What airlines fly to Denver?

British Airways, United Airlines and Delta 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 39% 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 17h 06m on average. On the other hand, flying from Funchal to Denver takes 35h 31m 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.

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

Aer Lingus, Iberia, and British Airways are the most popular carriers operating from Portugal to Denver Intl

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 September 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.

$350 Cheap Flights from Portugal to Denver in 2025/26

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Find the cheapest flights from Portugal to Denver

Round-trip

One-way

Recent round-trip flight deals from Portugal to Denver

5:55 am - 11:16 pmLIS-DEN

24h 21m2 stops

9:09 am - 11:40 amDEN-LIS

19h 31m1 stop

$656Multiple Airlines

Find Deal

Thu, Nov 6 - Wed, Nov 19

5:55 am - 8:15 amLIS-DEN

33h 20m2 stops

9:09 am - 11:40 amDEN-LIS

19h 31m1 stop

$670Multiple Airlines

Find Deal

Thu, Nov 6 - Wed, Nov 19

6:55 am - 10:55 pmLIS-DEN

23h 00m2 stops

12:00 pm - 8:55 amDEN-LIS

37h 55m2 stops

$689Scandinavian Airlines

Find Deal

Fri, Jan 16 - Fri, Jan 23

7:00 am - 11:16 pmLIS-DEN

23h 16m2 stops

9:09 am - 11:40 amDEN-LIS

19h 31m1 stop

$691Multiple Airlines

Find Deal

Thu, Nov 13 - Wed, Nov 19

10:55 am - 12:55 pmLIS-DEN

32h 00m1 stop

4:31 pm - 5:40 pmDEN-LIS

18h 09m2 stops

$754American Airlines

Find Deal

Thu, Oct 30 - Wed, Nov 12

11:05 am - 11:18 pmLIS-DEN

19h 13m1 stop

8:13 am - 9:55 pmDEN-LIS

30h 42m2 stops

$755British Airways

Find Deal

Sun, Nov 16 - Thu, Nov 27

10:55 am - 9:55 pmLIS-DEN

17h 00m1 stop

2:48 pm - 2:45 pmDEN-LIS

16h 57m2 stops

$756British Airways

Find Deal

Thu, Oct 30 - Thu, Dec 4

5:00 am - 3:42 pmLIS-DEN

17h 42m2 stops

11:59 am - 11:20 amDEN-LIS

17h 21m2 stops

$772Delta

Find Deal

Wed, Oct 15 - Thu, Oct 30

5:00 am - 3:42 pmLIS-DEN

17h 42m2 stops

12:42 pm - 8:40 amDEN-LIS

13h 58m1 stop

$776Delta

Find Deal

Wed, Oct 15 - Wed, Oct 29

7:20 am - 4:25 pmLIS-DEN

16h 05m1 stop

1:27 pm - 5:40 pmDEN-LIS

22h 13m2 stops

$777American Airlines

Find Deal

Thu, Oct 16 - Wed, Oct 29

British Airways flights from Portugal to Denver

Our best British Airways deals on Portugal to Denver flight tickets

British Airways

Nov 16

LIS11:05 amLisbon Humberto Delgado

19h 13m

1 stop

DEN11:18 pmDenver Intl

Nov 27

DEN8:13 amDenver Intl

30h 42m

2 stops

LIS9:55 pmLisbon Humberto Delgado

$755

Find similar

British Airways

Oct 30

LIS10:55 amLisbon Humberto Delgado

17h 00m

1 stop

DEN9:55 pmDenver Intl

Dec 4

DEN2:48 pmDenver Intl

16h 57m

2 stops

LIS2:45 pmLisbon Humberto Delgado

$756

Find similar

British Airways

Oct 30

LIS10:55 amLisbon Humberto Delgado

17h 00m

1 stop

DEN9:55 pmDenver Intl

Dec 4

DEN2:48 pmDenver Intl

16h 57m

2 stops

LIS2:45 pmLisbon Humberto Delgado

$760

Find similar

American Airlines flights from Portugal to Denver

Our best American Airlines deals on Portugal to Denver flight tickets

American Airlines

Oct 30

LIS10:55 amLisbon Humberto Delgado

32h 00m

1 stop

DEN12:55 pmDenver Intl

Nov 12

DEN4:31 pmDenver Intl

18h 09m

2 stops

LIS5:40 pmLisbon Humberto Delgado

$754

Find similar

American Airlines

Oct 16

LIS7:20 amLisbon Humberto Delgado

16h 05m

1 stop

DEN4:25 pmDenver Intl

Oct 29

DEN1:27 pmDenver Intl

22h 13m

2 stops

LIS5:40 pmLisbon Humberto Delgado

$777

Find similar

American Airlines

Oct 29

LIS11:05 amLisbon Humberto Delgado

17h 05m

2 stops

DEN10:10 pmDenver Intl

Dec 3

DEN8:10 amDenver Intl

17h 45m

2 stops

LIS8:55 amLisbon Humberto Delgado

$779

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/6

5:55 am-11:16 pm

2 stops24h 21m

Denver Intl

Wed 11/19

9:09 am-11:40 am

1 stop19h 31m

$656

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/6

5:55 am-8:15 am

2 stops33h 20m

Denver Intl

Wed 11/19

9:09 am-11:40 am

1 stop19h 31m

$670

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Fri 1/16

6:55 am-10:55 pm

2 stops23h 00m

Denver Intl

Fri 1/23

12:00 pm-8:55 am

2 stops37h 55m

$689

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/13

7:00 am-11:16 pm

2 stops23h 16m

Denver Intl

Wed 11/19

9:09 am-11:40 am

1 stop19h 31m

$691

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 10/30

10:55 am-12:55 pm

1 stop32h 00m

Denver Intl

Wed 11/12

4:31 pm-5:40 pm

2 stops18h 09m

$754

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Sun 11/16

11:05 am-11:18 pm

1 stop19h 13m

Denver Intl

Thu 11/27

8:13 am-9:55 pm

2 stops30h 42m

$755

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 10/30

10:55 am-9:55 pm

1 stop17h 00m

Denver Intl

Thu 12/4

2:48 pm-2:45 pm

2 stops16h 57m

$756

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 10/15

5:00 am-3:42 pm

2 stops17h 42m

Denver Intl

Thu 10/30

11:59 am-11:20 am

2 stops17h 21m

$772

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 10/15

5:00 am-3:42 pm

2 stops17h 42m

Denver Intl

Wed 10/29

12:42 pm-8:40 am

1 stop13h 58m

$776

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 10/16

7:20 am-4:25 pm

1 stop16h 05m

Denver Intl

Wed 10/29

1:27 pm-5:40 pm

2 stops22h 13m

$777

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 October. Flight prices, which tend to average around $795, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in October, then you should wait until February to fly from Portugal, when ticket prices are also cheap, with an average price of $804.

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 15% 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 September 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 7,367 reviews	Search British Airways flights
Delta	PriceFrom $758	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
United Airlines	PriceFrom $766	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights

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Cripple Creek

Boulder

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Longmont

Lakewood

Greeley

Thornton

Westminster

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Copper Mountain

Frisco

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Central City

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.