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

Lufthansa and Brussels Airlines are the most popular carriers operating from Colorado to Portugal

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 50m on average, while flying from Aspen to Lisbon is 14h 07m on average. Lisbon is the most popular airport in Portugal.

What airlines fly to Portugal?

United Airlines, British Airways and Air Canada 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 November 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.

$309 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.

1:30 pm - 3:05 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

18h 35m2 stops Toronto Pearson Intl Dublin

8:30 pm - 4:50 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

27h 20m2 stops Dublin Toronto Pearson Intl

$524Multiple Airlines

Sat, Dec 5 - Sat, Dec 12

1:30 pm - 3:05 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

18h 35m2 stops Toronto Pearson Intl Dublin

8:30 pm - 4:50 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

27h 20m2 stops Dublin Toronto Pearson Intl

$560Multiple Airlines

Sat, Jan 16 - Sat, Jan 23

3:40 pm - 12:45 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

14h 05m1 stop Reykjavik Keflavik Intl

11:40 am - 6:00 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

13h 20m1 stop Reykjavik Keflavik Intl

$567Icelandair

Mon, Dec 7 - Tue, Dec 22

3:40 pm - 12:45 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

14h 05m1 stop Reykjavik Keflavik Intl

11:40 am - 6:00 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

13h 20m1 stop Reykjavik Keflavik Intl

$568Icelandair

Mon, Dec 7 - Tue, Dec 22

4:00 pm - 11:25 pmDEN Denver Intl-OPO Porto

24h 25m1 stop Munich Franz Josef Strauss

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

16h 40m1 stop Frankfurt am Main

$693Lufthansa

Wed, Apr 14 - Thu, Apr 22

4:00 pm - 11:25 pmDEN Denver Intl-OPO Porto

24h 25m1 stop Munich Franz Josef Strauss

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

16h 40m1 stop Frankfurt am Main

$693Lufthansa

Sun, Apr 11 - Tue, Apr 20

10:01 am - 9:30 amDEN Denver Intl-OPO Porto

16h 29m1 stop Newark

6:00 am - 1:40 pmOPO Porto-DEN Denver Intl

14h 40m1 stop Frankfurt am Main

$711United Airlines

Tue, Mar 2 - Fri, Mar 5

6:00 am - 9:30 amDEN Denver Intl-OPO Porto

21h 30m1 stop Newark

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

14h 35m1 stop Frankfurt am Main

$712United Airlines

Wed, Mar 17 - Wed, Apr 21

6:30 am - 10:30 amDEN Denver Intl-OPO Porto

21h 00m1 stop New York John F Kennedy Intl

5:00 am - 5:30 pmOPO Porto-DEN Denver Intl

19h 30m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$722Delta

Sun, Apr 11 - Wed, Apr 21

12:20 pm - 10:30 amDEN Denver Intl-OPO Porto

15h 10m1 stop New York John F Kennedy Intl

11:45 am - 10:59 pmOPO Porto-DEN Denver Intl

18h 14m2 stops Amsterdam Schiphol Minneapolis St Paul

$724Delta

Sun, Apr 11 - Thu, Apr 22

Cheap last minute flights

Enter your travel dates to find the best prices.

