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Cheap flights from Denver to Porto from $327

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 11/8. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Denver to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
4:15 pm - 12:50 pm
DEN
-
OPO
13h 35m
1 stop
Lufthansa Logo
6:00 am - 3:35 pm
OPO
-
DEN
16h 35m
1 stop
$696Lufthansa
Sun, Nov 8 - Thu, Dec 3
United Airlines Logo
8:00 am - 9:30 am
DEN
-
OPO
19h 30m
1 stop
United Airlines Logo
6:00 am - 3:35 pm
OPO
-
DEN
16h 35m
1 stop
$706United Airlines
Wed, Oct 28 - Fri, Nov 6
United Airlines Logo
8:00 am - 9:30 am
DEN
-
OPO
18h 30m
1 stop
United Airlines Logo
6:00 am - 3:35 pm
OPO
-
DEN
16h 35m
1 stop
$707United Airlines
Sun, Nov 8 - Fri, Dec 4
Multiple Airlines Logo
4:15 pm - 12:50 pm
DEN
-
OPO
13h 35m
1 stop
Multiple Airlines Logo
6:00 am - 6:03 pm
OPO
-
DEN
19h 03m
2 stops
$709Multiple Airlines
Sun, Nov 8 - Thu, Dec 3
Multiple Airlines Logo
11:59 pm - 9:30 am
DEN
-
OPO
26h 31m
2 stops
Multiple Airlines Logo
6:00 am - 3:35 pm
OPO
-
DEN
16h 35m
1 stop
$711Multiple Airlines
Sun, Nov 8 - Tue, Nov 17
Air Canada Logo
11:15 am - 12:50 pm
DEN
-
OPO
18h 35m
2 stops
Air Canada Logo
6:00 am - 6:03 pm
OPO
-
DEN
19h 03m
2 stops
$712Air Canada
Sun, Nov 8 - Thu, Dec 3
Lufthansa Logo
5:15 pm - 12:50 pm
DEN
-
OPO
13h 35m
1 stop
Lufthansa Logo
6:00 am - 3:35 pm
OPO
-
DEN
16h 35m
1 stop
$714Lufthansa
Tue, Oct 27 - Fri, Nov 6
Multiple Airlines Logo
4:15 pm - 12:50 pm
DEN
-
OPO
13h 35m
1 stop
Multiple Airlines Logo
7:20 pm - 8:27 pm
OPO
-
DEN
32h 07m
2 stops
$715Multiple Airlines
Sun, Nov 8 - Wed, Nov 18
Lufthansa Logo
4:15 pm - 12:50 pm
DEN
-
OPO
13h 35m
1 stop
Lufthansa Logo
4:10 pm - 3:35 pm
OPO
-
DEN
30h 25m
1 stop
$716Lufthansa
Sun, Nov 8 - Wed, Nov 18
Delta Logo
6:30 am - 8:05 am
DEN
-
OPO
19h 35m
1 stop
Delta Logo
5:00 am - 5:08 pm
OPO
-
DEN
19h 08m
2 stops
$718Delta
Wed, Oct 28 - Tue, Nov 3

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United Airlines flights from Denver to Porto

Our best United Airlines deals on Denver to Porto flight tickets
United Airlines
Oct 28
DEN8:00 amDenver Intl
19h 30m
1 stop
OPO9:30 amPorto
Nov 6
OPO6:00 amPorto
16h 35m
1 stop
DEN3:35 pmDenver Intl
$706
United Airlines
Nov 8
DEN8:00 amDenver Intl
18h 30m
1 stop
OPO9:30 amPorto
Dec 4
OPO6:00 amPorto
16h 35m
1 stop
DEN3:35 pmDenver Intl
$707
United Airlines
Oct 28
DEN8:00 amDenver Intl
19h 30m
1 stop
OPO9:30 amPorto
Nov 4
OPO12:35 pmPorto
14h 30m
1 stop
DEN8:05 pmDenver Intl
$726

Delta flights from Denver to Porto

Our best Delta deals on Denver to Porto flight tickets
Delta
Oct 28
DEN6:30 amDenver Intl
19h 35m
1 stop
OPO8:05 amPorto
Nov 3
OPO5:00 amPorto
19h 08m
2 stops
DEN5:08 pmDenver Intl
$718
Delta
Oct 27
DEN6:10 amDenver Intl
22h 25m
2 stops
OPO10:35 amPorto
Nov 5
OPO5:00 amPorto
19h 00m
2 stops
DEN5:00 pmDenver Intl
$722
Delta
Oct 27
DEN5:35 pmDenver Intl
32h 30m
1 stop
OPO8:05 amPorto
Nov 5
OPO5:00 amPorto
19h 00m
2 stops
DEN5:00 pmDenver Intl
$723

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 July 1, 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
Quickest round-trip

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/8

4:15 pm-12:50 pm

1 stop13h 35m

Porto

Thu 12/3

6:00 am-3:35 pm

1 stop16h 35m

$696

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 10/28

8:00 am-9:30 am

1 stop19h 30m

Porto

Fri 11/6

6:00 am-3:35 pm

1 stop16h 35m

$706

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/8

8:00 am-9:30 am

1 stop18h 30m

Porto

Fri 12/4

6:00 am-3:35 pm

1 stop16h 35m

$707

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/8

4:15 pm-12:50 pm

1 stop13h 35m

Porto

Thu 12/3

6:00 am-6:03 pm

2 stops19h 03m

$709

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/8

11:59 pm-9:30 am

2 stops26h 31m

Porto

Tue 11/17

6:00 am-3:35 pm

1 stop16h 35m

$711

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/8

11:15 am-12:50 pm

2 stops18h 35m

Porto

Thu 12/3

6:00 am-6:03 pm

2 stops19h 03m

$712

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 10/27

5:15 pm-12:50 pm

1 stop13h 35m

Porto

Fri 11/6

6:00 am-3:35 pm

1 stop16h 35m

$714

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/8

4:15 pm-12:50 pm

1 stop13h 35m

Porto

Wed 11/18

7:20 pm-8:27 pm

2 stops32h 07m

$715

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/8

4:15 pm-12:50 pm

1 stop13h 35m

Porto

Wed 11/18

4:10 pm-3:35 pm

1 stop30h 25m

$716

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 10/28

6:30 am-8:05 am

1 stop19h 35m

Porto

Tue 11/3

5:00 am-5:08 pm

2 stops19h 08m

$718

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 $757. If you aren’t able to travel during the month of February, then book flights to Porto from Denver during October instead. Flights to Porto in October, while not as cheap as those in February, still average around $839.

How far in advance should I book a flight from Denver 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 $999 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 $835 on momondo.

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
9,920 reviews
Search United Airlines flights
LufthansaPriceFrom $597Free CancellationRating
6.8
8,107 reviews
Search Lufthansa flights
Air CanadaPriceFrom $700Free CancellationRating
7.1
11,286 reviews
Search Air Canada flights
Turkish AirlinesPriceFrom $701Free CancellationRating
7.4
4,432 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
Esposende
Lamego
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Ponte de Lima
Viseu
Curia
Mesao Frio
Penafiel
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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