$259+ Cheap flights from Dulles Intl (IAD) to Portugal
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Dulles Intl to Portugal with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Dulles Intl to Portugal
Keep the following information in mind while searching for Dulles Intl to Portugal flight deals. Data was last updated June 12, 2025.
Round-trip from | $509 (Trip.com) |
|---|---|
One-way from | $259 (Cheapflightsfares) |
Popular in | December |
Cheapest in | February |
Average price | $1,218 |
Good round-trip deal | $612 or less |
Good one-way deal | $342 or less |
Find flight deals from Dulles Intl to Portugal
Cheapest flights from Dulles Intl to PortugalExplore the most affordable flight options available from Dulles Intl to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
Explore the most affordable flight options available from Dulles Intl to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
This Iberia deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Trip.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Ovago deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This oojo deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This oojo deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This oojo deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Trip.com deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This CrystalTravel deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Dulles Intl to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Portugal that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.Lisbon
IAD - LIS
IADLIS
Washington, D.C. Dulles Intl
Mon 9/1
5:45 pm-6:05 am
Nonstop7h 20m
Lisbon Humberto Delgado
Mon 9/8
5:30 pm-8:50 pm
Nonstop8h 20m
Washington, D.C.Ponta Delgada
IAD - PDL
IADPDL
Washington, D.C. Dulles Intl
Mon 9/1
5:45 pm-9:45 am
1 stop12h 00m
Ponta Delgada Nordela
Tue 9/9
6:30 am-3:20 pm
1 stop12h 50m
Washington, D.C.Funchal
IAD - FNC
IADFNC
Washington, D.C. Dulles Intl
Wed 9/10
5:50 pm-11:30 am
1 stop12h 40m
Funchal Madeira
Wed 9/17
2:25 pm-8:50 pm
1 stop11h 25m
Washington, D.C.Lisbon
IAD - LIS
IADLIS
Washington, D.C. Dulles Intl
Wed 9/10
9:45 am-6:40 pm
3 stops27h 55m
Lisbon Humberto Delgado
Thu 9/18
7:05 pm-3:50 pm
2 stops25h 45m
Washington, D.C.Faro
IAD - FAO
IADFAO
Washington, D.C. Dulles Intl
Tue 10/14
5:00 pm-11:50 pm
1 stop25h 50m
Faro
Sun 10/19
6:10 pm-3:20 pm
1 stop26h 10m
Washington, D.C.Lisbon
IAD - LIS
IADLIS
Washington, D.C. Dulles Intl
Sat 8/16
11:15 pm-9:20 pm
1 stop17h 05m
Lisbon Humberto Delgado
Sun 8/24
10:20 pm-10:10 pm
1 stop28h 50m
Washington, D.C.Lisbon
IAD - LIS
IADLIS
Washington, D.C. Dulles Intl
Mon 9/1
1:30 pm-3:15 pm
1 stop20h 45m
Lisbon Humberto Delgado
Thu 9/11
5:55 am-7:45 pm
1 stop18h 50m
Washington, D.C.Faro
IAD - FAO
IADFAO
Washington, D.C. Dulles Intl
Wed 11/26
8:30 pm-11:10 am
2 stops57h 40m
Faro
Sun 11/30
10:30 am-5:15 pm
2 stops35h 45m
Washington, D.C.Funchal
IAD - FNC
IADFNC
Washington, D.C. Dulles Intl
Fri 10/10
10:05 pm-6:40 pm
1 stop15h 35m
Funchal Madeira
Sat 10/18
5:40 pm-7:59 pm
2 stops31h 19m
Washington, D.C.Porto
IAD - OPO
IADOPO
Washington, D.C. Dulles Intl
Mon 9/22
10:40 pm-7:35 am
2 stops27h 55m
Porto
Mon 9/29
4:35 pm-3:00 pm
1 stop27h 25m
Best time to book a flight from Dulles Intl to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from Dulles Intl with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Portugal
What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Portugal?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Portugal (average of $612). Flying from Washington, D.C. Dulles Intl Airport to Portugal in June is currently the most expensive (average of $1,136). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from IAD to PT?
Find hourly flight availability from Dulles Intl to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.
One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Portugal is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 7% on airfare.
What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Portugal?
Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Portugal. Price data was last updated on September 29, 2024.
Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Portugal flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Rainfall in Portugal by month
Plan your trip to Portugal by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.
Temperature in Portugal by month
Plan your trip to Portugal by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Portugal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).
Reviews of airlines servicing Portugal
Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated June 12, 2025.
Read reviews from past customers who have flown Delta, Porter Airlines and KLM from Washington, D.C. to Portugal. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Related info for your journey
Find useful and relevant information for your journey from Dulles Intl to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Dulles Intl to Portugal
See prices for flight routes from nearby airports that may be better suited for you.
Top 10 airlines flying from Dulles Intl to Portugal
Discover the top 10 airlines that operate flights from Dulles Intl to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$332 | Average$384 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$418 | Average$842 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$422 | Average$617 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$430 | Average$662 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$459 | Average$875 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$508 | Average$694 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$510 | Average$693 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$515 | Average$742 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$543 | Average$978 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$552 | Average$644 | FlexibilityNo cancel fee | On-time75% |