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

$445 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from $549 and $549, respectively.

What are the most popular airlines that fly from District of Columbia to Porto?

Consider American Airlines, Air France or Delta when booking your flight. These represent the most popular airlines when flying from District of Columbia to Porto.

How far in advance should I book a flight from District of Columbia to Porto?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 28 days in advance, which can save you up to 62% on flights from District of Columbia to Porto compared to booking the week you need them. Waiting 28 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $625. For sooner than that we have options available in the next 3 days from $825.

What is the cheapest month to fly from District of Columbia to Porto?

Our data shows that November tends to be the cheapest month to fly to Porto from District of Columbia. Users have commonly found prices around $673 for the month, but tickets can be as low as $418. Due to multiple factors, prepare for potentially higher prices in June.

What airport do you fly into for flights to Porto from District of Columbia?

Porto (OPO) is the airport you will fly into if you book a flight from District of Columbia to Porto. It is only a 6.8 mi journey from Porto (OPO) to Porto’s city center.

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

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

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

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 Porto.

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

Yes. Cheapflights offers flight deals from District of Columbia 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.

$255+ Flights from District of Columbia to Porto

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Cheap flight deals from District of Columbia to Porto

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$673 (Gotogate)
One-way from	$374 (Kiwi.com)
Popular in	June
Cheapest in	November
Average price	$708

Provider with most accurate pricing for Washington, D.C. (WAS)-Porto flight deals.

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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Porto flights.

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From District of Columbia to Porto

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One-way flight from District of Columbia to Porto

Search Deals

Highest demand for flights based on searches. 21% potential increase in price ($179 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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Find flight deals from District of Columbia to Porto

Cheapest flights from District of Columbia to Porto
Explore the most affordable flight options available from District of Columbia to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

Tue 9/95:00 pmIAD - OPO

1 stop10h 00mTAP AIR PORTUGAL

Wed 9/179:00 amOPO - IAD

1 stop11h 20mTAP AIR PORTUGAL

Deal found 4/22

$676

Wed 9/174:35 pmDCA - OPO

1 stop11h 45mAir Canada

Thu 10/96:00 amOPO - DCA

2 stops20h 51mAir Canada

Deal found 4/23

$684

Sun 5/410:20 pmIAD - OPO

1 stop12h 00mMultiple Airlines

Wed 5/215:35 pmOPO - IAD

2 stops26h 45mMultiple Airlines

Deal found 4/23

$690

Wed 9/2412:35 pmIAD - OPO

2 stops15h 45mAir Canada

Tue 10/76:00 amOPO - IAD

2 stops20h 25mAir Canada

Deal found 4/23

$691

Mon 6/233:40 pmIAD - OPO

1 stop10h 15mUnited Airlines

Tue 7/112:50 pmOPO - IAD

2 stops28h 03mUnited Airlines

Deal found 4/23

$700

Tue 9/95:15 pmDCA - OPO

1 stop9h 30mUnited Airlines

Tue 9/1612:50 pmOPO - DCA

1 stop14h 01mUnited Airlines

Deal found 4/22

$703

Wed 5/78:45 pmIAD - OPO

1 stop16h 45mSWISS

Tue 5/208:40 amOPO - IAD

1 stop12h 35mSWISS

Deal found 4/23

$712

Wed 10/112:30 pmDCA - OPO

2 stops14h 05mAmerican Airlines

Wed 10/88:15 amOPO - DCA

2 stops16h 00mAmerican Airlines

Deal found 4/23

$718

Wed 5/712:25 pmIAD - OPO

2 stops22h 05mDelta

Wed 5/2111:25 amOPO - IAD

1 stop33h 10mDelta

Deal found 4/23

$720

Thu 9/119:40 pmIAD - OPO

1 stop37h 10mTurkish Airlines

Wed 9/1710:50 amOPO - IAD

1 stop37h 55mTurkish Airlines

Deal found 4/22

$728

Tue 9/91:30 pmDCA - OPO

2 stops21h 00mDelta

Wed 9/176:15 amOPO - DCA

2 stops17h 56mDelta

Deal found 4/22

$740

Tue 7/17:55 pmDCA - OPO

2 stops14h 40mKLM

Wed 7/96:15 amOPO - DCA

2 stops15h 14mKLM

Deal found 4/23

$746

Best flights from District of Columbia to Porto
Discover carefully curated flight deals from District of Columbia to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2025.

