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Cheap flights from Denver to Porto from $326

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 10/1. 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.
Multiple Airlines Logo
11:20 am - 12:50 pmDEN  Denver Intl-OPO Porto
18h 30m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss
Multiple Airlines Logo
6:15 am - 2:30 pmOPO  Porto-DEN Denver Intl
15h 15m1 stop Munich Franz Josef Strauss
$683Multiple Airlines
Sun, Nov 15 - Fri, Nov 20
Multiple Airlines Logo
1:30 pm - 12:50 pmDEN  Denver Intl-OPO Porto
16h 20m2 stops Toronto Pearson Intl Munich Franz Josef Strauss
Multiple Airlines Logo
6:00 am - 6:13 pmOPO  Porto-DEN Denver Intl
19h 13m2 stops Frankfurt am Main Vancouver Intl
$686Multiple Airlines
Sun, Nov 15 - Fri, Nov 20
Lufthansa Logo
4:15 pm - 12:50 pmDEN  Denver Intl-OPO Porto
13h 35m1 stop Munich Franz Josef Strauss
Lufthansa Logo
6:15 am - 2:30 pmOPO  Porto-DEN Denver Intl
15h 15m1 stop Munich Franz Josef Strauss
$691Lufthansa
Sun, Nov 15 - Fri, Nov 20
Lufthansa Logo
5:25 pm - 3:20 pmDEN  Denver Intl-OPO Porto
14h 55m1 stop Frankfurt am Main
Lufthansa Logo
6:00 am - 3:35 pmOPO  Porto-DEN Denver Intl
16h 35m1 stop Frankfurt am Main
$703Lufthansa
Wed, Nov 18 - Fri, Dec 4
Air Canada Logo
11:20 am - 12:50 pmDEN  Denver Intl-OPO Porto
18h 30m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss
Air Canada Logo
6:15 am - 10:30 amOPO  Porto-DEN Denver Intl
35h 15m2 stops Munich Franz Josef Strauss Toronto Pearson Intl
$723Air Canada
Wed, Nov 18 - Fri, Dec 4
United Airlines Logo
10:20 am - 9:30 amDEN  Denver Intl-OPO Porto
16h 10m1 stop Newark
United Airlines Logo
12:35 pm - 9:25 pmOPO  Porto-DEN Denver Intl
15h 50m1 stop Newark
$776United Airlines
Wed, Dec 9 - Sun, Dec 13
United Airlines Logo
11:59 pm - 9:30 amDEN  Denver Intl-OPO Porto
26h 31m2 stops Washington, D.C. Dulles Intl Newark
United Airlines Logo
12:35 pm - 12:19 amOPO  Porto-DEN Denver Intl
18h 44m2 stops Newark Washington, D.C. Dulles Intl
$781United Airlines
Sat, Nov 14 - Sun, Nov 22
Air Canada Logo
9:40 am - 7:00 amDEN  Denver Intl-OPO Porto
14h 20m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
6:00 am - 8:37 amOPO  Porto-DEN Denver Intl
32h 37m2 stops Frankfurt am Main Calgary
$816Air Canada
Tue, Oct 13 - Tue, Oct 27
Delta Logo
8:00 am - 9:05 amDEN  Denver Intl-OPO Porto
18h 05m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl
Delta Logo
5:00 am - 8:22 pmOPO  Porto-DEN Denver Intl
22h 22m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson
$833Delta
Wed, Nov 4 - Sat, Nov 14
Delta Logo
5:40 pm - 3:25 pmDEN  Denver Intl-OPO Porto
14h 45m1 stop Paris Charles de Gaulle
Delta Logo
5:00 am - 8:13 pmOPO  Porto-DEN Denver Intl
22h 13m2 stops Amsterdam Schiphol New York John F Kennedy Intl
$876Delta
Wed, Sep 30 - Tue, Oct 13

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Lufthansa flights from Denver to Porto

