OPO - IAD

$346 Find Cheap Flights from Porto to Washington Dulles Airport - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$573
Typical prices: $583-$808
Iberia
Tue 10/23Wed 10/31
OPO - IAD • 1 stop
Cheapest one-way
$346
Typical prices: $505-$774
Iberia
Sat 10/20
OPO - IAD • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Porto and Washington, D.C. Dulles Intl Airport. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
March
Cheapest • 33% price drop
September
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Frankfurt am Main (FRA)
Cheapest • Avg $570 (round-trip)
Lisbon Humberto Delgado (LIS)
Shortest trip • 11h 13m (one-way)
Insights
Insights
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We hope you love your trip to Washington, D.C. Dulles Intl Airport!
Flight Deals
Booking Insights
Flight Deals

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

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

Recent round-trip flight deals from Porto to Dulles Intl

Fri, Oct 23 - Sat, Oct 31
Iberia Logo
8:20 am - 3:40 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
12h 20m1 stop Madrid Barajas
Iberia Logo
6:50 pm - 11:45 amIAD  Washington, D.C. Dulles Intl-OPO Porto
12h 55m1 stop Madrid Barajas
$573Iberia
Thu, Sep 17 - Fri, Oct 2
American Airlines Logo
8:20 am - 6:55 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
15h 35m1 stop Madrid Barajas
American Airlines Logo
5:00 pm - 11:45 amIAD  Washington, D.C. Dulles Intl-OPO Porto
13h 45m1 stop Madrid Barajas
$591American Airlines
Fri, Oct 23 - Sat, Oct 31
Iberia Logo
8:20 am - 3:40 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
12h 20m1 stop Madrid Barajas
Iberia Logo
7:05 pm - 4:00 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
16h 55m2 stops London Heathrow Madrid Barajas
$592Iberia
Thu, Nov 26 - Sun, Nov 29
TAP AIR PORTUGAL Logo
7:00 am - 3:15 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
13h 15m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
10:30 pm - 6:00 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
14h 30m1 stop Lisbon Humberto Delgado
$593TAP AIR PORTUGAL
Thu, Oct 15 - Sun, Oct 18
American Airlines Logo
8:20 am - 7:00 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
15h 40m1 stop Madrid Barajas
American Airlines Logo
5:00 pm - 11:45 amIAD  Washington, D.C. Dulles Intl-OPO Porto
13h 45m1 stop Madrid Barajas
$594American Airlines
Thu, Oct 15 - Sun, Oct 18
American Airlines Logo
8:20 am - 7:00 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
15h 40m1 stop Madrid Barajas
American Airlines Logo
5:01 am - 7:40 amIAD  Washington, D.C. Dulles Intl-OPO Porto
21h 39m2 stops Charlotte Douglas Madrid Barajas
$594American Airlines
Thu, Sep 17 - Wed, Sep 30
Multiple Airlines Logo
12:25 pm - 6:55 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
11h 30m1 stop Madrid Barajas
Multiple Airlines Logo
5:00 pm - 11:45 amIAD  Washington, D.C. Dulles Intl-OPO Porto
13h 45m1 stop Madrid Barajas
$594Multiple Airlines
Tue, Sep 15 - Tue, Sep 22
TAP AIR PORTUGAL Logo
10:30 pm - 3:10 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
21h 40m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
5:05 pm - 8:00 amIAD  Washington, D.C. Dulles Intl-OPO Porto
9h 55m1 stop Lisbon Humberto Delgado
$596TAP AIR PORTUGAL
Thu, Nov 12 - Tue, Nov 24
TAP AIR PORTUGAL Logo
8:30 am - 3:15 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
11h 45m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
5:25 pm - 10:00 amIAD  Washington, D.C. Dulles Intl-OPO Porto
11h 35m1 stop Lisbon Humberto Delgado
$602TAP AIR PORTUGAL
Tue, Sep 15 - Tue, Sep 22
TAP AIR PORTUGAL Logo
9:15 pm - 3:10 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
22h 55m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
10:35 pm - 5:00 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
13h 25m1 stop Lisbon Humberto Delgado
$602TAP AIR PORTUGAL
Booking Insights

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

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Porto to Washington, D.C. Dulles Intl Airport with more confidence.