4:10 pm - 10:20 amDEN Denver Intl-LIS Lisbon Humberto Delgado

11h 10m1 stop Washington, D.C. Dulles Intl

10:15 am - 9:36 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

18h 21m1 stop Newark

$835United Airlines

Tue, Nov 10 - Tue, Nov 17

5:55 pm - 9:30 amDEN Denver Intl-OPO Porto

32h 35m2 stops Washington, D.C. Dulles Intl Newark

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

16h 01m1 stop Newark

$878United Airlines

Sat, Nov 14 - Sun, Nov 22

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

26h 31m2 stops Washington, D.C. Dulles Intl Newark

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

16h 01m1 stop Newark

$878United Airlines

Sat, Nov 14 - Sun, Nov 22

11:59 pm - 8:10 amDEN Denver Intl-LIS Lisbon Humberto Delgado

25h 11m1 stop Newark

2:20 pm - 2:30 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

31h 10m1 stop Munich Franz Josef Strauss

$886Multiple Airlines

Sat, Nov 14 - Sat, Nov 21

8:45 pm - 9:20 amDEN Denver Intl-LIS Lisbon Humberto Delgado

29h 35m2 stops Dallas/Fort Worth Toronto Pearson Intl

7:25 pm - 8:27 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

32h 02m2 stops Brussels Bruxelles-National Montreal Pierre Elliott Trudeau Intl

$887Multiple Airlines

Sat, Nov 14 - Sat, Nov 21

8:25 pm - 9:20 amDEN Denver Intl-LIS Lisbon Humberto Delgado

29h 55m2 stops Chicago O'Hare Intl Toronto Pearson Intl

2:20 pm - 2:30 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

31h 10m1 stop Munich Franz Josef Strauss

$892Multiple Airlines

Sat, Nov 14 - Sat, Nov 21

4:15 pm - 11:55 pmDEN Denver Intl-OPO Porto

24h 40m1 stop Munich Franz Josef Strauss

6:15 am - 2:30 pmOPO Porto-DEN Denver Intl

15h 15m1 stop Munich Franz Josef Strauss

$893Lufthansa

Sat, Nov 14 - Sun, Nov 22

3:40 pm - 3:55 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

17h 15m1 stop Reykjavik Keflavik Intl

1:45 pm - 6:00 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

35h 15m1 stop Reykjavik Keflavik Intl

$904Icelandair

Sat, Nov 14 - Thu, Nov 19

7:30 pm - 11:25 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

20h 55m1 stop Istanbul

11:35 am - 5:25 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

36h 50m1 stop Istanbul

$1,134Turkish Airlines

Wed, Nov 11 - Sat, Nov 14

8:30 pm - 8:00 amDEN Denver Intl-FNC Funchal Madeira

28h 30m2 stops Munich Franz Josef Strauss Porto

3:10 pm - 3:35 pmFNC Funchal Madeira-DEN Denver Intl

31h 25m1 stop Frankfurt am Main

$2,478Lufthansa

Wed, Nov 11 - Wed, Nov 18

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Icelandair flights from Colorado to Portugal

