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Cheap flights from Denver to Porto from $267

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Porto departing on 10/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Denver to Porto (DEN-OPO)

Cheap round-trip flights

Logo
6:00 am - 9:30 amDEN-OPO
20h 30m1 stop
Logo
6:00 am - 4:00 pmOPO-DEN
17h 00m1 stop
$579
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Mon, Nov 3 - Thu, Nov 13
Logo
8:37 pm - 9:30 amDEN-OPO
29h 53m2 stops
Logo
6:00 am - 4:00 pmOPO-DEN
17h 00m1 stop
$589
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Mon, Nov 3 - Thu, Nov 13
Logo
6:00 am - 9:30 amDEN-OPO
20h 30m1 stop
Logo
4:15 pm - 4:00 pmOPO-DEN
30h 45m1 stop
$599
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Mon, Nov 3 - Mon, Nov 10
United Airlines Logo
5:45 pm - 3:25 pmDEN-OPO
14h 40m1 stop
United Airlines Logo
6:00 am - 1:40 pmOPO-DEN
14h 40m1 stop
$602United Airlines
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Wed, Feb 18 - Fri, Feb 27
United Airlines Logo
10:12 am - 9:30 amDEN-OPO
16h 18m2 stops
United Airlines Logo
12:30 pm - 1:40 pmOPO-DEN
32h 10m1 stop
$603United Airlines
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Mon, Nov 17 - Mon, Nov 24
Iberia Logo
5:31 pm - 11:40 amDEN-OPO
35h 09m2 stops
Iberia Logo
8:20 am - 10:22 pmOPO-DEN
21h 02m2 stops
$614Iberia
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Sat, Oct 18 - Fri, Nov 7
Lufthansa Logo
5:42 pm - 11:40 pmDEN-OPO
22h 58m2 stops
Lufthansa Logo
12:30 pm - 11:18 pmOPO-DEN
17h 48m2 stops
$619Lufthansa
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Wed, Feb 18 - Wed, Feb 25
Lufthansa Logo
5:42 pm - 11:40 pmDEN-OPO
22h 58m2 stops
Lufthansa Logo
12:30 pm - 4:00 pmOPO-DEN
34h 30m1 stop
$629Lufthansa
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Wed, Feb 18 - Mon, Feb 23
Iberia Logo
5:25 pm - 7:40 amDEN-OPO
31h 15m2 stops
Iberia Logo
8:40 pm - 11:31 amOPO-DEN
21h 51m2 stops
$632Iberia
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Mon, Nov 3 - Mon, Nov 10
Delta Logo
6:30 am - 10:25 amDEN-OPO
20h 55m2 stops
Delta Logo
11:10 am - 10:49 pmOPO-DEN
18h 39m2 stops
$676Delta
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Thu, Feb 19 - Tue, Feb 24

Lufthansa flights from Denver to Porto

Our best Lufthansa deals on Denver to Porto flight tickets
Lufthansa
Feb 18
DEN5:42 pmDenver Intl
22h 58m
2 stops
OPO11:40 pmPorto
Feb 25
OPO12:30 pmPorto
17h 48m
2 stops
DEN11:18 pmDenver Intl
$619
Find similar
Lufthansa
Feb 18
DEN5:42 pmDenver Intl
22h 58m
2 stops
OPO11:40 pmPorto
Feb 23
OPO12:30 pmPorto
34h 30m
1 stop
DEN4:00 pmDenver Intl
$629
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Lufthansa
Nov 9
DEN5:45 pmDenver Intl
14h 30m
1 stop
OPO3:15 pmPorto
Nov 16
OPO6:00 amPorto
17h 00m
1 stop
DEN4:00 pmDenver Intl
$641
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Air Europa flights from Denver to Porto

Our best Air Europa deals on Denver to Porto flight tickets
Air Europa
Sep 5
DEN7:20 amDenver Intl
29h 00m
2 stops
OPO7:20 pmPorto
Sep 12
OPO11:35 amPorto
18h 00m
2 stops
DEN10:35 pmDenver Intl
$1,263
Find similar
Air Europa
Sep 5
DEN7:20 amDenver Intl
24h 55m
2 stops
OPO3:15 pmPorto
Sep 12
OPO11:35 amPorto
18h 00m
2 stops
DEN10:35 pmDenver Intl
$1,269
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Air Europa
Sep 6
DEN12:11 pmDenver Intl
20h 04m
2 stops
OPO3:15 pmPorto
Sep 10
OPO4:05 pmPorto
37h 30m
2 stops
DEN10:35 pmDenver Intl
$1,273
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momondo 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, momondo users made 832,500 searches. Data last updated August 26, 2025.
Use the filters below to find and compare flights from Denver to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 11/3

