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Portugal

$265+ Cheap flights from District of Columbia 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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LIS
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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Cheap flight deals from District of Columbia to Portugal

Cheapest flights from District of Columbia to Portugal
Explore the most affordable flight options available from District of Columbia to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

This FlightHub deal was found by Cheapflights users on 12/14. 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.
Tue 12/308:54 pmDCA - LIS
2 stops42h 26mMultiple Airlines
Thu 1/89:20 pmLIS - DCA
2 stops29h 25mMultiple Airlines
Deal found 12/14$774
This CrystalTravel deal was found by Cheapflights users on 12/14. 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.
Mon 12/158:30 pmIAD - OPO
1 stop16h 55mSWISS
Mon 12/227:20 pmOPO - IAD
1 stop25h 10mSWISS
Deal found 12/14$830
This Mytrip deal was found by Cheapflights users on 12/14. 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.
Mon 12/156:00 pmIAD - LIS
2 stops14h 30mMultiple Airlines
Mon 12/227:10 pmLIS - IAD
2 stops26h 30mMultiple Airlines
Deal found 12/14$839
This oojo deal was found by Cheapflights users on 12/16. 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.
Wed 12/3110:30 pmIAD - LIS
Nonstop7h 05mTAP AIR PORTUGAL
Sat 1/106:00 pmLIS - IAD
2 stops42h 20mTAP AIR PORTUGAL
Deal found 12/16$843
This Turkish Airlines deal was found by Cheapflights users on 12/14. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/261:30 pmIAD - LIS
1 stop20h 35mTurkish Airlines
Tue 1/64:05 pmLIS - IAD
1 stop32h 15mTurkish Airlines
Deal found 12/14$856
This WAYA deal was found by Cheapflights users on 12/15. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:00 pmIAD - LIS
1 stop11h 15mMultiple Airlines
Tue 12/237:40 amLIS - IAD
1 stop13h 50mMultiple Airlines
Deal found 12/15$889
This Delta deal was found by Cheapflights users on 12/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/234:55 pmIAD - OPO
2 stops36h 35mDelta
Thu 1/811:20 amOPO - IAD
1 stop34h 15mDelta
Deal found 12/14$892
This Trip.com deal was found by Cheapflights users on 12/15. 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.
Tue 12/168:30 pmIAD - OPO
1 stop30h 20mMultiple Airlines
Tue 12/236:00 amOPO - IAD
1 stop14h 50mMultiple Airlines
Deal found 12/15$903
This Expedia deal was found by Cheapflights users on 12/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:10 pmIAD - OPO
2 stops32h 40mSWISS
Tue 12/237:15 pmOPO - IAD
2 stops24h 20mSWISS
Deal found 12/15$927
This British Airways deal was found by Cheapflights users on 12/14. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:20 pmIAD - OPO
1 stop17h 55mBritish Airways
Wed 1/76:35 pmOPO - IAD
1 stop30h 20mBritish Airways
Deal found 12/14$946
This oojo deal was found by Cheapflights users on 12/14. 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.
Tue 12/305:30 pmIAD - LIS
Nonstop7h 05mTAP AIR PORTUGAL
Thu 1/89:00 pmLIS - IAD
2 stops39h 20mTAP AIR PORTUGAL
Deal found 12/14$978
This Delta deal was found by Cheapflights users on 12/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:05 pmIAD - OPO
1 stop23h 20mDelta
Thu 1/811:20 amOPO - IAD
1 stop34h 15mDelta
Deal found 12/14$982

Find flight deals from District of Columbia to Portugal

Keep the following information in mind while searching for District of Columbia to Portugal flight deals. Data was last updated December 16, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$436
(Kiwi.com)

One-way from

$265
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,391

Good round-trip deal

$547 or less

Good one-way deal

$323 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Lisbon Humberto Delgado flights.
Search Deals
From District of Columbia to Portugal
Search Deals
One-way flight from District of Columbia to Portugal
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from District of Columbia to Portugal.
Search Deals
Price to beat on a one-way flight from District of Columbia to Portugal.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from District of Columbia 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 December 16, 2025.
Use the filters below to find and compare flights from District of Columbia to Portugal that are best for you.

