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Cheap flights from Denver to Porto from $372

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 5/29. 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.
Turkish Airlines Logo
8:25 pm - 3:40 pm
DEN
-
OPO
36h 15m
1 stop
Turkish Airlines Logo
4:45 pm - 6:25 pm
OPO
-
DEN
32h 40m
1 stop
$708Turkish Airlines
Tue, Sep 1 - Fri, Sep 18
Turkish Airlines Logo
8:25 pm - 11:30 pm
DEN
-
OPO
20h 05m
1 stop
Turkish Airlines Logo
10:40 am - 6:25 pm
OPO
-
DEN
38h 45m
1 stop
$715Turkish Airlines
Tue, Aug 18 - Mon, Aug 31
Turkish Airlines Logo
8:25 pm - 10:00 am
DEN
-
OPO
30h 35m
1 stop
Turkish Airlines Logo
10:40 am - 6:25 pm
OPO
-
DEN
38h 45m
1 stop
$717Turkish Airlines
Tue, Aug 18 - Mon, Aug 31
Turkish Airlines Logo
8:25 pm - 3:40 pm
DEN
-
OPO
36h 15m
1 stop
Turkish Airlines Logo
10:40 am - 6:25 pm
OPO
-
DEN
38h 45m
1 stop
$738Turkish Airlines
Tue, Sep 1 - Fri, Sep 18
Turkish Airlines Logo
8:25 pm - 11:30 pm
DEN
-
OPO
20h 05m
1 stop
Turkish Airlines Logo
6:10 am - 6:25 pm
OPO
-
DEN
19h 15m
1 stop
$741Turkish Airlines
Tue, Sep 29 - Thu, Oct 8
Turkish Airlines Logo
8:25 pm - 9:45 am
DEN
-
OPO
30h 20m
1 stop
Turkish Airlines Logo
6:10 am - 6:25 pm
OPO
-
DEN
19h 15m
1 stop
$745Turkish Airlines
Thu, Sep 24 - Thu, Oct 22
Multiple Airlines Logo
11:25 am - 7:00 am
DEN
-
OPO
12h 35m
1 stop
Multiple Airlines Logo
6:00 am - 4:00 pm
OPO
-
DEN
17h 00m
1 stop
$746Multiple Airlines
Tue, Sep 29 - Tue, Nov 24
Turkish Airlines Logo
8:25 pm - 11:30 pm
DEN
-
OPO
20h 05m
1 stop
Turkish Airlines Logo
10:40 am - 6:25 pm
OPO
-
DEN
38h 45m
1 stop
$747Turkish Airlines
Tue, Aug 18 - Mon, Aug 31
Multiple Airlines Logo
7:50 pm - 7:00 am
DEN
-
OPO
28h 10m
2 stops
Multiple Airlines Logo
1:45 pm - 2:35 pm
OPO
-
DEN
31h 50m
1 stop
$757Multiple Airlines
Tue, Sep 29 - Tue, Nov 24
Turkish Airlines Logo
8:25 pm - 9:45 am
DEN
-
OPO
30h 20m
1 stop
Turkish Airlines Logo
4:45 pm - 6:25 pm
OPO
-
DEN
32h 40m
1 stop
$762Turkish Airlines
Thu, Sep 10 - Fri, Sep 18

United Airlines flights from Denver to Porto

Our best United Airlines deals on Denver to Porto flight tickets
United Airlines
Sep 30
DEN9:40 amDenver Intl
14h 20m
1 stop
OPO7:00 amPorto
Oct 13
OPO12:15 pmPorto
33h 33m
2 stops
DEN2:48 pmDenver Intl
$817
United Airlines
Sep 30
DEN9:40 amDenver Intl
14h 20m
1 stop
OPO7:00 amPorto
Oct 13
OPO12:15 pmPorto
33h 33m
2 stops
DEN2:48 pmDenver Intl
$818
United Airlines
Sep 30
DEN8:10 amDenver Intl
15h 50m
2 stops
OPO7:00 amPorto
Oct 13
OPO12:15 pmPorto
31h 03m
2 stops
DEN12:18 pmDenver Intl
$822

Iberia flights from Denver to Porto

Our best Iberia deals on Denver to Porto flight tickets
Iberia
Aug 18
DEN4:21 pmDenver Intl
16h 39m
2 stops
OPO4:00 pmPorto
Aug 31
OPO8:40 pmPorto
29h 59m
2 stops
DEN7:39 pmDenver Intl
$877
Iberia
Aug 17
DEN4:21 pmDenver Intl
16h 39m
2 stops
OPO4:00 pmPorto
Aug 24
OPO4:40 pmPorto
34h 42m
2 stops
DEN8:22 pmDenver Intl
$927

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 April 14, 2026.
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

Cheapest round-trip

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 9/1

8:25 pm-3:40 pm

1 stop36h 15m

Porto

Fri 9/18

4:45 pm-6:25 pm

1 stop32h 40m

$708

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 8/18

8:25 pm-11:30 pm

1 stop20h 05m

Porto

Mon 8/31

10:40 am-6:25 pm

1 stop38h 45m

$715

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 8/18

8:25 pm-10:00 am

1 stop30h 35m

Porto

Mon 8/31

10:40 am-6:25 pm

1 stop38h 45m

$717

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 9/1

8:25 pm-3:40 pm

1 stop36h 15m

Porto

Fri 9/18

10:40 am-6:25 pm

1 stop38h 45m

$738

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 9/29

8:25 pm-11:30 pm

1 stop20h 05m

Porto

Thu 10/8

6:10 am-6:25 pm

1 stop19h 15m

$741

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 9/24

8:25 pm-9:45 am

1 stop30h 20m

Porto

Thu 10/22

6:10 am-6:25 pm

1 stop19h 15m

$745
Quickest round-trip

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 9/29

11:25 am-7:00 am

1 stop12h 35m

Porto

Tue 11/24

6:00 am-4:00 pm

1 stop17h 00m

$746

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 8/18

8:25 pm-11:30 pm

1 stop20h 05m

Porto

Mon 8/31

10:40 am-6:25 pm

1 stop38h 45m

$747

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 9/29

7:50 pm-7:00 am

2 stops28h 10m

Porto

Tue 11/24

1:45 pm-2:35 pm

1 stop31h 50m

$757

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 9/10

8:25 pm-9:45 am

1 stop30h 20m

Porto

Fri 9/18

4:45 pm-6:25 pm

1 stop32h 40m

$762

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 typical price of a round-trip flight between Denver and Porto?

What is the cheapest month to fly to Porto?

The month of February is, on average, the cheapest month to fly to Porto from Denver, with most prices found around $723. If you aren’t able to travel during the month of February, then book flights to Porto from Denver during November instead. Flights to Porto in November, while not as cheap as those in February, still average around $800.

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 $965 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 $768 on momondo.

Can stopping save me money on Denver to Porto flights?

You could potentially save up to 18% 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

12h 35m

Direct flights

None
The fastest flight from Denver to Porto takes 12h 35m
There are no direct flights from Denver to Porto. There are no popular flight routes from Denver to Porto.
Search flight deals

Frequently asked questions about flying from Denver to Porto

  • 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
United AirlinesPriceFrom $592Free CancellationRating
7.4
9,581 reviews
Search United Airlines flights
LufthansaPriceFrom $663Free CancellationRating
6.8
7,921 reviews
Search Lufthansa flights
Turkish AirlinesPriceFrom $690Free CancellationRating
7.3
4,304 reviews
Search Turkish 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
Lamego
Esposende
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Ponte de Lima
Viseu
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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