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$526+ Cheap flights from Atlanta (ATL) to Porto (OPO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — OPO
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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Cheapflights Tip: The best prices from Atlanta Hartsfield-Jackson to Porto are usually found in February or January, booked 90 days in advance, depart on a Tuesday or Monday and return on a Monday

Find flight deals from Atlanta to Porto

Cheapest flights from Atlanta to Porto
Explore the most affordable flight options available from Atlanta to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2025.

This Air France deal was found by Cheapflights users on 10/25. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/253:50 pmATL - OPO
1 stop13h 40mMultiple Airlines
Wed 12/34:10 pmOPO - ATL
1 stop26h 25mMultiple Airlines
Deal found 10/25$526
This Delta deal was found by Cheapflights users on 10/25. 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.
Mon 11/2410:30 amATL - OPO
2 stops19h 00mDelta
Mon 12/86:30 amOPO - ATL
1 stop15h 25mDelta
Deal found 10/25$527
This KLM deal was found by Cheapflights users on 10/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/263:50 pmATL - OPO
1 stop13h 40mKLM
Wed 12/36:00 amOPO - ATL
1 stop15h 55mKLM
Deal found 10/27$532
This Mytrip deal was found by Cheapflights users on 10/24. 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.
Tue 12/212:55 pmATL - OPO
2 stops17h 45mMultiple Airlines
Mon 12/84:15 pmOPO - ATL
1 stop27h 15mMultiple Airlines
Deal found 10/24$535
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/253:50 pmATL - OPO
1 stop13h 40mDelta
Wed 12/36:00 amOPO - ATL
2 stops20h 50mDelta
Deal found 10/26$536
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2712:45 pmATL - OPO
2 stops16h 40mDelta
Wed 12/36:00 amOPO - ATL
2 stops17h 40mDelta
Deal found 10/27$541
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2610:10 amATL - OPO
2 stops18h 20mUnited Airlines
Wed 12/312:30 pmOPO - ATL
2 stops33h 58mUnited Airlines
Deal found 10/27$543
This Booking.com deal was found by Cheapflights users on 10/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/24:55 pmATL - OPO
1 stop13h 45mLufthansa
Mon 12/84:15 pmOPO - ATL
1 stop27h 15mLufthansa
Deal found 10/24$552
This Delta deal was found by Cheapflights users on 10/25. 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.
Mon 11/245:40 pmATL - OPO
1 stop11h 50mDelta
Mon 12/111:15 amOPO - ATL
2 stops39h 35mDelta
Deal found 10/25$561
This Orbitz deal was found by Cheapflights users on 10/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2412:55 pmATL - OPO
2 stops18h 55mMultiple Airlines
Mon 12/112:55 pmOPO - ATL
2 stops30h 35mMultiple Airlines
Deal found 10/25$565

Cheap flight deals from Atlanta to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Atlanta (ATL) 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 October 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$526
(Air France)

Popular in

June

Cheapest in

February

Average price

$873
Provider with most accurate pricing for Atlanta Hartsfield-Jackson-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Atlanta Hartsfield-Jackson-Porto flights.
Search Deals
From Atlanta Hartsfield-Jackson to Porto
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($308 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Atlanta 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 October 27, 2025.
Use the filters below to find and compare flights from Atlanta to Porto that are best for you.

