CVG - OPO

$333 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 11/1. 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

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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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, Nov 11 - Wed, Nov 19
United Airlines Logo
3:45 pm - 9:30 amCVG-OPO
12h 45m1 stop
United Airlines Logo
6:00 am - 6:00 pmOPO-CVG
41h 00m2 stops
$586United Airlines
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Tue, Nov 11 - Wed, Nov 19
 Logo
2:56 pm - 9:30 amCVG-OPO
13h 34m2 stops
 Logo
6:00 am - 5:41 pmOPO-CVG
16h 41m2 stops
Tue, Nov 11 - Wed, Nov 19
United Airlines Logo
6:20 pm - 9:30 amCVG-OPO
10h 10m1 stop
United Airlines Logo
12:35 pm - 9:07 pmOPO-CVG
13h 32m1 stop
$593United Airlines
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Mon, Sep 29 - Tue, Oct 7
Air Canada Logo
1:30 pm - 9:35 amCVG-OPO
15h 05m1 stop
Air Canada Logo
6:00 am - 8:27 pmOPO-CVG
19h 27m2 stops
$735Air Canada
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Mon, Sep 29 - Tue, Oct 7
Air Canada Logo
7:00 am - 9:35 amCVG-OPO
21h 35m2 stops
Air Canada Logo
6:00 am - 8:27 pmOPO-CVG
19h 27m2 stops
$740Air Canada
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Wed, Sep 24 - Wed, Oct 1
SWISS Logo
2:06 pm - 6:30 pmCVG-OPO
23h 24m2 stops
SWISS Logo
8:40 am - 8:46 pmOPO-CVG
17h 06m2 stops
$761SWISS
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Tue, Sep 30 - Tue, Oct 7
Delta Logo
6:30 pm - 3:30 pmCVG-OPO
16h 00m1 stop
Delta Logo
4:20 pm - 10:46 amOPO-CVG
23h 26m2 stops
$783Delta
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Tue, Sep 30 - Mon, Oct 6
Delta Logo
6:30 pm - 3:30 pmCVG-OPO
16h 00m1 stop
Delta Logo
4:20 pm - 3:15 pmOPO-CVG
27h 55m1 stop
$785Delta
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Wed, Oct 1 - Fri, Oct 10
KLM Logo
7:36 pm - 3:35 pmCVG-OPO
14h 59m2 stops
KLM Logo
9:20 am - 8:36 pmOPO-CVG
16h 16m2 stops
$818KLM
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Fri, Oct 3 - Mon, Oct 6
SWISS Logo
2:05 pm - 6:30 pmCVG-OPO
23h 25m2 stops
SWISS Logo
12:50 pm - 8:46 pmOPO-CVG
36h 56m2 stops
$842SWISS
Find Deal
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?

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Cincinnati 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 Cincinnati to Porto is November, where tickets cost $704 (return) on average. On the other hand, the most expensive months are February and June, where the average cost of round-trip tickets is $1,397 and $1,258 respectively.

Good to know

Low seasonFebruary
Cheapest flight$333
Best time to beat the crowds but there is an average 38% increase in price.
Most popular time to fly and prices are also 6% lower on average.
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 $333 for a one-way ticket and $586 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, Star Alliance, and oneworld are the airline alliances operating flights between Cincinnati and Porto, with Star Alliance being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from Cincinnati to Porto are Delta and KLM. With an average price for the route of $1,041 and an overall rating of 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $1,101 and an overall rating of 7.8.

  • 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 4 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.
8.0
DeltaOverall score based on 7981 reviews
7.9Entertainment
7.9Comfort
8.2Boarding
7.3Food
8.5Crew
Airline reviews

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

10.0 ExcellentLee, Aug 2025ATL - PHL
Read more Delta reviews

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

On this flight I felt the food offering was not as complete as on previous flights. The tomato salad was a bit off and there was nothing additional such a bread or butter. The breakfast was only one option, so you either ate what they had or ate nothing. The crew was efficient, but most seemed frustrated throughout the flight. The flight arrived early and was obstacle-free, so I’m overall quite happy, but the shine in the rest of the experience just wasn’t there.

The seats got pretty uncomfortable pretty fast. The armrests are bigger than on other planes, so I had less room in the actual seat. My butt hurt by the end of the flight. :/ comfort was the primary issue. The crew were fantastic!

I believe that a four-hour trip should have a meal. Delta had none.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

There was supposed to be a meal served, but there wasn’t and the major toilet was out of order

They made us board and then deboard due to mechanical issue which delayed the departure by almost 2 hours and we barely made our connecting flight. These quality checks should've been done before boarding not after.

Having to up charge for a seat assignment is not good. Delta can do better

Ad experience - been flying many years with them but they are losing out to other carriers with their service and bagage / seating policy. My 2 12-yo kids were not placed with the parent. Absurdity.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Klm start boarding while somw air issue in the plan

The service was great. However the lounge only gets passing grade

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

You should not have to pay for WiFi in business class

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

The flight was comfortable with the exit row and great service

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

Flight attendant in first class gave poor service (like he didn't want to be there) and food was awful. We sat waiting for gate upon arrival over 45 mins.

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

The service was good, the food could have been better.

Staff was rude. Didn’t give water for 2 hours. Worst service

Any flight to ORD after about 2pm this summer has been challenging. Flight was delayed getting in (coming from ORD) and that led to it not leaving before a ground stop due to lightening before they could fuel the plane, and so forth. They made up some time but we were still late in arriving at ORD, and that led to missed connections.

Food was ok, but not as good as I have had before on AA.

No issues. They did change our gate FOUR times in about 30 minutes which was mildly annoying but the flight was fine.

Great flight. No issues at all. I still think boarding could be more efficient but otherwise, a good experience.

Pretty good. The food was just mediocre, the boarding and crew were good.

The comfort of the seats was great, the crew eased my child’s anxieties and the fact that I had full cans of my beverage choice was great.

My flight got switched and my prepaid bag didnt transfer over properly so I paid to check ANOTHER BAG. I was placed in a middle seat and it was just miserable. At least it was a bulkhead row so I had legroom. The flight just never seem3d to end

4 hours late, including over +1 hour waiting in plane to take off. Baggage left behind too.

Sat on the ground in Cincinnati for 50 minutes before deplaning

While waiting to claim my checked luggage, I discovered the airline had lost it. After a long wait and inquiries, I discovered it was on another flight. Fortunately, the airline finally sent my luggage home.

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

Information on your arrival and departure airports

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