Cheap flights from Washington, D.C. Dulles Intl Airport to Portugal from $257
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Portugal departing on 8/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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JetBlue flights from Washington, D.C. Dulles Intl Airport to Portugal
Our best JetBlue deals on Washington, D.C. Dulles Intl Airport to Portugal flight tickets
TAP AIR PORTUGAL flights from Washington, D.C. Dulles Intl Airport to Portugal
Our best TAP AIR PORTUGAL deals on Washington, D.C. Dulles Intl Airport to Portugal flight tickets
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How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Portugal
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Portugal?
The cheapest month to fly to Portugal from Washington, D.C. Dulles Intl Airport is in February. Flight prices, which tend to average around $667, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Portugal from Washington, D.C. Dulles Intl Airport during November instead. Flights to Portugal in November, while not as cheap as those in February, still average around $714.
What is the cheapest day to depart on your flight to Portugal?
According to our data, Monday is the cheapest day to fly to Portugal from Washington, D.C. Dulles Intl Airport. The lowest ticket price found for a Monday departure recently was $756. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Friday, with ticket prices averaging around $920.
What is the cheapest time of day to depart on your flight to Portugal?
Our most recent data shows that the best time of day to fly to Portugal is at noon. Flights from Washington, D.C. Dulles Intl Airport to Portugal during this time can be as low as $661. In the evening is when there is more demand to fly to Portugal, so prices are often more expensive at around $849 per ticket.
What is the cheapest Washington, D.C. Dulles Intl to Portugal flight route?
Fly from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado for the best Washington, D.C. Dulles Intl - Portugal flight prices
How far in advance should I book a flight to Portugal?
You are more likely to see cheaper flights to Portugal from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $901 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Washington, D.C. Dulles Intl Airport for as low as $770 on momondo.
What cabin class options are available on Washington, D.C. Dulles Intl to Portugal flights?
There are 3 cabin classes available to choose from on Washington, D.C. Dulles Intl to Portugal flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Portugal?
TAP AIR PORTUGAL, Air Canada, and United Airlines are the most popular carriers operating from Washington, D.C. Dulles Intl to Portugal
What airlines fly to Portugal?
TAP AIR PORTUGAL, United Airlines and Royal Air Maroc are the top three most popular airlines that fly to Portugal from Washington, D.C. Dulles Intl Airport according to our data. TAP AIR PORTUGAL is the first choice among our users, with 78% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 15 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.
How many flights depart from Washington, D.C. Dulles Intl Airport to Portugal on average per day?
The number of flights available between Washington, D.C. Dulles Intl Airport and Portugal is 6 per day as of June 2025. The most frequent departure time is 10:00PM, with 74% of daily flights leaving in the evening.
How many flights depart from Washington, D.C. Dulles Intl Airport to Portugal on average per week?
As of June 2025, 45 flights take off from Washington, D.C. Dulles Intl Airport and land in Portugal each week. The most common flight departure day for this route is Mon, with 16% of weekly flights taking off on this day.
Cheap Washington, D.C. Dulles Intl Airport to Portugal flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Portugal
When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Portugal?
Prices for flights from Washington, D.C. Dulles Intl Airport to Portugal are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Portugal?
As of June 2025, there are 15 operators available to choose from for flights from Washington, D.C. Dulles Intl Airport to Portugal.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Portugal?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to Portugal.
What documentation or ID do you need to fly to Portugal?
The travel and health documents required for your trip to Portugal can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portugal. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Washington, D.C. Dulles Intl Airport to Portugal?
momondo data reveals that the most frequently booked plane model on the route from Washington, D.C. Dulles Intl Airport to Portugal is Boeing 767-400, representing 44.09% of all bookings. The subsequent popular models are Airbus A321neo at 30.95%, Boeing 767-300 at 10.93%, and Boeing 777 at 3.71%.
Best airlines flying from Washington, D.C. Dulles Intl Airport to Portugal
Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Portugal with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $332 | Free Cancellation | Rating 7.0 102 reviews | |||
| PriceFrom $418 | Free Cancellation | Rating 8.0 7,965 reviews | |||
| PriceFrom $430 | Free Cancellation | Rating 7.8 1,365 reviews | |||
| PriceFrom $460 | Free Cancellation | Rating 7.1 1,900 reviews | |||
| PriceFrom $508 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $510 | Free Cancellation | Rating 6.6 7,056 reviews | |||
| PriceFrom $515 | Free Cancellation | Rating 7.0 2,796 reviews | |||
| PriceFrom $543 | Free Cancellation | Rating 7.4 8,831 reviews | |||
| PriceFrom $552 | Free Cancellation | Rating 6.1 477 reviews | |||
| PriceFrom $554 | Free Cancellation | Rating 7.5 1,645 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Washington, D.C. to Portugal?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Portugal from Washington, D.C..
Can I find flights from Washington, D.C. to Portugal with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Washington, D.C. to Portugal flights to just show those with flexible booking policies.
How can momondo help me find flights from Washington, D.C. to Portugal?
Once you have performed a search for Washington, D.C. to Portugal flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Washington, D.C. to Portugal right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Washington, D.C. to Portugal flights. All you need is a valid email address and we will do the rest; it is that quick and easy.