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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 8/16. 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
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
6:00 am - 9:30 am
DEN
-
OPO
20h 30m
1 stop
United Airlines Logo
6:00 am - 4:00 pm
OPO
-
DEN
17h 00m
1 stop
$707United Airlines
Sun, Nov 8 - Tue, Nov 17
United Airlines Logo
11:50 pm - 9:30 am
DEN
-
OPO
26h 40m
2 stops
United Airlines Logo
6:00 am - 4:00 pm
OPO
-
DEN
17h 00m
1 stop
$712United Airlines
Sun, Nov 8 - Tue, Nov 17
United Airlines Logo
9:40 am - 9:30 am
DEN
-
OPO
16h 50m
2 stops
United Airlines Logo
12:30 pm - 11:03 pm
OPO
-
DEN
17h 33m
2 stops
$722United Airlines
Sun, Nov 8 - Tue, Nov 17
Multiple Airlines Logo
7:50 pm - 7:00 am
DEN
-
OPO
28h 10m
2 stops
Multiple Airlines Logo
6:00 am - 3:40 pm
OPO
-
DEN
16h 40m
1 stop
$799Multiple Airlines
Mon, Sep 21 - Thu, Oct 8
Multiple Airlines Logo
9:40 am - 7:00 am
DEN
-
OPO
14h 20m
1 stop
Multiple Airlines Logo
6:00 am - 3:40 pm
OPO
-
DEN
16h 40m
1 stop
$801Multiple Airlines
Mon, Sep 21 - Thu, Oct 8
Multiple Airlines Logo
11:25 am - 7:00 am
DEN
-
OPO
12h 35m
1 stop
Multiple Airlines Logo
6:20 am - 2:20 pm
OPO
-
DEN
15h 00m
1 stop
$805Multiple Airlines
Wed, Oct 7 - Tue, Oct 13
United Airlines Logo
9:40 am - 7:00 am
DEN
-
OPO
14h 20m
1 stop
United Airlines Logo
12:15 pm - 12:45 pm
OPO
-
DEN
31h 30m
2 stops
$818United Airlines
Wed, Sep 30 - Tue, Oct 13
United Airlines Logo
11:25 am - 7:00 am
DEN
-
OPO
12h 35m
1 stop
United Airlines Logo
6:00 am - 3:40 pm
OPO
-
DEN
16h 40m
1 stop
$819United Airlines
Tue, Sep 29 - Thu, Oct 8
United Airlines Logo
11:25 am - 7:00 am
DEN
-
OPO
12h 35m
1 stop
United Airlines Logo
6:00 am - 3:40 pm
OPO
-
DEN
16h 40m
1 stop
$820United Airlines
Tue, Sep 29 - Thu, Oct 8
Multiple Airlines Logo
11:25 am - 7:00 am
DEN
-
OPO
12h 35m
1 stop
Multiple Airlines Logo
6:20 am - 2:20 pm
OPO
-
DEN
15h 00m
1 stop
$821Multiple Airlines
Wed, Sep 30 - Tue, Oct 13

Turkish Airlines flights from Denver to Porto

Our best Turkish Airlines deals on Denver to Porto flight tickets
Turkish Airlines
Oct 1
DEN8:25 pmDenver Intl
30h 20m
1 stop
OPO9:45 amPorto
Oct 19
OPO4:50 pmPorto
32h 35m
1 stop
DEN6:25 pmDenver Intl
$826
Turkish Airlines
Sep 10
DEN8:25 pmDenver Intl
30h 20m
1 stop
OPO9:45 amPorto
Sep 19
OPO10:45 amPorto
38h 40m
1 stop
DEN6:25 pmDenver Intl
$843
Turkish Airlines
Aug 27
DEN8:25 pmDenver Intl
36h 15m
1 stop
OPO3:40 pmPorto
Sep 11
OPO4:45 pmPorto
32h 40m
1 stop
DEN6:25 pmDenver Intl
$846

Air Canada flights from Denver to Porto

Our best Air Canada deals on Denver to Porto flight tickets
Air Canada
Sep 30
DEN11:25 amDenver Intl
12h 35m
1 stop
OPO7:00 amPorto
Oct 13
OPO12:15 pmPorto
31h 30m
2 stops
DEN12:45 pmDenver Intl
$817
Air Canada
Sep 21
DEN10:02 amDenver Intl
13h 58m
2 stops
OPO7:00 amPorto
Oct 8
OPO6:00 amPorto
24h 08m
2 stops
DEN11:08 pmDenver Intl
$827
Air Canada
Oct 9
DEN9:40 amDenver Intl
14h 30m
1 stop
OPO7:10 amPorto
Oct 16
OPO6:00 amPorto
24h 08m
2 stops
DEN11:08 pmDenver Intl
$879

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 May 20, 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

Sun 11/8

6:00 am-9:30 am

1 stop20h 30m

Porto

Tue 11/17

6:00 am-4:00 pm

1 stop17h 00m

$707

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/8

11:50 pm-9:30 am

2 stops26h 40m

Porto

Tue 11/17

6:00 am-4:00 pm

1 stop17h 00m

$712

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/8

9:40 am-9:30 am

2 stops16h 50m

Porto

Tue 11/17

12:30 pm-11:03 pm

2 stops17h 33m

$722

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 9/21

7:50 pm-7:00 am

2 stops28h 10m

Porto

Thu 10/8

6:00 am-3:40 pm

1 stop16h 40m

$799

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 9/21

9:40 am-7:00 am

1 stop14h 20m

Porto

Thu 10/8

6:00 am-3:40 pm

1 stop16h 40m

$801
Quickest round-trip

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 10/7

11:25 am-7:00 am

1 stop12h 35m

Porto

Tue 10/13

6:20 am-2:20 pm

1 stop15h 00m

$805

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 9/30

9:40 am-7:00 am

1 stop14h 20m

Porto

Tue 10/13

12:15 pm-12:45 pm

2 stops31h 30m

$818

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 9/29

11:25 am-7:00 am

1 stop12h 35m

Porto

Thu 10/8

6:00 am-3:40 pm

1 stop16h 40m

$819

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 9/29

11:25 am-7:00 am

1 stop12h 35m

Porto

Thu 10/8

6:00 am-3:40 pm

1 stop16h 40m

$820

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 9/30

11:25 am-7:00 am

1 stop12h 35m

Porto

Tue 10/13

6:20 am-2:20 pm

1 stop15h 00m

$821

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 $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 $800.

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 $983 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 $798 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
9,736 reviews
Search United Airlines flights
LufthansaPriceFrom $663Free CancellationRating
6.8
8,015 reviews
Search Lufthansa flights
Air CanadaPriceFrom $696Free CancellationRating
7.1
11,065 reviews
Search Air Canada flights
Turkish AirlinesPriceFrom $701Free CancellationRating
7.4
4,379 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
Lamego
Esposende
Chaves
Pinhao
Espinho
Guimarães
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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