CVG - OPO

$461 Find Cheap Flights from Cincinnati 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 Cincinnati to Porto departing on 5/6. 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 Cincinnati to Porto, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Cincinnati to Porto, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$857
Typical prices: $1,128-$873
American Airlines
Tue 8/18Wed 9/2
CVG - OPO • 2 stops
Cheapest one-way
$461
Multiple Airlines
Wed 5/6
CVG - OPO • 3 stops
Top airlines
Cheapest • from $857 (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 Cincinnati and Porto. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $916 (round-trip)
Shortest trip • 11h 09m (one-way)
Insights
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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 Cincinnati to Porto (CVG-OPO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Cincinnati 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 Cincinnati to Porto

Tue, Aug 18 - Wed, Sep 2
American Airlines Logo
2:59 pm - 11:45 am
CVG
-
OPO
15h 46m
2 stops
American Airlines Logo
12:25 pm - 12:59 am
OPO
-
CVG
17h 34m
2 stops
$857American Airlines
Tue, Aug 18 - Wed, Sep 2
United Airlines Logo
1:55 pm - 7:00 am
CVG
-
OPO
12h 05m
1 stop
United Airlines Logo
12:45 pm - 8:42 pm
OPO
-
CVG
36h 57m
2 stops
$877United Airlines
Tue, Aug 18 - Wed, Sep 2
United Airlines Logo
1:55 pm - 7:00 am
CVG
-
OPO
12h 05m
1 stop
United Airlines Logo
12:45 pm - 8:30 pm
OPO
-
CVG
36h 45m
2 stops
$878United Airlines
Tue, Aug 18 - Wed, Sep 2
United Airlines Logo
1:55 pm - 7:00 am
CVG
-
OPO
12h 05m
1 stop
United Airlines Logo
12:45 pm - 8:30 pm
OPO
-
CVG
12h 45m
1 stop
$891United Airlines
Tue, Aug 18 - Wed, Sep 2
United Airlines Logo
2:54 pm - 9:45 am
CVG
-
OPO
13h 51m
2 stops
United Airlines Logo
12:35 pm - 11:57 pm
OPO
-
CVG
16h 22m
2 stops
$903United Airlines
Fri, Sep 25 - Sat, Oct 3
Iberia Logo
12:27 pm - 7:40 am
CVG
-
OPO
14h 13m
2 stops
Iberia Logo
4:40 pm - 7:35 pm
OPO
-
CVG
31h 55m
2 stops
$984Iberia
Sat, Sep 19 - Mon, Sep 28
Iberia Logo
3:38 pm - 11:45 am
CVG
-
OPO
15h 07m
2 stops
Iberia Logo
8:40 pm - 9:05 pm
OPO
-
CVG
29h 25m
2 stops
$1,008Iberia
Sat, Sep 19 - Mon, Sep 28
Multiple Airlines Logo
11:00 am - 10:20 am
CVG
-
OPO
18h 20m
1 stop
Multiple Airlines Logo
4:25 pm - 3:11 pm
OPO
-
CVG
27h 46m
1 stop
$1,011Multiple Airlines
Sat, Sep 19 - Mon, Sep 28
Multiple Airlines Logo
2:20 pm - 10:20 am
CVG
-
OPO
15h 00m
2 stops
Multiple Airlines Logo
4:25 pm - 3:11 pm
OPO
-
CVG
27h 46m
1 stop
$1,016Multiple Airlines
Tue, May 19 - Sun, May 24
Delta Logo
7:52 pm - 6:20 pm
CVG
-
OPO
17h 28m
2 stops
Delta Logo
5:55 am - 3:05 pm
OPO
-
CVG
14h 10m
1 stop
$1,018Delta
Booking Insights

KAYAK's insights & trends for Cincinnati to Porto flights

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

How much is a round-trip flight from Cincinnati to Porto?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Cincinnati to Porto departing in August.

Good to know

Low seasonApril
Cheapest flight$461
Best time to beat the crowds with an average 38% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Cincinnati to Porto

When to book flights from Cincinnati to Porto

Are your dates flexible? Find out the best times to travel from Cincinnati 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 Cincinnati to Porto

  • What is the cheapest flight from Cincinnati to Porto?

    In the last 3 days, the lowest price for a flight from Cincinnati to Porto was $461 for a one-way ticket and $857 for a round-trip.

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

    Yes

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

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

  • Which airline alliances offer flights from Cincinnati to Porto?

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

  • Which is the best airline for flights from Cincinnati to Porto, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Cincinnati to Porto are Delta and United Airlines. With an average price for the route of $1,041 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $926 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Cincinnati 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 Cincinnati to Porto.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Cincinnati 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 Cincinnati 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 Cincinnati with another airline. Booking your flights between Cincinnati 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 Cincinnati 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 Cincinnati up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Cincinnati to Porto

 
See real verified KAYAK customer reviews for airlines flying from Cincinnati 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 Cincinnati 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 8409 reviews
7.9Comfort
7.8Entertainment
8.5Crew
8.1Boarding
7.2Food
Airline reviews

Boarding was good. The flight was on time ( arrival was 20 minutes early). Inflight service was average ( US airlines have not mastered the skills of customer service yet). The food was mediocre. “ breakfast “ was downright awful and insulting. It was a piece of dough with mon descript filling that was supposed to be cheese omelette).

