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$249+ Cheap flights from Atlanta (ATL) 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — OPO
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap 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 January 26, 2026.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/21:41 pm
ATL
-
OPO
2 stops20h 19m
Multiple Airlines
Tue 3/176:40 pm
OPO
-
ATL
1 stop18h 30m
Multiple Airlines
Deal found 1/26$520
This Expedia deal was found by Cheapflights users on 1/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2710:36 am
ATL
-
OPO
2 stops20h 09m
Iberia
Wed 5/68:20 am
OPO
-
ATL
2 stops18h 45m
Iberia
Deal found 1/24$522
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2810:30 pm
ATL
-
OPO
1 stop29h 35m
British Airways
Tue 5/58:20 am
OPO
-
ATL
2 stops15h 51m
British Airways
Deal found 1/26$527
This Kiwi.com deal was found by Cheapflights users on 1/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/117:02 pm
ATL
-
OPO
1 stop12h 53m
Multiple Airlines
Wed 3/188:55 am
OPO
-
ATL
2 stops15h 10m
Multiple Airlines
Deal found 1/25$531
This Kiwi.com deal was found by Cheapflights users on 1/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/115:55 pm
ATL
-
OPO
1 stop13h 45m
Lufthansa
Wed 3/184:15 pm
OPO
-
ATL
1 stop27h 15m
Lufthansa
Deal found 1/25$542
This United Airlines deal was found by Cheapflights users on 1/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/279:52 am
ATL
-
OPO
2 stops18h 53m
United Airlines
Wed 5/612:35 pm
OPO
-
ATL
1 stop13h 29m
United Airlines
Deal found 1/24$549
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/35:40 pm
ATL
-
OPO
1 stop11h 50m
KLM
Thu 3/125:00 am
OPO
-
ATL
1 stop13h 35m
KLM
Deal found 1/26$550
This KLM deal was found by Cheapflights users on 1/24. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/238:35 pm
ATL
-
OPO
1 stop32h 55m
KLM
Mon 3/211:15 am
OPO
-
ATL
1 stop31h 20m
KLM
Deal found 1/24$552
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/31:10 pm
ATL
-
OPO
2 stops16h 20m
Delta
Thu 3/125:00 am
OPO
-
ATL
1 stop20h 45m
Delta
Deal found 1/26$555
This Mytrip deal was found by Cheapflights users on 1/24. 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.
Mon 2/236:10 am
ATL
-
OPO
2 stops25h 40m
Multiple Airlines
Mon 3/24:15 pm
OPO
-
ATL
1 stop27h 15m
Multiple Airlines
Deal found 1/24$556

Find 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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$520
(Kiwi.com)

One-way from

$249
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$663
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
One-way flight from Atlanta Hartsfield-Jackson to Porto
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($273 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 26, 2026.
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

Tue 3/3

5:40 pm-10:30 am

1 stop11h 50m

Porto

Thu 3/12

5:00 am-2:35 pm

1 stop13h 35m

$550

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Tue 3/3

1:45 pm-10:30 am

2 stops15h 45m

Porto

Thu 3/12

5:00 am-5:50 pm

1 stop16h 50m

$555

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Mon 3/2

1:12 pm-10:30 am

2 stops16h 18m

Porto

Tue 3/17

5:00 am-9:48 pm

2 stops20h 48m

$565

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 4/8

12:59 pm-10:55 am

2 stops16h 56m

Porto

Tue 4/14

5:00 am-6:25 pm

2 stops18h 25m

$569

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Tue 4/28

11:25 am-11:10 am

2 stops18h 45m

Porto

Tue 5/5

12:00 pm-11:28 am

3 stops28h 28m

$593

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 3/4

12:00 pm-10:30 am

2 stops17h 30m

Porto

Wed 4/8

5:00 am-2:00 pm

1 stop14h 00m

$602

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 4/8

3:55 pm-11:10 am

1 stop14h 15m

Porto

Tue 4/14

8:40 am-9:28 pm

2 stops17h 48m

$613

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sun 3/22

9:10 pm-3:25 pm

1 stop14h 15m

Porto

Wed 4/8

5:00 am-8:09 pm

2 stops20h 09m

$614

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 2/25

4:35 pm-9:30 am

1 stop11h 55m

Porto

Sun 3/1

12:30 pm-2:30 pm

1 stop31h 00m

$618

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 4/15

8:00 am-6:50 am

2 stops41h 50m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Atlanta-Porto flight deals on Cheapflights vs. FlightHub >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 Expedia the most. Expedia 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 January 23, 2026.

Booking 17 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 $471). Flying from Atlanta to Porto in June is currently the most expensive (average of $868). 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.

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 January 26, 2026.
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
8,113 reviews

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

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
8,113 reviews
Delta
7.9
Good
8,113 reviews

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

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
1,442 reviews
Delta
7.9
Good
8,113 reviews

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

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
1,525 reviews
Delta
7.9
Good
8,113 reviews

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

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
9,199 reviews
Delta
7.9
Good
8,113 reviews

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

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
4,209 reviews
Delta
7.9
Good
8,113 reviews

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

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 11h 50m. KLM provides one of the quickest options available for as low as $550. 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 $555. Additional round-trip tickets that might be worth considering are offered by Lufthansa and Delta, with the lowest prices starting at $568 and $583, respectively. KLM is priced at 34% lower than the current average price of a flight leaving 3 months from now.

  • 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 $471). Flying from Atlanta to Porto in June is currently the most expensive (average of $868). 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
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

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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 January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$555Average$953FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$568Average$755FlexibilityNo cancel feeOn-time76%
DeltaCheapest$583Average$997FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$592Average$807FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$644Average$688FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$838Average$1,260FlexibilityNo cancel feeOn-time77%

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