Porto

$259+ Cheap flights from Washington, D.C. (WAS) to Porto (OPO)

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.
WAS — OPO
jun. 17 — jun. 241
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Cheapflights Tip: The best prices from Washington, D.C. to Porto are usually found in November or October, booked 74 days in advance, depart on a Sunday or Monday and return on a Thursday

Cheap flight deals from Washington, D.C. to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated junio 12, 2025.

Round-trip from

$650
(United Airlines)

One-way from

$259
(Cheapflightsfares)

Popular in

June

Cheapest in

November

Average price

$879
From Washington, D.C. (WAS) to Porto
One-way flight from Washington, D.C. (WAS) to Porto
Highest demand for flights based on searches. 20% potential increase in price ($175 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
Average for round-trip flights in June 2025

Find flight deals from Washington, D.C. to Porto

Cheapest flights from Washington, D.C. to Porto
Explore the most affordable flight options available from Washington, D.C. to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/1910:56 amBWI - OPO
2 stops19h 44mUnited Airlines
mié. 11/266:00 amOPO - BWI
2 stops32h 59mUnited Airlines
Deal found 6/10$515
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/28:30 pmBWI - OPO
2 stops30h 10mBritish Airways
vie. 11/78:40 pmOPO - BWI
2 stops51h 05mBritish Airways
Deal found 6/12$578
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/145:30 pmBWI - OPO
2 stops17h 00mDelta
jue. 10/2311:35 amOPO - BWI
2 stops17h 37mDelta
Deal found 6/11$625
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/296:50 pmBWI - OPO
1 stop20h 15mPLAY
jue. 9/119:20 pmOPO - BWI
1 stop25h 20mPLAY
Deal found 6/10$652
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/2210:40 pmIAD - OPO
2 stops27h 55mIberia
lun. 9/294:35 pmOPO - IAD
1 stop27h 25mIberia
Deal found 6/12$667
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 7/148:50 amIAD - OPO
2 stops19h 45mUnited Airlines
mar. 7/2212:50 pmOPO - IAD
2 stops23h 37mUnited Airlines
Deal found 6/11$668
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/158:40 pmDCA - OPO
2 stops31h 40mAir Canada
mar. 7/2212:50 pmOPO - DCA
2 stops25h 07mAir Canada
Deal found 6/11$668
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/266:30 amDCA - OPO
2 stops24h 10mUnited Airlines
dom. 11/3012:40 pmOPO - DCA
2 stops34h 27mUnited Airlines
Deal found 6/9$671
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/155:25 pmIAD - OPO
1 stop35h 10mMultiple Airlines
mar. 7/228:40 amOPO - IAD
1 stop12h 35mMultiple Airlines
Deal found 6/11$672
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/238:45 pmIAD - OPO
1 stop30h 10mSWISS
lun. 6/307:20 pmOPO - IAD
1 stop25h 55mSWISS
Deal found 6/11$673
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/163:35 pmDCA - OPO
2 stops35h 00mIberia
mié. 9/248:15 amOPO - DCA
2 stops19h 52mIberia
Deal found 6/12$673
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/285:50 pmIAD - OPO
1 stop11h 10mTAP AIR PORTUGAL
jue. 9/49:00 amOPO - IAD
1 stop11h 20mTAP AIR PORTUGAL
Deal found 6/9$678

Cheapflights Fare Finder

Customize your flight search to find flights from Washington, D.C. to Porto 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 junio 12, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Porto that are best for you.

Fly from

Washington, D.C.