Tue 5/68:45 pmIAD - OPO

1 stop30h 00mMultiple Airlines

Tue 5/136:00 amOPO - IAD

2 stops20h 08mMultiple Airlines

Deal found 4/22

$673

Tue 5/610:20 pmIAD - OPO

1 stop13h 40mTAP AIR PORTUGAL

Fri 5/1610:00 amOPO - IAD

1 stop11h 20mTAP AIR PORTUGAL

Deal found 4/23

$679

Tue 7/85:25 pmIAD - OPO

1 stop11h 20mUnited Airlines

Tue 7/2212:50 pmOPO - IAD

2 stops28h 03mUnited Airlines

Deal found 4/22

$690

Wed 6/118:18 amIAD - OPO

2 stops20h 02mAir Canada

Thu 7/312:10 pmOPO - IAD

2 stops33h 00mAir Canada

Deal found 4/22

$696

Wed 5/78:45 pmIAD - OPO

1 stop16h 45mSWISS

Tue 5/208:40 amOPO - IAD

1 stop12h 35mSWISS

Deal found 4/23

$712

Wed 5/712:25 pmIAD - OPO

2 stops22h 05mDelta

Tue 5/2011:25 amOPO - IAD

1 stop33h 10mDelta

Deal found 4/23

$720

Mon 7/76:30 pmIAD - OPO

1 stop16h 00mKLM

Tue 7/154:20 pmOPO - IAD

1 stop28h 15mKLM

Deal found 4/22

$726

Sun 6/2210:20 pmIAD - OPO

1 stop17h 40mLufthansa

Wed 7/166:15 amOPO - IAD

2 stops14h 35mLufthansa

Deal found 4/23

$763

Wed 7/28:33 pmIAD - OPO

2 stops13h 57mAir France

Sat 7/129:20 amOPO - IAD

1 stop14h 55mAir France

Deal found 4/22

$806

Thu 6/124:40 pmDCA - OPO

2 stops22h 40mBritish Airways

Thu 7/39:55 amOPO - DCA

2 stops18h 12mBritish Airways

Deal found 4/22

$845

Thu 6/55:00 pmDCA - OPO

2 stops13h 40mAmerican Airlines

Thu 6/1212:20 pmOPO - DCA

2 stops15h 47mAmerican Airlines

Deal found 4/22

$908

Wed 5/712:35 pmDCA - OPO

2 stops26h 20mIberia

Fri 5/168:15 amOPO - DCA

2 stops19h 21mIberia

Deal found 4/23

$1,039

Last-minute flights from District of Columbia to Porto
Discover last-minute flight deals from District of Columbia to Porto. Data last updated April 24, 2025 and is based on user searches.

