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$749+ Cheap flights from Dayton (DAY) to Porto (OPO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
DAY — OPO
Jul 28 — Aug 41
Tue 7/28
Tue 8/4
1 adult, Economy
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Cheap flight deals from Dayton to Porto

Cheapest flights from Dayton to Porto
Explore the most affordable flight options available from Dayton to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 28, 2026.

This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:45 pm
DAY
-
OPO
2 stops15h 45m
United Airlines
Thu 11/56:00 am
OPO
-
DAY
2 stops19h 31m
United Airlines
Deal found 6/27$749
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:30 am
DAY
-
OPO
2 stops24h 00m
United Airlines
Fri 11/66:00 am
OPO
-
DAY
2 stops36h 04m
United Airlines
Deal found 6/27$754
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:45 pm
DAY
-
OPO
2 stops15h 45m
United Airlines
Tue 11/1012:35 pm
OPO
-
DAY
2 stops27h 28m
United Airlines
Deal found 6/27$758
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:45 pm
DAY
-
OPO
2 stops33h 45m
United Airlines
Thu 11/56:00 am
OPO
-
DAY
2 stops19h 31m
United Airlines
Deal found 6/27$760
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:45 pm
DAY
-
OPO
2 stops33h 45m
United Airlines
Fri 11/66:00 am
OPO
-
DAY
2 stops34h 03m
United Airlines
Deal found 6/27$765
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:45 pm
DAY
-
OPO
2 stops33h 45m
United Airlines
Tue 11/1012:35 pm
OPO
-
DAY
2 stops16h 09m
United Airlines
Deal found 6/27$769
This Delta deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:44 pm
DAY
-
OPO
2 stops34h 51m
Delta
Tue 11/1011:30 am
OPO
-
DAY
2 stops40h 44m
Delta
Deal found 6/27$771
This Delta deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:44 pm
DAY
-
OPO
2 stops16h 41m
Delta
Sat 11/75:00 am
OPO
-
DAY
2 stops22h 02m
Delta
Deal found 6/27$804
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/291:45 pm
DAY
-
OPO
2 stops15h 45m
United Airlines
Wed 11/1112:35 pm
OPO
-
DAY
2 stops16h 09m
United Airlines
Deal found 6/27$808
This Delta deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:44 pm
DAY
-
OPO
2 stops46h 46m
Delta
Sat 11/75:00 am
OPO
-
DAY
2 stops22h 02m
Delta
Deal found 6/27$810
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/291:45 pm
DAY
-
OPO
2 stops18h 00m
United Airlines
Fri 11/66:00 am
OPO
-
DAY
2 stops34h 03m
United Airlines
Deal found 6/27$818
This Delta deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:44 pm
DAY
-
OPO
2 stops58h 21m
Delta
Sat 11/711:00 am
OPO
-
DAY
2 stops16h 02m
Delta
Deal found 6/27$819

Find flight deals from Dayton to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Dayton (DAY) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$749
(United Airlines)
Provider with most accurate pricing for Dayton-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Dayton-Porto flights.
Search Deals
From Dayton to Porto
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated June 28, 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 - OPO

DAYOPO

Dayton

Thu 10/29

1:45 pm-9:30 am

2 stops15h 45m

Porto

Wed 11/11

12:35 pm-11:44 pm

2 stops16h 09m

$808

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Sun 11/1

11:23 am-9:05 am

2 stops16h 42m

Porto

Mon 11/9

11:00 am-11:14 pm

2 stops17h 14m

$808

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Tue 10/27

1:45 pm-9:30 am

2 stops15h 45m

Porto

Mon 11/9

12:35 pm-11:44 pm

2 stops16h 09m

$808

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Thu 10/29

1:45 pm-9:30 am

2 stops15h 45m

Porto

Tue 11/10

12:35 pm-11:44 pm

2 stops16h 09m

$808

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Thu 10/29

1:45 pm-9:30 am

2 stops15h 45m

Porto

Thu 11/5

12:35 pm-11:44 pm

2 stops16h 09m

$808

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Fri 10/30

6:44 pm-9:05 am

2 stops58h 21m

Porto

Sat 11/7

11:00 am-10:02 pm

2 stops16h 02m

$819

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Tue 8/18

7:15 am-7:00 am

2 stops18h 45m

Porto

Wed 9/2

11:20 am-10:58 am

2 stops28h 38m

$891

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Tue 8/18

2:23 pm-9:45 am

2 stops14h 22m

Porto

Wed 9/2

11:20 am-10:58 am

2 stops28h 38m

$892

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Tue 8/11

11:33 am-7:00 am

2 stops14h 27m

Porto

Tue 8/18

12:15 pm-10:58 am

2 stops27h 43m

$958

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/27

Sorted by cheapest first

Compare providers for flights from Dayton to Porto

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dayton to Porto in June.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Dayton-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Dayton-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Dayton-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Dayton-Porto flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Dayton-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dayton to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Dayton with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Dayton to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Dayton to Porto?

    For as low as $808, United Airlines can have you in Porto from Dayton in 15h 45m. The distance from Dayton to Porto is about 3829 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Dayton to Porto that include hotel bookings?

    Yes. In addition to deals on Dayton to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dayton to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dayton to Porto.

  • Can I find deals for business class flights from Dayton to Porto?

    Yes. Cheapflights offers flight deals from Dayton to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

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