What airlines fly to Denver?

British Airways, Delta and United Airlines are the top three most popular airlines that fly to Denver from Portugal according to our data. British Airways is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 3 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

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 30m on average. On the other hand, flying from Funchal to Denver takes 20h 11m 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 November 2025, there are 3 operators 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.

$357 Cheap Flights from Portugal to Denver in 2025/26

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Recent round-trip flight deals from Portugal to Denver

Enter your travel dates to find the best prices.

7:00 am - 8:19 amLIS-DEN

32h 19m2 stops

9:42 am - 9:55 amDEN-LIS

17h 13m1 stop

$778Multiple Airlines

Find Deal

Thu, Nov 20 - Wed, Dec 3

6:00 am - 3:42 pmLIS-DEN

40h 42m2 stops

9:42 am - 9:55 amDEN-LIS

17h 13m1 stop

$799Multiple Airlines

Find Deal

Sat, Nov 22 - Wed, Dec 3

11:35 am - 3:42 pmLIS-DEN

35h 07m2 stops

3:40 pm - 8:20 pmDEN-LIS

21h 40m1 stop

$810Multiple Airlines

Find Deal

Wed, Nov 19 - Sat, Dec 6

5:05 am - 1:35 pmLIS-DEN

15h 30m1 stop

5:40 pm - 9:20 amDEN-LIS

32h 40m1 stop

$853United Airlines

Find Deal

Wed, Apr 29 - Sun, May 3

5:00 am - 4:00 pmLIS-DEN

18h 00m1 stop

8:00 am - 10:15 amDEN-LIS

19h 15m1 stop

$854United Airlines

Find Deal

Mon, Nov 17 - Mon, Dec 1

5:00 am - 4:00 pmLIS-DEN

18h 00m1 stop

4:20 pm - 1:20 pmDEN-LIS

14h 00m1 stop

$862Lufthansa

Find Deal

Sun, Nov 23 - Fri, Dec 5

5:00 am - 4:30 pmLIS-DEN

18h 30m2 stops

11:15 am - 11:35 amDEN-LIS

17h 20m2 stops

$866Lufthansa

Find Deal

Thu, Nov 20 - Wed, Dec 3

5:00 am - 7:31 pmLIS-DEN

21h 31m2 stops

12:20 pm - 3:10 pmDEN-LIS

19h 50m2 stops

$867Delta

Find Deal

Wed, Nov 12 - Mon, Nov 24

5:00 am - 7:31 pmLIS-DEN

21h 31m2 stops

11:49 am - 8:00 amDEN-LIS

13h 11m1 stop

$871Delta

Find Deal

Wed, Nov 12 - Mon, Nov 24

11:05 am - 10:19 pmLIS-DEN

18h 14m2 stops

6:40 pm - 11:00 pmDEN-LIS

21h 20m1 stop

$878American Airlines

Find Deal

Wed, Apr 29 - Sun, May 3

United Airlines flights from Portugal to Denver

Our best United Airlines deals on Portugal to Denver flight tickets

United Airlines

Apr 29

LIS5:05 amLisbon Humberto Delgado

15h 30m

1 stop

DEN1:35 pmDenver Intl

May 3

DEN5:40 pmDenver Intl

32h 40m

1 stop

LIS9:20 amLisbon Humberto Delgado

$853

Find similar

United Airlines

Nov 17

LIS5:00 amLisbon Humberto Delgado

18h 00m

1 stop

DEN4:00 pmDenver Intl

Dec 1

DEN8:00 amDenver Intl

19h 15m

1 stop

LIS10:15 amLisbon Humberto Delgado

$854

Find similar

United Airlines

Nov 17

LIS5:00 amLisbon Humberto Delgado

18h 00m

1 stop

DEN4:00 pmDenver Intl

Nov 29

DEN12:59 amDenver Intl

26h 16m

1 stop

LIS10:15 amLisbon Humberto Delgado

$860

Find similar

Lufthansa flights from Portugal to Denver

Our best Lufthansa deals on Portugal to Denver flight tickets

Lufthansa

Nov 23

LIS5:00 amLisbon Humberto Delgado

18h 00m

1 stop

DEN4:00 pmDenver Intl

Dec 5

DEN4:20 pmDenver Intl

14h 00m

1 stop

LIS1:20 pmLisbon Humberto Delgado

$862

Find similar

Lufthansa

Nov 20

LIS5:00 amLisbon Humberto Delgado

18h 30m

2 stops

DEN4:30 pmDenver Intl

Dec 3

DEN11:15 amDenver Intl

17h 20m

2 stops

