What is the cheapest airline that flies from Portugal to Denver Intl?

TAP AIR PORTUGAL, Air Canada, and Iberia are the most popular carriers operating from Portugal to Denver Intl

How long does it take to fly to Denver?

Flight times vary depending on what airport in Portugal you fly out of and what airport in Denver you fly into. For example, flying from Lisbon to Denver takes 15h 25m on average. On the other hand, flying from Funchal to Denver takes 20h 55m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

When did momondo last update prices for flights from Portugal to Denver Intl Airport?

Prices for flights from Portugal to Denver Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Portugal to Denver Intl Airport?

As of April 2026, there is 1 operator available to choose from for flights from Portugal to Denver Intl Airport.

How old do you have to be to fly from Portugal to Denver Intl Airport?

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 Portugal to Denver Intl Airport.

What documentation or ID do you need to fly to Denver Intl Airport?

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

$360 Cheap Flights from Portugal to Denver in 2026

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Find the cheapest flights from Portugal to Denver

Round-trip

One-way

Last minute

Recent round-trip flight deals from Portugal to Denver

Enter your travel dates to find the best prices.

5:05 am - 3:40 pm

LIS

DEN

17h 35m

1 stop

8:10 am - 10:30 am

DEN

LIS

19h 20m

1 stop

$901United Airlines

Thu, Sep 10 - Thu, Sep 24

7:40 am - 9:40 am

LIS

DEN

33h 00m

2 stops

8:00 pm - 9:45 pm

DEN

LIS

18h 45m

1 stop

$902Multiple Airlines

Tue, Apr 28 - Mon, Aug 3

7:40 am - 9:40 am

LIS

DEN

33h 00m

2 stops

8:00 pm - 9:45 pm

DEN

LIS

18h 45m

1 stop

$904Multiple Airlines

Tue, Apr 28 - Sun, Aug 2

11:35 am - 8:27 am

LIS

DEN

27h 52m

2 stops

8:00 pm - 9:45 pm

DEN

LIS

18h 45m

1 stop

$906Multiple Airlines

Mon, May 4 - Mon, Aug 3

11:35 am - 9:40 am

LIS

DEN

29h 05m

2 stops

8:00 pm - 9:45 pm

DEN

LIS

18h 45m

1 stop

$907Multiple Airlines

Thu, Apr 30 - Mon, Aug 3

11:35 am - 9:40 am

LIS

DEN

29h 05m

2 stops

8:00 pm - 9:45 pm

DEN

LIS

18h 45m

1 stop

$908Multiple Airlines

Thu, Apr 30 - Sun, Aug 2

5:05 am - 7:40 pm

LIS

DEN

21h 35m

2 stops

8:25 pm - 10:45 pm

DEN

LIS

19h 20m

1 stop

$910United Airlines

Tue, May 19 - Sun, May 31

11:35 am - 9:40 am

LIS

DEN

29h 05m

2 stops

8:00 pm - 9:45 pm

DEN

LIS

18h 45m

1 stop

$915Multiple Airlines

Wed, Apr 29 - Mon, Aug 3

7:40 am - 9:40 am

LIS

DEN

33h 00m

2 stops

8:00 pm - 9:45 pm

DEN

LIS

18h 45m

1 stop

$916Multiple Airlines

Wed, Apr 29 - Sun, Aug 2

10:20 am - 9:40 am

LIS

DEN

30h 20m

1 stop

4:15 pm - 11:25 pm

DEN

LIS

24h 10m

2 stops

$927Multiple Airlines

Tue, Apr 28 - Tue, Aug 4

United Airlines flights from Portugal to Denver

Our best United Airlines deals on Portugal to Denver flight tickets

United Airlines

Sep 10

LIS5:05 amLisbon Humberto Delgado

17h 35m

1 stop

DEN3:40 pmDenver Intl

Sep 24

DEN8:10 amDenver Intl

19h 20m

1 stop

LIS10:30 amLisbon Humberto Delgado

$901

United Airlines

May 19

LIS5:05 amLisbon Humberto Delgado

21h 35m

2 stops

DEN7:40 pmDenver Intl

May 31

DEN8:25 pmDenver Intl

19h 20m

1 stop

LIS10:45 pmLisbon Humberto Delgado

$910

United Airlines

May 29

LIS5:05 amLisbon Humberto Delgado

21h 40m

2 stops

DEN7:45 pmDenver Intl

Jun 10

DEN11:59 pmDenver Intl

27h 31m

1 stop

LIS10:30 amLisbon Humberto Delgado

$963

Delta flights from Portugal to Denver

Our best Delta deals on Portugal to Denver flight tickets

Delta

May 1

LIS5:35 amLisbon Humberto Delgado

23h 54m

2 stops

DEN10:29 pmDenver Intl

May 8

DEN10:48 amDenver Intl

17h 27m

2 stops

LIS11:15 amLisbon Humberto Delgado

$941

Delta

May 1

LIS10:00 amLisbon Humberto Delgado

19h 48m

1 stop

DEN10:48 pmDenver Intl

May 8

DEN3:12 pmDenver Intl

19h 38m

2 stops

LIS5:50 pmLisbon Humberto Delgado

$952

Delta

May 18

LIS5:00 amLisbon Humberto Delgado

22h 15m

2 stops

DEN8:15 pmDenver Intl

May 30

DEN6:30 amDenver Intl

18h 30m

1 stop

LIS8:00 amLisbon Humberto Delgado

$966

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 9/10

