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 United Airlines, with the lowest prices starting at $568 and $739, respectively. Delta is 58% cheaper than the average price of flights available within the next 90 days to this destination.

What is the cheapest day to fly from Detroit to Porto?

Travelers seeking maximum savings on their Detroit to Porto flight should consider departing on Saturday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 Delta, KLM and United Airlines. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Detroit to Porto?

Users have found that flying from Detroit to Porto on a Wednesday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

What is the cheapest month to fly from Detroit to Porto?

January can be a great time to fly to Porto from Detroit with a flight ticket averaging about $1,063. Cheapflights users have found deals in the month of January for as cheap as $598. The most expensive prices can be found in the month of April.

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

It’s optimal to fly from Detroit to Porto at noon. By choosing this option you can save up to 9% on the cost of your flight, compared to a flight in the morning.

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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Cheap flight deals from Detroit to Porto

Popular in	April
Cheapest in	January
Average price	$985

Highest demand for flights based on searches. 24% potential increase in price ($347 potential increase over avg. RT price).

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Cheapest flight prices on average. 8% potential price decrease ($79 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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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.

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 Detroit to Porto

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

Currently, January is the cheapest month in which you can book a flight from Detroit to Porto (average of $523). Flying from Detroit to Porto in June is currently the most expensive (average of $1,027). 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.

Reviews of airlines servicing Porto

See what other customers who have flown with Delta, KLM, and 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.

Delta

8.0

Very good

7,960 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,960 reviews

Delta

8.0

Very good

7,960 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,385 reviews

Delta

8.0

Very good

7,960 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,937 reviews

Delta

8.0

Very good

7,960 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 United Airlines, with the lowest prices starting at $568 and $739, respectively. Delta is 58% cheaper than the average price of flights available within the next 90 days to this destination.
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.
What is the cheapest month to book a flight from Detroit to Porto?
Currently, January is the cheapest month in which you can book a flight from Detroit to Porto (average of $523). Flying from Detroit to Porto in June is currently the most expensive (average of $1,027). 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.

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Top 3 airlines flying from Detroit to Porto

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$441	Average$1,210	FlexibilityNo cancel fee	On-timeN/A
KLM	Cheapest$568	Average$985	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$739	Average$979	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

Cheap flight deals from Detroit to Porto

Popular in

Cheapest in

Average price

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.

Cheapflights Insights

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

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

Reviews of airlines servicing Porto

See what other customers who have flown with Delta, KLM, and 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?

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

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Alternative routes for Detroit to Porto

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Top 3 airlines flying from Detroit to Porto

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