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Cheap flights from Cincinnati to Porto from $275

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Cincinnati to Porto departing on 10/3. 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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Find the cheapest flights from Cincinnati to Porto

Cheap round-trip flights

United Airlines Logo
5:00 am - 8:30 amCVG-OPO
22h 30m2 stops
United Airlines Logo
6:00 am - 8:30 pmOPO-CVG
19h 30m2 stops
$595United Airlines
Find Deal
Sun, Nov 2 - Sun, Nov 9
United Airlines Logo
6:25 pm - 9:30 amCVG-OPO
11h 05m1 stop
United Airlines Logo
12:30 pm - 4:58 pmOPO-CVG
32h 28m2 stops
$596United Airlines
Find Deal
Sun, Mar 8 - Sun, Mar 15
United Airlines Logo
6:25 pm - 9:30 amCVG-OPO
11h 05m1 stop
United Airlines Logo
12:30 pm - 4:58 pmOPO-CVG
32h 28m2 stops
$597United Airlines
Find Deal
Sun, Mar 8 - Sun, Mar 15
United Airlines Logo
11:26 am - 9:30 amCVG-OPO
18h 04m2 stops
United Airlines Logo
12:30 pm - 4:58 pmOPO-CVG
32h 28m2 stops
$601United Airlines
Find Deal
Sun, Mar 8 - Sun, Mar 15
Delta Logo
6:30 pm - 3:30 pmCVG-OPO
16h 00m1 stop
Delta Logo
4:20 pm - 3:15 pmOPO-CVG
27h 55m1 stop
$685Delta
Find Deal
Tue, Sep 30 - Wed, Oct 15
Delta Logo
6:00 pm - 3:30 pmCVG-OPO
16h 30m2 stops
Delta Logo
4:20 pm - 3:15 pmOPO-CVG
27h 55m1 stop
$690Delta
Find Deal
Mon, Sep 29 - Wed, Oct 15
American Airlines Logo
12:26 pm - 7:35 amCVG-OPO
14h 09m2 stops
American Airlines Logo
8:15 am - 6:31 pmOPO-CVG
15h 16m2 stops
$718American Airlines
Find Deal
Wed, Oct 1 - Fri, Oct 10
KLM Logo
6:30 pm - 3:30 pmCVG-OPO
16h 00m1 stop
KLM Logo
6:15 am - 11:40 pmOPO-CVG
22h 25m2 stops
$762KLM
Find Deal
Thu, Oct 2 - Tue, Oct 14
Lufthansa Logo
7:41 pm - 10:45 pmCVG-OPO
22h 04m2 stops
Lufthansa Logo
6:00 am - 11:59 pmOPO-CVG
22h 59m2 stops
$792Lufthansa
Find Deal
Thu, Oct 2 - Tue, Oct 14
Lufthansa Logo
7:41 pm - 11:20 pmCVG-OPO
22h 39m2 stops
Lufthansa Logo
4:35 pm - 4:52 pmOPO-CVG
29h 17m2 stops
$847Lufthansa
Find Deal
Sun, Oct 5 - Mon, Oct 13

United Airlines flights from Cincinnati to Porto

Our best United Airlines deals on Cincinnati to Porto flight tickets
United Airlines
Nov 2
CVG5:00 amCincinnati Cinci./N. Kentucky
22h 30m
2 stops
OPO8:30 amPorto
Nov 9
OPO6:00 amPorto
19h 30m
2 stops
CVG8:30 pmCincinnati Cinci./N. Kentucky
$595
Find similar
United Airlines
Mar 8
CVG6:25 pmCincinnati Cinci./N. Kentucky
11h 05m
1 stop
OPO9:30 amPorto
Mar 15
OPO12:30 pmPorto
32h 28m
2 stops
CVG4:58 pmCincinnati Cinci./N. Kentucky
$596
Find similar
United Airlines
Mar 8
CVG6:25 pmCincinnati Cinci./N. Kentucky
11h 05m
1 stop
OPO9:30 amPorto
Mar 15
OPO12:30 pmPorto
32h 28m
2 stops
CVG4:58 pmCincinnati Cinci./N. Kentucky
$597
Find similar

Delta flights from Cincinnati to Porto

Our best Delta deals on Cincinnati to Porto flight tickets
Delta
Sep 30
CVG6:30 pmCincinnati Cinci./N. Kentucky
16h 00m
1 stop
OPO3:30 pmPorto
Oct 15
OPO4:20 pmPorto
27h 55m
1 stop
CVG3:15 pmCincinnati Cinci./N. Kentucky
$685
Find similar
Delta
Sep 29
CVG6:00 pmCincinnati Cinci./N. Kentucky
16h 30m
2 stops
OPO3:30 pmPorto
Oct 15
OPO4:20 pmPorto
27h 55m
1 stop
CVG3:15 pmCincinnati Cinci./N. Kentucky
$690
Find similar
Delta
Sep 29
CVG6:45 pmCincinnati Cinci./N. Kentucky
15h 45m
2 stops
OPO3:30 pmPorto
Oct 13
OPO4:20 pmPorto
32h 08m
2 stops
CVG7:28 pmCincinnati Cinci./N. Kentucky
$700
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Cincinnati 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 September 18, 2025.
Use the filters below to find and compare flights from Cincinnati to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CincinnatiPorto

