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

British Airways, KLM, and United 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 18h 20m on average, while flying from Colorado Springs to Lisbon is 19h 40m on average. Lisbon is the most popular airport in Portugal.

What airlines fly to Portugal?

United Airlines, Lufthansa and British Airways 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 65% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 13 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 April 2026, there are 13 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.

$368 Cheap Flights from Colorado to Portugal in 2026

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Find the cheapest flights from Colorado to Portugal

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:25 pm - 11:30 pm

DEN

OPO

20h 05m

1 stop

6:10 am - 6:25 pm

OPO

DEN

19h 15m

1 stop

$675Turkish Airlines

Thu, Sep 24 - Thu, Oct 22

8:25 pm - 10:00 am

DEN

OPO

30h 35m

1 stop

10:45 am - 6:25 pm

OPO

DEN

38h 40m

1 stop

$685Turkish Airlines

Tue, Aug 18 - Wed, Aug 26

5:14 pm - 12:55 pm

DEN

FNC

36h 41m

2 stops

1:20 pm - 12:06 am

FNC

DEN

41h 46m

2 stops

$864Iberia

Mon, May 4 - Mon, May 11

8:00 am - 3:50 pm

COS

LIS

24h 50m

2 stops

4:35 pm - 10:57 pm

LIS

COS

37h 22m

2 stops

$876Multiple Airlines

Wed, Sep 23 - Mon, Oct 5

8:00 am - 11:25 pm

COS

LIS

32h 25m

2 stops

6:35 am - 10:57 pm

LIS

COS

23h 22m

2 stops

$950Multiple Airlines

Thu, Sep 24 - Wed, Sep 30

6:30 pm - 7:05 pm

DEN

FAO

17h 35m

1 stop

11:10 am - 4:20 pm

FAO

DEN

36h 10m

1 stop

$955British Airways

Fri, May 1 - Mon, May 4

11:40 am - 11:05 am

COS

LIS

40h 25m

2 stops

6:15 am - 9:57 pm

LIS

COS

22h 42m

2 stops

$993United Airlines

Sat, May 2 - Sat, May 16

6:40 pm - 10:40 am

DEN

FNC

57h 00m

2 stops

1:05 pm - 6:27 pm

FNC

DEN

36h 22m

2 stops

$1,077Iberia

Thu, Sep 17 - Thu, Sep 24

6:30 pm - 12:30 pm

DEN

FAO

35h 00m

1 stop

7:10 pm - 4:20 pm

FAO

DEN

28h 10m

1 stop

$1,085British Airways

Thu, Apr 30 - Sun, May 3

11:15 am - 8:40 am

DEN

PDL

15h 25m

2 stops

11:00 am - 6:05 pm

PDL

DEN

13h 05m

1 stop

$1,159United Airlines

Fri, May 8 - Fri, May 15

Turkish Airlines flights from Colorado to Portugal

Our best Turkish Airlines deals on Colorado to Portugal flight tickets

Turkish Airlines

Sep 24

DEN8:25 pmDenver Intl

20h 05m

1 stop

OPO11:30 pmPorto

Oct 22

OPO6:10 amPorto

19h 15m

1 stop

DEN6:25 pmDenver Intl

$675

Turkish Airlines

Aug 18

DEN8:25 pmDenver Intl

30h 35m

1 stop

OPO10:00 amPorto

Aug 26

OPO10:45 amPorto

38h 40m

1 stop

DEN6:25 pmDenver Intl

$685

Turkish Airlines

Apr 23

DEN8:25 pmDenver Intl

36h 00m

1 stop

LIS3:25 pmLisbon Humberto Delgado

May 6

LIS4:45 pmLisbon Humberto Delgado

32h 40m

1 stop

DEN6:25 pmDenver Intl

$695

Iberia flights from Colorado to Portugal

Our best Iberia deals on Colorado to Portugal flight tickets

Iberia

Apr 14

DEN5:10 pmDenver Intl

23h 15m

2 stops

LIS11:25 pmLisbon Humberto Delgado

Apr 23

LIS8:25 amLisbon Humberto Delgado

21h 20m

2 stops

DEN10:45 pmDenver Intl

$796

Iberia

Oct 4

DEN6:40 pmDenver Intl

30h 00m

2 stops

OPO7:40 amPorto

Oct 29

OPO8:20 amPorto

18h 12m

2 stops

DEN8:32 pmDenver Intl

$840

Iberia

Apr 21

DEN5:10 pmDenver Intl

19h 55m

2 stops

LIS8:05 pmLisbon Humberto Delgado

May 19

LIS6:35 amLisbon Humberto Delgado

23h 10m

2 stops

DEN10:45 pmDenver Intl

$843

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 9/24

8:25 pm-11:30 pm

1 stop20h 05m

Porto

Thu 10/22

6:10 am-6:25 pm

1 stop19h 15m

$675

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 8/18

8:25 pm-10:00 am

1 stop30h 35m

Porto

Wed 8/26

10:45 am-6:25 pm

1 stop38h 40m

$685

DenverFunchal

DEN - FNC

DENFNC

Denver Intl

Mon 5/4

5:14 pm-12:55 pm

2 stops36h 41m

Funchal Madeira

Mon 5/11

1:20 pm-12:06 am

2 stops41h 46m

$864

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Wed 9/23

8:00 am-3:50 pm

2 stops24h 50m

Lisbon Humberto Delgado

Mon 10/5

4:35 pm-10:57 pm

2 stops37h 22m

