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$301+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — OPO
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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The best prices from Atlanta Hartsfield-Jackson to Porto are usually found in January or March, booked 74 days in advance, depart on a Tuesday or Monday and return on a Monday

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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$555
(KLM)

One-way from

$301
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$766
Provider with most accurate pricing for Atlanta Hartsfield-Jackson-Porto flight deals.
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Provider most trusted by Cheapflights users for Atlanta Hartsfield-Jackson-Porto flights.
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From Atlanta Hartsfield-Jackson to Porto
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One-way flight from Atlanta Hartsfield-Jackson to Porto
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Highest demand for flights based on searches. 23% potential increase in price ($326 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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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 February 20, 2025.

This KLM deal was found by Cheapflights users on 2/20. 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 3/116:00 pmATL - OPO
1 stop12h 45mKLM
Tue 3/186:00 amOPO - ATL
1 stop19h 30mKLM
Deal found 2/20$555
This Delta deal was found by Cheapflights users on 2/20. 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 3/116:10 pmATL - OPO
2 stops17h 15mDelta
Tue 3/186:00 amOPO - ATL
1 stop13h 40mDelta
Deal found 2/20$560
This Expedia deal was found by Cheapflights users on 2/20. 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 3/1111:15 pmATL - OPO
2 stops16h 45mMultiple Airlines
Tue 3/188:40 pmOPO - ATL
2 stops27h 46mMultiple Airlines
Deal found 2/20$566
This oojo deal was found by Cheapflights users on 2/19. 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.
Mon 9/19:45 pmATL - OPO
1 stop31h 05mTurkish Airlines
Tue 9/910:50 amOPO - ATL
1 stop38h 00mTurkish Airlines
Deal found 2/19$629
This United Airlines deal was found by Cheapflights users on 2/19. 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 11/264:50 pmATL - OPO
1 stop17h 25mUnited Airlines
Wed 12/36:00 amOPO - ATL
2 stops39h 43mUnited Airlines
Deal found 2/19$638
This Gotogate deal was found by Cheapflights users on 2/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2212:46 pmATL - OPO
2 stops25h 44mBritish Airways
Wed 5/78:15 amOPO - ATL
2 stops20h 36mBritish Airways
Deal found 2/19$838
This FlightHub deal was found by Cheapflights users on 2/20. 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.
Mon 9/17:55 pmATL - OPO
1 stop34h 20mScandinavian Airlines
Tue 9/911:35 amOPO - ATL
2 stops34h 45mScandinavian Airlines
Deal found 2/20$938
This Air Canada deal was found by Cheapflights users on 2/19. 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.
Mon 9/226:25 amATL - OPO
2 stops22h 05mAir Canada
Tue 9/3012:15 pmOPO - ATL
2 stops30h 33mAir Canada
Deal found 2/19$952
This FlightHub deal was found by Cheapflights users on 2/19. 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.
Sun 9/214:35 pmATL - OPO
2 stops17h 45mTAP AIR PORTUGAL
Wed 10/16:05 pmOPO - ATL
2 stops44h 42mTAP AIR PORTUGAL
Deal found 2/19$961
This Aeromexico deal was found by Cheapflights users on 2/19. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/302:59 pmATL - OPO
2 stops36h 26mAir France
Wed 5/144:20 pmOPO - ATL
1 stop25h 35mAir France
Deal found 2/19$974
This Gurufare deal was found by Cheapflights users on 2/20. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/24:05 pmATL - OPO
1 stop14h 10mLufthansa
Wed 5/1412:10 pmOPO - ATL
1 stop31h 10mLufthansa
Deal found 2/20$1,066
This oojo deal was found by Cheapflights users on 2/20. 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.
Fri 4/411:16 amATL - OPO
2 stops15h 19mIberia
Sat 4/128:35 pmOPO - ATL
2 stops31h 36mIberia
Deal found 2/20$1,131

Find flights from Atlanta to Porto within your budget

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 February 20, 2025.

