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Cheap flights from Colorado to Porto from $304

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Porto departing on 10/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Colorado to Porto

Cheap round-trip flights

United Airlines Logo
1:45 pm - 9:30 amDEN-OPO
12h 45m1 stop
United Airlines Logo
6:00 am - 4:00 pmOPO-DEN
17h 00m1 stop
$550United Airlines
Find Deal
mar., nov. 4 - mié., nov. 12
United Airlines Logo
7:45 am - 9:30 amDEN-OPO
18h 45m2 stops
United Airlines Logo
6:00 am - 4:00 pmOPO-DEN
17h 00m1 stop
$555United Airlines
Find Deal
mar., nov. 4 - mié., nov. 12
United Airlines Logo
7:46 am - 9:30 amDEN-OPO
18h 44m2 stops
United Airlines Logo
12:35 pm - 11:36 pmOPO-DEN
18h 01m2 stops
$568United Airlines
Find Deal
mar., nov. 4 - mié., nov. 12
Multiple Airlines Logo
3:40 pm - 9:15 pmDEN-OPO
22h 35m3 stops
Multiple Airlines Logo
6:05 am - 6:05 pmOPO-DEN
19h 00m2 stops
$593Multiple Airlines
Find Deal
sáb., dic. 6 - sáb., dic. 13
Lufthansa Logo
4:20 pm - 11:40 pmDEN-OPO
24h 20m1 stop
Lufthansa Logo
6:00 am - 4:00 pmOPO-DEN
17h 00m1 stop
$598Lufthansa
Find Deal
vie., nov. 7 - mar., nov. 18
Multiple Airlines Logo
4:20 pm - 9:15 pmDEN-OPO
21h 55m2 stops
Multiple Airlines Logo
8:25 am - 7:55 pmOPO-DEN
18h 30m2 stops
$603Multiple Airlines
Find Deal
vie., nov. 7 - mar., nov. 18
Multiple Airlines Logo
11:59 pm - 9:30 amDEN-OPO
26h 31m2 stops
Multiple Airlines Logo
6:00 am - 4:00 pmOPO-DEN
17h 00m1 stop
$605Multiple Airlines
Find Deal
vie., nov. 7 - mar., nov. 18
Lufthansa Logo
5:59 pm - 10:50 pmDEN-OPO
21h 51m1 stop
Lufthansa Logo
6:00 am - 10:00 pmOPO-DEN
23h 00m2 stops
$619Lufthansa
Find Deal
lun., oct. 13 - mar., oct. 21
KLM Logo
4:16 pm - 3:35 pmDEN-OPO
16h 19m2 stops
KLM Logo
6:15 am - 9:41 pmOPO-DEN
22h 26m2 stops
$625KLM
Find Deal
lun., oct. 13 - mar., oct. 21
Iberia Logo
5:30 pm - 11:45 amDEN-OPO
35h 15m2 stops
Iberia Logo
8:40 pm - 3:30 pmOPO-DEN
25h 50m2 stops
$653Iberia
Find Deal
sáb., dic. 6 - sáb., dic. 13

American Airlines flights from Colorado to Porto

Our best American Airlines deals on Colorado to Porto flight tickets
American Airlines
Oct 30
DEN7:26 amDenver Intl
18h 14m
2 stops
OPO7:40 amPorto
Nov 8
OPO8:20 amPorto
21h 02m
2 stops
DEN10:22 pmDenver Intl
$679
Find similar
American Airlines
Oct 24
DEN5:04 pmDenver Intl
15h 51m
2 stops
OPO3:55 pmPorto
Nov 1
OPO8:20 amPorto
18h 07m
2 stops
DEN8:27 pmDenver Intl
$704
Find similar

Turkish Airlines flights from Colorado to Porto

Our best Turkish Airlines deals on Colorado to Porto flight tickets
Turkish Airlines
Sep 23
DEN7:50 pmDenver Intl
31h 15m
1 stop
OPO10:05 amPorto
Oct 8
OPO10:50 amPorto
38h 05m
1 stop
DEN5:55 pmDenver Intl
$700
Find similar
Turkish Airlines
Sep 23
DEN7:50 pmDenver Intl
31h 15m
1 stop
OPO10:05 amPorto
Oct 8
OPO10:50 amPorto
38h 05m
1 stop
DEN5:55 pmDenver Intl
$701
Find similar
Turkish Airlines
Sep 25
DEN7:50 pmDenver Intl
37h 00m
1 stop
OPO3:50 pmPorto
Oct 2
OPO4:50 pmPorto
32h 05m
1 stop
DEN5:55 pmDenver Intl
$730
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Colorado 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 septiembre 18, 2025.
Use the filters below to find and compare flights from Colorado to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverPorto

