What are the cheapest airlines flying from Detroit to Porto round-trip?

Flying on Delta is currently your cheapest option to Porto, with prices starting at $441. Additional round-trip tickets that might be worth considering are offered by KLM and Lufthansa, with the lowest prices starting at $528 and $547, respectively.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

What are the most popular airlines that fly from Detroit to Porto?

The most popular airlines flying from Detroit to Porto are United Airlines, Delta and Lufthansa. Something to consider prior to booking your flight.

What is the cheapest time of day to fly from DTT to OPO?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Detroit to Porto as you normally would.

Most accurate provider : When it comes to deals on Detroit-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Detroit-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Detroit-Porto flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Detroit-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 Detroit-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

How can I find direct flights from Detroit to Porto?

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

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

Yes. Cheapflights offers flight deals from Detroit 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.

Find Cheap Flights from Detroit to Porto

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Find flight deals from Detroit to Porto

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars

Provider with most accurate pricing for Detroit (DTT)-Porto flight deals.

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Provider most trusted by Cheapflights users for Detroit (DTT)-Porto flights.

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Compare providers for flights from Detroit to Porto

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Detroit to Porto in June.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust 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 Detroit-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Detroit-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Detroit-Porto flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Detroit-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 Detroit-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 Detroit to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Detroit with our price prediction graph.

DTT-OPO

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.

Reviews of airlines servicing Porto

See what other customers who have flown with United Airlines from Detroit to Porto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

9,804 reviews

Reviews

1 / 20

4.0

Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

United Airlines

7.4

Good

9,804 reviews

United Airlines

7.4

Good

9,804 reviews

Reviews

1 / 20

4.0

Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Related info for your journey

What are the cheapest airlines flying from Detroit to Porto round-trip?
Flying on Delta is currently your cheapest option to Porto, with prices starting at $441. Additional round-trip tickets that might be worth considering are offered by KLM and Lufthansa, with the lowest prices starting at $528 and $547, respectively.
Can I find deals for flights from Detroit to Porto that include hotel bookings?
Yes. In addition to deals on Detroit to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Detroit to Porto?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Detroit to Porto.
Can I find deals for business class flights from Detroit to Porto?
Yes. Cheapflights offers flight deals from Detroit 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.

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Top 4 airlines flying from Detroit to Porto

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$441	Average$958	FlexibilityNo cancel fee	On-timeN/A
KLM	Cheapest$528	Average$968	FlexibilityNo cancel fee	On-time75%
Lufthansa	Cheapest$547	Average$1,020	FlexibilityNo cancel fee	On-time76%
United Airlines	Cheapest$683	Average$839	FlexibilityNo cancel fee	On-time69%

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Cheap flights from Detroit (DTT) to Porto (OPO)

Find cheap flights from Detroit to Porto with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Detroit to Porto

Most accurate provider

Most trusted provider

Compare providers for flights from Detroit 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 Detroit to Porto in June.

Best time to book a flight from Detroit to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Detroit with our price prediction graph.

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated June 10, 2026.

See what other customers who have flown with United Airlines from Detroit to Porto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What are the cheapest airlines flying from Detroit to Porto round-trip?

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

How can I find direct flights from Detroit to Porto?

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

Traveling to a place near Porto?

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Alternative routes for Detroit to Porto

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Complete your trip

Complete your trip to Porto by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Detroit to Porto by cabin class

Find flights from Detroit to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Detroit and Porto flights

Browse other Detroit and Porto flight options. Last updated on June 10, 2026.

Other flights from Detroit

Browse through other flights departing from Detroit. Flights are based on user searches made on Cheapflights and were last updated on June 10, 2026.

Popular flight searches

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Other flights to Porto

Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 10, 2026.

Top 4 airlines flying from Detroit to Porto

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