Our best Icelandair deals on Colorado to Portugal flight tickets

Icelandair

Dec 7

DEN3:40 pmDenver Intl

14h 05m

1 stop

LIS12:45 pmLisbon Humberto Delgado

Dec 22

LIS11:40 amLisbon Humberto Delgado

13h 20m

1 stop

DEN6:00 pmDenver Intl

$567

Icelandair

Dec 7

DEN3:40 pmDenver Intl

14h 05m

1 stop

LIS12:45 pmLisbon Humberto Delgado

Dec 22

LIS11:40 amLisbon Humberto Delgado

13h 20m

1 stop

DEN6:00 pmDenver Intl

$568

Icelandair

Nov 25

DEN3:40 pmDenver Intl

14h 10m

1 stop

LIS12:50 pmLisbon Humberto Delgado

Dec 1

LIS1:55 pmLisbon Humberto Delgado

35h 05m

1 stop

DEN6:00 pmDenver Intl

$719

Turkish Airlines flights from Colorado to Portugal

Our best Turkish Airlines deals on Colorado to Portugal flight tickets

Turkish Airlines

Nov 11

DEN7:30 pmDenver Intl

20h 55m

1 stop

LIS11:25 pmLisbon Humberto Delgado

Nov 14

LIS11:35 amLisbon Humberto Delgado

36h 50m

1 stop

DEN5:25 pmDenver Intl

$1,134

Turkish Airlines

Nov 22

DEN3:01 pmDenver Intl

25h 24m

2 stops

LIS11:25 pmLisbon Humberto Delgado

Nov 27

LIS5:55 amLisbon Humberto Delgado

18h 30m

1 stop

DEN5:25 pmDenver Intl

$1,190

Turkish Airlines

Nov 29

DEN7:30 pmDenver Intl

31h 50m

2 stops

FAO10:20 amFaro

Dec 5

FAO11:10 amFaro

37h 15m

2 stops

DEN5:25 pmDenver Intl

$1,424

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Sat 12/5

1:30 pm-3:05 pm

2 stops18h 35m

Lisbon Humberto Delgado

Sat 12/12

8:30 pm-4:50 pm

2 stops27h 20m

$524

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Sat 1/16

1:30 pm-3:05 pm

2 stops18h 35m

Lisbon Humberto Delgado

Sat 1/23

8:30 pm-4:50 pm

2 stops27h 20m

$560

Quickest round-trip

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Mon 12/7

3:40 pm-12:45 pm

1 stop14h 05m

Lisbon Humberto Delgado

Tue 12/22

11:40 am-6:00 pm

1 stop13h 20m

$567

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Mon 12/7

3:40 pm-12:45 pm

1 stop14h 05m

Lisbon Humberto Delgado

Tue 12/22

11:40 am-6:00 pm

1 stop13h 20m

$568

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Wed 4/14

4:00 pm-11:25 pm

1 stop24h 25m

Porto

Thu 4/22

6:00 am-3:40 pm

1 stop16h 40m

$693

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 4/11

4:00 pm-11:25 pm

1 stop24h 25m

Porto

Tue 4/20

6:00 am-3:40 pm

1 stop16h 40m

$693

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Tue 3/2

10:01 am-9:30 am

1 stop16h 29m

Porto

Fri 3/5

6:00 am-1:40 pm

1 stop14h 40m

$711

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Wed 3/17

6:00 am-9:30 am

1 stop21h 30m

Porto

Wed 4/21

6:00 am-1:35 pm

1 stop14h 35m

$712

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 4/11

6:30 am-10:30 am

1 stop21h 00m

Porto

Wed 4/21

5:00 am-5:30 pm

2 stops19h 30m

$722

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 4/11

12:20 pm-10:30 am

1 stop15h 10m

Porto

Thu 4/22

11:45 am-10:59 pm

2 stops18h 14m

$724

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 January instead. Flights to Portugal in January, while not as cheap as those in February, still average around $724.

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 $955 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 $865 on momondo.

Can stopping save me money on Colorado to Portugal flights?

You could potentially save up to 19% 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	$309
Fastest flight time	12h 50m
Direct flights	None

The best one-way flight to Portugal from Colorado in the past 72 hours is $309. The best round-trip flight deal from Colorado to Portugal found on momondo in the last 72 hours is $524.

The fastest flight from Colorado to Portugal takes 12h 50m

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 November 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 6.9 767 reviews	Search Icelandair flights
Lufthansa	PriceFrom $485	Free Cancellation	Rating 6.8 8,292 reviews	Search Lufthansa flights
United Airlines	PriceFrom $489	Free Cancellation	Rating 7.3 10,472 reviews	Search United Airlines flights
KLM	PriceFrom $551	Free Cancellation	Rating 7.8 1,595 reviews	Search KLM flights
Virgin Atlantic	PriceFrom $575	Free Cancellation	Rating 7.5 698 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom $598	Free Cancellation	Rating 6.7 8,286 reviews	Search British Airways flights
American Airlines	PriceFrom $630	Free Cancellation	Rating 7.0 12,226 reviews	Search American Airlines flights
Turkish Airlines	PriceFrom $651	Free Cancellation	Rating 7.4 4,467 reviews	Search Turkish Airlines flights
Delta	PriceFrom $686	Free Cancellation	Rating 7.8 8,699 reviews	Search Delta flights
Air Canada	PriceFrom $700	Free Cancellation	Rating 7.1 11,874 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 $358

Flights to Portofrom $399

Flights to Funchalfrom $594

Flights to Farofrom $577

Flights to Ponta Delgadafrom $401

Flights to Lajesfrom $312

Flights to Hortafrom $585

Flights to Pico Islandfrom $585

Flights to Porto Santofrom $931

Flights to Velasfrom $588

Cheap flights from Colorado to Portugal from $309

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 1/18. 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

Trusted and free

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Price Alerts

Icelandair flights from Colorado to Portugal

Our best Icelandair deals on Colorado to Portugal flight tickets

Turkish Airlines flights from Colorado to Portugal

Our best Turkish Airlines 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