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Cheap flights from Atlanta to Porto from $310

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Atlanta to Porto departing on 2/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Atlanta to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
3:50 pm - 10:30 am
ATL
-
OPO
13h 40m1 stop
KLM Logo
9:55 am - 8:45 pm
OPO
-
ATL
15h 50m1 stop
$546KLM
Mon, Feb 16 - Tue, Feb 24
Delta Logo
5:40 pm - 10:30 am
ATL
-
OPO
11h 50m1 stop
Delta Logo
11:15 am - 1:35 pm
OPO
-
ATL
31h 20m1 stop
$547Delta
Mon, Feb 23 - Mon, Mar 2
Multiple Airlines Logo
5:40 pm - 10:30 am
ATL
-
OPO
11h 50m1 stop
Multiple Airlines Logo
11:15 am - 1:35 pm
OPO
-
ATL
31h 20m1 stop
$548Multiple Airlines
Sun, Jan 18 - Mon, Feb 2
Delta Logo
1:11 pm - 10:30 am
ATL
-
OPO
16h 19m2 stops
Delta Logo
11:15 am - 1:35 pm
OPO
-
ATL
31h 20m1 stop
$551Delta
Mon, Feb 23 - Tue, Mar 3
KLM Logo
8:20 pm - 3:25 pm
ATL
-
OPO
14h 05m1 stop
KLM Logo
5:00 am - 2:35 pm
OPO
-
ATL
14h 35m1 stop
$552KLM
Wed, Feb 25 - Thu, Mar 5
KLM Logo
4:50 pm - 10:30 am
ATL
-
OPO
13h 40m1 stop
KLM Logo
7:00 pm - 12:45 pm
OPO
-
ATL
22h 45m1 stop
$558KLM
Sun, Mar 22 - Wed, Apr 8
KLM Logo
6:00 pm - 3:30 pm
ATL
-
OPO
16h 30m1 stop
KLM Logo
7:00 pm - 12:45 pm
OPO
-
ATL
22h 45m1 stop
$559KLM
Wed, Apr 8 - Wed, Apr 15
KLM Logo
8:05 pm - 3:30 pm
ATL
-
OPO
14h 25m1 stop
KLM Logo
7:00 pm - 12:45 pm
OPO
-
ATL
22h 45m1 stop
$560KLM
Wed, Apr 8 - Tue, Apr 14
Lufthansa Logo
2:39 pm - 1:15 pm
ATL
-
OPO
17h 36m2 stops
Lufthansa Logo
6:00 am - 7:17 pm
OPO
-
ATL
18h 17m2 stops
$561Lufthansa
Wed, Feb 25 - Wed, Mar 4
Delta Logo
3:50 pm - 3:25 pm
ATL
-
OPO
18h 35m1 stop
Delta Logo
5:00 am - 8:17 pm
OPO
-
ATL
20h 17m2 stops
$562Delta
Mon, Feb 16 - Tue, Feb 24

KLM flights from Atlanta to Porto

Our best KLM deals on Atlanta to Porto flight tickets
KLM
Feb 16
ATL3:50 pmAtlanta Hartsfield-Jackson
13h 40m
1 stop
OPO10:30 amPorto
Feb 24
OPO9:55 amPorto
15h 50m
1 stop
ATL8:45 pmAtlanta Hartsfield-Jackson
$546
Find similar
KLM
Mar 22
ATL4:50 pmAtlanta Hartsfield-Jackson
13h 40m
1 stop
OPO10:30 amPorto
Apr 8
OPO7:00 pmPorto
22h 45m
1 stop
ATL12:45 pmAtlanta Hartsfield-Jackson
$558
Find similar
KLM
Apr 8
ATL6:00 pmAtlanta Hartsfield-Jackson
16h 30m
1 stop
OPO3:30 pmPorto
Apr 15
OPO7:00 pmPorto
22h 45m
1 stop
ATL12:45 pmAtlanta Hartsfield-Jackson
$559
Find similar

