What airlines fly to Porto?

United Airlines, Lufthansa and Turkish Airlines are the top three most popular airlines that fly to Porto from Colorado according to our data. United Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 4 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Colorado to Porto?

United Airlines, British Airways, and Lufthansa are the most popular carriers operating from Colorado to Porto

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?

As of August 2025, there are 4 operators available to choose from 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.

$305 Cheap Flights from Colorado to Porto in 2025

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Find the cheapest flights from Colorado to Porto

Round-trip

One-way

Cheap round-trip flights

4:40 pm - 8:00 amDEN-OPO

32h 20m3 stops

10:25 pm - 6:55 pmOPO-DEN

27h 30m2 stops

$590

Find Deal

Thu, Oct 16 - Tue, Oct 21

4:40 pm - 8:00 amDEN-OPO

32h 20m3 stops

10:00 pm - 6:55 pmOPO-DEN

27h 55m3 stops

$597

Find Deal

Thu, Oct 16 - Tue, Oct 21

4:40 pm - 3:20 pmDEN-OPO

15h 40m2 stops

10:25 pm - 6:55 pmOPO-DEN

27h 30m2 stops

$617

Find Deal

Thu, Oct 16 - Tue, Oct 21

4:20 pm - 12:50 pmDEN-OPO

13h 30m1 stop

6:00 am - 4:00 pmOPO-DEN

17h 00m1 stop

$645Lufthansa

Find Deal

Tue, Dec 2 - Sun, Dec 14

9:53 am - 2:45 pmDEN-OPO

21h 52m2 stops

6:00 am - 8:53 amOPO-DEN

33h 53m2 stops

$656Air Canada

Find Deal

Tue, Dec 2 - Sun, Dec 14

7:05 pm - 11:40 amDEN-OPO

33h 35m2 stops

6:15 am - 12:37 pmOPO-DEN

37h 22m2 stops

$664Air Canada

Find Deal

Sun, Feb 1 - Sun, Feb 22

9:35 am - 9:30 amDEN-OPO

16h 55m2 stops

6:00 am - 1:40 pmOPO-DEN

14h 40m1 stop

$684United Airlines

Find Deal

Fri, Nov 28 - Sun, Dec 7

5:59 pm - 10:50 pmDEN-OPO

21h 51m1 stop

6:00 am - 4:03 pmOPO-DEN

17h 03m2 stops

$690Lufthansa

Find Deal

Mon, Oct 13 - Tue, Oct 21

4:10 pm - 9:30 amDEN-OPO

11h 20m1 stop

12:35 pm - 9:23 pmOPO-DEN

15h 48m1 stop

$692United Airlines

Find Deal

Thu, Oct 30 - Sat, Nov 8

10:40 am - 7:40 amDEN-OPO

15h 00m2 stops

8:40 pm - 9:31 amOPO-DEN

19h 51m2 stops

$707American Airlines

Find Deal

Thu, Oct 30 - Sat, Nov 8

Lufthansa flights from Colorado to Porto

Our best Lufthansa deals on Colorado to Porto flight tickets

Lufthansa

Dec 2

DEN4:20 pmDenver Intl

13h 30m

1 stop

OPO12:50 pmPorto

Dec 14

OPO6:00 amPorto

17h 00m

1 stop

DEN4:00 pmDenver Intl

$645

Find similar

Lufthansa

Oct 13

DEN5:59 pmDenver Intl

21h 51m

1 stop

OPO10:50 pmPorto

Oct 21

OPO6:00 amPorto

17h 03m

2 stops

DEN4:03 pmDenver Intl

$690

Find similar

Lufthansa

Oct 13

DEN5:59 pmDenver Intl

21h 51m

1 stop

OPO10:50 pmPorto

Oct 21

OPO6:00 amPorto

17h 03m

2 stops

DEN4:03 pmDenver Intl

$691

Find similar

Air Canada flights from Colorado to Porto

Our best Air Canada deals on Colorado to Porto flight tickets

Air Canada

Dec 2

DEN9:53 amDenver Intl

21h 52m

2 stops

OPO2:45 pmPorto

Dec 14

OPO6:00 amPorto

33h 53m

2 stops

DEN8:53 amDenver Intl

$656

Find similar

Air Canada

Feb 1

DEN7:05 pmDenver Intl

33h 35m

2 stops

OPO11:40 amPorto

Feb 22

OPO6:15 amPorto

37h 22m

2 stops

DEN12:37 pmDenver Intl

$664

Find similar

Air Canada

Sep 23

DEN7:49 pmDenver Intl

30h 31m

2 stops

OPO9:20 amPorto

Oct 8

OPO6:00 amPorto

33h 42m

2 stops

DEN8:42 amDenver Intl

$734

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 10/16

4:40 pm-8:00 am

3 stops32h 20m

Porto

Tue 10/21

10:25 pm-6:55 pm

2 stops27h 30m

$590

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 10/16

4:40 pm-8:00 am

3 stops32h 20m

Porto

Tue 10/21

10:00 pm-6:55 pm

3 stops27h 55m

$597

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 10/16

4:40 pm-3:20 pm

2 stops15h 40m

Porto

Tue 10/21

10:25 pm-6:55 pm

2 stops27h 30m

$617

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 12/2

4:20 pm-12:50 pm

1 stop13h 30m

Porto

Sun 12/14

6:00 am-4:00 pm

1 stop17h 00m

$645

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 12/2

9:53 am-2:45 pm

2 stops21h 52m

Porto

Sun 12/14

6:00 am-8:53 am

2 stops33h 53m

$656

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 2/1

7:05 pm-11:40 am

2 stops33h 35m

Porto

Sun 2/22

6:15 am-12:37 pm

2 stops37h 22m

$664

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Fri 11/28

9:35 am-9:30 am

2 stops16h 55m

Porto

Sun 12/7

6:00 am-1:40 pm

1 stop14h 40m

$684

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 10/13

5:59 pm-10:50 pm

1 stop21h 51m

Porto

Tue 10/21

6:00 am-4:03 pm

2 stops17h 03m

$690

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 10/30

4:10 pm-9:30 am

1 stop11h 20m

Porto

Sat 11/8

12:35 pm-9:23 pm

1 stop15h 48m

$692

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 10/30

10:40 am-7:40 am

2 stops15h 00m

Porto

Sat 11/8

8:40 pm-9:31 am

2 stops19h 51m

$707

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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 $718. 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 $972 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 $855 on momondo.

Can stopping save me money on Colorado to Porto flights?

You could potentially save up to 1% 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

Best Price Found	$305
Fastest flight time	11h 20m
Direct flights	None
Airports in Porto	1 airport

The best one-way flight to Porto from Colorado in the past 72 hours is $305. The best round-trip flight deal from Colorado to Porto found on momondo in the last 72 hours is $590.

The fastest flight from Colorado to Porto takes 11h 20m

There are no direct flights from Colorado to Porto. Popular non-direct route for this connection is Denver Intl Airport - Porto Airport.

There is 1 airport near Porto: Porto (OPO)

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?
As of August 2025, there are 4 operators available to choose from 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
United Airlines	PriceFrom $490	Free Cancellation	Rating 7.4 8,916 reviews	Search United Airlines flights
Delta	PriceFrom $535	Free Cancellation	Rating 8.0 7,985 reviews	Search Delta flights
Turkish Airlines	PriceFrom $574	Free Cancellation	Rating 7.3 3,934 reviews	Search Turkish Airlines flights
Lufthansa	PriceFrom $641	Free Cancellation	Rating 6.8 7,287 reviews	Search Lufthansa flights

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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.