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Cheap flights from Denver to Porto from $363

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 12/12. 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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
1:25 pm - 12:10 pmDEN-OPO
15h 45m2 stops
Multiple Airlines Logo
9:05 pm - 7:55 pmOPO-DEN
29h 50m3 stops
$494Multiple Airlines
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Tue, Jan 13 - Tue, Jan 20
Multiple Airlines Logo
11:15 am - 10:15 amDEN-OPO
16h 00m2 stops
Multiple Airlines Logo
6:35 am - 7:55 pmOPO-DEN
20h 20m2 stops
$543Multiple Airlines
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Thu, Jan 15 - Thu, Jan 22
Multiple Airlines Logo
1:25 pm - 9:15 pmDEN-OPO
24h 50m3 stops
Multiple Airlines Logo
9:05 pm - 7:55 pmOPO-DEN
29h 50m3 stops
$547Multiple Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
Multiple Airlines Logo
1:25 pm - 12:10 pmDEN-OPO
15h 45m2 stops
Multiple Airlines Logo
9:05 pm - 4:40 pmOPO-DEN
26h 35m2 stops
$548Multiple Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
Multiple Airlines Logo
11:15 am - 5:35 pmDEN-OPO
23h 20m2 stops
Multiple Airlines Logo
8:00 pm - 7:55 pmOPO-DEN
30h 55m3 stops
$567Multiple Airlines
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Wed, Jan 14 - Wed, Jan 21
Multiple Airlines Logo
11:15 am - 12:05 pmDEN-OPO
17h 50m2 stops
Multiple Airlines Logo
1:45 pm - 2:35 pmOPO-DEN
31h 50m1 stop
$571Multiple Airlines
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Wed, Jan 14 - Wed, Jan 21
Multiple Airlines Logo
4:20 pm - 12:50 pmDEN-OPO
13h 30m1 stop
Multiple Airlines Logo
6:00 am - 10:23 amOPO-DEN
35h 23m2 stops
$585Multiple Airlines
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Tue, Jan 13 - Tue, Jan 20
Lufthansa Logo
4:20 pm - 1:15 pmDEN-OPO
13h 55m1 stop
Lufthansa Logo
1:45 pm - 2:35 pmOPO-DEN
31h 50m1 stop
$590Lufthansa
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Wed, Jan 14 - Wed, Jan 21
Delta Logo
6:41 am - 10:30 amDEN-OPO
20h 49m2 stops
Delta Logo
6:00 am - 8:05 pmOPO-DEN
21h 05m2 stops
$591Delta
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Wed, Jan 14 - Wed, Jan 21
Multiple Airlines Logo
11:15 am - 5:00 pmDEN-OPO
22h 45m3 stops
Multiple Airlines Logo
6:35 am - 7:55 pmOPO-DEN
20h 20m2 stops
$599Multiple Airlines
Find Deal
Thu, Jan 15 - Thu, Jan 22

United Airlines flights from Denver to Porto

Our best United Airlines deals on Denver to Porto flight tickets
United Airlines
Mar 1
DEN7:45 amDenver Intl
18h 45m
2 stops
OPO9:30 amPorto
Mar 8
OPO6:00 amPorto
17h 00m
1 stop
DEN4:00 pmDenver Intl
$628
Find similar
United Airlines
Mar 1
DEN6:00 amDenver Intl
20h 30m
2 stops
OPO9:30 amPorto
Mar 8
OPO6:00 amPorto
19h 40m
2 stops
DEN6:40 pmDenver Intl
$638
Find similar
United Airlines
Jan 12
DEN3:55 pmDenver Intl
16h 00m
1 stop
OPO2:55 pmPorto
Jan 18
OPO6:00 amPorto
41h 40m
2 stops
DEN4:40 pmDenver Intl
$644
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Turkish Airlines flights from Denver to Porto

Our best Turkish Airlines deals on Denver to Porto flight tickets
Turkish Airlines
Apr 23
DEN8:25 pmDenver Intl
36h 15m
1 stop
OPO3:40 pmPorto
May 9
OPO5:55 amPorto
19h 25m
1 stop
DEN6:20 pmDenver Intl
$665
Find similar
Turkish Airlines
Apr 11
DEN8:25 pmDenver Intl
20h 05m
1 stop
OPO11:30 pmPorto
Apr 24
OPO10:40 amPorto
38h 40m
1 stop
DEN6:20 pmDenver Intl
$689
Find similar
Turkish Airlines
Apr 28
DEN8:25 pmDenver Intl
20h 05m
1 stop
OPO11:30 pmPorto
May 7
OPO5:55 amPorto
19h 25m
1 stop
DEN6:20 pmDenver Intl
$715
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 December 1, 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 1/13

1:25 pm-12:10 pm

2 stops15h 45m

Porto

Tue 1/20

9:05 pm-7:55 pm

3 stops29h 50m

$494

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 1/15

11:15 am-10:15 am

2 stops16h 00m

Porto

Thu 1/22

6:35 am-7:55 pm

2 stops20h 20m

$543

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 1/13

1:25 pm-9:15 pm

3 stops24h 50m

Porto

Tue 1/20

9:05 pm-7:55 pm

3 stops29h 50m

$547

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 1/13

1:25 pm-12:10 pm

2 stops15h 45m

Porto

Tue 1/20

9:05 pm-4:40 pm

2 stops26h 35m

$548

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 1/14

11:15 am-5:35 pm

2 stops23h 20m

Porto

Wed 1/21

8:00 pm-7:55 pm

3 stops30h 55m

$567

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 1/14

11:15 am-12:05 pm

2 stops17h 50m

Porto

Wed 1/21

1:45 pm-2:35 pm

1 stop31h 50m

$571

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 1/13

4:20 pm-12:50 pm

1 stop13h 30m

Porto

Tue 1/20

6:00 am-10:23 am

2 stops35h 23m

$585

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 1/14

4:20 pm-1:15 pm

1 stop13h 55m

Porto

Wed 1/21

1:45 pm-2:35 pm

1 stop31h 50m

$590

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 1/14

6:41 am-10:30 am

2 stops20h 49m

Porto

Wed 1/21

6:00 am-8:05 pm

2 stops21h 05m

$591

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 1/15

11:15 am-5:00 pm

3 stops22h 45m

Porto

Thu 1/22

6:35 am-7:55 pm

2 stops20h 20m

$599

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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 March is, on average, the cheapest month to fly to Porto from Denver, with most prices found around $771. If you aren’t able to travel during the month of March, then book flights to Porto from Denver during February instead. Flights to Porto in February, while not as cheap as those in March, still average around $773.

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 $978 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 $783 on momondo.

Can stopping save me money on Denver to Porto flights?

You could potentially save up to 2% on your flight if you consider stops on a Denver to Porto flight.

How have Denver to Porto flight prices changed over time?

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

Fastest flight time

13h 30m

Direct flights

None
The fastest flight from Denver to Porto takes 13h 30m
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 13h 30m, 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
4,069 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $663Free CancellationRating
6.8
7,600 reviews
Search Lufthansa flights
United AirlinesPriceFrom $703Free CancellationRating
7.4
9,059 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
Coimbra
Braga
Aveiro
Matosinhos
Guimarães
Lamego
Esposende
Chaves
Viseu
Espinho
Ponte de Lima
Arcos de Valdevez
Pinhao
Curia
Penafiel
Mesao Frio
Mira
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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