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Cheap flights from Atlanta to Porto from $577

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Atlanta to Porto departing on 2/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
5:40 pm - 10:30 amATL-OPO
11h 50m1 stop
KLM Logo
6:00 am - 8:45 pmOPO-ATL
19h 45m1 stop
$577KLM
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Sun, Feb 1 - Wed, Feb 11
Lufthansa Logo
1:15 pm - 12:50 pmATL-OPO
18h 35m2 stops
Lufthansa Logo
6:00 am - 7:59 pmOPO-ATL
18h 59m2 stops
$579Lufthansa
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Sun, Feb 1 - Wed, Feb 11
Delta Logo
1:11 pm - 10:30 amATL-OPO
16h 19m2 stops
Delta Logo
6:00 am - 8:45 pmOPO-ATL
19h 45m1 stop
$581Delta
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Sun, Feb 1 - Wed, Feb 11
Delta Logo
12:34 pm - 10:30 amATL-OPO
16h 56m2 stops
Delta Logo
11:15 am - 2:55 pmOPO-ATL
32h 40m1 stop
$587Delta
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Wed, Jan 7 - Tue, Jan 13
Lufthansa Logo
4:55 pm - 11:40 amATL-OPO
13h 45m1 stop
Lufthansa Logo
4:15 pm - 2:30 pmOPO-ATL
27h 15m1 stop
$609Lufthansa
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Wed, Jan 7 - Tue, Jan 13
Delta Logo
12:34 pm - 10:30 amATL-OPO
16h 56m2 stops
Delta Logo
6:30 am - 1:35 pmOPO-ATL
36h 05m1 stop
$637Delta
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Wed, Jan 7 - Mon, Jan 12
SWISS Logo
1:15 pm - 11:10 amATL-OPO
16h 55m2 stops
SWISS Logo
12:10 pm - 9:15 pmOPO-ATL
38h 05m2 stops
$646SWISS
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Thu, Jan 8 - Wed, Jan 21
Delta Logo
12:34 pm - 10:30 amATL-OPO
16h 56m2 stops
Delta Logo
6:05 am - 8:35 pmOPO-ATL
19h 30m2 stops
$647Delta
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Wed, Jan 7 - Tue, Jan 13
Multiple Airlines Logo
4:55 pm - 11:40 amATL-OPO
13h 45m1 stop
Multiple Airlines Logo
12:30 pm - 9:53 pmOPO-ATL
38h 23m2 stops
$658Multiple Airlines
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Thu, Jan 8 - Wed, Jan 21
Lufthansa Logo
4:55 pm - 11:40 amATL-OPO
13h 45m1 stop
Lufthansa Logo
12:30 pm - 2:30 pmOPO-ATL
31h 00m1 stop
$660Lufthansa
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Thu, Jan 8 - Wed, Jan 21

KLM flights from Atlanta to Porto

Our best KLM deals on Atlanta to Porto flight tickets
KLM
Feb 1
ATL5:40 pmAtlanta Hartsfield-Jackson
11h 50m
1 stop
OPO10:30 amPorto
Feb 11
OPO6:00 amPorto
19h 45m
1 stop
ATL8:45 pmAtlanta Hartsfield-Jackson
$577
Find similar
KLM
Feb 16
ATL5:40 pmAtlanta Hartsfield-Jackson
11h 50m
1 stop
OPO10:30 amPorto
Feb 22
OPO4:10 pmPorto
26h 25m
1 stop
ATL1:35 pmAtlanta Hartsfield-Jackson
$627
Find similar
KLM
Feb 16
ATL3:50 pmAtlanta Hartsfield-Jackson
13h 40m
1 stop
OPO10:30 amPorto
Feb 22
OPO4:10 pmPorto
27h 35m
1 stop
ATL2:45 pmAtlanta Hartsfield-Jackson
$651
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Lufthansa flights from Atlanta to Porto

Our best Lufthansa deals on Atlanta to Porto flight tickets
Lufthansa
Mar 3
ATL2:39 pmAtlanta Hartsfield-Jackson
17h 11m
2 stops
OPO12:50 pmPorto
Mar 12
OPO6:00 amPorto
19h 19m
2 stops
ATL9:19 pmAtlanta Hartsfield-Jackson
$579
Find similar
Lufthansa
Jan 7
ATL4:55 pmAtlanta Hartsfield-Jackson
13h 45m
1 stop
OPO11:40 amPorto
Jan 13
OPO4:15 pmPorto
27h 15m
1 stop
ATL2:30 pmAtlanta Hartsfield-Jackson
$609
Find similar
Lufthansa
Mar 8
ATL5:55 pmAtlanta Hartsfield-Jackson
13h 45m
1 stop
OPO11:40 amPorto
Mar 15
OPO4:15 pmPorto
33h 04m
2 stops
ATL9:19 pmAtlanta Hartsfield-Jackson
$652
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated November 16, 2025.
Use the filters below to find and compare flights from Atlanta to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sun 2/1

