How long is the flight from Colorado to Portugal?

Average flight duration from Colorado to Portugal depends on which airport you fly into and out of. Flying from Denver to Lisbon is 12h 05m on average, while flying from Aspen to Lisbon is 16h 55m on average. Lisbon is the most popular airport in Portugal.

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

United Airlines, Lufthansa, and Icelandair are the most popular carriers operating from Colorado to Portugal

What airlines fly to Portugal?

United Airlines, British Airways and Lufthansa are the top three most popular airlines that fly to Portugal from Colorado according to our data. United Airlines is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 10 different airlines that fly to Portugal 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 Portugal?

Prices for flights from Colorado to Portugal are refreshed on a daily basis.

How many operators does momondo search for flights from Colorado to Portugal?

As of September 2026, there are 10 operators available to choose from for flights from Colorado to Portugal.

How old do you have to be to fly from Colorado to Portugal?

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 Colorado to Portugal.

What documentation or ID do you need to fly to Portugal?

The required travel and health documents for your Portugal 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 Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$263 Cheap Flights from Colorado to Portugal in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Colorado to Portugal

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:40 pm - 12:50 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

14h 10m1 stop Reykjavik Keflavik Intl

2:00 pm - 6:00 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

35h 00m1 stop Reykjavik Keflavik Intl

$519Icelandair

Sat, Oct 31 - Sun, Nov 15

4:40 pm - 12:50 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

14h 10m1 stop Reykjavik Keflavik Intl

2:00 pm - 6:00 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

35h 00m1 stop Reykjavik Keflavik Intl

$520Icelandair

Sat, Oct 31 - Sun, Nov 15

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

11:25 am - 10:40 amDEN Denver Intl-LIS Lisbon Humberto Delgado

16h 15m1 stop Montreal Pierre Elliott Trudeau Intl

12:50 pm - 2:50 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

33h 00m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$574Air Canada

Mon, Nov 9 - Tue, Nov 17

1:30 pm - 8:55 amDEN Denver Intl-LIS Lisbon Humberto Delgado

12h 25m1 stop Toronto Pearson Intl

12:50 pm - 2:50 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

33h 00m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$579Air Canada

Wed, Nov 4 - Tue, Nov 17

11:20 am - 6:55 amDEN Denver Intl-LIS Lisbon Humberto Delgado

13h 35m1 stop Montreal Pierre Elliott Trudeau Intl

8:55 am - 8:26 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

17h 31m1 stop Montreal Pierre Elliott Trudeau Intl

$580Multiple Airlines

Wed, Mar 17 - Thu, Mar 25

7:57 am - 5:55 pmCOS Colorado Springs-LIS Lisbon Humberto Delgado

26h 58m2 stops Dallas/Fort Worth London Heathrow

6:35 pm - 9:37 amLIS Lisbon Humberto Delgado-COS Colorado Springs

45h 02m2 stops London Heathrow Dallas/Fort Worth

$838British Airways

Mon, Oct 19 - Mon, Oct 26

Cheap last minute flights

Enter your travel dates to find the best prices.

