OPO - IAD

$428 Find Cheap Flights from Porto to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Porto to Dulles Intl departing on 6/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto to Washington, D.C., as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$643
Typical prices: $800-$738
SWISS
Wed 10/14Wed 10/21
OPO - IAD • 1 stop
Cheapest one-way
$428
Typical prices: $422-$582
Royal Air Maroc
Sun 6/7
OPO - IAD • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Porto and Dulles Intl. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Frankfurt am Main (FRA)
Cheapest • Avg $595 (round-trip)
Paris (CDG)
Shortest trip • 12h 30m (one-way)
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 100% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Dulles Intl!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Porto to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Porto to Dulles Intl

Wed, Oct 14 - Wed, Oct 21
SWISS Logo
6:45 pm - 4:45 pm
OPO
-
IAD
27h 00m
1 stop
SWISS Logo
8:20 pm - 6:30 pm
IAD
-
OPO
17h 10m
1 stop
$643SWISS
Mon, May 25 - Sat, Jan 30
TAP AIR PORTUGAL Logo
10:30 pm - 3:10 pm
OPO
-
IAD
21h 40m
1 stop
TAP AIR PORTUGAL Logo
5:25 pm - 11:00 am
IAD
-
OPO
12h 35m
1 stop
$661TAP AIR PORTUGAL
Thu, Oct 1 - Thu, Nov 5
SWISS Logo
7:20 pm - 4:45 pm
OPO
-
IAD
26h 25m
1 stop
SWISS Logo
8:30 pm - 7:50 am
IAD
-
OPO
30h 20m
1 stop
$671SWISS
Mon, Jun 1 - Sun, Jun 14
SWISS Logo
7:20 pm - 3:30 pm
OPO
-
IAD
25h 10m
1 stop
SWISS Logo
8:20 pm - 6:15 pm
IAD
-
OPO
16h 55m
1 stop
$687SWISS
Mon, May 25 - Sun, Jun 7
United Airlines Logo
6:00 am - 3:15 pm
OPO
-
IAD
14h 15m
1 stop
United Airlines Logo
6:33 am - 6:55 am
IAD
-
OPO
19h 22m
1 stop
$698United Airlines
Fri, Nov 6 - Mon, Nov 9
United Airlines Logo
6:00 am - 3:50 pm
OPO
-
IAD
14h 50m
1 stop
United Airlines Logo
12:35 pm - 9:30 am
IAD
-
OPO
15h 55m
1 stop
$699United Airlines
Fri, Nov 6 - Mon, Nov 9
United Airlines Logo
6:00 am - 3:50 pm
OPO
-
IAD
14h 50m
1 stop
United Airlines Logo
5:20 pm - 9:30 am
IAD
-
OPO
11h 10m
1 stop
$700United Airlines
Fri, Jun 5 - Fri, Jun 12
United Airlines Logo
6:00 am - 4:05 pm
OPO
-
IAD
15h 05m
1 stop
United Airlines Logo
5:42 pm - 9:45 am
IAD
-
OPO
11h 03m
1 stop
$702United Airlines
Wed, Oct 14 - Wed, Oct 21
United Airlines Logo
6:00 am - 4:05 pm
OPO
-
IAD
15h 05m
1 stop
United Airlines Logo
8:35 am - 7:00 am
IAD
-
OPO
17h 25m
2 stops
$703United Airlines
Thu, Oct 1 - Thu, Nov 5
United Airlines Logo
6:00 am - 4:05 pm
OPO
-
IAD
15h 05m
1 stop
United Airlines Logo
12:35 pm - 11:40 am
IAD
-
OPO
18h 05m
2 stops
$705United Airlines
Booking Insights

KAYAK's insights & trends for Porto to Dulles Intl flights

Get data-powered insights and trends into flights from Porto to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Porto to Washington, D.C. Dulles Intl Airport departing in October.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Porto to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Porto to Washington, D.C. Dulles Intl Airport is September, where tickets cost $0 (return) on average. On the other hand, the most expensive months are July and January, where the average cost of round-trip tickets is $1,194 and $1,156 respectively.

Find deals

Good to know

Low seasonMarch
Cheapest flight$428
Best time to beat the crowds with an average 40% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from Porto to Washington Dulles 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
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Porto to Washington Dulles Airport flights

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

    In the last 3 days, the lowest price for a flight from Porto to Washington, D.C. Dulles Intl Airport was $428 for a one-way ticket and $643 for a round-trip.

  • Do I need a passport to fly between Porto and Washington Dulles Airport?

    Yes

  • Which airports will I be using when flying from Porto to Washington Dulles Airport?

    On your way to Washington Dulles Airport, you’ll fly out from Porto. You’ll be landing at Washington, D.C. Dulles Intl.

  • Which aircraft models fly most regularly from Porto to Washington Dulles Airport?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Porto to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Porto to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Porto to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Porto is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Porto to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Porto with another airline. Booking your flights between Porto and IAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Porto to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Porto up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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)