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Cheap flights from Denver to Porto from $301

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 4/7. 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
5:40 pm - 10:50 pm
DEN
-
OPO
22h 10m
1 stop
Multiple Airlines Logo
8:40 am - 8:28 pm
OPO
-
DEN
18h 48m
2 stops
$494Multiple Airlines
Mon, May 4 - Fri, May 8
Lufthansa Logo
5:40 pm - 10:50 pm
DEN
-
OPO
22h 10m
1 stop
Lufthansa Logo
6:00 am - 3:40 pm
OPO
-
DEN
16h 40m
1 stop
$504Lufthansa
Mon, May 4 - Fri, May 8
Lufthansa Logo
5:40 pm - 11:00 pm
DEN
-
OPO
22h 20m
1 stop
Lufthansa Logo
6:00 am - 3:40 pm
OPO
-
DEN
16h 40m
1 stop
$506Lufthansa
Mon, May 4 - Fri, May 8
Multiple Airlines Logo
5:40 pm - 10:50 pm
DEN
-
OPO
22h 10m
1 stop
Multiple Airlines Logo
8:40 am - 9:08 pm
OPO
-
DEN
19h 28m
2 stops
$510Multiple Airlines
Mon, May 4 - Fri, May 8
Lufthansa Logo
5:40 pm - 11:00 pm
DEN
-
OPO
22h 20m
1 stop
Lufthansa Logo
6:00 am - 11:30 pm
OPO
-
DEN
24h 30m
2 stops
$516Lufthansa
Mon, May 4 - Fri, May 8
Iberia Logo
2:39 pm - 4:00 pm
DEN
-
OPO
18h 21m
2 stops
Iberia Logo
12:25 pm - 11:45 pm
OPO
-
DEN
18h 20m
2 stops
$525Iberia
Mon, May 4 - Fri, May 8
Multiple Airlines Logo
4:05 pm - 11:25 pm
DEN
-
OPO
24h 20m
1 stop
Multiple Airlines Logo
6:00 am - 11:10 pm
OPO
-
DEN
24h 10m
2 stops
$536Multiple Airlines
Mon, Apr 27 - Thu, May 7
Multiple Airlines Logo
4:05 pm - 11:25 pm
DEN
-
OPO
24h 20m
1 stop
Multiple Airlines Logo
6:00 am - 10:18 am
OPO
-
DEN
35h 18m
2 stops
$538Multiple Airlines
Tue, Apr 7 - Tue, Apr 14
United Airlines Logo
12:46 pm - 9:30 am
DEN
-
OPO
13h 44m
1 stop
United Airlines Logo
6:00 am - 5:00 pm
OPO
-
DEN
17h 00m
1 stop
$549United Airlines
Tue, Mar 3 - Tue, Mar 10
Lufthansa Logo
4:05 pm - 11:25 pm
DEN
-
OPO
24h 20m
1 stop
Lufthansa Logo
6:00 am - 3:40 pm
OPO
-
DEN
16h 40m
1 stop
$551Lufthansa
Tue, Apr 7 - Tue, Apr 14

British Airways flights from Denver to Porto

Our best British Airways deals on Denver to Porto flight tickets
British Airways
Mar 2
DEN4:43 pmDenver Intl
17h 52m
2 stops
OPO5:35 pmPorto
Mar 9
OPO8:40 pmPorto
25h 14m
2 stops
DEN3:54 pmDenver Intl
$577
British Airways
May 5
DEN10:37 amDenver Intl
25h 53m
2 stops
OPO7:30 pmPorto
May 15
OPO8:20 amPorto
22h 25m
2 stops
DEN11:45 pmDenver Intl
$596
British Airways
May 2
DEN6:40 pmDenver Intl
18h 55m
1 stop
OPO8:35 pmPorto
May 7
OPO7:55 pmPorto
27h 35m
1 stop
DEN4:30 pmDenver Intl
$597

SWISS flights from Denver to Porto

Our best SWISS deals on Denver to Porto flight tickets
SWISS
May 3
DEN5:35 pmDenver Intl
31h 20m
2 stops
OPO7:55 amPorto
May 8
OPO8:40 amPorto
19h 28m
2 stops
DEN9:08 pmDenver Intl
$615
SWISS
May 4
DEN5:35 pmDenver Intl
37h 10m
2 stops
OPO1:45 pmPorto
May 8
OPO8:40 amPorto
19h 28m
2 stops
DEN9:08 pmDenver Intl
$629

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 February 3, 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 5/4

5:40 pm-10:50 pm

1 stop22h 10m

Porto

Fri 5/8

8:40 am-8:28 pm

2 stops18h 48m

$494

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 5/4

5:40 pm-10:50 pm

1 stop22h 10m

Porto

Fri 5/8

6:00 am-3:40 pm

1 stop16h 40m

$504

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 5/4

5:40 pm-11:00 pm

1 stop22h 20m

Porto

Fri 5/8

6:00 am-3:40 pm

1 stop16h 40m

$506

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 5/4

5:40 pm-10:50 pm

1 stop22h 10m

Porto

Fri 5/8

8:40 am-9:08 pm

2 stops19h 28m

$510

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 5/4

5:40 pm-11:00 pm

1 stop22h 20m

Porto

Fri 5/8

6:00 am-11:30 pm

2 stops24h 30m

$516

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 5/4

2:39 pm-4:00 pm

2 stops18h 21m

Porto

Fri 5/8

12:25 pm-11:45 pm

2 stops18h 20m

$525

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 4/27

4:05 pm-11:25 pm

1 stop24h 20m

Porto

Thu 5/7

6:00 am-11:10 pm

2 stops24h 10m

$536

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/7

4:05 pm-11:25 pm

1 stop24h 20m

Porto

Tue 4/14

6:00 am-10:18 am

2 stops35h 18m

$538

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 3/3

12:46 pm-9:30 am

1 stop13h 44m

Porto

Tue 3/10

6:00 am-5:00 pm

1 stop17h 00m

$549

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/7

4:05 pm-11:25 pm

1 stop24h 20m

Porto

Tue 4/14

6:00 am-3:40 pm

1 stop16h 40m

$551

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 March is, on average, the cheapest month to fly to Porto from Denver, with most prices found around $794. If you aren’t able to travel during the month of March, then book flights to Porto from Denver during November instead. Flights to Porto in November, while not as cheap as those in March, 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 $976 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 59% 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 25m

Direct flights

None
The fastest flight from Denver to Porto takes 12h 25m
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 25m, 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
4,210 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $593Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
LufthansaPriceFrom $641Free CancellationRating
6.8
7,759 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
Aveiro
Matosinhos
Esposende
Lamego
Guimarães
Espinho
Chaves
Pinhao
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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