Question 1

What is the cheapest flight from Porto to Washington, D.C.?

Accepted Answer

In the last 3 days, the lowest price for a flight from Porto to Washington, D.C. was $367 for a one-way ticket and $443 for a round-trip. <a href='/flight-routes/Porto-OPO/Washington-WAS'>Visit our flight page for the latest deals!>/a>

Question 2

Do I need a passport to fly between Porto and Washington, D.C.?

Accepted Answer

Yes <a href='/flight-routes/Porto-OPO/Washington-WAS'>Visit our flight page for the latest deals!>/a>

Question 3

Which airports will I be using when flying from Porto to Washington, D.C.?

Accepted Answer

On your way to Washington, D.C., you’ll fly out from Porto. You’ll be landing in one of Washington, D.C.’s 2 airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. <a href='/flight-routes/Porto-OPO/Washington-WAS'>Visit our flight page for the latest deals!>/a>

Question 4

Which aircraft models fly most regularly from Porto to Washington, D.C.?

Accepted Answer

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

Question 5

Which airline alliances offer flights from Porto to Washington, D.C.?

Accepted Answer

Star Alliance is the only airline alliance operating flights between Porto and Washington, D.C..

Question 6

How does KAYAK find such low prices on flights from Porto to Washington, D.C.?

Accepted Answer

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, D.C.. <a href='/flight-routes/Porto-OPO/Washington-WAS'>Visit our flight page for the latest deals!>/a>

Question 7

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Porto to Washington, D.C.?

Accepted Answer

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Porto is likely to change within 7 days, so travelers know whether to wait or book now. <a href='/flight-routes/Porto-OPO/Washington-WAS'>Visit our flight page for the latest deals!>/a>

Question 8

What is the Hacker Fare option on flights from Porto to Washington, D.C.?

Accepted Answer

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, D.C. with an airline and back to Porto with another airline. <a href='/flight-routes/Porto-OPO/Washington-WAS'>Visit our flight page for the latest deals!>/a>

Question 9

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Porto to Washington, D.C.?

Accepted Answer

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, D.C. from Porto up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. <a href='/flight-routes/Porto-OPO/Washington-WAS'>Visit our flight page for the latest deals!>/a>

Question 10

What is the cheapest layover airport when flying from Porto to Washington, D.C.?

Accepted Answer

Flights via Frankfurt am Main (FRA) offer the most affordable fares, with an average round-trip price of $565.

Question 11

What is the most popular layover airport when flying from Porto to Washington, D.C.?

Accepted Answer

Lisbon (LIS) is the top choice – 42% of KAYAK users who clicked on 1-stop flights from Porto to Washington, D.C. picked an itinerary connecting there.

Question 12

Which layover airport has the quickest connection when flying from Porto to Washington, D.C.?

Accepted Answer

If you prefer a quick connection, Madrid (MAD) often has the shortest layovers from Porto to Washington, D.C., with an average of 1h 05m.

Question 13

Which layover airport offers the shortest total travel time from Porto to Washington, D.C.?

Accepted Answer

Consider flying via Madrid (MAD) for the shortest journey. The average one-way travel time for flights connecting there is 11h 45m.

Question 14

Which airlines provide the cheapest flights from Porto to Washington, D.C.?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Porto to Washington, D.C. were found on Lufthansa ($443) and United Airlines ($460).

Question 15

Which airlines provide the cheapest flights from Porto to Washington, D.C.?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Porto to Washington, D.C. were found on Lufthansa ($443) and United Airlines ($460).

Low season	June
High season	April
Cheapest flight	$367

OPO - WAS

$367 Find Cheap Flights from Porto to Washington, D.C.

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

Everything you should know

Cheap Flights from Porto to Washington, D.C. (OPO-WAS)

Recent round-trip flight deals from Porto to Washington, D.C.

Recent one-way flight deals from Porto to Washington, D.C.

Recent last minute flight deals from Porto to Washington, D.C.

KAYAK's insights & trends for Porto to Washington, D.C. flights

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

Which airlines provide the cheapest flights from Porto to Washington, D.C.?

In the past 3 days, the cheapest round-trip tickets from Porto to Washington, D.C. were found on Lufthansa ($443) and United Airlines ($460).

What is the most popular layover airport when flying from Porto to Washington, D.C.?

Lisbon (LIS) is the top choice – 42% of KAYAK users who clicked on 1-stop flights from Porto to Washington, D.C. picked an itinerary connecting there.

What is the cheapest layover airport when flying from Porto to Washington, D.C.?

Flights via Frankfurt am Main (FRA) offer the most affordable fares, with an average round-trip price of $565.

Which layover airport offers the shortest total travel time from Porto to Washington, D.C.?

Consider flying via Madrid (MAD) for the shortest journey. The average one-way travel time for flights connecting there is 11h 45m.

Which layover airport has the quickest connection when flying from Porto to Washington, D.C.?

If you prefer a quick connection, Madrid (MAD) often has the shortest layovers from Porto to Washington, D.C., with an average of 1h 05m.

Good to know

When to book flights from Porto to Washington, D.C.

FAQs for booking flights from Porto to Washington, D.C.

What is the cheapest flight from Porto to Washington, D.C.?

In the last 3 days, the lowest price for a flight from Porto to Washington, D.C. was $367 for a one-way ticket and $443 for a round-trip.

Do I need a passport to fly between Porto and Washington, D.C.?

Yes

Which airports will I be using when flying from Porto to Washington, D.C.?

On your way to Washington, D.C., you’ll fly out from Porto. You’ll be landing in one of Washington, D.C.’s 2 airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl.

Which aircraft models fly most regularly from Porto to Washington, D.C.?

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

Which airline alliances offer flights from Porto to Washington, D.C.?

Star Alliance is the only airline alliance operating flights between Porto and Washington, D.C..

How does KAYAK find such low prices on flights from Porto to Washington, D.C.?

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, D.C..

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Porto to Washington, D.C.?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. 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, D.C.?

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, D.C. with an airline and back to Porto with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Porto to Washington, D.C.?

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, D.C. 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 Washington, D.C.

Information on your arrival and departure airports

Cabin class types available on flights from Porto to Washington, D.C.

Complete your trip to Washington, D.C. with a hotel stay or car rental

Find direct flights to and from Porto and Washington, D.C.

Flights to other popular destinations

Flights from domestic origins to Washington, D.C.

Choose which airport to fly into in Washington, D.C.

Find deals for your return flight