United Airlines flights from Atlanta to Porto

Our best United Airlines deals on Atlanta to Porto flight tickets
United Airlines
Apr 8
ATL12:00 pmAtlanta Hartsfield-Jackson
16h 45m
2 stops
OPO9:45 amPorto
Apr 15
OPO6:00 amPorto
22h 19m
2 stops
ATL11:19 pmAtlanta Hartsfield-Jackson
$572
Find similar
United Airlines
Apr 7
ATL2:30 pmAtlanta Hartsfield-Jackson
14h 15m
2 stops
OPO9:45 amPorto
Apr 16
OPO12:35 pmPorto
13h 06m
1 stop
ATL8:41 pmAtlanta Hartsfield-Jackson
$578
Find similar
United Airlines
Apr 6
ATL8:15 amAtlanta Hartsfield-Jackson
20h 30m
2 stops
OPO9:45 amPorto
Apr 14
OPO12:35 pmPorto
16h 20m
2 stops
ATL11:55 pmAtlanta Hartsfield-Jackson
$582
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 December 4, 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

Mon 2/16

3:50 pm-10:30 am

1 stop13h 40m

Porto

Tue 2/24

9:55 am-8:45 pm

1 stop15h 50m

$546

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Mon 2/23

5:40 pm-10:30 am

1 stop11h 50m

Porto

Mon 3/2

11:15 am-1:35 pm

1 stop31h 20m

$547

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sun 1/18

5:40 pm-10:30 am

1 stop11h 50m

Porto

Mon 2/2

11:15 am-1:35 pm

1 stop31h 20m

$548

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Mon 2/23

1:11 pm-10:30 am

2 stops16h 19m

Porto

Tue 3/3

11:15 am-1:35 pm

1 stop31h 20m

$551

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 2/25

8:20 pm-3:25 pm

1 stop14h 05m

Porto

Thu 3/5

5:00 am-2:35 pm

1 stop14h 35m

$552

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Sun 3/22

4:50 pm-10:30 am

1 stop13h 40m

Porto

Wed 4/8

7:00 pm-12:45 pm

1 stop22h 45m

$558

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 4/8

6:00 pm-3:30 pm

1 stop16h 30m

Porto

Wed 4/15

7:00 pm-12:45 pm

1 stop22h 45m

$559

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 4/8

8:05 pm-3:30 pm

1 stop14h 25m

Porto

Tue 4/14

7:00 pm-12:45 pm

1 stop22h 45m

$560

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Wed 2/25

2:39 pm-1:15 pm

2 stops17h 36m

Porto

Wed 3/4

6:00 am-7:17 pm

2 stops18h 17m

$561

AtlantaPorto

ATL - OPO

ATLOPO

Atlanta Hartsfield-Jackson

Mon 2/16

3:50 pm-3:25 pm

1 stop18h 35m

Porto

Tue 2/24

5:00 am-8:17 pm

2 stops20h 17m

$562

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 $875 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

Fastest flight time

10h 51m

Direct flights

None
The fastest flight from Atlanta to Porto takes 10h 51m
There are no direct flights from Atlanta to Porto. There are no popular flight routes from Atlanta to Porto.
Search flight deals

  • How far is Atlanta Hartsfield-Jackson to Porto by plane?

    Atlanta Hartsfield-Jackson and Porto are 4052.2 mi apart from one another. 11h 50m 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
LufthansaPriceFrom $568Free CancellationRating
6.8
7,612 reviews
Search Lufthansa flights
KLMPriceFrom $573Free CancellationRating
7.7
1,430 reviews
Search KLM flights
United AirlinesPriceFrom $592Free CancellationRating
7.4
9,066 reviews
Search United Airlines flights
Turkish AirlinesPriceFrom $644Free CancellationRating
7.3
4,077 reviews
Search Turkish Airlines flights
DeltaPriceFrom $647Free CancellationRating
7.9
8,011 reviews
Search Delta flights
Air FrancePriceFrom $1,065Free CancellationRating
7.4
1,502 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
Braga
Aveiro
Matosinhos
Guimarães
Lamego
Esposende
Chaves
Viseu
Espinho
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.

An easier way to manage your Porto trip

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