HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$750+ 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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
DAY — OPO
Sep 11 — Sep 181
Fri 9/11
Fri 9/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dayton to Porto with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 August 12, 2026.

This United Airlines deal was found by Cheapflights users on 8/10. 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.
Mon 12/71:45 pm -
2 stops14h 45m
Fri 12/116:00 am -
2 stops17h 41m
Deal found 8/10$750
This Air Canada deal was found by Cheapflights users on 8/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:00 am -
2 stops20h 00m
Wed 9/211:20 am -
2 stops28h 38m
Deal found 8/11$1,000
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Fri 9/187:48 pm -
2 stops30h 07m
Sat 9/2612:05 pm -
2 stops50h 42m
Deal found 8/11$1,251
This FlightHub deal was found by Cheapflights users on 8/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/187:09 pm -
2 stops44h 31m
Sat 9/267:55 pm -
2 stops27h 44m
Deal found 8/11$1,283
This Mytrip deal was found by Cheapflights users on 8/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1810:22 am -
3 stops26h 38m
Sat 9/266:00 pm -
3 stops34h 58m
Deal found 8/11$2,265

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 August 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$750
(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 August 12, 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

Tue 12/8

1:45 pm-9:30 am

2 stops14h 45m

Porto

Fri 12/11

6:00 am-11:44 pm

2 stops22h 44m

$750

DaytonPorto

DAY Dayton - OPO Porto

DAYOPO

Dayton

Fri 9/18

7:48 pm-6:55 am

2 stops30h 07m

Porto

Sat 9/26

12:05 pm-9:47 am

2 stops50h 42m

$1,251

DaytonPorto

DAY Dayton - OPO Porto

DAYOPO

Dayton

Fri 9/18

7:09 pm-8:40 pm

2 stops44h 31m

Porto

Sat 9/26

7:55 pm-6:39 pm

2 stops27h 44m

$1,283

DaytonPorto

DAY Dayton - OPO Porto

DAYOPO

Dayton

Fri 9/18

10:22 am-6:00 pm

3 stops26h 38m

Porto

Sat 9/26

6:00 pm-11:58 pm

3 stops34h 58m

$2,265

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/7

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 August.
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 $750, United Airlines can have you in Porto from Dayton in 14h 45m. The distance from Dayton to Porto is about 3829 mi.

  • 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
Arcos de Valdevez
Coimbra
Aveiro

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.