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 59% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 11 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

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

Air Canada, Aer Lingus, 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 Colorado Springs to Lisbon is 13h 30m on average, while flying from Denver to Lisbon is 14h 10m on average. Lisbon is the most popular airport in 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 August 2026, there are 11 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.

$273 Cheap Flights from Colorado to Portugal in 2026

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.

3:40 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

$682Icelandair

Sat, Nov 7 - Sun, Nov 15

3:40 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

$683Icelandair

Wed, Dec 9 - Sun, Dec 13

11:20 am - 12:50 pmDEN Denver Intl-OPO Porto

18h 30m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss

6:00 am - 3:35 pmOPO Porto-DEN Denver Intl

16h 35m1 stop Frankfurt am Main

$692Multiple Airlines

Sun, Dec 6 - Tue, Dec 15

11:20 am - 11:50 amDEN Denver Intl-OPO Porto

17h 30m2 stops Montreal Pierre Elliott Trudeau Intl Brussels Bruxelles-National

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

16h 40m1 stop Frankfurt am Main

$693Multiple Airlines

Wed, Feb 3 - Wed, Apr 28

4:15 pm - 11:30 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

24h 15m1 stop Munich Franz Josef Strauss

5:00 am - 3:35 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

17h 35m1 stop Frankfurt am Main

$705Lufthansa

Sun, Nov 8 - Tue, Nov 17

5:15 pm - 1:30 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

14h 15m1 stop Munich Franz Josef Strauss

5:00 am - 3:35 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

17h 35m1 stop Frankfurt am Main

$705Lufthansa

Tue, Oct 27 - Fri, Nov 6

1:45 pm - 9:30 amDEN Denver Intl-OPO Porto

12h 45m1 stop Newark

6:00 am - 3:35 pmOPO Porto-DEN Denver Intl

16h 35m1 stop Frankfurt am Main

$707United Airlines

Sun, Dec 6 - Tue, Dec 15

7:20 pm - 8:55 amDEN Denver Intl-LIS Lisbon Humberto Delgado

30h 35m2 stops Edmonton Toronto Pearson Intl

11:20 am - 6:03 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

37h 43m2 stops Toronto Pearson Intl Edmonton

$712Air Canada

Tue, Nov 3 - Tue, Nov 17

9:40 am - 9:20 amDEN Denver Intl-LIS Lisbon Humberto Delgado

16h 40m1 stop Montreal Pierre Elliott Trudeau Intl

5:00 am - 6:13 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

20h 13m2 stops Frankfurt am Main Vancouver Intl

$723Air Canada

Wed, Oct 14 - Wed, Nov 4

5:30 am - 6:55 amCOS Colorado Springs-LIS Lisbon Humberto Delgado

19h 25m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

12:50 pm - 9:57 pmLIS Lisbon Humberto Delgado-COS Colorado Springs

40h 07m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$750United Airlines

Wed, Oct 28 - Tue, Nov 17

Cheap last minute flights

Enter your travel dates to find the best prices.

5:40 pm - 4:20 pmDEN Denver Intl-FNC Funchal Madeira

15h 40m1 stop Frankfurt am Main

3:40 pm - 3:40 pmFNC Funchal Madeira-DEN Denver Intl

31h 00m1 stop Frankfurt am Main

$1,009Lufthansa

Tue, Aug 11 - Tue, Aug 18

5:40 pm - 4:20 pmDEN Denver Intl-FNC Funchal Madeira

15h 40m1 stop Frankfurt am Main

3:40 pm - 1:45 pmFNC Funchal Madeira-DEN Denver Intl

29h 05m2 stops Frankfurt am Main Munich Franz Josef Strauss

$1,039Lufthansa

Tue, Aug 11 - Tue, Aug 18

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

21h 25m1 stop London Heathrow

12:30 pm - 11:53 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

18h 23m2 stops Madrid Barajas Dallas/Fort Worth

$1,091Multiple Airlines

Thu, Aug 13 - Thu, Aug 20

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

21h 25m1 stop London Heathrow

8:25 am - 10:16 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

20h 51m2 stops Madrid Barajas Dallas/Fort Worth

$1,091Multiple Airlines

Thu, Aug 13 - Thu, Aug 20

6:40 pm - 11:10 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

21h 30m1 stop London Heathrow

11:05 am - 10:43 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

18h 38m1 stop Philadelphia

$1,098British Airways

Fri, Aug 14 - Fri, Aug 21

6:40 pm - 11:10 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

21h 30m1 stop London Heathrow

11:05 am - 10:43 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

18h 38m1 stop Philadelphia

$1,098British Airways

Fri, Aug 14 - Fri, Aug 28

12:05 pm - 2:55 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

19h 50m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

5:00 am - 6:18 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

20h 18m2 stops Amsterdam Schiphol Los Angeles

$1,099Delta

Thu, Aug 13 - Thu, Aug 20

4:00 pm - 5:50 pmDEN Denver Intl-LIS Lisbon Humberto Delgado

18h 50m2 stops Minneapolis St Paul Paris Charles de Gaulle

5:00 am - 5:48 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

19h 48m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,099Delta

Thu, Aug 13 - Thu, Aug 20

9:16 am - 9:05 amDEN Denver Intl-LIS Lisbon Humberto Delgado

16h 49m2 stops Dallas/Fort Worth Philadelphia

8:25 am - 7:38 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

18h 13m2 stops Madrid Barajas Dallas/Fort Worth

$1,103American Airlines

Fri, Aug 14 - Fri, Aug 21

12:23 pm - 9:05 amDEN Denver Intl-LIS Lisbon Humberto Delgado

13h 42m2 stops Chicago O'Hare Intl Philadelphia

11:05 am - 10:43 pmLIS Lisbon Humberto Delgado-DEN Denver Intl

18h 38m1 stop Philadelphia

$1,110American Airlines

Fri, Aug 14 - Fri, Aug 28

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Icelandair flights from Colorado to Portugal

