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$332+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — OPO
May 3 — May 101
Sat 5/3
Sat 5/10
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 24 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 April 28, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$790
(Air Canada)

One-way from

$603
(Air Canada)

Popular in

June

Cheapest in

February

Average price

$886
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. 22% potential increase in price ($293 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($35 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 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 April 28, 2025.

This Air Canada deal was found by Cheapflights users on 4/28. 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.
Tue 11/119:00 amATL - OPO
2 stops21h 15mAir Canada
Wed 11/196:00 amOPO - ATL
2 stops20h 03mAir Canada
Deal found 4/28$640
This KLM deal was found by Cheapflights users on 4/28. 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 11/113:50 pmATL - OPO
1 stop14h 00mKLM
Wed 11/194:10 pmOPO - ATL
1 stop26h 25mKLM
Deal found 4/28$644
This FlightHub deal was found by Cheapflights users on 4/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/114:50 pmATL - OPO
1 stop17h 25mMultiple Airlines
Wed 11/196:00 amOPO - ATL
2 stops20h 03mMultiple Airlines
Deal found 4/27$645
This Delta deal was found by Cheapflights users on 4/28. 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 11/1111:59 amATL - OPO
2 stops17h 51mDelta
Wed 11/195:00 amOPO - ATL
1 stop20h 30mDelta
Deal found 4/28$649
This United Airlines deal was found by Cheapflights users on 4/27. 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.
Thu 11/137:05 amATL - OPO
2 stops21h 25mUnited Airlines
Tue 11/1812:35 pmOPO - ATL
2 stops27h 04mUnited Airlines
Deal found 4/27$686
This oojo deal was found by Cheapflights users on 4/28. 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 stop37h 05mTurkish Airlines
Tue 9/94:50 pmOPO - ATL
1 stop32h 00mTurkish Airlines
Deal found 4/28$690
This oojo deal was found by Cheapflights users on 4/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/208:00 pmATL - OPO
1 stop15h 55mScandinavian Airlines
Fri 11/285:45 pmOPO - ATL
1 stop28h 40mScandinavian Airlines
Deal found 4/27$704
This American Airlines deal was found by Cheapflights users on 4/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/106:27 pmATL - OPO
2 stops16h 28mAmerican Airlines
Sun 8/248:15 amOPO - ATL
2 stops15h 27mAmerican Airlines
Deal found 4/28$887
This Gurufare deal was found by Cheapflights users on 4/27. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/204:50 pmATL - OPO
2 stops15h 00mLufthansa
Fri 11/2812:30 pmOPO - ATL
1 stop31h 35mLufthansa
Deal found 4/27$890
This SWISS deal was found by Cheapflights users on 4/26. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/103:30 pmATL - OPO
2 stops45h 45mSWISS
Fri 5/237:20 pmOPO - ATL
2 stops31h 04mSWISS
Deal found 4/26$891
This British Airways deal was found by Cheapflights users on 4/27. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1110:15 pmATL - OPO
1 stop17h 05mBritish Airways
Sat 5/2410:40 amOPO - ATL
1 stop14h 45mBritish Airways
Deal found 4/27$963
This Justfly.com deal was found by Cheapflights users on 4/27. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/77:45 amATL - OPO
2 stops34h 55mTAP AIR PORTUGAL
Wed 6/186:10 pmOPO - ATL
1 stop33h 43mTAP AIR PORTUGAL
Deal found 4/27$1,021

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 April 28, 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

Mon 9/1

9:45 pm-3:50 pm

1 stop37h 05m

Porto

Tue 9/9

4:50 pm-7:50 pm

1 stop32h 00m

$690

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 9/24

2:05 pm-9:20 am

1 stop14h 15m

Porto

Tue 9/30

12:50 pm-1:42 pm

2 stops29h 52m

$775

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sun 7/6

4:05 pm-9:35 am

2 stops36h 30m

Porto

Wed 9/24

6:00 am-9:34 pm

2 stops20h 34m

$790

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sun 7/6

8:05 pm-3:30 pm

1 stop14h 25m

Porto

Wed 9/24

8:10 pm-12:35 pm

1 stop21h 25m

$814

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sun 7/6

3:35 pm-3:30 pm

1 stop18h 55m

Porto

Wed 9/24

6:15 am-9:50 pm

2 stops20h 35m

$825

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Fri 10/10

7:55 pm-6:10 pm

2 stops17h 15m

Porto

Tue 10/14

6:15 am-5:20 pm

2 stops40h 05m

$858

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sun 8/10

6:27 pm-3:55 pm

2 stops16h 28m

Porto

Sun 8/24

8:15 am-6:42 pm

2 stops15h 27m

$887

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sat 5/10

3:30 pm-6:15 pm

2 stops45h 45m

Porto

Fri 5/23

7:20 pm-9:24 pm

2 stops31h 04m

$891

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sun 5/11

10:15 pm-8:20 pm

1 stop17h 05m

Porto

Sat 5/24

10:40 am-8:25 pm

1 stop14h 45m

$963

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Tue 7/15

4:05 pm-9:20 am

2 stops36h 15m

Porto

Tue 7/22

6:00 am-12:21 pm

2 stops35h 21m

$975

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 18 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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Atlanta-Porto flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 April 25, 2025.

Booking 24 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 $1,071). 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 April 28, 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 April 28, 2025.
See what other customers who have flown with Delta, KLM and SWISS 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
7,929 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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.
SWISS
7.5
Good
1,587 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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
8,696 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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
3,785 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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.

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

    Flying on United Airlines is currently your cheapest option to Porto, with prices starting at $808. Additional round-trip tickets that might be worth considering are offered by KLM and Delta, with the lowest prices starting at $814 and $825, respectively. United Airlines is priced at 18% 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 Air Canada. According to our data, you can fly for as low as $603. Users have also found prices from $807 and $851 on Air Europa and Turkish 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, 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 $1,071). 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 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 April 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$568Average$656FlexibilityNo cancel feeOn-time76%
KLMCheapest$569Average$1,032FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$579Average$1,187FlexibilityNo cancel feeOn-time69%
DeltaCheapest$612Average$1,077FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$626Average$709FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$1,068Average$1,235FlexibilityNo cancel feeOn-time77%

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