ATL - OPO

$296 Find Cheap Flights from Atlanta to Porto

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Atlanta to Porto departing on 3/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Atlanta to Porto.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Atlanta to Porto.
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$639
Overall average: $761
Scandinavian Airlines
Thu 4/9Sat 4/18
ATL - OPO • 1 stop
Cheapest one-way
$296
Typical prices: $538-$544
Multiple Airlines
Mon 3/23
ATL - OPO • 3 stops
Top airlines
Cheapest • from $639 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Atlanta and Porto. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $423 (round-trip)
Shortest trip • 10h 45m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 38% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 29% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Atlanta to Porto (ATL-OPO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Atlanta to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Atlanta to Porto

Thu, Apr 9 - Sat, Apr 18
Scandinavian Airlines Logo
7:25 pm - 8:45 am
ATL
-
OPO
32h 20m
1 stop
Scandinavian Airlines Logo
9:35 am - 5:25 pm
OPO
-
ATL
36h 50m
1 stop
$639Scandinavian Airlines
Thu, Apr 16 - Thu, Apr 23
Turkish Airlines Logo
9:50 pm - 3:40 pm
ATL
-
OPO
36h 50m
1 stop
Turkish Airlines Logo
4:40 pm - 7:45 pm
OPO
-
ATL
32h 05m
1 stop
$648Turkish Airlines
Wed, Apr 8 - Wed, Apr 15
Turkish Airlines Logo
9:50 pm - 3:45 pm
ATL
-
OPO
36h 55m
1 stop
Turkish Airlines Logo
10:45 am - 7:45 pm
OPO
-
ATL
38h 00m
1 stop
$649Turkish Airlines
Sun, Apr 5 - Mon, May 4
Turkish Airlines Logo
9:50 pm - 9:40 am
ATL
-
OPO
30h 50m
1 stop
Turkish Airlines Logo
6:30 am - 7:45 pm
OPO
-
ATL
18h 15m
1 stop
$650Turkish Airlines
Sun, Apr 5 - Mon, May 4
Turkish Airlines Logo
9:50 pm - 9:40 am
ATL
-
OPO
30h 50m
1 stop
Turkish Airlines Logo
6:30 am - 1:00 pm
OPO
-
ATL
35h 30m
1 stop
$651Turkish Airlines
Wed, Apr 8 - Fri, Apr 17
Turkish Airlines Logo
9:50 pm - 9:40 am
ATL
-
OPO
30h 50m
1 stop
Turkish Airlines Logo
4:45 pm - 1:00 pm
OPO
-
ATL
25h 15m
1 stop
$657Turkish Airlines
Wed, Apr 8 - Wed, Apr 15
Turkish Airlines Logo
9:50 pm - 9:40 am
ATL
-
OPO
30h 50m
1 stop
Turkish Airlines Logo
10:45 am - 7:45 pm
OPO
-
ATL
38h 00m
1 stop
$664Turkish Airlines
Sun, Sep 6 - Tue, Oct 6
Turkish Airlines Logo
3:05 pm - 9:40 am
ATL
-
OPO
37h 35m
1 stop
Turkish Airlines Logo
10:40 am - 7:45 pm
OPO
-
ATL
38h 05m
1 stop
$673Turkish Airlines
Wed, Apr 22 - Wed, Apr 29
Turkish Airlines Logo
9:50 pm - 9:40 am
ATL
-
OPO
30h 50m
1 stop
Turkish Airlines Logo
10:45 am - 7:45 pm
OPO
-
ATL
38h 00m
1 stop
$681Turkish Airlines
Mon, Sep 7 - Thu, Sep 17
Turkish Airlines Logo
9:50 pm - 3:40 pm
ATL
-
OPO
36h 50m
1 stop
Turkish Airlines Logo
6:10 am - 7:45 pm
OPO
-
ATL
18h 35m
1 stop
$682Turkish Airlines
Booking Insights

KAYAK's insights & trends for Atlanta to Porto flights

Get data-powered insights and trends into flights from Atlanta to Porto to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Atlanta to Porto, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Atlanta to Porto is March, where tickets cost $582 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,194 and $1,064 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Atlanta to Porto, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Atlanta to Porto, you should book around 2 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$296
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from Atlanta to Porto

When to book flights from Atlanta to Porto

Are your dates flexible? Find out the best times to travel from Atlanta to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Atlanta to Porto

  • What is the cheapest flight from Atlanta to Porto?

    In the last 3 days, the lowest price for a flight from Atlanta to Porto was $296 for a one-way ticket and $639 for a round-trip.

  • Do I need a passport to fly between Atlanta and Porto?

    Yes, you’ll need a passport to travel to Porto from Atlanta.

  • Which aircraft models fly most regularly from Atlanta to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Atlanta to Porto?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Atlanta and Porto, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Atlanta to Porto, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Atlanta to Porto are Delta and KLM. With an average price for the route of $968 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $953 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Atlanta to Porto?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Atlanta to Porto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Atlanta to Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Atlanta is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Atlanta to Porto?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to Atlanta with another airline. Booking your flights between Atlanta and OPO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Atlanta to Porto?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from Atlanta up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Atlanta to Porto

 
See real verified KAYAK customer reviews for airlines flying from Atlanta to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Atlanta to Porto? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8312 reviews
7.8Entertainment
7.2Food
8.1Boarding
8.5Crew
7.9Comfort
Airline reviews

Mechanical Delay of over an hour with multiple gate changes. Entertainment system down for rejuvenation.