Our best Icelandair deals on Colorado to Portugal flight tickets

Icelandair

Nov 7

DEN3:40 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

$682

Icelandair

Dec 9

DEN3:40 pmDenver Intl

14h 10m

1 stop

LIS12:50 pmLisbon Humberto Delgado

Dec 13

LIS2:00 pmLisbon Humberto Delgado

35h 00m

1 stop

DEN6:00 pmDenver Intl

$683

Icelandair

Nov 7

DEN3:40 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

$686

Lufthansa flights from Colorado to Portugal

Our best Lufthansa deals on Colorado to Portugal flight tickets

Lufthansa

Oct 27

DEN5:15 pmDenver Intl

14h 15m

1 stop

LIS1:30 pmLisbon Humberto Delgado

Nov 6

LIS5:00 amLisbon Humberto Delgado

17h 35m

1 stop

DEN3:35 pmDenver Intl

$705

Lufthansa

Feb 2

DEN4:15 pmDenver Intl

14h 15m

1 stop

LIS1:30 pmLisbon Humberto Delgado

Feb 9

LIS6:05 amLisbon Humberto Delgado

15h 25m

1 stop

DEN2:30 pmDenver Intl

$707

Lufthansa

Oct 28

DEN6:25 pmDenver Intl

14h 25m

1 stop

LIS2:50 pmLisbon Humberto Delgado

Nov 4

LIS5:00 amLisbon Humberto Delgado

17h 35m

1 stop

DEN3:35 pmDenver Intl

$717

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Sat 11/7

3:40 pm-12:50 pm

1 stop14h 10m

Lisbon Humberto Delgado

Sun 11/15

2:00 pm-6:00 pm

1 stop35h 00m

$682

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Wed 12/9

3:40 pm-12:50 pm

1 stop14h 10m

Lisbon Humberto Delgado

Sun 12/13

2:00 pm-6:00 pm

1 stop35h 00m

$683

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 12/6

11:20 am-12:50 pm

2 stops18h 30m

Porto

Tue 12/15

6:00 am-3:35 pm

1 stop16h 35m

$692

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Wed 2/3

11:20 am-11:50 am

2 stops17h 30m

Porto

Wed 4/28

6:00 am-3:40 pm

1 stop16h 40m

$693

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Sun 11/8

4:15 pm-11:30 pm

1 stop24h 15m

Lisbon Humberto Delgado

Tue 11/17

5:00 am-3:35 pm

1 stop17h 35m

$705

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Tue 10/27

5:15 pm-1:30 pm

1 stop14h 15m

Lisbon Humberto Delgado

Fri 11/6

5:00 am-3:35 pm

1 stop17h 35m

$705

Quickest round-trip

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 12/6

1:45 pm-9:30 am

1 stop12h 45m

Porto

Tue 12/15

6:00 am-3:35 pm

1 stop16h 35m

$707

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Tue 11/3

7:20 pm-8:55 am

2 stops30h 35m

Lisbon Humberto Delgado

Tue 11/17

11:20 am-6:03 pm

2 stops37h 43m

$712

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Wed 10/14

9:40 am-9:20 am

1 stop16h 40m

Lisbon Humberto Delgado

Wed 11/4

5:00 am-6:13 pm

2 stops20h 13m

$723

Colorado SpringsLisbon

COS Colorado Springs - LIS Lisbon Humberto Delgado

COSLIS

Colorado Springs

Wed 10/28

5:30 am-6:55 am

2 stops19h 25m

Lisbon Humberto Delgado

Tue 11/17

12:50 pm-9:57 pm

2 stops40h 07m

$750

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 $637, 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 $734.

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 $939 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 $825 on momondo.

Can stopping save me money on Colorado to Portugal flights?

You could potentially save up to 12% 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 August 2026, there are 11 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 6.9 728 reviews	Search Icelandair flights
United Airlines	PriceFrom $514	Free Cancellation	Rating 7.4 10,099 reviews	Search United Airlines flights
KLM	PriceFrom $551	Free Cancellation	Rating 7.8 1,555 reviews	Search KLM flights
Lufthansa	PriceFrom $559	Free Cancellation	Rating 6.8 8,173 reviews	Search Lufthansa flights
Air France	PriceFrom $575	Free Cancellation	Rating 7.5 1,639 reviews	Search Air France flights
Delta	PriceFrom $575	Free Cancellation	Rating 7.8 8,497 reviews	Search Delta flights
Virgin Atlantic	PriceFrom $592	Free Cancellation	Rating 7.5 694 reviews	Search Virgin Atlantic flights
Air Canada	PriceFrom $596	Free Cancellation	Rating 7.1 11,459 reviews	Search Air Canada flights
British Airways	PriceFrom $622	Free Cancellation	Rating 6.7 8,153 reviews	Search British Airways flights
American Airlines	PriceFrom $630	Free Cancellation	Rating 7.1 11,897 reviews	Search American Airlines 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

Other flights from Colorado

Other flights to Portugal

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Portugal

Flights to Lisbonfrom $552

Flights to Portofrom $537

Flights to Funchalfrom $551

Flights to Farofrom $561

Flights to Ponta Delgadafrom $575

Flights to Lajesfrom $605

Flights to Hortafrom $670

Flights to Pico Islandfrom $644

Flights to Porto Santofrom $713

Flights to Velasfrom $691

Cheap flights from Colorado to Portugal from $273

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 8/31. 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

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Icelandair flights from Colorado to Portugal

Our best Icelandair deals on Colorado to Portugal flight tickets

Lufthansa flights from Colorado to Portugal

Our best Lufthansa 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

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