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

Round-trip flights from Porto to Washington, D.C. Dulles Intl Airport start at $573. Prices are below average for this route right now, with typical round-trip fares ranging from $583 to $808. The lowest price found in the past 5 days was $573 on Iberia.

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

Monday is the cheapest day of the week to fly from Porto to Washington, D.C. Dulles Intl Airport, it is 16% cheaper than the average day. Friday is the most expensive day with flight prices 9% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • March is the cheapest month to fly from Porto to Washington, D.C. Dulles Intl Airport at $475 round-trip.
  • September ($1,127) and January ($1,077) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 137% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

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

Low season

January

Cheapest flight

$346
Best time to beat the crowds but there is an average 52% increase in price.
Most popular time to fly with an average 59% increase in price.
Flight from Porto to Washington, D.C. Dulles Intl Airport

When to book flights from Porto to Dulles Intl

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

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

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

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

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

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

    Only Economy Class is available on flights from Porto to Washington, D.C. Dulles Intl Airport.

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

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

    • Lisbon Humberto Delgado (LIS) - 50% of one-stop connections
    • Madrid Barajas (MAD) - 29% of one-stop connections
    • Frankfurt am Main (FRA) - 13% of one-stop connections
    • Amsterdam Schiphol (AMS) - 4% 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 Porto to Washington, D.C. Dulles Intl Airport?

    Yes. Being flexible with your travel dates can save you up to 23% on the Porto to Washington, D.C. Dulles Intl Airport route. Monday is the cheapest departure day at $602 round-trip on average, while Friday is the most expensive at $778, a difference of $176. 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 Washington, D.C. Dulles Intl Airport?

    Some of the most popular sights in Washington, D.C. Dulles Intl Airport are Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. Dulles Intl Airport on KAYAK.

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

    A nonstop flight from Porto to Washington, D.C. Dulles Intl Airport takes 0h 00m, covering 3,537 miles.

  • What are the earliest and latest flights from Porto to Washington, D.C. Dulles Intl Airport?

    These are the earliest and latest flight times available from Porto to Washington, D.C. Dulles Intl Airport:

    • Earliest: departs at 12:00 am and lands at 12:00 am
    • Latest: departs at 12:00 am and lands at 12:00 am.

    The flight takes about 0h 00m.

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

    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.

  • Have flight prices from Porto to Washington, D.C. Dulles Intl Airport 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 $3,075. That means the highest observed fare was about 5x higher than the lowest one.

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

    One-way fares from Porto to Washington, D.C. Dulles Intl Airport are currently lower than usual. Average one-way flight prices are about $404, which is 34% below the typical average for this route.

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

    Flying via Lisbon Humberto Delgado (LIS) gives the shortest average 1-stop total travel time at 11h 13m, compared with 12h 57m via Madrid Barajas (MAD) and 13h 44m via Frankfurt am Main (FRA).

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

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

  • What car rental options are available at Washington, D.C. Dulles Intl Airport (IAD)?

    Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates starting from around $24 for economy cars. Top options include:
    · Dollar
    · Budget
    · Hertz
    · Sixt
    · Thrifty

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

    Round-trip flights from Porto to Washington, D.C. Dulles Intl Airport range from $583 to $808, with an average of $710 over the past 12 months. Anything below $583 counts as a good deal.

Your guide to booking Porto to Washington, D.C. Dulles Intl Airport 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 Monday departure instead of Friday. On this route, Monday flights average $602 - about $176 less than Friday (23% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Porto to Washington, D.C. Dulles Intl Airport trip for March. Fares historically average $475 round-trip in that month - typically $652 less than the most expensive month, which is September (based on the last 12 months).

Everything you need to know for your flight from Porto to Dulles Intl

Information on your arrival and departure airports

Porto (OPO)
Dulles Intl (IAD)