Fly from

Atlanta

Fly to

Porto

Route

Depart

Return

Price

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Thu 1/22

12:15 pm-10:25 am

2 stops17h 10m

Porto

Thu 2/5

6:35 am-8:45 pm

1 stop19h 10m

$531

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Mon 11/24

3:23 pm-10:30 am

2 stops14h 07m

Porto

Mon 12/8

6:30 am-4:55 pm

1 stop15h 25m

$531

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 11/26

3:50 pm-10:30 am

1 stop13h 40m

Porto

Wed 12/3

6:00 am-4:55 pm

1 stop15h 55m

$532

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Tue 11/25

5:40 pm-10:30 am

1 stop11h 50m

Porto

Wed 12/3

6:00 am-9:40 pm

2 stops20h 40m

$536

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Thu 11/27

12:45 pm-10:25 am

2 stops16h 40m

Porto

Wed 12/3

6:00 am-6:40 pm

2 stops17h 40m

$541

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 11/26

10:10 am-9:30 am

2 stops18h 20m

Porto

Wed 12/3

12:30 pm-5:28 pm

2 stops33h 58m

$543

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Tue 11/25

2:42 pm-9:30 am

2 stops13h 48m

Porto

Wed 12/3

12:30 pm-9:53 pm

2 stops38h 23m

$546

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 12/10

11:00 am-10:30 am

2 stops18h 30m

Porto

Wed 12/17

6:00 am-9:39 pm

2 stops20h 39m

$546

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Tue 3/3

2:39 pm-9:30 am

2 stops13h 51m

Porto

Thu 3/12

6:00 am-9:43 pm

2 stops43h 43m

$579

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Fri 11/7

7:35 pm-11:40 pm

2 stops23h 05m

$604

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 16 results
1
2

Compare providers for flights from Atlanta to Porto

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Atlanta to Porto in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Atlanta-Porto flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Atlanta-Porto flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Atlanta-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Atlanta-Porto flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Atlanta-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Atlanta to Porto

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

How far ahead should I book a flight from Atlanta to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Atlanta to Porto. Price data was last updated on October 24, 2025.

Booking 90 days in advance of your planned departure date is, on average, the best time to get cheap flights from Atlanta to Porto. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Atlanta to Porto?

Currently, February is the cheapest month in which you can book a flight from Atlanta to Porto (average of $525). Flying from Atlanta to Porto in June is currently the most expensive (average of $891). 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 ATL to OPO?

Find hourly flight availability from Atlanta 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 October 27, 2025.

It’s typically best to fly out from Atlanta to Porto in the morning. Doing so could potentially save you 29% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 October 27, 2025.
Read through reviews of airlines operating flights from Atlanta to Porto, such as Delta, KLM, and Air France. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,996 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

ATL - JNB

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
Delta
7.9
Good
7,996 reviews
Delta
7.9
Good
7,996 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

ATL - JNB

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
KLM
7.7
Good
1,406 reviews
Delta
7.9
Good
7,996 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

ATL - JNB

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
Air France
7.4
Good
1,479 reviews
Delta
7.9
Good
7,996 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

ATL - JNB

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
United Airlines
7.4
Good
8,999 reviews
Delta
7.9
Good
7,996 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

ATL - JNB

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.
Turkish Airlines
7.3
Good
4,030 reviews
Delta
7.9
Good
7,996 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

ATL - JNB

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from Atlanta to Porto. 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 Atlanta to Porto?

    A quick flight from Atlanta to Porto can take about 13h 40m. Delta provides one of the quickest options available for as low as $532. There are 4053 mi between Atlanta and Porto. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Atlanta to Porto round-trip?

    Flying on KLM is currently your cheapest option to Porto, with prices starting at $561. Additional round-trip tickets that might be worth considering are offered by Lufthansa and United Airlines, with the lowest prices starting at $568 and $592, respectively. KLM is priced at 37% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Atlanta to Porto one-way?

    For one-way options, check prices for Lufthansa. According to our data, you can fly for as low as $604. Users have also found prices from $605 and $606 on KLM and United Airlines, respectively.

  • Can I find deals for flights from Atlanta to Porto that include hotel bookings?

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

  • How can I find direct flights from Atlanta to Porto?

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

  • Can I find deals for business class flights from Atlanta to Porto?

    Yes. Cheapflights offers flight deals from Atlanta 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 Atlanta to Porto?

    Currently, February is the cheapest month in which you can book a flight from Atlanta to Porto (average of $525). Flying from Atlanta to Porto in June is currently the most expensive (average of $891). 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

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Arcos de Valdevez
Coimbra

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Atlanta to Porto

Discover the top 6 airlines that operate flights from Atlanta 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 October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$561Average$954FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$568Average$703FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$592Average$871FlexibilityNo cancel feeOn-time69%
DeltaCheapest$611Average$1,003FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$644Average$697FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$1,065Average$1,260FlexibilityNo cancel feeOn-time77%

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