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Cheap flights from Denver to Porto from $354

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 10/8. 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
0 bags

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Cheap round-trip flights

 Logo
11:15 am - 12:50 pmDEN-OPO
18h 35m2 stops
 Logo
6:00 am - 4:00 pmOPO-DEN
17h 00m1 stop
Sun, Nov 9 - Tue, Nov 18
Lufthansa Logo
5:50 pm - 10:25 pmDEN-OPO
21h 35m1 stop
Lufthansa Logo
6:00 am - 4:00 pmOPO-DEN
17h 00m1 stop
$602Lufthansa
Find Deal
Sun, Nov 9 - Tue, Nov 18
United Airlines Logo
5:50 pm - 2:45 pmDEN-OPO
13h 55m1 stop
United Airlines Logo
12:30 pm - 4:00 pmOPO-DEN
34h 30m1 stop
$622United Airlines
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Tue, Nov 25 - Mon, Dec 1
KLM Logo
10:50 am - 10:50 amDEN-OPO
17h 00m2 stops
KLM Logo
4:10 pm - 6:09 pmOPO-DEN
32h 59m2 stops
$632KLM
Find Deal
Tue, Nov 25 - Mon, Dec 1
Delta Logo
12:45 pm - 3:30 pmDEN-OPO
19h 45m2 stops
Delta Logo
5:00 am - 5:29 pmOPO-DEN
18h 29m2 stops
$741Delta
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Fri, Oct 24 - Sat, Nov 1
KLM Logo
5:40 pm - 9:35 pmDEN-OPO
20h 55m1 stop
KLM Logo
6:35 am - 3:30 pmOPO-DEN
15h 55m1 stop
$773KLM
Find Deal
Sun, Aug 10 - Tue, Aug 19
Turkish Airlines Logo
7:50 pm - 3:50 pmDEN-OPO
37h 00m1 stop
Turkish Airlines Logo
4:50 pm - 5:55 pmOPO-DEN
32h 05m1 stop
$789Turkish Airlines
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Tue, Sep 30 - Mon, Oct 13
United Airlines Logo
9:43 am - 7:05 amDEN-OPO
14h 22m1 stop
United Airlines Logo
12:10 pm - 2:45 pmOPO-DEN
33h 35m2 stops
$790United Airlines
Find Deal
Thu, Aug 21 - Thu, Aug 28
Delta Logo
12:55 am - 10:40 amDEN-OPO
26h 45m2 stops
Delta Logo
6:35 am - 10:55 pmOPO-DEN
23h 20m2 stops
$810Delta
Find Deal
Sun, Aug 10 - Tue, Aug 26
Turkish Airlines Logo
7:20 pm - 3:10 pmDEN-OPO
36h 50m1 stop
Turkish Airlines Logo
4:10 pm - 5:35 pmOPO-DEN
32h 25m1 stop
$859Turkish Airlines
Find Deal
Sat, Dec 6 - Wed, Dec 10

Delta flights from Denver to Porto

Our best Delta deals on Denver to Porto flight tickets
Delta
Oct 24
DEN12:45 pmDenver Intl
19h 45m
2 stops
OPO3:30 pmPorto
Nov 1
OPO5:00 amPorto
18h 29m
2 stops
DEN5:29 pmDenver Intl
Delta
Aug 10
DEN12:55 amDenver Intl
26h 45m
2 stops
OPO10:40 amPorto
Aug 26
OPO6:35 amPorto
23h 20m
2 stops
DEN10:55 pmDenver Intl
Delta
Sep 17
DEN12:05 pmDenver Intl
20h 25m
2 stops
OPO3:30 pmPorto
Sep 26
OPO9:20 amPorto
21h 25m
2 stops
DEN11:45 pmDenver Intl

Lufthansa flights from Denver to Porto

Our best Lufthansa deals on Denver to Porto flight tickets
Lufthansa
Nov 9
DEN5:50 pmDenver Intl
21h 35m
1 stop
OPO10:25 pmPorto
Nov 18
OPO6:00 amPorto
17h 00m
1 stop
DEN4:00 pmDenver Intl
Lufthansa
Oct 15
DEN4:15 pmDenver Intl
24h 05m
1 stop
OPO11:20 pmPorto
Oct 24
OPO6:15 amPorto
14h 30m
1 stop
DEN1:45 pmDenver Intl
Lufthansa
Oct 30
DEN5:20 pmDenver Intl
13h 30m
1 stop
OPO12:50 pmPorto
Nov 8
OPO6:00 amPorto
17h 00m
1 stop
DEN4:00 pmDenver Intl

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 January is, on average, the cheapest month to fly to Porto from Denver, with most prices found around $710. If you aren’t able to travel during the month of January, then book flights to Porto from Denver during February instead. Flights to Porto in February, while not as cheap as those in January, still average around $764.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Monday when prices can be found for as low as $1,053. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $1,233. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the evening is the cheapest time of day to fly from Denver to Porto when you can find flight prices for as low as $982. Flying to Porto in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,448 on average. Flights to Porto from Denver at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $972 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 $855 on momondo.

Can stopping save me money on Denver to Porto flights?

You could potentially save up to 5% on your flight if you consider stops on a Denver to Porto flight.

How have Denver to Porto flight prices changed over time?

As of July 2025, prices for Denver to Porto flights are approximately 21% cheaper when compared to flights at the same time last year.

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

Best Price Found

$354

Fastest flight time

13h 05m

Direct flights

None

Airports in Porto

1 airport
The best one-way flight to Porto from Denver in the past 72 hours is $354. The best round-trip flight deal from Denver to Porto found on momondo in the last 72 hours is $598.
The fastest flight from Denver to Porto takes 13h 05m
There are no direct flights from Denver to Porto. Popular non-direct route for this connection is Denver Intl Airport - Porto Airport.
There is 1 airport near Porto: Porto (OPO)

  • 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 13h 05m, 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
KLMPriceFrom $516Free CancellationRating
7.8
1,370 reviews
Search KLM flights
Turkish AirlinesPriceFrom $574Free CancellationRating
7.3
3,893 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $662Free CancellationRating
6.8
7,193 reviews
Search Lufthansa flights
DeltaPriceFrom $692Free CancellationRating
8.0
7,958 reviews
Search Delta flights
United AirlinesPriceFrom $742Free CancellationRating
7.4
8,842 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
Aveiro
Matosinhos
Caminha
Braga
Guimarães
Chaves
Esposende
Arcos de Valdevez
Lamego
Espinho
Viseu
Ponte de Lima
Santa Maria da Feira
Curia
Mesao Frio
Pinhao
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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