6:40 pm - 11:05 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

21h 25m1 stop London Heathrow

7:20 am - 4:25 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

16h 05m1 stop London Heathrow

$747British Airways

Sun, Sep 27 - Fri, Oct 23

6:40 pm - 11:05 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

21h 25m1 stop London Heathrow

7:20 am - 4:25 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

16h 05m1 stop London Heathrow

$747British Airways

Sun, Sep 27 - Wed, Oct 7

6:35 am - 8:50 amDEN Denver Intl-LIS Lisbon Humberto Delgado

19h 15m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

5:35 am - 3:40 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

17h 05m1 stop Paris Charles de Gaulle

$776Delta

Sun, Sep 27 - Wed, Oct 7

6:35 am - 8:50 amDEN Denver Intl-LIS Lisbon Humberto Delgado

19h 15m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

9:50 am - 11:55 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

21h 05m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

$786Delta

Sun, Sep 27 - Wed, Oct 7

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

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

4:15 pm - 1:40 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

14h 25m1 stop Munich Franz Josef Strauss

5:05 am - 3:40 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

17h 35m1 stop Frankfurt am Main

$1,060Lufthansa

Thu, Sep 24 - Thu, Oct 1

12:30 pm - 10:30 amDEN Denver Intl-LIS Lisbon Humberto Delgado

15h 00m2 stops Newark Washington, D.C. Dulles Intl

5:05 am - 3:40 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

17h 35m1 stop Frankfurt am Main

$1,088United Airlines

Thu, Sep 24 - Thu, Oct 1

11:52 pm - 10:30 amDEN Denver Intl-LIS Lisbon Humberto Delgado

27h 38m1 stop Washington, D.C. Dulles Intl

5:05 am - 3:40 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

17h 35m1 stop Frankfurt am Main

$1,097United Airlines

Sat, Sep 26 - Sat, Oct 10

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Icelandair flights from Colorado to Portugal

Our best Icelandair deals on Colorado to Portugal flight tickets

Icelandair

Oct 31

DEN4:40 pmDenver Intl

14h 10m

1 stop

LIS12:50 pmLisbon Humberto Delgado

Nov 15

LIS2:00 pmLisbon Humberto Delgado

35h 00m

1 stop

DEN6:00 pmDenver Intl

$519

Icelandair

Oct 31

DEN4:40 pmDenver Intl

14h 10m

1 stop

LIS12:50 pmLisbon Humberto Delgado

Nov 15

LIS2:00 pmLisbon Humberto Delgado

35h 00m

1 stop

DEN6:00 pmDenver Intl

$520

Icelandair

Nov 9

DEN3:40 pmDenver Intl

14h 10m

1 stop

LIS12:50 pmLisbon Humberto Delgado

Nov 17

LIS2:00 pmLisbon Humberto Delgado

35h 00m

1 stop

DEN6:00 pmDenver Intl

$527

Air Canada flights from Colorado to Portugal

Our best Air Canada deals on Colorado to Portugal flight tickets

Air Canada

Nov 9

DEN11:25 amDenver Intl

16h 15m

1 stop

LIS10:40 amLisbon Humberto Delgado

Nov 17

LIS12:50 pmLisbon Humberto Delgado

33h 00m

2 stops

DEN2:50 pmDenver Intl

$574

Air Canada

Nov 9

DEN8:15 amDenver Intl

19h 25m

2 stops

LIS10:40 amLisbon Humberto Delgado

Nov 17

LIS12:50 pmLisbon Humberto Delgado

26h 47m

2 stops

DEN8:37 amDenver Intl

$587

Air Canada

Nov 3

DEN1:30 pmDenver Intl

34h 25m

2 stops

LIS6:55 amLisbon Humberto Delgado

Nov 24

LIS12:50 pmLisbon Humberto Delgado

14h 37m

1 stop

DEN8:27 pmDenver Intl

$596

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Sat 10/31

4:40 pm-12:50 pm

1 stop14h 10m

Lisbon Humberto Delgado

Sun 11/15

2:00 pm-6:00 pm

1 stop35h 00m

$519

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Sat 10/31

4:40 pm-12:50 pm

1 stop14h 10m

Lisbon Humberto Delgado

Sun 11/15

2:00 pm-6:00 pm

1 stop35h 00m

$520

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

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

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Mon 11/9

11:25 am-10:40 am

1 stop16h 15m

Lisbon Humberto Delgado

Tue 11/17

12:50 pm-2:50 pm

2 stops33h 00m

$574

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Wed 11/4

1:30 pm-8:55 am

1 stop12h 25m

Lisbon Humberto Delgado

Tue 11/17

12:50 pm-2:50 pm

2 stops33h 00m

$579

Quickest round-trip

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Wed 3/17

11:20 am-6:55 am

1 stop13h 35m

Lisbon Humberto Delgado

Thu 3/25

8:55 am-8:26 pm

1 stop17h 31m

$580

Colorado SpringsLisbon

COS Colorado Springs - LIS Lisbon Humberto Delgado

COSLIS

Colorado Springs

Mon 10/19

7:57 am-5:55 pm

2 stops26h 58m

Lisbon Humberto Delgado

Mon 10/26

6:35 pm-9:37 am

2 stops45h 02m

$838

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 Portugal

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

Other information

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Colorado is in February. Flight prices, which tend to average around $638, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Portugal from Colorado during November instead. Flights to Portugal in November, while not as cheap as those in February, still average around $776.

