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Cheap flights from Denver to Porto from $386

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 9/16. 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
1 adult, Economy, 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
4:50 pm - 6:25 pm
OPO
-
DEN
32h 35m
1 stop
$651Turkish Airlines
Tue, May 5 - Mon, May 11
Turkish Airlines Logo
8:25 pm - 3:40 pm
DEN
-
OPO
36h 15m
1 stop
Turkish Airlines Logo
4:40 pm - 6:25 pm
OPO
-
DEN
32h 45m
1 stop
$652Turkish Airlines
Tue, May 5 - Wed, May 20
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
$671Turkish Airlines
Thu, Apr 16 - Thu, Apr 23
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
$677Turkish 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
$680Turkish Airlines
Thu, Apr 16 - Thu, Apr 23
Turkish Airlines Logo
8:25 pm - 3:50 pm
DEN
-
OPO
36h 25m
1 stop
Turkish Airlines Logo
10:45 am - 6:25 pm
OPO
-
DEN
38h 40m
1 stop
$681Turkish Airlines
Sat, Apr 4 - Sat, Apr 18
Turkish Airlines Logo
8:25 pm - 11:30 pm
DEN
-
OPO
20h 05m
1 stop
Turkish Airlines Logo
4:50 pm - 6:25 pm
OPO
-
DEN
32h 35m
1 stop
$701Turkish Airlines
Tue, Aug 18 - Mon, Aug 31
Turkish Airlines Logo
8:25 pm - 11:30 pm
DEN
-
OPO
20h 05m
1 stop
Turkish Airlines Logo
4:45 pm - 6:25 pm
OPO
-
DEN
32h 40m
1 stop
$710Turkish Airlines
Thu, Sep 10 - Fri, Oct 2
Turkish Airlines Logo
8:25 pm - 11:30 pm
DEN
-
OPO
20h 05m
1 stop
Turkish Airlines Logo
4:50 pm - 6:25 pm
OPO
-
DEN
32h 35m
1 stop
$711Turkish Airlines
Tue, Aug 18 - Mon, Aug 31
Lufthansa Logo
4:05 pm - 11:25 pm
DEN
-
OPO
24h 20m
1 stop
Lufthansa Logo
6:20 am - 2:20 pm
OPO
-
DEN
15h 00m
1 stop
$720Lufthansa
Tue, Apr 14 - Tue, Apr 21

KLM flights from Denver to Porto

Our best KLM deals on Denver to Porto flight tickets
KLM
Aug 12
DEN5:40 pmDenver Intl
21h 20m
1 stop
OPO10:00 pmPorto
Aug 25
OPO9:25 amPorto
17h 54m
2 stops
DEN8:19 pmDenver Intl
$774
KLM
Aug 12
DEN5:40 pmDenver Intl
14h 45m
1 stop
OPO3:25 pmPorto
Aug 25
OPO4:25 pmPorto
30h 15m
1 stop
DEN3:40 pmDenver Intl
$776
KLM
Apr 26
DEN6:27 pmDenver Intl
16h 43m
2 stops
OPO6:10 pmPorto
May 6
OPO5:55 amPorto
18h 00m
2 stops
DEN4:55 pmDenver Intl
$784

American Airlines flights from Denver to Porto

Our best American Airlines deals on Denver to Porto flight tickets
American Airlines
May 4
DEN5:14 pmDenver Intl
15h 46m
2 stops
OPO4:00 pmPorto
Nov 16
OPO8:40 pmPorto
21h 51m
2 stops
DEN11:31 amDenver Intl
$785
American Airlines
May 5
DEN6:00 amDenver Intl
18h 40m
2 stops
OPO7:40 amPorto
May 20
OPO8:20 amPorto
22h 29m
2 stops
DEN11:49 pmDenver Intl
$789

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 March 21, 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 5/5

8:25 pm-3:40 pm

1 stop36h 15m

Porto

Mon 5/11

4:50 pm-6:25 pm

1 stop32h 35m

$651

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 5/5

8:25 pm-3:40 pm

1 stop36h 15m

Porto

Wed 5/20

4:40 pm-6:25 pm

1 stop32h 45m

$652
Quickest round-trip

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 4/16

8:25 pm-11:30 pm

1 stop20h 05m

Porto

Thu 4/23

6:10 am-6:25 pm

1 stop19h 15m

$671

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 9/1

8:25 pm-10:00 am

1 stop30h 35m

Porto

Fri 9/18

10:40 am-6:25 pm

1 stop38h 45m

$677

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 4/16

8:25 pm-11:30 pm

1 stop20h 05m

Porto

Thu 4/23

6:10 am-6:25 pm

1 stop19h 15m

$680

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sat 4/4

8:25 pm-3:50 pm

1 stop36h 25m

Porto

Sat 4/18

10:45 am-6:25 pm

1 stop38h 40m

$681

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 8/18

8:25 pm-11:30 pm

1 stop20h 05m

Porto

Mon 8/31

4:50 pm-6:25 pm

1 stop32h 35m

$701

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 9/10

8:25 pm-11:30 pm

1 stop20h 05m

Porto

Fri 10/2

4:45 pm-6:25 pm

1 stop32h 40m

$710

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 8/18

8:25 pm-11:30 pm

1 stop20h 05m

Porto

Mon 8/31

4:50 pm-6:25 pm

1 stop32h 35m

$711

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/14

4:05 pm-11:25 pm

1 stop24h 20m

Porto

Tue 4/21

6:20 am-2:20 pm

1 stop15h 00m

$720

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 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 $799.

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 $936 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 $753 on momondo.

Can stopping save me money on Denver to Porto flights?

You could potentially save up to 23% 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 04m

Direct flights

None
The fastest flight from Denver to Porto takes 13h 04m
There are no direct flights from Denver to Porto. There are no popular flight routes from Denver to Porto.
Search flight deals

  • 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 04m, 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 $593Free CancellationRating
7.4
9,452 reviews
Search United Airlines flights
Turkish AirlinesPriceFrom $645Free CancellationRating
7.3
4,266 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $663Free CancellationRating
6.8
7,859 reviews
Search Lufthansa 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
Aveiro
Braga
Matosinhos
Esposende
Lamego
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Viseu
Ponte de Lima
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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