$876

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Thu 9/24

8:00 am-11:25 pm

2 stops32h 25m

Lisbon Humberto Delgado

Wed 9/30

6:35 am-10:57 pm

2 stops23h 22m

$950

DenverFaro

DEN - FAO

DENFAO

Denver Intl

Fri 5/1

6:30 pm-7:05 pm

1 stop17h 35m

Faro

Mon 5/4

11:10 am-4:20 pm

1 stop36h 10m

$955

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Sat 5/2

11:40 am-11:05 am

2 stops40h 25m

Lisbon Humberto Delgado

Sat 5/16

6:15 am-9:57 pm

2 stops22h 42m

$993

DenverFunchal

DEN - FNC

DENFNC

Denver Intl

Thu 9/17

6:40 pm-10:40 am

2 stops57h 00m

Funchal Madeira

Thu 9/24

1:05 pm-6:27 pm

2 stops36h 22m

$1,077

DenverFaro

DEN - FAO

DENFAO

Denver Intl

Thu 4/30

6:30 pm-12:30 pm

1 stop35h 00m

Faro

Sun 5/3

7:10 pm-4:20 pm

1 stop28h 10m

$1,085

Quickest round-trip

DenverPonta Delgada

DEN - PDL

DENPDL

Denver Intl

Fri 5/8

11:15 am-8:40 am

2 stops15h 25m

Ponta Delgada Nordela

Fri 5/15

11:00 am-6:05 pm

1 stop13h 05m

$1,159

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 January. Flight prices, which tend to average around $626, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Portugal from Colorado during February instead. Flights to Portugal in February, while not as cheap as those in January, still average around $630.

How far in advance should I book a flight 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 $894 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 $766 on momondo.

Can stopping save me money on Colorado to Portugal flights?

You could potentially save up to 5% 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

Fastest flight time	11h 05m
Direct flights	None

The fastest flight from Colorado to Portugal takes 11h 05m

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 April 2026, there are 13 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 7.0 632 reviews	Search Icelandair flights
United Airlines	PriceFrom $511	Free Cancellation	Rating 7.4 9,567 reviews	Search United Airlines flights
Lufthansa	PriceFrom $559	Free Cancellation	Rating 6.8 7,908 reviews	Search Lufthansa flights
Delta	PriceFrom $575	Free Cancellation	Rating 7.9 8,404 reviews	Search Delta flights
Air Canada	PriceFrom $595	Free Cancellation	Rating 7.1 10,915 reviews	Search Air Canada flights
KLM	PriceFrom $599	Free Cancellation	Rating 7.7 1,493 reviews	Search KLM flights
Virgin Atlantic	PriceFrom $603	Free Cancellation	Rating 7.5 685 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom $610	Free Cancellation	Rating 6.7 7,871 reviews	Search British Airways flights
American Airlines	PriceFrom $630	Free Cancellation	Rating 7.1 11,568 reviews	Search American Airlines flights
Air France	PriceFrom $651	Free Cancellation	Rating 7.4 1,564 reviews	Search Air France 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.

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Popular cities

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Other flights to Portugal

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Complete your trip

Feeling lucky

Popular cities in Portugal

Flights to Lisbonfrom $430

Flights to Portofrom $424

Flights to Funchalfrom $520

Flights to Farofrom $610

Flights to Ponta Delgadafrom $585

Flights to Lajesfrom $653

Flights to Pico Islandfrom $787

Flights to Hortafrom $638

Flights to Porto Santofrom $826

Flights to Velasfrom $778

Cheap flights from Colorado to Portugal from $368

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 7/28. 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 Portugal

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Turkish Airlines flights from Colorado to Portugal

Our best Turkish Airlines deals on Colorado to Portugal flight tickets

Iberia flights from Colorado to Portugal

Our best Iberia deals on Colorado to Portugal flight tickets

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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 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

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

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