Mon 4/2811:39 amDCA - OPO

2 stops16h 21mTAP AIR PORTUGAL

Mon 5/56:05 pmOPO - DCA

1 stop30h 36mTAP AIR PORTUGAL

Deal found 4/23

$1,503

Tue 4/2910:20 pmIAD - OPO

1 stop20h 00mLufthansa

Fri 5/1611:05 amOPO - IAD

1 stop13h 20mLufthansa

Deal found 4/23

$864

Tue 4/295:23 pmIAD - OPO

2 stops17h 07mDelta

Fri 5/166:40 amOPO - IAD

1 stop13h 55mDelta

Deal found 4/23

$869

Wed 4/308:45 pmIAD - OPO

1 stop33h 40mSWISS

Fri 5/98:40 amOPO - IAD

1 stop12h 35mSWISS

Deal found 4/23

$862

Wed 4/3012:10 pmDCA - OPO

2 stops22h 20mDelta

Wed 5/76:20 amOPO - DCA

2 stops16h 47mDelta

Deal found 4/23

$880

Wed 4/3012:47 pmIAD - OPO

2 stops17h 33mUnited Airlines

Fri 5/96:00 amOPO - IAD

2 stops22h 59mUnited Airlines

Deal found 4/23

$889

Wed 4/3012:30 pmDCA - OPO

2 stops14h 05mIberia

Tue 5/68:35 pmOPO - DCA

2 stops31h 01mIberia

Deal found 4/23

$1,206

Sat 5/32:30 pmDCA - OPO

2 stops15h 10mKLM

Mon 5/196:15 amOPO - DCA

2 stops16h 52mKLM

Deal found 4/23

$1,005

Sun 5/410:20 pmIAD - OPO

1 stop12h 00mMultiple Airlines

Wed 5/215:35 pmOPO - IAD

2 stops26h 45mMultiple Airlines

Deal found 4/23

$690

Sun 5/410:20 pmIAD - OPO

1 stop12h 00mTAP AIR PORTUGAL

Thu 5/159:00 amOPO - IAD

1 stop11h 20mTAP AIR PORTUGAL

Deal found 4/23

$711

Sun 5/49:45 amIAD - OPO

2 stops21h 15mAir Canada

Tue 5/206:00 amOPO - IAD

2 stops20h 08mAir Canada

Deal found 4/23

$821

Tue 5/610:20 pmIAD - OPO

1 stop13h 40mTAP AIR PORTUGAL

Fri 5/1610:00 amOPO - IAD

1 stop11h 20mTAP AIR PORTUGAL

Deal found 4/23

$679

One-way flights from District of Columbia to Porto
Search for one-way flight options from District of Columbia to Porto. Find affordable one-way fares based on user searches. Data last updated April 24, 2025.

Thu 7/101:31 pmIAD - OPO

3 stops27h 24mMultiple Airlines

Deal found 4/21

$374

Mon 5/266:00 amDCA - OPO

3 stops28h 35mMultiple Airlines

Deal found 4/22

$420

Thu 7/1010:20 pmIAD - OPO

1 stop11h 40mTAP AIR PORTUGAL

Deal found 4/21

$445

Mon 6/168:18 amIAD - OPO

2 stops20h 17mAir Canada

Deal found 4/22

$549

Mon 6/169:40 amDCA - OPO

1 stop18h 55mUnited Airlines

Deal found 4/22

$549

Mon 6/304:30 pmDCA - OPO

1 stop12h 05mAir Canada

Deal found 4/23

$553

Mon 6/164:00 pmIAD - OPO

2 stops12h 35mUnited Airlines

Deal found 4/21

$554

Wed 5/712:35 pmDCA - OPO

2 stops26h 20mIberia

Deal found 4/23

$571

Wed 6/411:10 amDCA - OPO

1 stop18h 20mTAP AIR PORTUGAL

Deal found 4/22

$626

Sat 5/176:30 pmIAD - OPO

1 stop16h 00mKLM

Deal found 4/22

$632

Wed 5/215:35 pmIAD - OPO

1 stop18h 50mSWISS

Deal found 4/22

$723

Fri 5/3012:35 pmDCA - OPO

2 stops14h 00mAmerican Airlines

Deal found 4/22

$762

Cheapflights Fare Finder

Use the filters below to find and compare flights from District of Columbia to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 9/9