6:00 am-9:30 am

1 stop20h 30m

Porto

Thu 11/13

6:00 am-4:00 pm

1 stop17h 00m

$579

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 11/3

8:37 pm-9:30 am

2 stops29h 53m

Porto

Thu 11/13

6:00 am-4:00 pm

1 stop17h 00m

$589

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 11/3

6:00 am-9:30 am

1 stop20h 30m

Porto

Mon 11/10

4:15 pm-4:00 pm

1 stop30h 45m

$599

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 2/18

5:45 pm-3:25 pm

1 stop14h 40m

Porto

Fri 2/27

6:00 am-1:40 pm

1 stop14h 40m

$602

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 11/17

10:12 am-9:30 am

2 stops16h 18m

Porto

Mon 11/24

12:30 pm-1:40 pm

1 stop32h 10m

$603

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sat 10/18

5:31 pm-11:40 am

2 stops35h 09m

Porto

Fri 11/7

8:20 am-10:22 pm

2 stops21h 02m

$614

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 2/18

5:42 pm-11:40 pm

2 stops22h 58m

Porto

Wed 2/25

12:30 pm-11:18 pm

2 stops17h 48m

$619

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 2/18

5:42 pm-11:40 pm

2 stops22h 58m

Porto

Mon 2/23

12:30 pm-4:00 pm

1 stop34h 30m

$629

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 11/3

5:25 pm-7:40 am

2 stops31h 15m

Porto

Mon 11/10

8:40 pm-11:31 am

2 stops21h 51m

$632

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 2/19

6:30 am-10:25 am

2 stops20h 55m

Porto

Tue 2/24

11:10 am-10:49 pm

2 stops18h 39m

$676

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Porto from

How to get the cheapest flight ticket from Denver to Porto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from Denver, with most prices found around $729. If you aren’t able to travel during the month of January, then book flights to Porto from Denver during February instead. Flights to Porto in February, while not as cheap as those in January, still average around $764.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Monday when prices can be found for as low as $1,053. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $1,233. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the evening is the cheapest time of day to fly from Denver to Porto when you can find flight prices for as low as $982. Flying to Porto in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,448 on average. Flights to Porto from Denver at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $969 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Denver for as low as $850 on momondo.

Can stopping save me money on Denver to Porto flights?

You could potentially save up to 14% on your flight if you consider stops on a Denver to Porto flight.

How have Denver to Porto flight prices changed over time?

As of August 2025, prices for Denver to Porto flights are approximately 34% cheaper when compared to flights at the same time last year.

When to book flights from Denver to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Denver to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Denver to Porto (DEN to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to Porto

Direct flights

None
There are no direct flights from Denver to Porto. There are no popular flight routes from Denver to Porto.
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  • How far is Denver Intl to Porto by plane?

    A flight from Denver Intl to Porto will travel around 4771.4 mi. Flights usually cover this in 12h 35m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Denver Intl Airport to Porto Airport?

    Prices for flights from Denver Intl Airport to Porto Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Denver Intl Airport to Porto Airport?

  • How old do you have to be to fly from Denver Intl Airport to Porto Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Denver Intl Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The required travel and health documents for your Porto Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Porto Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Denver to Porto?

Best airlines flying from Denver to Porto

Compare and see reviews for airlines that fly from Denver to Porto with momondo
Airline
Rating
Free Cancellation
Price
Turkish AirlinesPriceFrom $574Free CancellationRating
7.3
3,955 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $681Free CancellationRating
6.8
7,359 reviews
Search Lufthansa flights
United AirlinesPriceFrom $750Free CancellationRating
7.4
8,943 reviews
Search United Airlines flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Aveiro
Coimbra
Braga
Matosinhos
Caminha
Guimarães
Lamego
Esposende
Chaves
Arcos de Valdevez
Espinho
Viseu
Ponte de Lima
Pinhao
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
Baiao

Why use momondo?

Why should I use momondo to find a flight deal from Denver to Porto?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Denver to Porto for you.

Can I find flights from Denver to Porto with flexible booking policies on momondo?

Yes. All flights to Porto from Denver on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Denver to Porto?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Denver to Porto.

I’m not ready to book a flight from Denver to Porto right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Denver to Porto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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