CVG - OPO

CVGOPO

Cincinnati Cinci./N. Kentucky

Sun 11/2

5:00 am-8:30 am

2 stops22h 30m

Porto

Sun 11/9

6:00 am-8:30 pm

2 stops19h 30m

$595

CincinnatiPorto

CVG - OPO

CVGOPO

Cincinnati Cinci./N. Kentucky

Sun 3/8

6:25 pm-9:30 am

1 stop11h 05m

Porto

Sun 3/15

12:30 pm-4:58 pm

2 stops32h 28m

$596

CincinnatiPorto

CVG - OPO

CVGOPO

Cincinnati Cinci./N. Kentucky

Sun 3/8

6:25 pm-9:30 am

1 stop11h 05m

Porto

Sun 3/15

12:30 pm-4:58 pm

2 stops32h 28m

$597

CincinnatiPorto

CVG - OPO

CVGOPO

Cincinnati Cinci./N. Kentucky

Sun 3/8

11:26 am-9:30 am

2 stops18h 04m

Porto

Sun 3/15

12:30 pm-4:58 pm

2 stops32h 28m

$601

CincinnatiPorto

CVG - OPO

CVGOPO

Cincinnati Cinci./N. Kentucky

Tue 9/30

6:30 pm-3:30 pm

1 stop16h 00m

Porto

Wed 10/15

4:20 pm-3:15 pm

1 stop27h 55m

$685

CincinnatiPorto

CVG - OPO

CVGOPO

Cincinnati Cinci./N. Kentucky

Mon 9/29

6:00 pm-3:30 pm

2 stops16h 30m

Porto

Wed 10/15

4:20 pm-3:15 pm

1 stop27h 55m

$690

CincinnatiPorto

CVG - OPO

CVGOPO

Cincinnati Cinci./N. Kentucky

Wed 10/1

12:26 pm-7:35 am

2 stops14h 09m

Porto

Fri 10/10

8:15 am-6:31 pm

2 stops15h 16m

$718

CincinnatiPorto

CVG - OPO

CVGOPO

Cincinnati Cinci./N. Kentucky

Thu 10/2

6:30 pm-3:30 pm

1 stop16h 00m

Porto

Tue 10/14

6:15 am-11:40 pm

2 stops22h 25m

$762

CincinnatiPorto

CVG - OPO

CVGOPO

Cincinnati Cinci./N. Kentucky

Thu 10/2

7:41 pm-10:45 pm

2 stops22h 04m

Porto

Tue 10/14

6:00 am-11:59 pm

2 stops22h 59m

$792

CincinnatiPorto

CVG - OPO

CVGOPO

Cincinnati Cinci./N. Kentucky

Sun 10/5

7:41 pm-11:20 pm

2 stops22h 39m

Porto

Mon 10/13

4:35 pm-4:52 pm

2 stops29h 17m

$847

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 Cincinnati 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 November is, on average, the cheapest month to fly to Porto from Cincinnati, with most prices found around $680. If you aren’t able to travel during the month of November, then book flights to Porto from Cincinnati during January instead. Flights to Porto in January, while not as cheap as those in November, still average around $772.

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 Wednesday when prices can be found for as low as $918. 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 Monday because tickets tend to average around $1,497. 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 Cincinnati to Porto when you can find flight prices for as low as $884. 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 $1,155 on average. Flights to Porto from Cincinnati in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Can stopping save me money on Cincinnati to Porto flights?

You could potentially save up to 26% on your flight if you consider stops on a Cincinnati to Porto flight.

When to book flights from Cincinnati to Porto

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

Cheap Cincinnati to Porto (CVG to OPO) flight deals and tips

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

Direct flights

None
There are no direct flights from Cincinnati to Porto. There are no popular flight routes from Cincinnati to Porto.
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  • How far is Cincinnati Cinci./N. Kentucky to Porto by plane?

    There are 3874.2 mi between Cincinnati Cinci./N. Kentucky and Porto. In terms of flight time, this usually takes a little over 9h 53m.

  • When did momondo last update prices for flights from Cincinnati Cinci./N. Kentucky Airport to Porto Airport?

    Prices for flights from Cincinnati Cinci./N. Kentucky Airport to Porto Airport are updated daily.

  • How many operators does momondo search for flights from Cincinnati Cinci./N. Kentucky Airport to Porto Airport?

  • How old do you have to be to fly from Cincinnati Cinci./N. Kentucky Airport to Porto Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Cincinnati Cinci./N. Kentucky Airport to Porto Airport.

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

    The required travel and health documents for your Porto Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Porto Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

Best airlines flying from Cincinnati to Porto

Compare and see reviews for airlines that fly from Cincinnati to Porto with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $652Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
American AirlinesPriceFrom $783Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $824Free CancellationRating
7.9
7,964 reviews
Search Delta flights

Traveling to a place near Porto?

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

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Cincinnati to Porto. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Porto from Cincinnati which offer a flexible booking policy as well as other useful filters and features.

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

Once all potential Cincinnati to Porto flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are not ready to book a flight from Cincinnati to Porto now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Porto and let you know when they change.

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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