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Cheap flights from Denver to Porto from $271

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 4/30. 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.
Delta Logo
12:30 pm - 3:25 pm
DEN
-
OPO
19h 55m
2 stops
Delta Logo
5:00 am - 10:06 pm
OPO
-
DEN
24h 06m
2 stops
$584Delta
Tue, Apr 21 - Tue, Apr 28
KLM Logo
6:01 pm - 6:20 pm
DEN
-
OPO
17h 19m
2 stops
KLM Logo
5:00 am - 6:10 pm
OPO
-
DEN
20h 10m
2 stops
$589KLM
Tue, Apr 21 - Tue, Apr 28
Multiple Airlines Logo
6:40 pm - 7:30 pm
DEN
-
OPO
17h 50m
1 stop
Multiple Airlines Logo
8:40 pm - 10:45 pm
OPO
-
DEN
33h 05m
2 stops
$598Multiple Airlines
Tue, Apr 21 - Tue, Apr 28
Iberia Logo
2:41 pm - 4:00 pm
DEN
-
OPO
18h 19m
2 stops
Iberia Logo
8:40 pm - 10:45 pm
OPO
-
DEN
33h 05m
2 stops
$603Iberia
Tue, Apr 21 - Tue, Apr 28
British Airways Logo
6:40 pm - 8:05 pm
DEN
-
OPO
18h 25m
1 stop
British Airways Logo
9:25 pm - 4:30 pm
OPO
-
DEN
26h 05m
1 stop
$620British Airways
Mon, Apr 13 - Mon, Apr 27
British Airways Logo
6:30 pm - 8:05 pm
DEN
-
OPO
18h 35m
2 stops
British Airways Logo
9:25 pm - 4:30 pm
OPO
-
DEN
26h 05m
1 stop
$621British Airways
Mon, Apr 13 - Mon, Apr 27
Delta Logo
5:45 am - 3:25 pm
DEN
-
OPO
26h 40m
2 stops
Delta Logo
6:30 am - 10:48 pm
OPO
-
DEN
23h 18m
2 stops
$628Delta
Mon, Apr 13 - Mon, Apr 27
Multiple Airlines Logo
5:40 pm - 3:40 pm
DEN
-
OPO
15h 00m
1 stop
Multiple Airlines Logo
7:20 pm - 7:54 pm
OPO
-
DEN
31h 34m
2 stops
$634Multiple Airlines
Mon, May 4 - Mon, Nov 16
American Airlines Logo
2:41 pm - 4:00 pm
DEN
-
OPO
18h 19m
2 stops
American Airlines Logo
8:40 pm - 11:31 am
OPO
-
DEN
21h 51m
2 stops
$636American Airlines
Mon, May 4 - Mon, Nov 16
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
$639Turkish Airlines
Thu, Apr 16 - Thu, Apr 23

Delta flights from Denver to Porto

Our best Delta deals on Denver to Porto flight tickets
Delta
Apr 21
DEN12:30 pmDenver Intl
19h 55m
2 stops
OPO3:25 pmPorto
Apr 28
OPO5:00 amPorto
24h 06m
2 stops
DEN10:06 pmDenver Intl
$584
Delta
Apr 13
DEN5:45 amDenver Intl
26h 40m
2 stops
OPO3:25 pmPorto
Apr 27
OPO6:30 amPorto
23h 18m
2 stops
DEN10:48 pmDenver Intl
$628
Delta
Apr 14
DEN12:44 pmDenver Intl
19h 41m
2 stops
OPO3:25 pmPorto
Apr 19
OPO5:00 amPorto
22h 46m
2 stops
DEN8:46 pmDenver Intl
$698

KLM flights from Denver to Porto

Our best KLM deals on Denver to Porto flight tickets
KLM
Apr 21
DEN6:01 pmDenver Intl
17h 19m
2 stops
OPO6:20 pmPorto
Apr 28
OPO5:00 amPorto
20h 10m
2 stops
DEN6:10 pmDenver Intl
$589
KLM
May 12
DEN5:40 pmDenver Intl
21h 25m
1 stop
OPO10:05 pmPorto
May 24
OPO5:55 amPorto
16h 45m
1 stop
DEN3:40 pmDenver Intl
$733
KLM
May 12
DEN5:40 pmDenver Intl
21h 25m
1 stop
OPO10:05 pmPorto
May 24
OPO5:55 amPorto
16h 45m
1 stop
DEN3:40 pmDenver Intl
$734

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 7, 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 4/21

12:30 pm-3:25 pm

2 stops19h 55m

Porto

Tue 4/28

5:00 am-10:06 pm

2 stops24h 06m

$584
Quickest round-trip

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/21

6:01 pm-6:20 pm

2 stops17h 19m

Porto

Tue 4/28

5:00 am-6:10 pm

2 stops20h 10m

$589

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/21

6:40 pm-7:30 pm

1 stop17h 50m

Porto

Tue 4/28

8:40 pm-10:45 pm

2 stops33h 05m

$598

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/21

2:41 pm-4:00 pm

2 stops18h 19m

Porto

Tue 4/28

8:40 pm-10:45 pm

2 stops33h 05m

$603

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 4/13

6:40 pm-8:05 pm

1 stop18h 25m

Porto

Mon 4/27

9:25 pm-4:30 pm

1 stop26h 05m

$620

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 4/13

6:30 pm-8:05 pm

2 stops18h 35m

Porto

Mon 4/27

9:25 pm-4:30 pm

1 stop26h 05m

$621

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 4/13

5:45 am-3:25 pm

2 stops26h 40m

Porto

Mon 4/27

6:30 am-10:48 pm

2 stops23h 18m

$628

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 5/4

5:40 pm-3:40 pm

1 stop15h 00m

Porto

Mon 11/16

7:20 pm-7:54 pm

2 stops31h 34m

$634

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 5/4

2:41 pm-4:00 pm

2 stops18h 19m

Porto

Mon 11/16

8:40 pm-11:31 am

2 stops21h 51m

$636

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 4/16

8:25 pm-9:45 am

1 stop30h 20m

Porto

Thu 4/23

6:10 am-6:25 pm

1 stop19h 15m

$639

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 $937 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 22% 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

  • 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 $575Free CancellationRating
7.3
4,250 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $593Free CancellationRating
7.4
9,404 reviews
Search United Airlines flights
LufthansaPriceFrom $663Free CancellationRating
6.8
7,833 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
Braga
Matosinhos
Aveiro
Esposende
Lamego
Guimarães
Pinhao
Chaves
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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