5:05 am-3:40 pm

1 stop17h 35m

Denver Intl

Thu 9/24

8:10 am-10:30 am

1 stop19h 20m

$901

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Tue 4/28

7:40 am-9:40 am

2 stops33h 00m

Denver Intl

Mon 8/3

8:00 pm-9:45 pm

1 stop18h 45m

$902

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Tue 4/28

7:40 am-9:40 am

2 stops33h 00m

Denver Intl

Sun 8/2

8:00 pm-9:45 pm

1 stop18h 45m

$904

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Mon 5/4

11:35 am-8:27 am

2 stops27h 52m

Denver Intl

Mon 8/3

8:00 pm-9:45 pm

1 stop18h 45m

$906

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 4/30

11:35 am-9:40 am

2 stops29h 05m

Denver Intl

Mon 8/3

8:00 pm-9:45 pm

1 stop18h 45m

$907

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 4/30

11:35 am-9:40 am

2 stops29h 05m

Denver Intl

Sun 8/2

8:00 pm-9:45 pm

1 stop18h 45m

$908

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Tue 5/19

5:05 am-7:40 pm

2 stops21h 35m

Denver Intl

Sun 5/31

8:25 pm-10:45 pm

1 stop19h 20m

$910

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 4/29

11:35 am-9:40 am

2 stops29h 05m

Denver Intl

Mon 8/3

8:00 pm-9:45 pm

1 stop18h 45m

$915

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 4/29

7:40 am-9:40 am

2 stops33h 00m

Denver Intl

Sun 8/2

8:00 pm-9:45 pm

1 stop18h 45m

$916

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Tue 4/28

10:20 am-9:40 am

1 stop30h 20m

Denver Intl

Tue 8/4

4:15 pm-11:25 pm

2 stops24h 10m

$927

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 Portugal to Denver

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 Denver?

The cheapest month to fly to Denver from Portugal is in November. Flight prices, which tend to average around $875, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in November, then you should wait until May to fly from Portugal, when ticket prices are also cheap, with an average price of $901.

Can stopping save me money on Portugal to Denver flights?

You could potentially save up to 12% on your flight if you consider stops on a Portugal to Denver flight.

Cheap Portugal to Denver flight deals and tips

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

Fastest flight time	15h 25m
Direct flights	None

The fastest flight from Portugal to Denver takes 15h 25m

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

Search flight deals

Frequently asked questions about flying from Portugal to Denver

When did momondo last update prices for flights from Portugal to Denver Intl Airport?
Prices for flights from Portugal to Denver Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Portugal to Denver Intl Airport?
As of April 2026, there is 1 operator available to choose from for flights from Portugal to Denver Intl Airport.
How old do you have to be to fly from Portugal to Denver Intl Airport?
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 Portugal to Denver Intl Airport.
What documentation or ID do you need to fly to Denver Intl Airport?
The required travel and health documents for your Denver Intl Airport 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 Denver Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Portugal to Denver

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $920	Free Cancellation	Rating 7.4 9,538 reviews		Search United Airlines flights

Breckenridge

Estes Park

Black Hawk

Aurora

Fort Collins

Manitou Springs

Longmont

Boulder

Greeley

Keystone

Cripple Creek

Lakewood

Westminster

Thornton

Frisco

Centennial

Grand Lake

Winter Park

Englewood

Copper Mountain

Why use momondo?

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

It is quick and easy to find Portugal to Denver flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Denver that suits you.

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

momondo does allow users to show only those flights to Denver from Portugal which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between Portugal and Denver 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 Portugal to Denver right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Portugal to Denver now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Denver and let you know when they change.