Fly from

Atlanta

Fly to

Porto

Route

Depart

Return

Price

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Tue 3/11

6:00 pm-10:45 am

1 stop12h 45m

Porto

Tue 3/18

6:00 am-9:30 pm

1 stop19h 30m

$555

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Tue 3/11

6:10 pm-3:25 pm

2 stops17h 15m

Porto

Tue 3/18

6:00 am-3:40 pm

1 stop13h 40m

$560

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Tue 3/11

11:15 pm-8:00 pm

2 stops16h 45m

Porto

Tue 3/18

8:40 pm-8:26 pm

2 stops27h 46m

$566

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Tue 4/22

9:45 pm-3:50 pm

1 stop37h 05m

Porto

Wed 5/7

10:50 am-7:50 pm

1 stop38h 00m

$629

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sat 3/15

3:35 pm-11:35 am

2 stops40h 00m

Porto

Sat 3/22

12:30 pm-4:41 pm

2 stops56h 11m

$646

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Tue 4/22

12:46 pm-7:30 pm

2 stops25h 44m

Porto

Wed 5/7

8:15 am-11:51 pm

2 stops20h 36m

$838

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 4/30

2:59 pm-8:25 am

2 stops36h 26m

Porto

Wed 5/14

4:20 pm-12:55 pm

1 stop25h 35m

$974

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Mon 5/19

6:20 pm-10:55 pm

2 stops23h 35m

Porto

Thu 5/29

6:10 pm-10:14 am

2 stops45h 04m

$1,041

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Mon 5/19

7:55 pm-11:00 am

1 stop34h 05m

Porto

Wed 5/28

12:15 pm-5:20 pm

1 stop34h 05m

$1,057

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Fri 5/2

4:05 pm-11:15 am

1 stop14h 10m

Porto

Wed 5/14

12:10 pm-2:20 pm

1 stop31h 10m

$1,066

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star

*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 FlightHub the most. FlightHub 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.

Travel insights for flights from Atlanta to Porto

Get recent, data-driven insights about flights from Atlanta to Porto including ideal travel times, pricing trends, and more.

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 February 14, 2025.

Booking 74 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, January is the cheapest month in which you can book a flight from Atlanta to Porto (average of $523). Flying from Atlanta to Porto in June is currently the most expensive (average of $1,092). 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 February 20, 2025.

It’s typically best to fly out from Atlanta to Porto in the morning. Doing so could potentially save you 30% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Atlanta to Porto?

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

Travelers seeking maximum savings on their Atlanta to Porto flight should consider departing on Tuesday mornings when fares are most often at their lowest. Friday afternoons 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 February 20, 2025.
See what other customers who have flown with Delta, KLM and Austrian Airlines from Atlanta to Porto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,220 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

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
8.0
Very good
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

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
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,220 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

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.

Austrian Airlines
7.6
Good
773 reviews
Delta
8.0
Very good
8,220 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

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
1,449 reviews
Delta
8.0
Very good
8,220 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

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
8,766 reviews
Delta
8.0
Very good
8,220 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

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.

  • 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 Delta and Turkish Airlines, with the lowest prices starting at $560 and $629, respectively. KLM is priced at 46% 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, January is the cheapest month in which you can book a flight from Atlanta to Porto (average of $523). Flying from Atlanta to Porto in June is currently the most expensive (average of $1,092). 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 7 airlines flying from Atlanta to Porto

Discover the top 7 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$549Average$574FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$568Average$668FlexibilityNo cancel feeOn-time76%
KLMCheapest$589Average$1,031FlexibilityNo cancel feeOn-time75%
DeltaCheapest$613Average$1,111FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$626Average$787FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$874Average$1,356FlexibilityNo cancel feeOn-time69%
Air FranceCheapest$1,068Average$1,232FlexibilityNo cancel feeOn-time77%
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