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

TAP AIR PORTUGAL and United Airlines are the most popular carriers operating from Colorado to Porto

What airlines fly to Porto?

United Airlines, Lufthansa and Air Canada 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 64% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 5 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

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 September 2026, there are 5 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.

$321 Cheap Flights from Colorado to Porto in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Colorado to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:03 am - 11:45 amDEN Denver Intl-OPO Porto

19h 42m2 stops Dallas/Fort Worth Madrid Barajas

12:25 pm - 8:09 amOPO Porto-DEN Denver Intl

26h 44m2 stops Madrid Barajas Dallas/Fort Worth

$563Iberia

Tue, Dec 1 - Wed, Dec 9

7:40 am - 9:30 amDEN Denver Intl-OPO Porto

18h 50m2 stops Washington, D.C. Dulles Intl Newark

12:35 pm - 12:19 amOPO Porto-DEN Denver Intl

18h 44m2 stops Newark Washington, D.C. Dulles Intl

$567United Airlines

Sun, Nov 8 - Tue, Nov 24

11:59 pm - 9:30 amDEN Denver Intl-OPO Porto

26h 31m1 stop Newark

12:35 pm - 9:36 pmOPO Porto-DEN Denver Intl

16h 01m1 stop Newark

$567United Airlines

Sun, Nov 8 - Tue, Nov 24

10:39 am - 11:55 amDEN Denver Intl-OPO Porto

18h 16m2 stops Dallas/Fort Worth London Heathrow

8:40 pm - 2:18 pmOPO Porto-DEN Denver Intl

24h 38m2 stops Madrid Barajas Dallas/Fort Worth

$571British Airways

Mon, Oct 19 - Wed, Nov 4

6:35 am - 8:15 amDEN Denver Intl-OPO Porto

18h 40m1 stop New York John F Kennedy Intl

5:00 am - 5:37 pmOPO Porto-DEN Denver Intl

19h 37m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$590Delta

Wed, Nov 4 - Wed, Nov 11

4:15 pm - 12:50 pmDEN Denver Intl-OPO Porto

13h 35m1 stop Munich Franz Josef Strauss

1:45 pm - 2:30 pmOPO Porto-DEN Denver Intl

31h 45m1 stop Munich Franz Josef Strauss

$600Lufthansa

Mon, Nov 16 - Wed, Dec 2

4:15 pm - 12:50 pmDEN Denver Intl-OPO Porto

13h 35m1 stop Munich Franz Josef Strauss

1:45 pm - 2:30 pmOPO Porto-DEN Denver Intl

31h 45m1 stop Munich Franz Josef Strauss

$600Lufthansa

Tue, Nov 17 - Wed, Dec 2

11:20 am - 11:15 amDEN Denver Intl-OPO Porto

40h 55m2 stops Montreal Pierre Elliott Trudeau Intl Zurich

6:00 am - 9:56 pmOPO Porto-DEN Denver Intl

21h 56m2 stops Frankfurt am Main Calgary

$603Air Canada

Tue, Mar 9 - Tue, Mar 16

5:40 pm - 11:15 amDEN Denver Intl-OPO Porto

58h 35m2 stops Toronto Pearson Intl Zurich

6:00 am - 9:56 pmOPO Porto-DEN Denver Intl

21h 56m2 stops Frankfurt am Main Calgary

$608Air Canada

Mon, Mar 8 - Tue, Mar 16

12:00 pm - 10:35 amDEN Denver Intl-OPO Porto

15h 35m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 11:28 pmOPO Porto-DEN Denver Intl

24h 28m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$613Delta

Wed, Mar 10 - Fri, Mar 19

Cheap last minute flights

Enter your travel dates to find the best prices.

4:15 pm - 11:25 pmDEN Denver Intl-OPO Porto

24h 10m1 stop Munich Franz Josef Strauss

6:00 am - 3:40 pmOPO Porto-DEN Denver Intl

16h 40m1 stop Frankfurt am Main

$1,023Lufthansa

Thu, Sep 24 - Thu, Oct 22

4:15 pm - 11:25 pmDEN Denver Intl-OPO Porto

24h 10m1 stop Munich Franz Josef Strauss

8:40 am - 7:45 pmOPO Porto-DEN Denver Intl

42h 05m2 stops Zurich Chicago O'Hare Intl

$1,026Multiple Airlines

Thu, Sep 24 - Thu, Oct 22

1:15 pm - 3:25 pmDEN Denver Intl-OPO Porto

19h 10m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 8:06 pmOPO Porto-DEN Denver Intl

