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Cheap flights from Dayton to Porto from $750

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 12/7. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Dayton to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:45 pm - 9:30 amDAY  Dayton-OPO Porto
14h 45m2 stops Chicago O'Hare Intl Newark
United Airlines Logo
6:00 am - 6:41 pmOPO  Porto-DAY Dayton
17h 41m2 stops Frankfurt am Main Washington, D.C. Dulles Intl
$750United Airlines
Mon, Dec 7 - Fri, Dec 11
Multiple Airlines Logo
2:50 pm - 11:25 pmDAY  Dayton-OPO Porto
27h 35m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss
Multiple Airlines Logo
4:50 pm - 7:01 pmOPO  Porto-DAY Dayton
31h 11m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl
$1,117Multiple Airlines
Sun, Sep 6 - Sat, Sep 12
Multiple Airlines Logo
2:50 pm - 11:55 pmDAY  Dayton-OPO Porto
28h 05m3 stops Washington, D.C. Dulles Intl Frankfurt am Main Nürnberg
Multiple Airlines Logo
8:10 pm - 7:01 pmOPO  Porto-DAY Dayton
27h 51m3 stops Madrid Barajas Frankfurt am Main Washington, D.C. Dulles Intl
$3,462Multiple Airlines
Sun, Sep 6 - Sat, Sep 12
Multiple Airlines Logo
6:15 pm - 10:55 pmDAY  Dayton-OPO Porto
23h 40m2 stops Chicago O'Hare Intl Frankfurt am Main
Multiple Airlines Logo
8:10 pm - 7:01 pmOPO  Porto-DAY Dayton
27h 51m3 stops Madrid Barajas Frankfurt am Main Washington, D.C. Dulles Intl
$3,600Multiple Airlines
Sun, Sep 6 - Sat, Sep 12

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United Airlines flights from Dayton to Porto

Our best United Airlines deals on Dayton to Porto flight tickets
United Airlines
Dec 7
DAY1:45 pmDayton
14h 45m
2 stops
OPO9:30 amPorto
Dec 11
OPO6:00 amPorto
17h 41m
2 stops
DAY6:41 pmDayton
$750
United Airlines
Sep 18
DAY7:48 pmDayton
30h 07m
2 stops
OPO6:55 amPorto
Sep 26
OPO12:05 pmPorto
50h 42m
2 stops
DAY9:47 amDayton
$1,251
United Airlines
Sep 18
DAY11:30 amDayton
14h 20m
2 stops
OPO6:50 amPorto
Sep 26
OPO7:00 amPorto
16h 58m
3 stops
DAY6:58 pmDayton
$1,960

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 August 11, 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
Quickest round-trip

DaytonPorto

DAY Dayton - OPO Porto

DAYOPO

Dayton

Mon 12/7

1:45 pm-9:30 am

2 stops14h 45m

Porto

Fri 12/11

6:00 am-6:41 pm

2 stops17h 41m

$750

DaytonPorto

DAY Dayton - OPO Porto

DAYOPO

Dayton

Sun 9/6

2:50 pm-11:25 pm

2 stops27h 35m

Porto

Sat 9/12

4:50 pm-7:01 pm

2 stops31h 11m

$1,117

DaytonPorto

DAY Dayton - OPO Porto

DAYOPO

Dayton

Sun 9/6

2:50 pm-11:55 pm

3 stops28h 05m

Porto

Sat 9/12

8:10 pm-7:01 pm

3 stops27h 51m

$3,462

DaytonPorto

DAY Dayton - OPO Porto

DAYOPO

Dayton

Sun 9/6

6:15 pm-10:55 pm

2 stops23h 40m

Porto

Sat 9/12

8:10 pm-7:01 pm

3 stops27h 51m

$3,600

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

14h 45m

Direct flights

None
The fastest flight from Dayton to Porto takes 14h 45m
There are no direct flights from Dayton to Porto. There are no popular flight routes from Dayton to Porto.
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Frequently asked questions about flying from Dayton to Porto

  • 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 14h 45m.

  • 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.

Frequently asked questions about flying from Dayton to Porto

  • How do I get Price Alerts for flights from Dayton to Porto?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Dayton from Porto. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Dayton to Porto with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Traveling to a place near Porto?

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