LIS11:35 amLisbon Humberto Delgado

$866

Find similar

Lufthansa

Dec 2

LIS6:10 amLisbon Humberto Delgado

19h 45m

1 stop

DEN6:55 pmDenver Intl

Dec 10

DEN11:15 amDenver Intl

16h 00m

1 stop

LIS10:15 amLisbon Humberto Delgado

$870

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/20

7:00 am-8:19 am

2 stops32h 19m

Denver Intl

Wed 12/3

9:42 am-9:55 am

1 stop17h 13m

$778

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Sat 11/22

6:00 am-3:42 pm

2 stops40h 42m

Denver Intl

Wed 12/3

9:42 am-9:55 am

1 stop17h 13m

$799

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 11/19

11:35 am-3:42 pm

2 stops35h 07m

Denver Intl

Sat 12/6

3:40 pm-8:20 pm

1 stop21h 40m

$810

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 4/29

5:05 am-1:35 pm

1 stop15h 30m

Denver Intl

Sun 5/3

5:40 pm-9:20 am

1 stop32h 40m

$853

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Mon 11/17

5:00 am-4:00 pm

1 stop18h 00m

Denver Intl

Mon 12/1

8:00 am-10:15 am

1 stop19h 15m

$854

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Sun 11/23

5:00 am-4:00 pm

1 stop18h 00m

Denver Intl

Fri 12/5

4:20 pm-1:20 pm

1 stop14h 00m

$862

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/20

5:00 am-4:30 pm

2 stops18h 30m

Denver Intl

Wed 12/3

11:15 am-11:35 am

2 stops17h 20m

$866

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 11/12

5:00 am-7:31 pm

2 stops21h 31m

Denver Intl

Mon 11/24

12:20 pm-3:10 pm

2 stops19h 50m

$867

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 11/12

5:00 am-7:31 pm

2 stops21h 31m

Denver Intl

Mon 11/24

11:49 am-8:00 am

1 stop13h 11m

$871

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 4/29

11:05 am-10:19 pm

2 stops18h 14m

Denver Intl

Sun 5/3

6:40 pm-11:00 pm

1 stop21h 20m

$878

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 February. Flight prices, which tend to average around $821, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in February, then you should wait until December to fly from Portugal, when ticket prices are also cheap, with an average price of $878.

What is the cheapest day to depart on your flight to Denver?

The cheapest day to depart on your flight to Denver is on a Wednesday when prices can be found for as low as $772. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Friday, with ticket prices averaging around $1,229.

Can stopping save me money on Portugal to Denver flights?

You could potentially save up to 1% 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

Direct flights	None

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

Search flight deals

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 November 2025, there are 3 operators 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
British Airways	PriceFrom $749	Free Cancellation	Rating 6.7 7,494 reviews	Search British Airways flights
Delta	PriceFrom $758	Free Cancellation	Rating 7.9 8,001 reviews	Search Delta flights
United Airlines	PriceFrom $809	Free Cancellation	Rating 7.4 8,997 reviews	Search United Airlines flights

Breckenridge

Estes Park

Black Hawk

Aurora

Fort Collins

Keystone

Cripple Creek

Manitou Springs

Longmont

Boulder

Greeley

Lakewood

Thornton

Westminster

Winter Park

Copper Mountain

Silverthorne

Frisco

Centennial

Grand Lake

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.