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

You are more likely to see cheaper flights to Portugal from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $937 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Colorado for as low as $873 on momondo.

Can stopping save me money on Colorado to Portugal flights?

You could potentially save up to 18% on your flight if you consider stops on a Colorado to Portugal flight.

Cheap Colorado to Portugal flight deals and tips

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

Best Price Found	$263
Fastest flight time	11h 20m
Direct flights	None

The best one-way flight to Portugal from Colorado in the past 72 hours is $263. The best round-trip flight deal from Colorado to Portugal found on momondo in the last 72 hours is $519.

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

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

Search flight deals

Frequently asked questions about flying from Colorado to Portugal

When did momondo last update prices for flights from Colorado to Portugal?
Prices for flights from Colorado to Portugal are refreshed on a daily basis.
How many operators does momondo search for flights from Colorado to Portugal?
As of September 2026, there are 10 operators available to choose from for flights from Colorado to Portugal.
How old do you have to be to fly from Colorado to Portugal?
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 Colorado to Portugal.
What documentation or ID do you need to fly to Portugal?
The required travel and health documents for your Portugal 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 Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Colorado to Portugal

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

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $464	Free Cancellation	Rating 6.9 749 reviews	Search Icelandair flights
Lufthansa	PriceFrom $485	Free Cancellation	Rating 6.8 8,238 reviews	Search Lufthansa flights
United Airlines	PriceFrom $489	Free Cancellation	Rating 7.4 10,228 reviews	Search United Airlines flights
KLM	PriceFrom $551	Free Cancellation	Rating 7.8 1,575 reviews	Search KLM flights
Virgin Atlantic	PriceFrom $575	Free Cancellation	Rating 7.4 694 reviews	Search Virgin Atlantic flights
American Airlines	PriceFrom $575	Free Cancellation	Rating 7.0 12,075 reviews	Search American Airlines flights
Delta	PriceFrom $620	Free Cancellation	Rating 7.8 8,591 reviews	Search Delta flights
British Airways	PriceFrom $632	Free Cancellation	Rating 6.7 8,228 reviews	Search British Airways flights
Turkish Airlines	PriceFrom $635	Free Cancellation	Rating 7.4 4,461 reviews	Search Turkish Airlines flights
Air Canada	PriceFrom $700	Free Cancellation	Rating 7.1 11,668 reviews	Search Air Canada flights

Why use momondo?

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

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 Portugal from Colorado.

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

Flights from Colorado to Portugal with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between Colorado and Portugal by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Portugal, momondo offers a useful price alert feature which will track prices for flights to Portugal from Colorado and alert you when they change.

An easier way to manage your Portugal 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.

Start using Trips

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Find better results for your trip to Portugal

Popular cities

Other flights from Colorado

Other flights to Portugal

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Portugal

Flights to Lisbonfrom $454

Flights to Portofrom $470

Flights to Funchalfrom $485

Flights to Farofrom $463

Flights to Ponta Delgadafrom $438

Flights to Lajesfrom $566

Flights to Hortafrom $591

Flights to Pico Islandfrom $592

Flights to Porto Santofrom $878

Flights to Velasfrom $590

Cheap flights from Colorado to Portugal from $263

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 Portugal departing on 10/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Colorado to Portugal

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

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Icelandair flights from Colorado to Portugal

Our best Icelandair deals on Colorado to Portugal flight tickets

Air Canada flights from Colorado to Portugal

Our best Air Canada deals on Colorado to Portugal flight tickets

momondo Fare Finder

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

See travel insights to Portugal from

How to get the cheapest flight ticket from Colorado to Portugal

What is the cheapest month to fly to Portugal?

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

Can stopping save me money on Colorado to Portugal flights?

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

What airlines fly to Portugal?

How long is the flight from Colorado to Portugal?

Cheap Colorado to Portugal flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Colorado to Portugal

Best airlines flying from Colorado to Portugal

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

Why use momondo?

An easier way to manage your Portugal 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

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

Colorado flight routes

According to popular flight searches on momondo this year

Portugal flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Portugal

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

Cabin classes currently available on flights to Portugal

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

Complete your trip to Portugal

Explore popular destinations other users love

According to popular flight searches on momondo this year