DEN - OPO

DENOPO

Denver Intl

mar. 11/4

1:45 pm-9:30 am

1 stop12h 45m

Porto

mié. 11/12

6:00 am-4:00 pm

1 stop17h 00m

$550

DenverPorto

DEN - OPO

DENOPO

Denver Intl

mar. 11/4

7:45 am-9:30 am

2 stops18h 45m

Porto

mié. 11/12

6:00 am-4:00 pm

1 stop17h 00m

$555

DenverPorto

DEN - OPO

DENOPO

Denver Intl

mar. 11/4

7:46 am-9:30 am

2 stops18h 44m

Porto

mié. 11/12

12:35 pm-11:36 pm

2 stops18h 01m

$568

DenverPorto

DEN - OPO

DENOPO

Denver Intl

sáb. 12/6

3:40 pm-9:15 pm

3 stops22h 35m

Porto

sáb. 12/13

6:05 am-6:05 pm

2 stops19h 00m

$593

DenverPorto

DEN - OPO

DENOPO

Denver Intl

vie. 11/7

4:20 pm-11:40 pm

1 stop24h 20m

Porto

mar. 11/18

6:00 am-4:00 pm

1 stop17h 00m

$598

DenverPorto

DEN - OPO

DENOPO

Denver Intl

vie. 11/7

4:20 pm-9:15 pm

2 stops21h 55m

Porto

mar. 11/18

8:25 am-7:55 pm

2 stops18h 30m

$603

DenverPorto

DEN - OPO

DENOPO

Denver Intl

vie. 11/7

11:59 pm-9:30 am

2 stops26h 31m

Porto

mar. 11/18

6:00 am-4:00 pm

1 stop17h 00m

$605

DenverPorto

DEN - OPO

DENOPO

Denver Intl

lun. 10/13

5:59 pm-10:50 pm

1 stop21h 51m

Porto

mar. 10/21

6:00 am-10:00 pm

2 stops23h 00m

$619

DenverPorto

DEN - OPO

DENOPO

Denver Intl

lun. 10/13

4:16 pm-3:35 pm

2 stops16h 19m

Porto

mar. 10/21

6:15 am-9:41 pm

2 stops22h 26m

$625

DenverPorto

DEN - OPO

DENOPO

Denver Intl

sáb. 12/6

5:30 pm-11:45 am

2 stops35h 15m

Porto

sáb. 12/13

8:40 pm-3:30 pm

2 stops25h 50m

$653

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 Colorado 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 Colorado, with most prices found around $729. If you aren’t able to travel during the month of January, then book flights to Porto from Colorado 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 Colorado 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 Colorado 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 Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $970 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Colorado for as low as $823 on momondo.

Can stopping save me money on Colorado to Porto flights?

You could potentially save up to 4% on your flight if you consider stops on a Colorado to Porto flight.

Cheap Colorado to Porto flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to Porto

Direct flights

None
There are no direct flights from Colorado to Porto. There are no popular flight routes from Colorado to Porto.
Search flight deals

  • When did momondo last update prices for flights from Colorado to Porto Airport?

    Prices for flights from Colorado to Porto Airport refresh daily.

  • How many operators does momondo search for flights from Colorado to Porto Airport?

  • How old do you have to be to fly from Colorado to Porto Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Colorado to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents you'll need for your trip to Porto Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Porto Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Colorado to Porto

Compare and see reviews for airlines that fly from Colorado to Porto with momondo
Airline
Rating
Free Cancellation
Price
Turkish AirlinesPriceFrom $574Free CancellationRating
7.3
3,969 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $663Free CancellationRating
6.8
7,415 reviews
Search Lufthansa flights
United AirlinesPriceFrom $750Free CancellationRating
7.4
8,926 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
Aveiro
Coimbra
Braga
Matosinhos
Caminha
Guimarães
Esposende
Lamego
Chaves
Espinho
Arcos de Valdevez
Viseu
Ponte de Lima
Pinhao
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
Mira

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to Porto?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Porto from Colorado.

Can I find flights from Colorado to Porto with flexible booking policies on momondo?

All flight searches from Colorado to Porto on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Colorado to Porto?

Once all potential Colorado to Porto flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Colorado to Porto right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Colorado to Porto flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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