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Cheap flights from Denver to Porto from $282

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 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Denver to Porto

Cheap round-trip flights

American Airlines Logo
6:23 am - 7:40 amDEN-OPO
18h 17m2 stops
American Airlines Logo
8:20 am - 10:22 pmOPO-DEN
21h 02m2 stops
$578American Airlines
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Tue, Nov 4 - Wed, Nov 12
Multiple Airlines Logo
11:15 am - 9:30 amDEN-OPO
15h 15m2 stops
Multiple Airlines Logo
6:00 am - 2:40 pmOPO-DEN
14h 40m1 stop
$600Multiple Airlines
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Tue, Mar 3 - Tue, Mar 17
United Airlines Logo
7:45 am - 9:30 amDEN-OPO
18h 45m2 stops
United Airlines Logo
6:00 am - 4:00 pmOPO-DEN
17h 00m1 stop
$604United Airlines
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Tue, Nov 4 - Wed, Nov 12
United Airlines Logo
4:10 pm - 9:30 amDEN-OPO
11h 20m1 stop
United Airlines Logo
12:30 pm - 11:15 pmOPO-DEN
17h 45m2 stops
$610United Airlines
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Mon, Oct 27 - Fri, Nov 7
Multiple Airlines Logo
11:45 am - 9:30 amDEN-OPO
15h 45m1 stop
Multiple Airlines Logo
6:15 am - 2:35 pmOPO-DEN
15h 20m1 stop
$611Multiple Airlines
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Mon, Oct 27 - Fri, Nov 7
Lufthansa Logo
5:45 pm - 10:25 pmDEN-OPO
21h 40m1 stop
Lufthansa Logo
6:00 am - 5:00 pmOPO-DEN
17h 00m1 stop
$624Lufthansa
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Mon, Mar 2 - Wed, Mar 18
Lufthansa Logo
5:45 pm - 10:25 pmDEN-OPO
21h 40m1 stop
Lufthansa Logo
6:00 am - 5:00 pmOPO-DEN
17h 00m1 stop
$629Lufthansa
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Sun, Mar 1 - Wed, Mar 18
Iberia Logo
10:40 am - 11:45 amDEN-OPO
19h 05m2 stops
Iberia Logo
8:40 pm - 10:22 pmOPO-DEN
32h 42m2 stops
$639Iberia
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Thu, Oct 30 - Thu, Nov 6
British Airways Logo
5:25 pm - 7:00 pmDEN-OPO
18h 35m1 stop
British Airways Logo
4:55 pm - 3:30 pmOPO-DEN
29h 35m1 stop
$688British Airways
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Fri, Dec 12 - Thu, Dec 18
British Airways Logo
5:25 pm - 7:40 amDEN-OPO
31h 15m2 stops
British Airways Logo
4:55 pm - 3:30 pmOPO-DEN
29h 35m1 stop
$724British Airways
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Fri, Dec 12 - Thu, Dec 18

American Airlines flights from Denver to Porto

Our best American Airlines deals on Denver to Porto flight tickets
American Airlines
Nov 4
DEN6:23 amDenver Intl
18h 17m
2 stops
OPO7:40 amPorto
Nov 12
OPO8:20 amPorto
21h 02m
2 stops
DEN10:22 pmDenver Intl
$578
Find similar
American Airlines
Nov 9
DEN12:32 pmDenver Intl
16h 13m
2 stops
OPO11:45 amPorto
Nov 16
OPO8:20 amPorto
21h 02m
2 stops
DEN10:22 pmDenver Intl
$628
Find similar
American Airlines
Oct 30
DEN10:40 amDenver Intl
19h 05m
2 stops
OPO11:45 amPorto
Nov 8
OPO8:20 amPorto
21h 02m
2 stops
DEN10:22 pmDenver Intl
$678
Find similar

United Airlines flights from Denver to Porto

Our best United Airlines deals on Denver to Porto flight tickets
United Airlines
Nov 4
DEN7:45 amDenver Intl
18h 45m
2 stops
OPO9:30 amPorto
Nov 12
OPO6:00 amPorto
17h 00m
1 stop
DEN4:00 pmDenver Intl
$604
Find similar
United Airlines
Oct 27
DEN4:10 pmDenver Intl
11h 20m
1 stop
OPO9:30 amPorto
Nov 7
OPO12:30 pmPorto
17h 45m
2 stops
DEN11:15 pmDenver Intl
$610
Find similar
United Airlines
Mar 3
DEN1:45 pmDenver Intl
12h 45m
1 stop
OPO9:30 amPorto
Mar 18
OPO12:35 pmPorto
14h 50m
1 stop
DEN9:25 pmDenver Intl
$613
Find similar

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 September 17, 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

Tue 11/4

6:23 am-7:40 am

2 stops18h 17m

Porto

Wed 11/12

8:20 am-10:22 pm

2 stops21h 02m

$578

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 3/3

11:15 am-9:30 am

2 stops15h 15m

Porto

Tue 3/17

6:00 am-2:40 pm

1 stop14h 40m

$600

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 11/4

7:45 am-9:30 am

2 stops18h 45m

Porto

Wed 11/12

6:00 am-4:00 pm

1 stop17h 00m

$604

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 10/27

4:10 pm-9:30 am

1 stop11h 20m

Porto

Fri 11/7

12:30 pm-11:15 pm

2 stops17h 45m

$610

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 10/27

11:45 am-9:30 am

1 stop15h 45m

Porto

Fri 11/7

6:15 am-2:35 pm

1 stop15h 20m

$611

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 3/2

5:45 pm-10:25 pm

1 stop21h 40m

Porto

Wed 3/18

6:00 am-5:00 pm

1 stop17h 00m

$624

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 3/1

5:45 pm-10:25 pm

1 stop21h 40m

Porto

Wed 3/18

6:00 am-5:00 pm

1 stop17h 00m

$629

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 10/30

10:40 am-11:45 am

2 stops19h 05m

Porto

Thu 11/6

8:40 pm-10:22 pm

2 stops32h 42m

$639

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Fri 12/12

5:25 pm-7:00 pm

1 stop18h 35m

Porto

Thu 12/18

4:55 pm-3:30 pm

1 stop29h 35m

$688

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Fri 12/12

5:25 pm-7:40 am

2 stops31h 15m

Porto

Thu 12/18

4:55 pm-3:30 pm

1 stop29h 35m

$724

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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 typical price of a round-trip flight between Denver and Porto?

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 $970 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 $823 on momondo.

Can stopping save me money on Denver to Porto flights?

You could potentially save up to 4% 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 September 2025, prices for Denver to Porto flights are approximately 41% 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 11h 20m, 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
3,965 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $663Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
United AirlinesPriceFrom $750Free CancellationRating
7.4
8,926 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
Esposende
Lamego
Chaves
Espinho
Arcos de Valdevez
Viseu
Ponte de Lima
Pinhao
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
Mira

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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