Fly to

Porto

Route

Depart

Return

Price

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

mié. 11/19

10:56 am-11:40 am

2 stops19h 44m

Porto

mié. 11/26

6:00 am-9:59 am

2 stops32h 59m

$515

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

dom. 11/2

8:30 pm-7:40 am

2 stops30h 10m

Porto

vie. 11/7

8:40 pm-6:45 pm

2 stops51h 05m

$578

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

mar. 10/14

5:30 pm-3:30 pm

2 stops17h 00m

Porto

jue. 10/23

11:35 am-12:12 am

2 stops17h 37m

$625

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

vie. 8/29

6:50 pm-8:05 pm

1 stop20h 15m

Porto

jue. 9/11

9:20 pm-5:40 pm

1 stop25h 20m

$652

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

lun. 9/22

10:40 pm-7:35 am

2 stops27h 55m

Porto

lun. 9/29

4:35 pm-3:00 pm

1 stop27h 25m

$667

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mar. 7/15

8:40 pm-9:20 am

2 stops31h 40m

Porto

mar. 7/22

12:50 pm-8:57 am

2 stops25h 07m

$668

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

lun. 7/14

8:50 am-9:35 am

2 stops19h 45m

Porto

mar. 7/22

12:50 pm-7:27 am

2 stops23h 37m

$668

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mié. 11/26

6:30 am-11:40 am

2 stops24h 10m

Porto

dom. 11/30

12:40 pm-6:07 pm

2 stops34h 27m

$671

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 7/15

5:25 pm-9:35 am

1 stop35h 10m

Porto

mar. 7/22

8:40 am-4:15 pm

1 stop12h 35m

$672

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

lun. 6/23

8:45 pm-7:55 am

1 stop30h 10m

Porto

lun. 6/30

7:20 pm-4:15 pm

1 stop25h 55m

$673

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 59 results
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Best time to book a flight from Washington, D.C. to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Washington, D.C. 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 Washington, D.C. to Porto

How far ahead should I book a flight from Washington, D.C. to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Porto. Price data was last updated on June 9, 2025.

The best time to book flights from Washington, D.C. to Porto is 74 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Porto (average of $523). Flying from Washington, D.C. to Porto in June is currently the most expensive (average of $1,047). 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 WAS to OPO?

Find hourly flight availability from Washington, D.C. to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 12, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 17% on flights from Washington, D.C. to Porto by exploring options for tickets in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Porto. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. to Porto flight should consider departing on Tuesday at noon when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto, 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 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated junio 12, 2025.
Read through reviews of airlines operating flights from Washington, D.C. to Porto, such as Delta, Porter Airlines and KLM. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good
8.0
Very good

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Porto from Washington, D.C.?

    Most people fly into Porto (OPO) if they book a flight to Porto from Washington, D.C.. On average, Porto has 0 inbound flights from Washington, D.C. per day from 9 airlines. Porto is conveniently located just 6.8 mi from Porto’s city center.

  • What are the cheapest airlines flying from Washington, D.C. to Porto round-trip?

    Cheapflights users have booked flights from Washington, D.C. to Porto round-trip from $650. Other airlines that can offer you cheap pricing are PLAY, from $652, and Iberia, from $667. United Airlines is priced at 4% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Washington, D.C. to Porto one-way?

    To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at $259. PLAY flights start at $327 while deals on Scandinavian Airlines start at $430 one-way.

  • What are the most popular routes from Washington, D.C. to Porto?

  • Where are the most common layover locations when flying from Washington, D.C. to Porto?

  • What are some popular things to do or see while on a layover in Lisbon?

    Chiado, Praça do Marquês de Pombal, and Londres are the most popular attractions in Lisbon if you're in need of something to do during your layover. Chiado, Praça do Marquês de Pombal, and Londres can be accessed by traveling approximately 4.5 mi, 3.6 mi, and 2.3 mi, respectively from Lisbon Humberto Delgado. Those on a layover in Lisbon in need of a rental car can book one at Lisbon Humberto Delgado for about $21.

  • What are some popular points of interest to see during a layover in Paris?

    Most Paris visitors opt to spend their time at Eiffel Tower, Champs-Elysées, and Louvre Museum. Those on a layover in Paris interested in visiting Eiffel Tower, Champs-Elysées, or Louvre Museum can do so by traveling 15.8 mi, 14.7 mi, and 14.3 mi, respectively from Paris Charles de Gaulle. Those landing in Paris looking to spend some time exploring during their layover can rent a car for about $39 per day.

  • Where are the least popular layover locations for Washington, D.C. to Porto flights?

  • Can I find deals for flights from Washington, D.C. to Porto that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Porto.

  • Can I find deals for business class flights from Washington, D.C. to Porto?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Porto 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 Washington, D.C. to Porto?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Porto (average of $523). Flying from Washington, D.C. to Porto in June is currently the most expensive (average of $1,047). 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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Top 9 airlines flying from Washington, D.C. to Porto

Discover the top 9 airlines that operate flights from Washington, D.C. to Porto. 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$418Average$768FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$422Average$422FlexibilityNo cancel feeOn-time77%
KLMCheapest$430Average$684FlexibilityNo cancel feeOn-time75%
TAP AIR PORTUGALCheapest$459Average$734FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$515Average$736FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$520Average$818FlexibilityNo cancel feeOn-time69%
SWISSCheapest$554Average$666FlexibilityNo cancel feeOn-time79%
American AirlinesCheapest$573Average$736FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$603Average$696FlexibilityNo cancel feeOn-time76%

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