Our best Lufthansa deals on Denver to Porto flight tickets
Lufthansa
Nov 15
DEN4:15 pmDenver Intl
13h 35m
1 stop
OPO12:50 pmPorto
Nov 20
OPO6:15 amPorto
15h 15m
1 stop
DEN2:30 pmDenver Intl
$691
Lufthansa
Nov 18
DEN5:25 pmDenver Intl
14h 55m
1 stop
OPO3:20 pmPorto
Nov 26
OPO6:00 amPorto
16h 35m
1 stop
DEN3:35 pmDenver Intl
$703
Lufthansa
Nov 15
DEN4:15 pmDenver Intl
13h 35m
1 stop
OPO12:50 pmPorto
Nov 22
OPO6:15 amPorto
15h 15m
1 stop
DEN2:30 pmDenver Intl
$739

Air Canada flights from Denver to Porto

Our best Air Canada deals on Denver to Porto flight tickets
Air Canada
Nov 18
DEN11:20 amDenver Intl
18h 30m
2 stops
OPO12:50 pmPorto
Dec 4
OPO6:15 amPorto
35h 15m
2 stops
DEN10:30 amDenver Intl
$723
Air Canada
Oct 13
DEN9:40 amDenver Intl
14h 20m
1 stop
OPO7:00 amPorto
Oct 27
OPO6:00 amPorto
32h 37m
2 stops
DEN8:37 amDenver Intl
$816
Air Canada
Nov 25
DEN1:30 pmDenver Intl
16h 20m
2 stops
OPO12:50 pmPorto
Nov 29
OPO6:15 amPorto
37h 23m
2 stops
DEN12:38 pmDenver Intl
$836

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 August 17, 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 Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 11/15

11:20 am-12:50 pm

2 stops18h 30m

Porto

Fri 11/20

6:15 am-2:30 pm

1 stop15h 15m

$683

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 11/15

1:30 pm-12:50 pm

2 stops16h 20m

Porto

Fri 11/20

6:00 am-6:13 pm

2 stops19h 13m

$686
Quickest round-trip

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 11/15

4:15 pm-12:50 pm

1 stop13h 35m

Porto

Fri 11/20

6:15 am-2:30 pm

1 stop15h 15m

$691

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Wed 11/18

5:25 pm-3:20 pm

1 stop14h 55m

Porto

Fri 12/4

6:00 am-3:35 pm

1 stop16h 35m

$703

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Wed 11/18

11:20 am-12:50 pm

2 stops18h 30m

Porto

Fri 12/4

6:15 am-10:30 am

2 stops35h 15m

$723

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Wed 12/9

10:20 am-9:30 am

1 stop16h 10m

Porto

Sun 12/13

12:35 pm-9:25 pm

1 stop15h 50m

$776

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sat 11/14

11:59 pm-9:30 am

2 stops26h 31m

Porto

Sun 11/22

12:35 pm-12:19 am

2 stops18h 44m

$781

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Tue 10/13

9:40 am-7:00 am

1 stop14h 20m

Porto

Tue 10/27

6:00 am-8:37 am

2 stops32h 37m

$816

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Wed 11/4

8:00 am-9:05 am

2 stops18h 05m

Porto

Sat 11/14

5:00 am-8:22 pm

2 stops22h 22m

$833

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Wed 9/30

5:40 pm-3:25 pm

1 stop14h 45m

Porto

Tue 10/13

5:00 am-8:13 pm

2 stops22h 13m

$876

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?

Prices are currently low for flights on this route.

Typical prices usually range from $834 to $1,019.
The lowest price recently found on this route was $683.

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 November instead. Flights to Porto in November, while not as cheap as those in February, still average around $809.

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 $973 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

Best Price Found

$326

Fastest flight time

12h 35m

Direct flights

None
The best one-way flight to Porto from Denver in the past 72 hours is $326. The best round-trip flight deal from Denver to Porto found on momondo in the last 72 hours is $683.
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
10,106 reviews
Search United Airlines flights
LufthansaPriceFrom $663Free CancellationRating
6.8
8,194 reviews
Search Lufthansa flights
Air CanadaPriceFrom $700Free CancellationRating
7.1
11,483 reviews
Search Air Canada flights
Turkish AirlinesPriceFrom $701Free CancellationRating
7.4
4,473 reviews
Search Turkish Airlines flights
DeltaPriceFrom $764Free CancellationRating
7.8
8,504 reviews
Search Delta 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
Pinhao
Matosinhos
Esposende
Chaves
Arcos de Valdevez
Viseu
Espinho
Guimarães
Lamego
Ponte de Lima
Mesao Frio
Penafiel
Caminha
Baiao
Mira

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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