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Cheap flights from Denver to Porto from $226

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 3/22. 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.
United Airlines Logo
11:59 pm - 9:30 am
DEN
-
OPO
26h 31m
1 stop
United Airlines Logo
12:35 pm - 12:32 am
OPO
-
DEN
17h 57m
2 stops
$439United Airlines
Mon, Feb 23 - Tue, Mar 10
Multiple Airlines Logo
4:05 pm - 11:25 pm
DEN
-
OPO
24h 20m
1 stop
Multiple Airlines Logo
8:40 am - 11:10 pm
OPO
-
DEN
21h 30m
2 stops
$443Multiple Airlines
Mon, Apr 27 - Tue, May 5
United Airlines Logo
12:46 pm - 9:30 am
DEN
-
OPO
13h 44m
1 stop
United Airlines Logo
12:35 pm - 9:56 pm
OPO
-
DEN
16h 21m
1 stop
$446United Airlines
Wed, Feb 25 - Wed, Mar 4
British Airways Logo
4:43 pm - 5:35 pm
DEN
-
OPO
17h 52m
2 stops
British Airways Logo
8:40 pm - 10:37 pm
OPO
-
DEN
31h 57m
2 stops
$456British Airways
Mon, Feb 23 - Tue, Mar 10
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
$462Lufthansa
Mon, Apr 27 - Tue, May 5
Multiple Airlines Logo
11:40 am - 9:30 am
DEN
-
OPO
15h 50m
1 stop
Multiple Airlines Logo
11:05 am - 2:20 pm
OPO
-
DEN
34h 15m
1 stop
$470Multiple Airlines
Mon, Mar 23 - Tue, Mar 31
Air Canada Logo
1:25 pm - 12:50 pm
DEN
-
OPO
17h 25m
2 stops
Air Canada Logo
8:40 am - 10:15 am
OPO
-
DEN
32h 35m
2 stops
$475Air Canada
Mon, Mar 23 - Tue, Mar 31
Multiple Airlines Logo
4:05 pm - 11:25 pm
DEN
-
OPO
24h 20m
1 stop
Multiple Airlines Logo
7:20 pm - 3:56 pm
OPO
-
DEN
27h 36m
2 stops
$476Multiple Airlines
Mon, Apr 27 - Mon, May 4
British Airways Logo
6:40 pm - 9:05 am
DEN
-
OPO
31h 25m
1 stop
British Airways Logo
9:10 pm - 4:30 pm
OPO
-
DEN
26h 20m
1 stop
$482British Airways
Tue, Apr 14 - Mon, May 4
SWISS Logo
4:15 pm - 7:55 am
DEN
-
OPO
32h 40m
2 stops
SWISS Logo
7:20 pm - 4:50 pm
OPO
-
DEN
28h 30m
2 stops
$484SWISS
Tue, Apr 14 - Mon, May 4

United Airlines flights from Denver to Porto

Our best United Airlines deals on Denver to Porto flight tickets
United Airlines
Feb 23
DEN11:59 pmDenver Intl
26h 31m
1 stop
OPO9:30 amPorto
Mar 10
OPO12:35 pmPorto
15h 04m
1 stop
DEN9:39 pmDenver Intl
$439
United Airlines
Feb 25
DEN12:46 pmDenver Intl
13h 44m
1 stop
OPO9:30 amPorto
Mar 4
OPO12:35 pmPorto
16h 21m
1 stop
DEN9:56 pmDenver Intl
$446
United Airlines
Feb 21
DEN11:59 pmDenver Intl
26h 31m
2 stops
OPO9:30 amPorto
Mar 11
OPO12:35 pmPorto
15h 04m
1 stop
DEN9:39 pmDenver Intl
$475

British Airways flights from Denver to Porto

Our best British Airways deals on Denver to Porto flight tickets
British Airways
Feb 23
DEN4:43 pmDenver Intl
17h 52m
2 stops
OPO5:35 pmPorto
Mar 10
OPO8:40 pmPorto
31h 57m
2 stops
DEN10:37 pmDenver Intl
$456
British Airways
Apr 14
DEN6:40 pmDenver Intl
31h 25m
1 stop
OPO9:05 amPorto
May 4
OPO9:10 pmPorto
26h 20m
1 stop
DEN4:30 pmDenver Intl
$482
British Airways
Apr 14
DEN10:36 amDenver Intl
25h 54m
2 stops
OPO7:30 pmPorto
May 4
OPO9:10 pmPorto
26h 20m
1 stop
DEN4:30 pmDenver Intl
$487

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 January 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

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 2/23

11:59 pm-9:30 am

1 stop26h 31m

Porto

Tue 3/10

12:35 pm-12:32 am

2 stops17h 57m

$439

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 4/27

4:05 pm-11:25 pm

1 stop24h 20m

Porto

Tue 5/5

8:40 am-11:10 pm

2 stops21h 30m

$443

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 2/25

12:46 pm-9:30 am

1 stop13h 44m

Porto

Wed 3/4

12:35 pm-9:56 pm

1 stop16h 21m

$446

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 2/23

4:43 pm-5:35 pm

2 stops17h 52m

Porto

Tue 3/10

8:40 pm-10:37 pm

2 stops31h 57m

$456

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 4/27

4:05 pm-11:25 pm

1 stop24h 20m

Porto

Tue 5/5

6:20 am-2:20 pm

1 stop15h 00m

$462

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 3/23

11:40 am-9:30 am

1 stop15h 50m

Porto

Tue 3/31

11:05 am-2:20 pm

1 stop34h 15m

$470

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 3/23

1:25 pm-12:50 pm

2 stops17h 25m

Porto

Tue 3/31

8:40 am-10:15 am

2 stops32h 35m

$475

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 4/27

4:05 pm-11:25 pm

1 stop24h 20m

Porto

Mon 5/4

7:20 pm-3:56 pm

2 stops27h 36m

$476

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/14

6:40 pm-9:05 am

1 stop31h 25m

Porto

Mon 5/4

9:10 pm-4:30 pm

1 stop26h 20m

$482

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/14

4:15 pm-7:55 am

2 stops32h 40m

Porto

Mon 5/4

7:20 pm-4:50 pm

2 stops28h 30m

$484

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 November is, on average, the cheapest month to fly to Porto from Denver, with most prices found around $800. If you aren’t able to travel during the month of November, then book flights to Porto from Denver during March instead. Flights to Porto in March, while not as cheap as those in November, still average around $805.

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 $790 on momondo.

Can stopping save me money on Denver to Porto flights?

You could potentially save up to 26% 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

14h 10m

Direct flights

None
The fastest flight from Denver to Porto takes 14h 10m
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 14h 10m, 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
4,167 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $641Free CancellationRating
6.8
7,711 reviews
Search Lufthansa flights
United AirlinesPriceFrom $671Free CancellationRating
7.4
9,156 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
Matosinhos
Aveiro
Esposende
Lamego
Guimarães
Chaves
Espinho
Pinhao
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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