5:00 pm-8:00 am

1 stop10h 00m

Porto

Wed 9/17

9:00 am-3:20 pm

1 stop11h 20m

$676

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 9/17

4:35 pm-9:20 am

1 stop11h 45m

Porto

Thu 10/9

6:00 am-9:51 pm

2 stops20h 51m

$684

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 5/4

10:20 pm-3:20 pm

1 stop12h 00m

Porto

Wed 5/21

5:35 pm-3:20 pm

2 stops26h 45m

$690

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 9/24

1:00 pm-9:20 am

1 stop15h 20m

Porto

Tue 10/7

6:00 am-9:25 pm

2 stops20h 25m

$691

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 6/23

3:40 pm-6:55 am

1 stop10h 15m

Porto

Tue 7/1

12:50 pm-11:53 am

2 stops28h 03m

$700

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 9/9

5:15 pm-7:45 am

1 stop9h 30m

Porto

Tue 9/16

12:50 pm-9:51 pm

1 stop14h 01m

$703

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 5/7

8:45 pm-6:30 pm

1 stop16h 45m

Porto

Tue 5/20

8:40 am-4:15 pm

1 stop12h 35m

$712

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 10/1

12:30 pm-7:35 am

2 stops14h 05m

Porto

Wed 10/8

8:15 am-7:15 pm

2 stops16h 00m

$718

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 5/7

12:25 pm-3:30 pm

2 stops22h 05m

Porto

Tue 5/20

11:25 am-3:35 pm

1 stop33h 10m

$720

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Thu 9/11

9:40 pm-3:50 pm

1 stop37h 10m

Porto

Wed 9/17

10:50 am-7:45 pm

1 stop37h 55m

$728

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 37 results

Best time to book a flight from District of Columbia to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto 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 Porto

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

Currently, January is the cheapest month in which you can book a flight from District of Columbia to Porto (average of $523). Flying from District of Columbia to Porto in June is currently the most expensive (average of $1,081). 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 OPO?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from District of Columbia to Porto as you normally would.

Rainfall in Porto 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

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

Read through reviews of airlines operating flights from District of Columbia to Porto, such as Delta, KLM and SWISS. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,920 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS

7.5

Good

1,582 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France

7.4

Good

1,442 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,685 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly into for flights to Porto from District of Columbia?
Porto (OPO) is the airport you will fly into if you book a flight from District of Columbia to Porto. It is only a 6.8 mi journey from Porto (OPO) to Porto’s city center.
What are the cheapest airlines to fly from District of Columbia to Porto one-way?
$445 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from $549 and $549, respectively.
Can I find deals for flights from District of Columbia to Porto that include hotel bookings?
Yes. In addition to deals on District of Columbia to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from District of Columbia to Porto?
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 Porto.
Can I find deals for business class flights from District of Columbia to Porto?
Yes. Cheapflights offers flight deals from District of Columbia 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 District of Columbia to Porto?
Currently, January is the cheapest month in which you can book a flight from District of Columbia to Porto (average of $523). Flying from District of Columbia to Porto in June is currently the most expensive (average of $1,081). 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

Aveiro

Coimbra

Matosinhos

Arcos de Valdevez

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Top 8 airlines flying from District of Columbia to Porto

Airline	Cheapest	Average	Flexibility	On-time
Air France	Cheapest$422	Average$818	FlexibilityNo cancel fee	On-time77%
Delta	Cheapest$423	Average$753	FlexibilityNo cancel fee	On-timeN/A
KLM	Cheapest$435	Average$685	FlexibilityNo cancel fee	On-time75%
TAP AIR PORTUGAL	Cheapest$457	Average$750	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$538	Average$975	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$567	Average$828	FlexibilityNo cancel fee	On-time71%
Iberia	Cheapest$579	Average$798	FlexibilityNo cancel fee	On-time77%
Lufthansa	Cheapest$603	Average$754	FlexibilityNo cancel fee	On-time76%

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$255+ Cheap flights from District of Columbia 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from District of Columbia to Porto with Cheapflights

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Cheap flight deals from District of Columbia to Porto

Keep the following information in mind while searching for District of Columbia to Porto flight deals. Data was last updated April 24, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from District of Columbia to Porto

Cheapest flights from District of Columbia to PortoExplore the most affordable flight options available from District of Columbia to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

Explore the most affordable flight options available from District of Columbia to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from District of Columbia to Porto that are best for you.

Best time to book a flight from District of Columbia to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from District of Columbia with our price prediction graph.

Cheapflights Insights

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

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

What is the cheapest time of day to fly from DC to OPO?

Find hourly flight availability from District of Columbia 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 April 24, 2025.

Rainfall in Porto by month

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

Temperature in Porto by month

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

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 April 24, 2025.

Read through reviews of airlines operating flights from District of Columbia to Porto, such as Delta, KLM and SWISS. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from District of Columbia 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 District of Columbia?

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

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

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

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

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

Traveling to a place near District of Columbia?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for District of Columbia to Porto

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Top 8 airlines flying from District of Columbia to Porto

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Cheapest flights from District of Columbia to Porto
Explore the most affordable flight options available from District of Columbia to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.