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$254+ Cheap flights from Denver (DEN) 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — OPO
Mar 14 — Mar 211
Sat 3/14
Sat 3/21
1 adult, Economy
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Find cheap flights from Denver to Porto with Cheapflights

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Cheap flight deals from Denver to Porto

Cheapest flights from Denver to Porto
Explore the most affordable flight options available from Denver to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 12, 2026.

This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/41:25 pm
DEN
-
OPO
2 stops22h 05m
Multiple Airlines
Thu 11/196:00 am
OPO
-
DEN
1 stop17h 00m
Multiple Airlines
Deal found 2/9$484
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/44:20 pm
DEN
-
OPO
1 stop13h 30m
Lufthansa
Thu 11/196:00 am
OPO
-
DEN
1 stop17h 00m
Lufthansa
Deal found 2/9$487
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.
Mon 11/21:45 pm
DEN
-
OPO
1 stop12h 45m
United Airlines
Fri 11/206:00 am
OPO
-
DEN
1 stop17h 00m
United Airlines
Deal found 2/9$488
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 11/39:40 am
DEN
-
OPO
2 stops16h 50m
United Airlines
Fri 11/206:00 am
OPO
-
DEN
1 stop17h 00m
United Airlines
Deal found 2/9$493
This Orbitz 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/34:20 pm
DEN
-
OPO
1 stop13h 30m
Multiple Airlines
Tue 11/177:20 pm
OPO
-
DEN
2 stops31h 35m
Multiple Airlines
Deal found 2/10$497
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/28:17 am
DEN
-
OPO
2 stops18h 13m
United Airlines
Thu 11/196:00 am
OPO
-
DEN
1 stop17h 00m
United Airlines
Deal found 2/10$499
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/41:25 pm
DEN
-
OPO
2 stops38h 50m
Air Canada
Fri 11/206:00 am
OPO
-
DEN
2 stops33h 50m
Air Canada
Deal found 2/10$502
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:45 pm
DEN
-
OPO
1 stop21h 40m
Lufthansa
Thu 11/196:00 am
OPO
-
DEN
1 stop17h 00m
Lufthansa
Deal found 2/9$504
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 11/312:30 pm
DEN
-
OPO
1 stop14h 00m
United Airlines
Tue 11/1712:35 pm
OPO
-
DEN
1 stop15h 50m
United Airlines
Deal found 2/9$507

Find flight deals from Denver to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) 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 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$570
(Mytrip)

One-way from

$254
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$989
Provider with most accurate pricing for Denver Intl-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Porto flights.
Search Deals
From Denver Intl to Porto
Search Deals
One-way flight from Denver Intl to Porto
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($230 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver 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 12, 2026.
Use the filters below to find and compare flights from Denver to Porto that are best for you.

Fly from

Denver

Fly to

Porto

Route

Depart

Return

Price

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 3/9

5:20 pm-12:50 pm

1 stop13h 30m

Porto

Mon 3/16

4:15 pm-5:00 pm

1 stop30h 45m

$570

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/21

4:05 pm-11:25 pm

1 stop24h 20m

Porto

Tue 5/5

8:40 am-11:10 pm

2 stops21h 30m

$575

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 3/11

7:45 am-11:40 am

2 stops21h 55m

Porto

Wed 3/18

6:00 am-10:33 am

2 stops34h 33m

$579

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 3/11

6:45 pm-3:25 pm

1 stop14h 40m

Porto

Wed 3/18

6:00 am-5:00 pm

1 stop17h 00m

$585

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/21

6:40 pm-7:30 pm

1 stop17h 50m

Porto

Tue 5/5

8:40 pm-4:30 pm

1 stop26h 50m

$608

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 3/9

1:25 pm-12:50 pm

2 stops17h 25m

Porto

Mon 3/16

4:15 pm-5:00 pm

1 stop30h 45m

$616

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 2/25

1:25 pm-1:15 pm

2 stops16h 50m

Porto

Wed 3/4

6:00 am-4:00 pm

1 stop17h 00m

$631

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 2/25

1:40 pm-9:30 am

1 stop12h 50m

Porto

Wed 3/4

6:00 am-4:00 pm

1 stop17h 00m

$639

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 3/3

7:45 am-9:30 am

2 stops18h 45m

Porto

Tue 3/10

6:00 am-5:00 pm

1 stop17h 00m

$643

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 3/4

7:45 am-9:30 am

2 stops18h 45m

Porto

Wed 3/11

6:00 am-5:00 pm

1 stop17h 00m

$643

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/11

Showing 1-10 of 17 results
1
2

Compare providers for flights from Denver 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 Denver to Porto in February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 Denver-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-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 Denver-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 Denver to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Denver 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 Denver to Porto

How far ahead should I book a flight from Denver to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Porto. Price data was last updated on February 6, 2026.

The best time to book flights from Denver to Porto is 35 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, March is the cheapest month in which you can book a flight from Denver to Porto (average of $574). Flying from Denver to Porto in June is currently the most expensive (average of $1,092). 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

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 February 12, 2026.
Get a feel of what it's like to fly with United Airlines, Turkish Airlines, and Lufthansa from Denver to Porto by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,279 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,279 reviews
United Airlines
7.4
Good
9,279 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Turkish Airlines
7.3
Good
4,208 reviews
United Airlines
7.4
Good
9,279 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Lufthansa
6.8
Okay
7,780 reviews
United Airlines
7.4
Good
9,279 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Denver 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 Denver to Porto?

    Departing from Denver to Porto will take you 13h 30m. There are 4747 mi between Denver and Porto. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Currently priced at $574, Turkish Airlines will fly you from Denver to Porto and back. In addition to Turkish Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Lufthansa - these airlines can fly you to your destination from $593 and $641, respectively. Turkish Airlines is currently priced 41% below the average price you’ll pay for this route.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Denver 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 Denver to Porto?

    Currently, March is the cheapest month in which you can book a flight from Denver to Porto (average of $574). Flying from Denver to Porto in June is currently the most expensive (average of $1,092). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Denver to Porto

Discover the top 3 airlines that operate flights from Denver to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$574Average$690FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$593Average$993FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$641Average$871FlexibilityNo cancel feeOn-time76%

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