Fly from

District of Columbia

Fly to

Portugal

Route

Depart

Return

Price

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 1/12

10:15 pm-11:15 am

2 stops32h 00m

Porto

Mon 1/19

12:05 pm-4:40 pm

1 stop33h 35m

$442

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 1/14

5:45 pm-12:05 pm

1 stop13h 20m

Porto

Wed 1/21

12:10 pm-4:40 pm

1 stop33h 30m

$458

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 2/24

5:45 pm-12:05 pm

1 stop13h 20m

Porto

Tue 3/3

12:05 pm-3:05 pm

1 stop32h 00m

$464

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 2/18

5:40 pm-1:15 pm

1 stop14h 35m

Porto

Tue 2/24

7:25 pm-3:05 pm

1 stop24h 40m

$477

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 2/17

6:50 pm-10:30 am

1 stop10h 40m

Porto

Fri 2/27

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 2/18

6:50 pm-10:30 am

1 stop10h 40m

Porto

Fri 2/27

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 2/15

6:50 pm-10:30 am

1 stop10h 40m

Porto

Tue 2/24

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 2/16

6:50 pm-10:30 am

1 stop10h 40m

Porto

Fri 2/27

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 2/16

6:50 pm-10:30 am

1 stop10h 40m

Porto

Thu 2/26

5:00 am-4:05 pm

1 stop16h 05m

$478

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 2/16

6:50 pm-10:30 am

1 stop10h 40m

Porto

Tue 2/24

11:15 am-4:05 pm

1 stop33h 50m

$478

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 60 results
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Best time to book a flight from District of Columbia to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from District of Columbia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from District of Columbia to Portugal

What is the cheapest month to book a flight from District of Columbia to Portugal?

Currently, July is the cheapest month in which you can book a flight from District of Columbia to Portugal (average of $345). Flying from District of Columbia 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 DC to PT?

Find hourly flight availability from District of Columbia 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 December 16, 2025.

When flying from District of Columbia to Portugal, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 19% versus a flight in the evening.

What is the cheapest day to fly from District of Columbia to Portugal?

Use this chart to determine the cheapest time to fly round-trip from District of Columbia to Portugal. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their District of Columbia to Portugal flight should consider departing on Sunday afternoons when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from District of Columbia to Portugal

Explore weekly flight availability from District of Columbia to Portugal. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 16, 2025.

The most flights from USDC to PT0 are scheduled on a Monday (5 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (3 on average).

Related info for your journey

Find useful and relevant information for your journey from District of Columbia to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from District of Columbia to Portugal?

    Airlines like SWISS, Delta, and TAP AIR PORTUGAL fly from District of Columbia to Portugal in about 10h 40m. The time it takes to get you to your destination can typically vary by up to 21h 20m. There are 3537 mi between District of Columbia and Portugal. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from District of Columbia to Portugal one-way?

    One-way options have recently been found by users for as low as $222 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include United Airlines from $260 and Royal Air Maroc from $330 one-way.

  • Can I find deals for flights from District of Columbia to Portugal that include hotel bookings?

    Yes. In addition to deals on District of Columbia to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from District of Columbia to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from District of Columbia to Portugal.

  • Can I find deals for business class flights from District of Columbia to Portugal?

    Yes. Cheapflights offers flight deals from District of Columbia to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from District of Columbia to Portugal?

    Currently, July is the cheapest month in which you can book a flight from District of Columbia to Portugal (average of $345). Flying from District of Columbia 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.

See more FAQs

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Alternative routes for District of Columbia to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from District of Columbia to Portugal

Discover the top 10 airlines that operate flights from District of Columbia 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 December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$345Average$399FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$439Average$872FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$444Average$681FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$493Average$1,070FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$504Average$599FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$504Average$920FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$508Average$1,022FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$510Average$874FlexibilityNo cancel feeOn-time70%
IberiaCheapest$515Average$721FlexibilityNo cancel feeOn-time77%
Royal Air MarocCheapest$551Average$669FlexibilityNo cancel feeOn-time75%

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