6.0 GoodCarl, Mar 2026
ATL - ATW
Read more Delta reviews

Mechanical Delay of over an hour with multiple gate changes. Entertainment system down for rejuvenation.

This was a Latam operated flight. Seats seemed a bit narrow in business class. Older aircraft.

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Same experience as the flight from Norfolk to Atlanta where people are boarded in zones that don't make sense. People behind you on the plane will get on before you and they take the luggage space on your row.

I was happy that I was able to get a last minute flight but unfortunately my seat was a middle seat. Even with Delta Comfort I wasn't comfortable

two hour delay and the Delta representative on the PA system was unable to understand

We waited an hour on the runway to get a gate in Orlando

The staff on board and gate was nice - a welcome change from the usual. We also arrived early, which was a great benefit, given that it takes 30 minutes plus to get bags at SRQ.

Never got on it. Was re-routed through Detroit and am still in airports 12 hours later waiting for my connecting plane to arrive.

The landing was the worst I’ve experienced with a flight.

It was really nice journey i personally recommend klm flight

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

Empty seats next to me - wish it had been for a longer flight!!

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Terrible last row seats many seats available but no offer to move to better seat

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Couldn’t get boarding pass in SLC even with help from a redcoat, so had to find a desk in AMS to get boarding pass. Technical problems so not sure why. Very inconvenient. The KLM app is not as user friendly as most apps. Also had to wait almost an hour on the tarmac for a fuel truck, which caused us to miss a connecting bus in LUX.

They lost my bag and I still haven’t received it yet

Communication on the delay, rebooking and how to get a hotel was poor. Mails, airport check-in and transfer desk said different things.

Not consistent with the food quality (I mean taste not freshness)

Food was really mediocre for premium economy in comparison to other airlines… the crew was nowhere to be found… 14 hour flight…

Worst airlines either. First leg was delayed because of crew not available. My connection was missed so they booked me automatically the next day! But, impossible to get anyone on site, web site does not let me access my reservation anymore, confirmed by useless agents over the phone. My 2-leg trip with part in business class arriving at 4:10pm ends up in an awful 3-leg arriving at 9pm the next day with no way to even choose the seats and of course at the very end of the plane. I can understand problems arrive but the way Air France handle it is just unacceptable. You are on your own. Apparently getting you to your destination is the only thing they consider their duty. The customer experience and fatigue is none of their concern. And I have a status with them. I will reconsider my priorities when flying with Air France and encourage everyone to do the same.

Our flight crew were terrific. And they handle a difficult passenger with finesse.

I don't understand the concept of paying to get your personal luggage onboard and then asked to check it in.... either sell the space or don't, its a hassle to carry those all through the airport just to make a check in at the last minute.

The food was great and the service and attitude was amazing!!

It was a great experience. The only thing I would have changed was that the bathrooms were never cleaned and they got very dirty.

Old airplanes small seats expensive tickets, not as expected overall and not comfortable according to the price

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

Experience was great - no complaints. Took off on time, landed early. Got to the gate relatively quickly - took a little bit of extra time to deplane but nothing excessive.

Business class seats felt very cramped compared to other airlines.

Economy plus was so cramped I could not use my laptop. It was beyond bad.

OK, we were delayed and had to de plane and reboard.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Both my flight where delayed Had 25min to make it to my transfer flight

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

IAH to Istanbul was outstanding across the board. The flight from Istanbul to Male was good, not great.

the cabin was kept too hot. couldn't sleep as a result

It was an amazing experience. Flight crew's service, hospitality, and the food were phenomenal. I don't think I'd want to try any other airline company after this. I would definitely recommend to friends and family. Thank you Turkish Airlines !

Business Class pods are horrible. If you're petite, you might be able to sleep on the uncomfortable seat and bed. Crew and food are fantastic.

I have travelled many times on Turkish, but they always board at least 30-40 minutes past the stated time. If informed properly, passengers can choose to spend more time in the .lounge instead of standing around by the gate waiting to board. The new lounge at DFW was a big disappointment. The aircraft itself was a shock. In the past I have flown this sector with regular business class seating configuration of 1-2-1, The 2-3-2 seating is very disappointing after paying such high prices for tickets. The DFW to Istanbul segment was slightly better, but the Istanbul to Delhi segment was no better than premium economy. I will try to travel more on airlines which give business class passengers more value for their money.

Good overall. Seat spacing a bit tight between IST and ISB.

Excellent staff despite some trying passenger situations. Very impressed with their good attitudes and kindness.

Crew were unfriendly, touch screen for movies didn't work very well, seats were tight and uncomfortable

After arriving in Istanbul, the transit information on the electronic board showed a tight departure time, and the gate changed in the middle, making it difficult to make it on time.

Typically good service onboard but baggage delay in airport was significant

Everything you need to know for your flight from Atlanta to Porto

Information on your arrival and departure airports