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$518+ Cheap flights from Dayton (DAY) to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/14. Fares are subject to change and may not be available on all flights or dates of travel.
DAY — OPO
Mar 15 — Mar 221
Sun 3/15
Sun 3/22
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 February 13, 2026.

This Iberia deal was found by Cheapflights users on 2/12. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:43 pm
DAY
-
OPO
2 stops26h 17m
Iberia
Wed 9/24:40 pm
OPO
-
DAY
2 stops34h 07m
Iberia
Deal found 2/12$645
This KLM deal was found by Cheapflights users on 2/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:05 am
DAY
-
OPO
2 stops18h 25m
KLM
Wed 9/25:55 am
OPO
-
DAY
2 stops22h 20m
KLM
Deal found 2/10$664
This United Airlines deal was found by Cheapflights users on 2/12. 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 2/279:45 am
DAY
-
OPO
2 stops18h 45m
United Airlines
Tue 3/312:35 pm
OPO
-
DAY
2 stops16h 08m
United Airlines
Deal found 2/12$697
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:28 am
DAY
-
OPO
2 stops31h 57m
Lufthansa
Thu 5/286:20 am
OPO
-
DAY
2 stops21h 03m
Lufthansa
Deal found 2/10$875
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:28 am
DAY
-
OPO
2 stops31h 57m
Lufthansa
Wed 5/276:00 am
OPO
-
DAY
2 stops22h 44m
Lufthansa
Deal found 2/10$876
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:28 am
DAY
-
OPO
2 stops31h 57m
Lufthansa
Fri 5/2912:05 pm
OPO
-
DAY
2 stops39h 18m
Lufthansa
Deal found 2/10$882
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:28 am
DAY
-
OPO
2 stops31h 57m
Lufthansa
Mon 6/16:20 am
OPO
-
DAY
2 stops39h 52m
Lufthansa
Deal found 2/10$886
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:28 am
DAY
-
OPO
2 stops31h 57m
Lufthansa
Sat 5/306:00 am
OPO
-
DAY
2 stops17h 41m
Lufthansa
Deal found 2/10$946
This United Airlines deal was found by Cheapflights users on 2/9. 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 5/1910:28 am
DAY
-
OPO
2 stops24h 17m
United Airlines
Sun 5/316:00 am
OPO
-
DAY
2 stops22h 44m
United Airlines
Deal found 2/9$960
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/172:55 pm
DAY
-
OPO
2 stops27h 00m
Lufthansa
Thu 5/286:20 am
OPO
-
DAY
2 stops22h 24m
Lufthansa
Deal found 2/10$989

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 February 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$717
(United Airlines)

One-way from

$518
(KLM)
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
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One-way flight from Dayton to Porto
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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 February 13, 2026.
Use the filters below to find and compare flights from Dayton to Porto that are best for you.

Fly from

Dayton

Fly to

Porto

Route

Depart

Return

Price

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Fri 2/27

9:45 am-9:30 am

2 stops18h 45m

Porto

Tue 3/3

12:35 pm-11:43 pm

2 stops16h 08m

$697

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Tue 5/19

10:28 am-3:45 pm

2 stops24h 17m

Porto

Sun 5/31

6:00 am-11:44 pm

2 stops22h 44m

$960

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Sun 5/17

2:55 pm-10:55 pm

2 stops27h 00m

Porto

Thu 5/28

6:20 am-11:44 pm

2 stops22h 24m

$989

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Mon 5/18

2:55 pm-10:50 pm

2 stops26h 55m

Porto

Tue 6/2

6:20 am-10:23 pm

2 stops21h 03m

$989

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Sun 5/17

10:28 am-10:55 pm

2 stops31h 27m

Porto

Fri 5/29

6:00 am-10:23 pm

2 stops45h 23m

$996

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Mon 5/18

2:55 pm-10:50 pm

2 stops26h 55m

Porto

Mon 6/1

11:05 am-11:44 pm

2 stops41h 39m

$999

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Tue 5/19

10:28 am-11:25 pm

2 stops31h 57m

Porto

Sun 5/31

6:00 am-11:44 pm

2 stops22h 44m

$1,025

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Tue 2/24

11:42 am-10:30 am

2 stops17h 48m

Porto

Fri 2/27

5:00 am-10:43 pm

2 stops22h 43m

$1,077

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Wed 5/20

10:28 am-9:20 am

2 stops41h 52m

Porto

Tue 6/2

1:30 pm-6:41 pm

2 stops34h 11m

$1,078

DaytonPorto

DAY - OPO

DAYOPO

Dayton

Sun 6/14

11:05 am-10:30 am

2 stops18h 25m

$518

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/11

Showing 1-10 of 13 results
1
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  • 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.

Cheapflights Insights

Everything you need to know about your flight from Dayton to Porto

What is the cheapest month to book a flight from Dayton to Porto?

Currently, February is the cheapest month in which you can book a flight from Dayton to Porto (average of $491). Flying from Dayton to Porto in December is currently the most expensive (average of $1,102). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 $697, United Airlines can have you in Porto from Dayton in 18h 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.

  • What is the cheapest month to book a flight from Dayton to Porto?

    Currently, February is the cheapest month in which you can book a flight from Dayton to Porto (average of $491). Flying from Dayton to Porto in December is currently the most expensive (average of $1,102). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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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