22h 06m2 stops Amsterdam Schiphol Minneapolis St Paul

$1,040Delta

Thu, Sep 24 - Thu, Oct 22

3:25 pm - 3:25 pmDEN Denver Intl-OPO Porto

17h 00m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

5:00 am - 3:49 pmOPO Porto-DEN Denver Intl

17h 49m2 stops Amsterdam Schiphol Minneapolis St Paul

$1,040Delta

Thu, Sep 24 - Thu, Oct 22

4:15 pm - 11:25 pmDEN Denver Intl-OPO Porto

24h 10m1 stop Munich Franz Josef Strauss

11:50 am - 12:23 pmOPO Porto-DEN Denver Intl

31h 33m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

$1,043Multiple Airlines

Thu, Sep 24 - Thu, Oct 22

5:40 pm - 3:45 pmDEN Denver Intl-OPO Porto

15h 05m1 stop Frankfurt am Main

6:00 am - 3:40 pmOPO Porto-DEN Denver Intl

16h 40m1 stop Frankfurt am Main

$1,095Lufthansa

Thu, Sep 24 - Thu, Oct 22

5:40 pm - 3:45 pmDEN Denver Intl-OPO Porto

15h 05m1 stop Frankfurt am Main

8:40 am - 7:45 pmOPO Porto-DEN Denver Intl

42h 05m2 stops Zurich Chicago O'Hare Intl

$1,098Multiple Airlines

Thu, Sep 24 - Thu, Oct 22

11:52 pm - 9:45 amDEN Denver Intl-OPO Porto

26h 53m2 stops Washington, D.C. Dulles Intl Newark

11:50 am - 11:17 amOPO Porto-DEN Denver Intl

30h 27m3 stops Montreal Pierre Elliott Trudeau Intl Washington, D.C. Reagan-National Houston George Bush Intcntl

$1,128United Airlines

Thu, Sep 24 - Thu, Oct 22

5:40 pm - 3:45 pmDEN Denver Intl-OPO Porto

15h 05m1 stop Frankfurt am Main

6:00 am - 3:40 pmOPO Porto-DEN Denver Intl

16h 40m1 stop Frankfurt am Main

$1,146Lufthansa

Thu, Sep 24 - Thu, Oct 22

3:50 pm - 7:10 amDEN Denver Intl-OPO Porto

32h 20m2 stops Newark Montreal Pierre Elliott Trudeau Intl

6:00 am - 1:35 pmOPO Porto-DEN Denver Intl

14h 35m1 stop Frankfurt am Main

$1,161United Airlines

Thu, Sep 24 - Thu, Oct 22

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Iberia flights from Colorado to Porto

