$248+ 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 3/16. 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
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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
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 enero 29, 2026.
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 enero 29, 2026.
This oojo deal was found by Cheapflights users on 1/28. 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 1/27. 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 1/28. 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 Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com 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 1/26. 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 1/27. 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 1/27. 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 1/27. 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 1/26. 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 1/26. 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.
Find 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 enero 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $372 (oojo) |
One-way from | $248 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $730 |
Good round-trip deal | $541 or less |
Good one-way deal | $390 or less |
Cheapflights Fare Finder
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.Funchal
IAD - FNC
IADFNC
Washington, D.C. Dulles Intl
jue. 4/23
10:35 pm-6:30 pm
1 stop14h 55m
Funchal Madeira
mar. 4/28
5:50 am-3:05 pm
1 stop14h 15m
Washington, D.C.Ponta Delgada
IAD - PDL
IADPDL
Washington, D.C. Dulles Intl
lun. 4/13
10:35 pm-2:35 pm
1 stop12h 00m
Ponta Delgada Nordela
lun. 4/20
6:30 am-8:35 pm
1 stop18h 05m
Washington, D.C.Ponta Delgada
IAD - PDL
IADPDL
Washington, D.C. Dulles Intl
jue. 4/23
10:35 pm-6:50 pm
1 stop16h 15m
Ponta Delgada Nordela
jue. 4/30
7:40 pm-3:05 pm
1 stop23h 25m
Washington, D.C.Ponta Delgada
IAD - PDL
IADPDL
Washington, D.C. Dulles Intl
mar. 3/3
5:30 pm-8:20 am
1 stop10h 50m
Ponta Delgada Nordela
mié. 3/11
6:35 am-10:00 pm
1 stop18h 25m
Washington, D.C.Ponta Delgada
IAD - PDL
IADPDL
Washington, D.C. Dulles Intl
lun. 3/9
6:30 pm-6:35 pm
1 stop21h 05m
Ponta Delgada Nordela
lun. 3/16
7:50 pm-3:35 pm
1 stop22h 45m
Washington, D.C.Funchal
IAD - FNC
IADFNC
Washington, D.C. Dulles Intl
lun. 3/2
5:30 pm-5:15 pm
1 stop18h 45m
Funchal Madeira
lun. 3/9
4:10 am-4:15 pm
1 stop16h 05m
Washington, D.C.Funchal
IAD - FNC
IADFNC
Washington, D.C. Dulles Intl
lun. 4/27
10:35 pm-9:00 pm
1 stop17h 25m
Funchal Madeira
mié. 5/6
5:50 am-3:05 pm
1 stop14h 15m
Washington, D.C.Faro
IAD - FAO
IADFAO
Washington, D.C. Dulles Intl
mar. 3/17
12:14 pm-9:30 am
2 stops17h 16m
Faro
mié. 3/25
10:20 am-5:05 pm
1 stop34h 45m
Washington, D.C.Faro
IAD - FAO
IADFAO
Washington, D.C. Dulles Intl
lun. 4/6
8:20 pm-9:35 am
2 stops32h 15m
Faro
sáb. 4/11
6:45 pm-4:50 pm
1 stop27h 05m
Washington, D.C.Lisbon
IAD - LIS
IADLIS
Washington, D.C. Dulles Intl
lun. 4/20
10:25 pm-11:10 pm
1 stop19h 45m
Lisbon Humberto Delgado
jue. 4/30
7:20 am-3:50 pm
1 stop13h 30m
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, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Portugal (average of $345). Flying from Washington, D.C. Dulles Intl Airport to Portugal in September is currently the most expensive (average of $529). 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 enero 29, 2026.
When flying from Washington, D.C. Dulles Intl Airport to Portugal, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How often are flights from Washington, D.C. to Portugal delayed?
About 28% of weekly flights between Washington, D.C. and Portugal have experienced delays in the past year, with the average delay time being 144 minutes.
What is the most punctual flight time for Washington, D.C. to Portugal flights?
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Washington, D.C. to Portugal flights?
Over the last year, TAP AIR PORTUGAL have had the lowest number of delays on this route, with just 26% of flights being delayed.
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 enero 29, 2026.
See what other customers who have flown with United Airlines, Aer Lingus, and TAP AIR PORTUGAL from Washington, D.C. Dulles Intl Airport to Portugal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
Crew
Boarding
Overall
Entertainment
Food
Reviews
Dane,Jan 2026
TYS - IAD
Comfort
Crew
Boarding
Overall
Entertainment
Food
Reviews
Dane,Jan 2026
TYS - IAD
Comfort
Crew
Boarding
Overall
Entertainment
Food
Reviews
Dane,Jan 2026
TYS - IAD
Comfort
Crew
Boarding
Overall
Entertainment
Food
Reviews
Dane,Jan 2026
TYS - IAD
Comfort
Crew
Boarding
Overall
Entertainment
Food
Reviews
Dane,Jan 2026
TYS - IAD
Comfort
Crew
Boarding
Overall
Entertainment
Food
Reviews
Dane,Jan 2026
TYS - IAD
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 enero 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$439 | Average$815 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$443 | Average$886 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$444 | Average$681 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$477 | Average$731 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$480 | Average$680 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$481 | Average$599 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$494 | Average$994 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$508 | Average$646 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$514 | Average$951 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$515 | Average$735 | FlexibilityNo cancel fee | On-time77% |