5:40 pm-10:30 am

1 stop11h 50m

Porto

Wed 2/11

6:00 am-8:45 pm

1 stop19h 45m

$577

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sun 2/1

1:15 pm-12:50 pm

2 stops18h 35m

Porto

Wed 2/11

6:00 am-7:59 pm

2 stops18h 59m

$579

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sun 2/1

1:11 pm-10:30 am

2 stops16h 19m

Porto

Wed 2/11

6:00 am-8:45 pm

1 stop19h 45m

$581

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 1/7

12:34 pm-10:30 am

2 stops16h 56m

Porto

Tue 1/13

11:15 am-2:55 pm

1 stop32h 40m

$587

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 1/7

4:55 pm-11:40 am

1 stop13h 45m

Porto

Tue 1/13

4:15 pm-2:30 pm

1 stop27h 15m

$609

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 1/7

12:34 pm-10:30 am

2 stops16h 56m

Porto

Mon 1/12

6:30 am-1:35 pm

1 stop36h 05m

$637

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Thu 1/8

1:15 pm-11:10 am

2 stops16h 55m

Porto

Wed 1/21

12:10 pm-9:15 pm

2 stops38h 05m

$646

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 1/7

12:34 pm-10:30 am

2 stops16h 56m

Porto

Tue 1/13

6:05 am-8:35 pm

2 stops19h 30m

$647

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Thu 1/8

4:55 pm-11:40 am

1 stop13h 45m

Porto

Wed 1/21

12:30 pm-9:53 pm

2 stops38h 23m

$658

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Thu 1/8

4:55 pm-11:40 am

1 stop13h 45m

Porto

Wed 1/21

12:30 pm-2:30 pm

1 stop31h 00m

$660

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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See travel insights to Porto from

How to get the cheapest flight ticket from Atlanta to Porto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Porto?

The month of February is, on average, the cheapest month to fly to Porto from Atlanta, with most prices found around $608. If you aren’t able to travel during the month of February, then book flights to Porto from Atlanta during March instead. Flights to Porto in March, while not as cheap as those in February, still average around $708.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Tuesday when prices can be found for as low as $936. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,367. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the morning is the cheapest time of day to fly from Atlanta to Porto when you can find flight prices for as low as $855. Flying to Porto in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,205 on average. Flights to Porto from Atlanta in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from Atlanta when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $884 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Atlanta for as low as $666 on momondo.

When to book flights from Atlanta to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Atlanta to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Atlanta to Porto (ATL to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Atlanta to Porto

Direct flights

None
There are no direct flights from Atlanta to Porto. There are no popular flight routes from Atlanta to Porto.
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  • How far is Atlanta Hartsfield-Jackson to Porto by plane?

    Atlanta Hartsfield-Jackson and Porto are 4052.2 mi apart from one another. 11h 40m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Atlanta Hartsfield-Jackson Airport to Porto Airport?

    Prices for flights from Atlanta Hartsfield-Jackson Airport to Porto Airport are updated daily.

  • How many operators does momondo search for flights from Atlanta Hartsfield-Jackson Airport to Porto Airport?

  • How old do you have to be to fly from Atlanta Hartsfield-Jackson Airport to Porto Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Atlanta Hartsfield-Jackson Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The necessary travel and health documents for your Porto Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Atlanta to Porto?

Best airlines flying from Atlanta to Porto

Compare and see reviews for airlines that fly from Atlanta to Porto with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $555Free CancellationRating
7.7
1,411 reviews
Search KLM flights
LufthansaPriceFrom $568Free CancellationRating
6.8
7,576 reviews
Search Lufthansa flights
United AirlinesPriceFrom $592Free CancellationRating
7.4
9,013 reviews
Search United Airlines flights
DeltaPriceFrom $611Free CancellationRating
7.9
8,006 reviews
Search Delta flights
Turkish AirlinesPriceFrom $644Free CancellationRating
7.3
4,046 reviews
Search Turkish Airlines flights
Air FrancePriceFrom $1,065Free CancellationRating
7.4
1,487 reviews
Search Air France flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Aveiro
Matosinhos
Braga
Lamego
Guimarães
Esposende
Chaves
Espinho
Viseu
Ponte de Lima
Arcos de Valdevez
Pinhao
Curia
Penafiel
Mesao Frio
Mira
Baiao

Why use momondo?

Why should I use momondo to find a flight deal from Atlanta to Porto?

It is quick and easy to find Atlanta to Porto flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Porto that suits you.

Can I find flights from Atlanta to Porto with flexible booking policies on momondo?

Flights from Atlanta to Porto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Atlanta to Porto?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Porto from Atlanta.

I’m not ready to book a flight from Atlanta to Porto right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Porto, momondo offers a useful price alert feature which will track prices for flights to Porto from Atlanta and alert you when they change.

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