6.0 GoodAnonymous, Apr 2026
DTW - AMS
Read more Delta reviews

Boarding was good. The flight was on time ( arrival was 20 minutes early). Inflight service was average ( US airlines have not mastered the skills of customer service yet). The food was mediocre. “ breakfast “ was downright awful and insulting. It was a piece of dough with mon descript filling that was supposed to be cheese omelette).

The tray table was broken and the food was terrible.

The gentleman at the gate I think his name is RIE was exceptional

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

No entertainment. Plane was so small had to pink tag a carry on ive used for 20 years easily on board. The fact the flight got in at midnight, had to wait for crew in fort wayne to allow the plane to approach the gate, THEN had to wait for bag on jet bridge made experience irritating at best.

Crew was great. Near on time departure and early arrival. Snacks are always meh. Not a fan of the "pay for everything including miles " proposal unless base flight rate going to be 100 bucks.

Would have been better if there was a nonstop flight from Tampa to Norfolk or Tampa to New Port News.

Overall Good! The weather delayed our takeoff from Atlanta and our arrival in Miami! If Mother Nature can mess up a flight she will do it every time!

The flight was smooth, the crew was great but the plane was quite old

Crew was friendly. Seats are too narrow, particularly when a big person is in the adjacent seat, but I understand this is due to smaller planes usually flight into Lincoln. I have experienced several flight delays going out and coming into Lincoln airport, I say maybe 50% or higher of the flights I've taken out of this airport have been delayed.

newer aircraft, ability to connect my headset via blue tooth for entertainment.

Great flight. Boarded efficiently. Arrived early at CLT. There was no in flight entertainment on this aircraft. Great crew.

Due to cancellation of connecting flight (Lufthansa) I didn’t fly with United

The seat was comfortable. There was a lot of turbulence. If it weren't for that,it would have been okay.

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Packed in plane small uncomfortable seats elbow to elbow nobody wants to be in that situation for the money they paid

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

Overall flight was ok. Flight attendant was receptive to assisting passengers with tight connections.

The "on the ground" A/C was not working. It was so hot while waiting to get in the air, a passenger from the rear of the plan declared "I just can't!" and waited in the gangway until time to close the doors. It was miserable. But the crew were champs and had an amazing attitude. I know they were as miserable as we were but didn't let that affect their performance.

The captain announced to the cabin there would be a delay because they observed a "cut" on a tire during precheck that needed to be cleared by maintenance. We were delayed during this inspection and allowed to proceed after maintenance "measured the cut and decided it was acceptable". My complaint is not about the delay or due diligence. I wish the captain had been more generic when making his announcement. I was a nervous wreck all the way to Charlotte worried that we would have a blowout when landing!

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

Very good I can’t complain one bit. Thank you American Airlines for making my flight enjoyable and safe!

American Airlines is a miserable experience. It is predictably miserable, in the sense that every time I fly American, I brace myself for the certainty that it will be unpleasant and uncomfortable. But it is unpredictable in the sense that I never know if the flight will be on time or delayed nine hours (both happened to me this week). I never know if I will be able to sit in the seat that I selected when I purchased the ticket or if I will be told by Customer Service (!!!) that I must relocate from first class to a seat in the back of the aircraft with no explanation (both happened to me this week). Will the food be frozen and half defrosted, or scalding hot? Will the drinks be warm? Will the flight attendants be surly and mean? Will the toilets be cramped and foul? Will the seats be narrow and uncomfortable? Will there be a real electric outlet at the seat, or just an unreliable USB-2 port? Will there be enough seats in the boarding lounge or just a few? Will the boarding process be smooth and efficient, or will the gate agents mess it up and delay it needlessly for 30 or 40 minutes? Will the catering and cleaning crew be prompt or will they take an extra 30 minutes? Will the brakes on the aircraft work properly, or will the pilot delay takeoff for four hours while the ground crew attends to what can only be described as routine maintenance that should have been done the night before? I've eexperienced every one of these unpleasant things this year, 2026. The only thing I can reliably count on is that American will find a new way to make the experience of flying as miserable as they possibly can.

Flight was fine, but not having WiFi was a major negative

Friendly crew is the only nice thing. Seats uncomfortable. Food and snacks horrible. Movies were the same as the first 10 hour flight two weeks before

When I booked my flight a month ago - I selected a seat. That seat was NOT the one I ended up with when I checked into my flight the day before. This is the second time this has occurred. So, I checked my next flight on Wednesday and Thursday and no seat was assigned. Poor, very poor customer service.

The staff and service on American Airlines were truly outstanding. I had requested wheelchair assistance for my mother due to her knee issues, and the team went above and beyond every step of the way—from boarding in Boston to our arrival in Chicago. Their care, professionalism, and attentiveness made the entire experience smooth and stress-free. I’m very grateful for the support they provided.

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

Information on your arrival and departure airports