Our best Iberia deals on Colorado to Porto flight tickets

Iberia

Dec 1

DEN9:03 amDenver Intl

19h 42m

2 stops

OPO11:45 amPorto

Dec 9

OPO12:25 pmPorto

26h 44m

2 stops

DEN8:09 amDenver Intl

$563

Iberia

Nov 4

DEN5:01 pmDenver Intl

31h 39m

2 stops

OPO7:40 amPorto

Nov 11

OPO8:40 pmPorto

20h 07m

2 stops

DEN9:47 amDenver Intl

$579

Iberia

Nov 8

DEN8:07 amDenver Intl

20h 38m

2 stops

OPO11:45 amPorto

Nov 24

OPO8:20 amPorto

21h 44m

2 stops

DEN11:04 pmDenver Intl

$581

United Airlines flights from Colorado to Porto

Our best United Airlines deals on Colorado to Porto flight tickets

United Airlines

Nov 8

DEN11:59 pmDenver Intl

26h 31m

1 stop

OPO9:30 amPorto

Nov 24

OPO12:35 pmPorto

26h 44m

2 stops

DEN8:19 amDenver Intl

$567

United Airlines

Nov 8

DEN6:05 amDenver Intl

20h 25m

1 stop

OPO9:30 amPorto

Nov 24

OPO12:35 pmPorto

14h 25m

1 stop

DEN8:00 pmDenver Intl

$575

United Airlines

Mar 8

DEN7:45 amDenver Intl

18h 45m

1 stop

OPO9:30 amPorto

Mar 17

OPO12:35 pmPorto

14h 50m

1 stop

DEN9:25 pmDenver Intl

$580

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Tue 12/1

9:03 am-11:45 am

2 stops19h 42m

Porto

Wed 12/9

12:25 pm-8:09 am

2 stops26h 44m

$563

Quickest round-trip

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 11/8

7:40 am-9:30 am

2 stops18h 50m

Porto

Tue 11/24

12:35 pm-12:19 am

2 stops18h 44m

$567

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 11/8

11:59 pm-9:30 am

1 stop26h 31m

Porto

Tue 11/24

12:35 pm-9:36 pm

1 stop16h 01m

$567

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Mon 10/19

10:39 am-11:55 am

2 stops18h 16m

Porto

Wed 11/4

8:40 pm-2:18 pm

2 stops24h 38m

$571

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Wed 11/4

6:35 am-8:15 am

1 stop18h 40m

Porto

Wed 11/11

5:00 am-5:37 pm

2 stops19h 37m

$590

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Mon 11/16

4:15 pm-12:50 pm

1 stop13h 35m

Porto

Wed 12/2

1:45 pm-2:30 pm

1 stop31h 45m

$600

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Tue 11/17

4:15 pm-12:50 pm

1 stop13h 35m

Porto

Wed 12/2

1:45 pm-2:30 pm

1 stop31h 45m

$600

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Tue 3/9

11:20 am-11:15 am

2 stops40h 55m

Porto

Tue 3/16

6:00 am-9:56 pm

2 stops21h 56m

$603

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Mon 3/8

5:40 pm-11:15 am

2 stops58h 35m

Porto

Tue 3/16

6:00 am-9:56 pm

2 stops21h 56m

$608

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Wed 3/10

12:00 pm-10:35 am

2 stops15h 35m

Porto

Fri 3/19

5:00 am-11:28 pm

2 stops24h 28m

$613

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 November is, on average, the cheapest month to fly to Porto from Colorado, with most prices found around $688. If you aren’t able to travel during the month of November, then book flights to Porto from Colorado during February instead. Flights to Porto in February, while not as cheap as those in November, still average around $710.

How far in advance should I book a flight from Colorado 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 $961 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 $806 on momondo.

Can stopping save me money on Colorado to Porto flights?

You could potentially save up to 19% 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	$321
Fastest flight time	13h 00m
Direct flights	None

The best one-way flight to Porto from Colorado in the past 72 hours is $321. The best round-trip flight deal from Colorado to Porto found on momondo in the last 72 hours is $563.

The fastest flight from Colorado to Porto takes 13h 00m

There are no direct flights from Colorado to Porto. There are no popular flight routes from Colorado to Porto.

Search flight deals

Frequently asked questions about flying 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 September 2026, there are 5 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
Lufthansa	PriceFrom $485	Free Cancellation	Rating 6.8 8,238 reviews	Search Lufthansa flights
United Airlines	PriceFrom $592	Free Cancellation	Rating 7.4 10,226 reviews	Search United Airlines flights
Air Canada	PriceFrom $700	Free Cancellation	Rating 7.1 11,668 reviews	Search Air Canada flights
Turkish Airlines	PriceFrom $701	Free Cancellation	Rating 7.4 4,461 reviews	Search Turkish Airlines flights
Delta	PriceFrom $764	Free Cancellation	Rating 7.8 8,590 reviews	Search Delta flights

Coimbra

Vila Nova de Gaia

Braga

Aveiro

Pinhao

Matosinhos

Esposende

Chaves

Viseu

Arcos de Valdevez

Espinho

Guimarães

Lamego

Ponte de Lima

Penafiel

Caminha

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.

An easier way to manage your Porto trip

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Airports servicing Portugal

Faro Airport

Lisbon Humberto Delgado Airport

Azores Airport

Madeira Airport

Algarve Airport

Cheap flights from Colorado to Porto from $321

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 3/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Iberia flights from Colorado to Porto

Our best Iberia deals on Colorado to Porto flight tickets

United Airlines flights from Colorado to Porto

Our best United Airlines deals on Colorado to Porto flight tickets

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Use the filters below to find and compare flights from Colorado to Porto that are best for you.

See travel insights to Porto from

How to get the cheapest flight ticket from Colorado to Porto

What is the cheapest month to fly to Porto?

How far in advance should I book a flight from Colorado to Porto?

Can stopping save me money on Colorado to Porto flights?

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

What airlines fly to Porto?

Cheap Colorado to Porto flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Colorado to Porto

Best airlines flying from Colorado to Porto

Compare and see reviews for airlines that fly from Colorado to Porto with momondo

Traveling to a place near Porto?

Why use momondo?

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Airports servicing Portugal

Fly your favorite airline to Porto

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Porto

List of cabin classes available on flights landing in Porto. Availability may vary depending on flight origin and airline.

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