 3
Air France Logo
1:00 pm - 10:35 amIAD  Washington, D.C. Dulles Intl-OPO Porto
16h 35m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle
Air France Logo
5:55 am - 12:20 amOPO  Porto-IAD Washington, D.C. Dulles Intl
23h 25m2 stops Paris Charles de Gaulle Atlanta Hartsfield-Jackson
$654Air France
Sun, Jan 24 - Sun, Feb 7
Air France Logo
1:00 pm - 10:35 amIAD  Washington, D.C. Dulles Intl-OPO Porto
16h 35m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle
Air France Logo
11:30 am - 11:02 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
16h 32m2 stops Paris Charles de Gaulle Detroit Metropolitan Wayne County
$655Air France
Fri, Oct 30 - Mon, Nov 16
KLM Logo
12:30 pm - 7:15 amIAD  Washington, D.C. Dulles Intl-OPO Porto
14h 45m1 stop New York John F Kennedy Intl
KLM Logo
10:15 am - 9:30 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
16h 15m2 stops New York John F Kennedy Intl Atlanta Hartsfield-Jackson
$656KLM
Fri, Oct 30 - Mon, Nov 16
KLM Logo
12:30 pm - 7:15 amIAD  Washington, D.C. Dulles Intl-OPO Porto
14h 45m1 stop New York John F Kennedy Intl
KLM Logo
10:15 am - 9:30 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
16h 15m2 stops New York John F Kennedy Intl Atlanta Hartsfield-Jackson
$657KLM
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 from Washington, D.C. Dulles Intl Airport to Porto 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 start at $623. Prices are below average for this route right now, with typical round-trip fares ranging from $656 to $995. The lowest price found in the past 5 days was $623 on SWISS.

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

Wednesday is the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Porto, it is 15% cheaper than the average day. Friday is the most expensive day with flight prices 10% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is 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 $597 round-trip.
  • June ($1,063) and July ($985) 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 prices 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 26% 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

$305
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 22% increase in price.
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 route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • 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.

  • 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).

  • 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

  • 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) - 80% of one-stop connections
    • Frankfurt am Main (FRA) - 6% of one-stop connections
    • Madrid Barajas (MAD) - 3% of one-stop connections
    • Newark (EWR) - 3% of one-stop connections

    Lisbon Humberto Delgado (LIS) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 24% on the Washington, D.C. Dulles Intl Airport to Porto route. Wednesday is the cheapest departure day at $691 round-trip on average, while Friday is the most expensive at $899, a difference of $208. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Porto?

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

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

    Last-minute fares on this route - booked within 2 weeks of departure - run 15% above the route average of $811. Book 25 weeks before departure for the lowest fares.

  • 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 0h 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 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 $380, which is 27% below the typical average for this route.

  • 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 52m 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 car rental options are available at Porto Airport (OPO)?

    Porto Airport (OPO) hosts 5 major car rental companies, with daily rates starting from around $2 for economy cars. Top options include:
    • Klass Wagen
    • Drive on Holiday
    • GREEN MOTION
    • Goldcar Rental SP
    • SURPRICE CAR RENTAL

  • 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 $656 to $995, with an average of $811 over the past 12 months. Anything below $656 counts as a good deal.

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 can be flexible, aim for a Wednesday departure instead of Friday. On this route, Wednesday flights average $691 - about $208 less than Friday (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 26% 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 $597 round-trip in that month - typically $466 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.
    - Opo Hotel Porto Aeroporto
  • 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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