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Cheap flights from Dayton to Porto from $849

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Dayton to Porto departing on 8/18. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
10:20 am - 7:00 am
DAY
-
OPO
15h 40m
2 stops
United Airlines Logo
6:00 am - 9:47 am
OPO
-
DAY
32h 47m
2 stops
$849United Airlines
Tue, Aug 18 - Wed, Sep 2
United Airlines Logo
11:39 am - 6:55 am
DAY
-
OPO
14h 16m
2 stops
United Airlines Logo
12:35 pm - 10:23 pm
OPO
-
DAY
14h 48m
2 stops
$853United Airlines
Tue, Aug 18 - Wed, Sep 2
Delta Logo
6:46 pm - 10:05 pm
DAY
-
OPO
22h 19m
2 stops
Delta Logo
5:00 am - 11:32 pm
OPO
-
DAY
23h 32m
2 stops
$905Delta
Tue, May 12 - Tue, May 19
Lufthansa Logo
6:03 pm - 3:40 pm
DAY
-
OPO
40h 37m
2 stops
Lufthansa Logo
12:00 pm - 11:59 pm
OPO
-
DAY
16h 59m
2 stops
$1,490Lufthansa
Sat, May 16 - Wed, May 20
United Airlines Logo
6:03 pm - 3:40 pm
DAY
-
OPO
40h 37m
2 stops
United Airlines Logo
12:00 pm - 11:59 pm
OPO
-
DAY
16h 59m
2 stops
$1,491United Airlines
Sat, May 16 - Wed, May 20
Multiple Airlines Logo
3:17 pm - 3:25 pm
DAY
-
OPO
19h 08m
2 stops
Multiple Airlines Logo
5:00 am - 11:32 pm
OPO
-
DAY
23h 32m
2 stops
$1,529Multiple Airlines
Sat, May 16 - Wed, May 20

United Airlines flights from Dayton to Porto

Our best United Airlines deals on Dayton to Porto flight tickets
United Airlines
Aug 18
DAY10:20 amDayton
15h 40m
2 stops
OPO7:00 amPorto
Sep 2
OPO6:00 amPorto
32h 47m
2 stops
DAY9:47 amDayton
$849
United Airlines
Aug 18
DAY11:39 amDayton
14h 16m
2 stops
OPO6:55 amPorto
Sep 2
OPO12:35 pmPorto
14h 48m
2 stops
DAY10:23 pmDayton
$853
United Airlines
May 16
DAY6:03 pmDayton
40h 37m
2 stops
OPO3:40 pmPorto
May 20
OPO12:00 pmPorto
16h 59m
2 stops
DAY11:59 pmDayton
$1,491

momondo Fare Finder

 
Customize your flight search to find flights from Dayton 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 March 31, 2026.
Use the filters below to find and compare flights from Dayton to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Tue 8/18

10:20 am-7:00 am

2 stops15h 40m

Porto

Wed 9/2

6:00 am-9:47 am

2 stops32h 47m

$849
Quickest round-trip

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Tue 8/18

11:39 am-6:55 am

2 stops14h 16m

Porto

Wed 9/2

12:35 pm-10:23 pm

2 stops14h 48m

$853

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Tue 5/12

6:46 pm-10:05 pm

2 stops22h 19m

Porto

Tue 5/19

5:00 am-11:32 pm

2 stops23h 32m

$905

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Sat 5/16

6:03 pm-3:40 pm

2 stops40h 37m

Porto

Wed 5/20

12:00 pm-11:59 pm

2 stops16h 59m

$1,490

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Sat 5/16

6:03 pm-3:40 pm

2 stops40h 37m

Porto

Wed 5/20

12:00 pm-11:59 pm

2 stops16h 59m

$1,491

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Sat 5/16

3:17 pm-3:25 pm

2 stops19h 08m

Porto

Wed 5/20

5:00 am-11:32 pm

2 stops23h 32m

$1,529
Cheapest one-way
Quickest one-way

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Sun 6/14

11:23 am-10:25 am

2 stops18h 02m

$856

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Sun 6/14

5:55 am-6:55 am

3 stops20h 00m

$4,764

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Porto from

How to get the cheapest flight ticket from Dayton 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 airline that flies from Dayton to Porto?

KLM, Delta, and United Airlines are the most popular carriers operating from Dayton to Porto

What airlines fly to Porto?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Porto from Dayton according to our data. United Airlines is the first choice among our users, with 66% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 3 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

When to book flights from Dayton to Porto

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

Cheap Dayton to Porto (DAY to OPO) flight deals and tips

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

Fastest flight time

15h 40m

Direct flights

None
The fastest flight from Dayton to Porto takes 15h 40m
There are no direct flights from Dayton to Porto. There are no popular flight routes from Dayton to Porto.
Search flight deals

  • How far is Dayton to Porto by plane?

    Dayton and Porto are 3837.7 mi apart from one another. By plane, this route typically takes 15h 40m.

  • When did momondo last update prices for flights from Dayton Airport to Porto Airport?

    Prices for flights from Dayton Airport to Porto Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Dayton Airport to Porto Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Dayton 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.

Traveling to a place near Porto?

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

Why use momondo?

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

It is quick and easy to find Dayton 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 Dayton to Porto with flexible booking policies on momondo?

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

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Dayton to Porto.

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

Yes. momondo can track prices for Dayton to Porto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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